© 2017 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 09/14/17
Metal-Oxide Varistors (MOVs)
Low Profile / Application Specific Varistors > RA Series
RA Varistor Series
Description
The RA Series transient surge suppressors are varistors
(MOVs) supplied in a low-profile box that features a precise
seating plane to increase mechanical stability for secure
circuit-board mounting. This feature makes these devices
suitable for industrial applications critical to vibration. Their
construction permits operation up to 125ºC (ambient)
without derating.
The RA Series are available in voltage ratings up to 275V
VM(AC)RMS, and energy levels up to 140J. These varistors are
used in automotive, motor-control, telecommunication, and
military applications.
See RA Series Device Ratings and Specifications Table for
part number and brand information.
Features
Agency Approvals
Absolute Maximum Ratings
• For ratings of individual members of a series, see Device Ratings and Specifications chart
Continuous RA8 Series RA16 Series RA22 Series Units
Steady State Applied Voltage:
AC Voltage Range (VM(AC)RMS) 4 to 275 10 to 275 4 to 275 V
DC Voltage Range (VM(DC)) 5.5 to 369 14 to 369 18 to 369 V
Transients:
Peak Pulse Current (ITM)
For 8/20µs Current Wave (See Figure 2) 100 to 1200 1000 to 4500 2000 to 6500 A
Single Pulse Energy Range (Note 1)
For 10/1000µs Current Wave (WTM) 0.4 to 23 3.5 to 75 70 to 160 J
Operating Ambient Temperature Range (TA) -55 to +125 -55 to +125 -55 to +125 ºC
Storage Temperature Range (TSTG) -55 to +150 -55 to +150 -55 to +150 ºC
Temperature Coefficient (aV) of Clamping Voltage (VC) at Specified Test Current <0.01 <0.01 <0.01 %/ºC
Hi-Pot Encapsulation (COATING Isolation Voltage Capability)
(Delectric must withstand indicated DC voltage for one minute per MIL-STD 202, Method 301) 5000 5000 5000 V
COATING Insulation Resistance 1000 1000 1000 MΩ
CAUTION: Stresses above those listed in "Absolute Maximum Ratings" may cause permanent damage to the device. This is a stress only rating and operation of the device at these or
any other conditions above those indicated in the operational sections of this specification is not implied.
RoHS
• Lead–free/RoHS
compliant parts
available (add
suffix "x2749")
• Low profile outline with
precise seating plane
• No derating up to
125ºC ambient
• In-line leads
• Wide operating
voltage range:
VM(AC)RMS: 4 – 275V
VM(DC): 5.5 – 369V
• High energy absorption
capability W TM
up to 140J
• 3 model sizes available
A8, RA16, and RA22
Agency Agency Approval Agency File Number
UL1449 E320116
Additional Information
Datasheet Samples
Resources
© 2017 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 09/14/17
Metal-Oxide Varistors (MOVs)
Low Profile / Application Specific Varistors > RA Series
RA Series Ratings & Specifications
Part
Number
Brand
Maximum Rating (125°C) Specifications (25°C)
Continuous Transient
Varistor Voltage at 1mA
DC Test Current
Max Clamping
Volt VC
(8/20µs)
Typical
Capacitance
VRMS VDC
Energy
(10/1000µs)
Peak
Current
(8/20µs)
VM(AC) VM(DC) WTM ITM Min VN(DC) Max VCIpf = 1MHz
(mm) (V) (V) (J) (A) (V) (V) (V) (V) (A) (pF)
†RA8 Series
V8RA8 8R 4 5.5 0.4 150 6 8.6 11. 2 22 5 3000
V12RA8 12R 6 8 0.6 150 9 12.5 16 34 5 2500
V18RA8 18R 10 14 0.8 250 16.2 18 19.8 42 5 2000
V22RA8 22R 14 18
(Note 3)
10
(Note 2) 250 19.8 22 24.2 47 5 1600
V27RA8 27R 17 22 1. 0 250 24.3 27 29.7 57 5 1300
V33RA8 33R 20 26 1. 2 250 29.7 33 36.3 68 5 110 0
V39RA8 39R 25 31 1. 5 250 35.1 39 42.9 79 5 900
V47RA8 47R 30 38 1. 8 250 42.3 47 51.7 92 5 800
V56RA8 56R 35 45 2.3 250 50.4 56 61.6 107 5 700
V68RA8 68R 40 56 3.0 250 61.2 68 74.8 127 5 600
V82RA8 82R 50 66 4.0 1200 73.8 82 90.2 135 10 500
V100RA8 100R 60 81 5.0 1200 90 100 110 165 10 400
V120RA8 120R 75 102 6.0 1200 108 120 132 205 10 300
V150RA8 150R 95 127 8.0 1200 135 150 165 250 10 250
V180RA8 180R 115 153 10.0 1200 162 180 198 295 10 200
V200RA8 200R 130 175 11. 0 1200 184.5 205 225.5 340 10 180
† V220RA8 220R 140 180 12.0 1200 198 220 242 360 10 160
† V240RA8 240R 150 200 13.0 1200 216 240 264 395 10 150
† V270RA8 270R 175 225 15.0 1200 243 270 297 455 10 130
† V360RA8 360R 230 300 20.0 1200 324 360 396 595 10 10 0
† V390RA8 390R 250 330 21.0 1200 351 390 429 650 10 90
† V430RA8 430R 275 369 23.0 1200 387 430 473 710 10 80
†RA16 Series
V18RA16 18R16 10 14 3.5 1000 16.2 18 19.8 39 10 11000
V22RA16 22R16 14 18 (Note 3) 50 (Note 2) 1000 19.8 22 24.2 43 10 9000
V27RA16 27R16 17 22 5.0 1000 24.3 27 29.7 53 10 7000
V33RA16 33R16 20 26 6.0 1000 29.7 33 36.3 64 10 6000
V39RA16 39R16 25 31 7. 2 1000 35.1 39 42.9 76 10 5000
V47RA16 47R16 30 38 8.8 1000 42.3 47 51.7 89 10 4500
V56RA16 56R16 35 45 10.0 1000 50.4 56 61.6 103 10 3900
V68RA16 68R16 40 56 13.0 1000 61.2 68 74.8 123 10 3300
V82RA16 82R16 50 66 15.0 4500 73.8 82 90.2 145 50 2500
V100RA16 100R16 60 81 20.0 4500 90 100 110 175 50 2000
V120RA16 120R16 75 102 22.0 4500 108 120 132 205 50 1700
V150RA16 150R16 95 127 30.0 4500 135 150 165 255 50 1400
V180RA16 180R16 115 153 35.0 4500 162 180 198 300 50 110 0
V200RA16 200R16 130 175 38.0 4500 184.5 205 225.5 340 50 1000
† V220RA16 220R16 140 180 42.0 4500 198 220 242 360 50 900
† V240RA16 240R16 150 200 45.0 4500 216 240 264 395 50 800
† V270RA16 270R16 175 225 55.0 4500 243 270 297 455 50 700
† V360RA16 360R16 230 300 70.0 4500 324 360 396 595 50 550
† V390RA16 390R16 250 330 72.0 4500 351 390 429 650 50 500
† V430RA16 430R16 275 369 75.0 4500 387 430 473 710 50 450
© 2017 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 09/14/17
Metal-Oxide Varistors (MOVs)
Low Profile / Application Specific Varistors > RA Series
Part
Number
Brand
Maximum Rating (125°C) Specifications (25°C)
Continuous Transient
Varistor Voltage at 1mA
DC Test Current
Max Clamping
Volt VC
(8/20µs)
Typical
Capacitance
VRMS VDC
Energy
(10/1000µs)
Peak
Current
(8/20µs)
VM(AC) VM(DC) WTM ITM Min VN(DC) Max VCIpf = 1MHz
(mm) (V) (V) (J) (A) (V) (V) (V) (V) (A) (pF)
†RA22 Series
V24RA22 24R22 14 18
(Note 3)
100.0
(Note 2) 2000 21.6 24 26.4 43 20 18000
V36RA22 36R22 23 31 160.0
(Note 2) 2000 32.4 36 39.6 63 20 12000
† V200RA22 200R22 130 175 70.0 6500 184.5 205 225.5 340 10 0 1900
† V240RA22 240R22 150 200 80.0 6500 216 240 264 395 100 1600
† V270RA22 270R22 175 225 90.0 6500 243 270 297 455 100 1400
† V390RA22 390R22 250 330 130.0 6500 351 390 429 650 10 0 1000
† V430RA22 430R22 275 369 140.0 6500 387 430 473 710 100 900
RA Series Ratings & Specifications
NOTES: 1. Average power dissipation of transients not to exceed 0.25W for RA8 Series, 0.60W for RA16 Series, or 1.0W for RA22 Series.
2. Energy ratings for impulse duration of 30ms minimum to one half of peak current value.
3. Also rated to withstand 24V for 5 minutes.
4. 10mA DC Test Current.
† Under UL File No. E320116 as a recognized component. CSA approved File No. 91788.
Should transients occur in rapid succession, the average power
dissipation required is simply the energy (watt-seconds) per pulse
times the number of pulses per second. The power so developed
must be within the specifications shown on the Device Ratings
and Specifications table for the specific device. Furthermore,
the operating values need to be derated at high temperatures as
shown above. Because varistors can only dissipate a relatively
small amount of average power they are, therefore, not suitable
for repetitive applications that involve substantial amounts of aver-
age power dissipation.
Power Dissipation Ratings
FIGURE 2. PEAK PULSE CURRENT TEST WAVEFORM
100
90
50
10
O
1
T
T
1
T
2
TIME
PERCENT OF PEAK VALUE
O
1
= Virtual Origin of Wave
T = Time From 10% to 90% of Peak
T
1
= Virtual Front time = 1.25 • t
T
2
= Virtual Time to Half Value (Impulse Duration)
Example: For an 8/20 s Current Waveform:
8s = T
1
= Virtual Front Time
20 s = T
2
= Virtual Time to Half Value
Peak Pulse Current Test Waveform
01 = Virtual Origin of Wave
T = Time from 10% to 90% of Peak
T1 = Rise Time = 1.25 x T
T2 = Decay Time
Example - For an 8/20 µs Current Waveform:
8µs = T1 = Rise Time
20µs = T2 = Decay Time
FIGURE 1. CURRENT, ENERGY AND POWER DERATING
CURVE
100
90
80
70
60
50
40
30
20
10
0
-55 50 60 70 80 90 100110 120130 140150
AMBIENT TEMPERATURE (
o
C)
PERCENT OF RATED VALUE
Figure 1
Figure 2
© 2017 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 09/14/17
Metal-Oxide Varistors (MOVs)
Low Profile / Application Specific Varistors > RA Series
Repetitive Surge Capability for 8mm Parts
FIGURE 5. CLAMPING VOLTAGE FOR V18RA16 - V68RA16 FIGURE 6. CLAMPING VOLTAGE FOR V82RA16 - V430RA16
FIGURE 7. CLAMPING VOLTAGE FOR V24RA22 - V36RA22 FIGURE 8. CLAMPING VOLTAGE FOR V200RA22 - V430RA22
600
500
400
300
200
100
90
80
70
60
50
40
30
20
10-3 10-2 10-1 10 010 1102103
PEAK AMPERES (A)
MAXIMUM PEAK VOLTS (V)
V68RA16
V56RA16
V47RA16
V39RA16
V33RA16
V27RA16
V22RA16
V18RA16
MAXIMUM CLAMPING VOLTAGE
18 TO 68VN(DC) RATING
TA = -55oC TO 125oC
MAXIMUM PEAK VOLTS (V)
PEAK AMPERES (A)
10-2 10-1 10 010 110 2103
10-3
V180RA16
V150RA16
V120RA16
V100RA16
MAXIMUM CLAMPING VOLTAGE
MODEL SIZE 5 x 8mm
82 TO 430VN(DC) RATING
TA = -55oC TO 125oC
4,000
3,000
2,000
1,000
900
800
700
600
500
400
300
200
100
104
V82RA16
V270RA16
V360RA16
V220RA8
V200RA8
V240RA16
V430RA16
V390RA16
300
200
100
90
80
70
60
50
40
30
20
MAXIMUM PEAK VOLTS (V)
PEAK AMPERES (A)
10-2 10-1 10010 110 2103
10-3 104
V36RA22
V24RA22
MAXIMUM CLAMPING VOLTAGE
24 TO 36VN(DC) RATING
TA = -55oC TO 125oC
MAXIMUM PEAK VOLTS (V)
PEAK AMPERES (A)
10-2 10-1 10010 110 2103
10-3
4,000
3,000
2,000
1,000
900
800
700
600
500
400
300
200
100104
MAXIMUM CLAMPING VOLTAGE
200 TO 430VN(DC) RATING
TA = -55oC TO 125oC
V430RA22
V390RA22
V270RA22
V240RA22
V200RA22
Pulse Rating Curves
FIGURE 9. SURGE CURRENT RATING CURVES FOR
V8RA8 - V12RA8
FIGURE 10. SURGE CURRENT RATING CURVES FOR
V18RA8 - V68RA8
20 100 1,000 10,000
IMPULSE DURATION
SURGE CURRENT (A)
1
10
102
V8RA8 - V12RA8
2
103
INDEFINITE
104
105
106
200
100
50
20
10
5
2
1
0.5
0.2
20 100 1,000 10,000
IMPULSE DURATION (μs)
(μs)
SURGE CURRENT (A)
1
10
102
V18RA8 - V68RA8
2
103
INDEFINITE
500
200
100
50
20
10
2
1
0.5
0.2
104
105
106
5
FIGURE 5. CLAMPING VOLTAGE FOR V18RA16 - V68RA16 FIGURE 6. CLAMPING VOLTAGE FOR V82RA16 - V430RA16
FIGURE 7. CLAMPING VOLTAGE FOR V24RA22 - V36RA22 FIGURE 8. CLAMPING VOLTAGE FOR V200RA22 - V430RA22
600
500
400
300
200
100
90
80
70
60
50
40
30
20
10-3 10-2 10-1 10 010 1102103
PEAK AMPERES (A)
MAXIMUM PEAK VOLTS (V)
V68RA16
V56RA16
V47RA16
V39RA16
V33RA16
V27RA16
V22RA16
V18RA16
MAXIMUM CLAMPING VOLTAGE
18 TO 68VN(DC) RATING
TA = -55oC TO 125oC
MAXIMUM PEAK VOLTS (V)
PEAK AMPERES (A)
10-2 10-1 10 010 110 2103
10-3
V180RA16
V150RA16
V120RA16
V100RA16
MAXIMUM CLAMPING VOLTAGE
MODEL SIZE 5 x 8mm
82 TO 430VN(DC) RATING
TA = -55oC TO 125oC
4,000
3,000
2,000
1,000
900
800
700
600
500
400
300
200
100
104
V82RA16
V270RA16
V360RA16
V220RA8
V200RA8
V240RA16
V430RA16
V390RA16
300
200
100
90
80
70
60
50
40
30
20
MAXIMUM PEAK VOLTS (V)
PEAK AMPERES (A)
10-2 10-1 10010 110 2103
10-3 104
V36RA22
V24RA22
MAXIMUM CLAMPING VOLTAGE
24 TO 36VN(DC) RATING
TA = -55oC TO 125oC
MAXIMUM PEAK VOLTS (V)
PEAK AMPERES (A)
10-2 10-1 10010 110 2103
10-3
4,000
3,000
2,000
1,000
900
800
700
600
500
400
300
200
100104
MAXIMUM CLAMPING VOLTAGE
200 TO 430VN(DC) RATING
TA = -55oC TO 125oC
V430RA22
V390RA22
V270RA22
V240RA22
V200RA22
Pulse Rating Curves
FIGURE 9. SURGE CURRENT RATING CURVES FOR
V8RA8 - V12RA8
FIGURE 10. SURGE CURRENT RATING CURVES FOR
V18RA8 - V68RA8
20 100 1,000 10,000
IMPULSE DURATION
SURGE CURRENT (A)
1
10
102
V8RA8 - V12RA8
2
103
INDEFINITE
104
105
106
200
100
50
20
10
5
2
1
0.5
0.2
20 100 1,000 10,000
IMPULSE DURATION (μs)
(μs)
SURGE CURRENT (A)
1
10
102
V18RA8 - V68RA8
2
103
INDEFINITE
500
200
100
50
20
10
2
1
0.5
0.2
104
105
106
5
FIGURE 3. CLAMPING VOLTAGE FOR V8RA8 - V68RA8
600
500
400
300
200
100
90
80
70
60
50
40
30
20
10
10-3 10-2 10 -1 10010 110 2103
PEAK AMPERES (A)
MAXIMUM PEAK VOLTS (V)
V68RA8
V56RA8
V47RA8
V39RA8
V33RA8
V27RA8
V22RA8
V18RA8
V12RA8
V8RA8
MAXIMUM CLAMPING VOLTAGE
8 T
O
68VN(DC) RATING
TA = -55oC TO 125oC
FIGURE 4. CLAMPING VOLTAGE FOR V82RA8 - V430RA8
MAXIMUM PEAK VOLTS (V)
PEAK AMPERES (A)
10-2 10-1 10 010110 210 3
10-3
V180RA8
V150RA8
V120RA8
V100RA8
MAXIMUM CLAMPING VOLTAGE
MODEL SIZE 5 x 8mm
82 TO 430VN(DC) RATING
TA = -55oC TO 125oC
4,000
3,000
2,000
1,000
900
800
700
600
500
400
300
200
100
104
V82RA8
V270RA8
V360RA8
V220RA8
V200RA8
V240RA8
V430RA8
V390RA8
Maximum Clamping Voltage for 8mm Parts
FIGURE 3. CLAMPING VOLTAGE FOR V8RA8 - V68RA8
600
500
400
300
200
100
90
80
70
60
50
40
30
20
10
10-3 10-2 10 -1 10 010110210 3
PEAK AMPERES (A)
MAXIMUM PEAK VOLTS (V)
V68RA8
V56RA8
V47RA8
V39RA8
V33RA8
V27RA8
V22RA8
V18RA8
V12RA8
V8RA8
MAXIMUM CLAMPING VOLTAGE
8 T
O
68VN(DC) RATING
TA = -55oC TO 125oC
FIGURE 4. CLAMPING VOLTAGE FOR V82RA8 - V430RA8
MAXIMUM PEAK VOLTS (V)
PEAK AMPERES (A)
10-2 10-1 10 010 1102103
10-3
V180RA8
V150RA8
V120RA8
V100RA8
MAXIMUM CLAMPING VOLTAGE
MODEL SIZE 5 x 8mm
82 TO 430VN(DC) RATING
TA = -55oC TO 125oC
4,000
3,000
2,000
1,000
900
800
700
600
500
400
300
200
100
104
V82RA8
V270RA8
V360RA8
V220RA8
V200RA8
V240RA8
V430RA8
V390RA8
FIGURE 11. SURGE CURRENT RATING CURVES FOR
V82RA8 - V430RA8
FIGURE 12.SURGE CURRENT RATING CURVES FOR
V18RA16 - V68RA16
FIGURE 13. SURGE CURRENT RATING CURVES FOR
V82RA16 - V430RA16
FIGURE 14. SURGE CURRENT RATING CURVES FOR
V24RA22 - V36RA22
2,000
1,000
200
100
50
20
10
5
1
2
500
20 100 1,000 10,000
IMPULSE DURATION (μs)
SURGE CURRENT (A)
1
2
10
102104
105
106
V82RA8 - V430RA8
103
INDEFINITE
200
100
50
20
10
5
1
2
20 100 1,000 10,000
IMPULSE DURATION
SURGE CURRENT (A)
1
2
10
102
104
105
106
V18RA16 - V68RA16
103
INDEFINITE
1,000
500
5,000
2,000
200
100
50
20
10
5
2
500
20 100 1,000 10,000
IMPULSE DURATION
SURGE CURRENT (A)
1
2
10
104
105
106
V82RA16 - V430RA16
103
INDEFINITE
1,000 102
2,000
200
100
50
20
10
5
2
500
20 100 1,000 10,000
IMPULSE DURATION
SURGE CURRENT (A)
1
2
10
V24RA22 - V36RA22
1,000
102
103
104
105
106
INDEFINITE
FIGURE 15. SURGE CURRENT RATING CURVES FOR V200RA22 - V430RA22
10,000
2,000
200
100
50
20
10
5
2
500
20 100 1,000 10,000
IMPULSE DURATION
SURGE CURRENT (A)
12
104
105
106
V200RA22 - V430RA22
103
INDEFINITE
1,000
102
10
5,000
1
(μs)
(μs)
(μs)
(μs)
V8RA8 - V68RA8
V82RA8 - V430RA8
V8RA8 - V12RA8
V18RA8 - V68RA8
V82RA8 - V430RA8
Figure 3 Figure 5
Figure 4 Figure 6
Figure 7
© 2017 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 09/14/17
Metal-Oxide Varistors (MOVs)
Low Profile / Application Specific Varistors > RA Series
Repetitive Surge Capability for 16mm Parts
FIGURE 11. SURGE CURRENT RATING CURVES FOR
V82RA8 - V430RA8
FIGURE 12.SURGE CURRENT RATING CURVES FOR
V18RA16 - V68RA16
FIGURE 13. SURGE CURRENT RATING CURVES FOR
V82RA16 - V430RA16
FIGURE 14. SURGE CURRENT RATING CURVES FOR
V24RA22 - V36RA22
2,000
1,000
200
100
50
20
10
5
1
2
500
20 100 1,000 10,000
IMPULSE DURATION (μs)
SURGE CURRENT (A)
1
2
10
102104
105
106
V82RA8 - V430RA8
103
INDEFINITE
200
100
50
20
10
5
1
2
20 100 1,000 10,000
IMPULSE DURATION
SURGE CURRENT (A)
1
2
10
102
104
105
106
V18RA16 - V68RA16
103
INDEFINITE
1,000
500
5,000
2,000
200
100
50
20
10
5
2
500
20 100 1,000 10,000
IMPULSE DURATION
SURGE CURRENT (A)
1
2
10
104
105
106
V82RA16 - V430RA16
103
INDEFINITE
1,000 102
2,000
200
100
50
20
10
5
2
500
20 100 1,000 10,000
IMPULSE DURATION
SURGE CURRENT (A)
1
2
10
V24RA22 - V36RA22
1,000
102
103
104
105
106
INDEFINITE
FIGURE 15. SURGE CURRENT RATING CURVES FOR V200RA22 - V430RA22
10,000
2,000
200
100
50
20
10
5
2
500
20 100 1,000 10,000
IMPULSE DURATION
SURGE CURRENT (A)
12
104
105
106
V200RA22 - V430RA22
103
INDEFINITE
1,000
102
10
5,000
1
(μs)
(μs)
(μs)
(μs)
FIGURE 11. SURGE CURRENT RATING CURVES FOR
V82RA8 - V430RA8
FIGURE 12.SURGE CURRENT RATING CURVES FOR
V18RA16 - V68RA16
FIGURE 13. SURGE CURRENT RATING CURVES FOR
V82RA16 - V430RA16
FIGURE 14. SURGE CURRENT RATING CURVES FOR
V24RA22 - V36RA22
2,000
1,000
200
100
50
20
10
5
1
2
500
20 100 1,000 10,000
IMPULSE DURATION (μs)
SURGE CURRENT (A)
1
2
10
102104
105
106
V82RA8 - V430RA8
103
INDEFINITE
200
100
50
20
10
5
1
2
20 100 1,000 10,000
IMPULSE DURATION
SURGE CURRENT (A)
1
2
10
102
104
105
106
V18RA16 - V68RA16
103
INDEFINITE
1,000
500
5,000
2,000
200
100
50
20
10
5
2
500
20 100 1,000 10,000
IMPULSE DURATION
SURGE CURRENT (A)
1
2
10
104
105
106
V82RA16 - V430RA16
103
INDEFINITE
1,000 102
2,000
200
100
50
20
10
5
2
500
20 100 1,000 10,000
IMPULSE DURATION
SURGE CURRENT (A)
1
2
10
V24RA22 - V36RA22
1,000
102
103
104
105
106
INDEFINITE
FIGURE 15. SURGE CURRENT RATING CURVES FOR V200RA22 - V430RA22
10,000
2,000
200
100
50
20
10
5
2
500
20 100 1,000 10,000
IMPULSE DURATION
SURGE CURRENT (A)
12
104
105
106
V200RA22 - V430RA22
103
INDEFINITE
1,000
102
10
5,000
1
(μs)
(μs)
(μs)
(μs)
Maximum Clamping Voltage for 16mm Parts
MAXIMUM PEAK VOLTS (V)
PEAK AMPERES (A)
10-2 10-1 10 010 110 2103
10-3
V180RA16
V150RA16
V120RA16
V100RA16
MAXIMUM CLAMPING VOLTAGE
MODEL SIZE 5 x 8mm
82 TO 430VN(DC) RATING
TA = -55oC TO 125oC
4,000
3,000
2,000
1,000
900
800
700
600
500
400
300
200
100
104
V82RA16
V270RA16
V360RA16
V220RA8
V200RA8
V240RA16
V430RA16
V390RA16
FIGURE 5. CLAMPING VOLTAGE FOR V18RA16 - V68RA16 FIGURE 6. CLAMPING VOLTAGE FOR V82RA16 - V430RA16
FIGURE 7. CLAMPING VOLTAGE FOR V24RA22 - V36RA22 FIGURE 8. CLAMPING VOLTAGE FOR V200RA22 - V430RA22
600
500
400
300
200
100
90
80
70
60
50
40
30
20
10-3 10-2 10-1 10 010 1102103
PEAK AMPERES (A)
MAXIMUM PEAK VOLTS (V)
V68RA16
V56RA16
V47RA16
V39RA16
V33RA16
V27RA16
V22RA16
V18RA16
MAXIMUM CLAMPING VOLTAGE
18 TO 68VN(DC) RATING
TA = -55oC TO 125oC
MAXIMUM PEAK VOLTS (V)
PEAK AMPERES (A)
10-2 10-1 10 010 110 2103
10-3
V180RA16
V150RA16
V120RA16
V100RA16
MAXIMUM CLAMPING VOLTAGE
MODEL SIZE 5 x 8mm
82 TO 430VN(DC) RATING
TA = -55oC TO 125oC
4,000
3,000
2,000
1,000
900
800
700
600
500
400
300
200
100
104
V82RA16
V270RA16
V360RA16
V220RA8
V200RA8
V240RA16
V430RA16
V390RA16
300
200
100
90
80
70
60
50
40
30
20
MAXIMUM PEAK VOLTS (V)
PEAK AMPERES (A)
10-2 10-1 10010 110 2103
10-3 104
V36RA22
V24RA22
MAXIMUM CLAMPING VOLTAGE
24 TO 36VN(DC) RATING
TA = -55oC TO 125oC
MAXIMUM PEAK VOLTS (V)
PEAK AMPERES (A)
10-2 10-1 10010 110 2103
10-3
4,000
3,000
2,000
1,000
900
800
700
600
500
400
300
200
100104
MAXIMUM CLAMPING VOLTAGE
200 TO 430VN(DC) RATING
TA = -55oC TO 125oC
V430RA22
V390RA22
V270RA22
V240RA22
V200RA22
Pulse Rating Curves
FIGURE 9. SURGE CURRENT RATING CURVES FOR
V8RA8 - V12RA8
FIGURE 10. SURGE CURRENT RATING CURVES FOR
V18RA8 - V68RA8
20 100 1,000 10,000
IMPULSE DURATION
SURGE CURRENT (A)
1
10
102
V8RA8 - V12RA8
2
103
INDEFINITE
104
105
106
200
100
50
20
10
5
2
1
0.5
0.2 20 100 1,000 10,000
IMPULSE DURATION (μs)
(μs)
SURGE CURRENT (A)
1
10
102
V18RA8 - V68RA8
2
103
INDEFINITE
500
200
100
50
20
10
2
1
0.5
0.2
104
105
106
5
V18RA16 - V68RA16
V82RA16 - V430RA16
V18RA16 - V68RA16
V82RA16 - V430RA16
Figure 8 Figure 10
Figure 9 Figure 11
© 2017 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 09/14/17
Metal-Oxide Varistors (MOVs)
Low Profile / Application Specific Varistors > RA Series
NOTE: If pulse ratings are exceeded, a shift of VN(DC) (at specified current) of more than
±10% could result. This type of shift, which normally results in a decrease of VN(DC), may
result in the device not meeting the original published specifications, but it does not prevent
the device from continuing to function, and to provide ample protection.
Maximum Clamping Voltage for 22mm Parts
FIGURE 5. CLAMPING VOLTAGE FOR V18RA16 - V68RA16 FIGURE 6. CLAMPING VOLTAGE FOR V82RA16 - V430RA16
FIGURE 7. CLAMPING VOLTAGE FOR V24RA22 - V36RA22 FIGURE 8. CLAMPING VOLTAGE FOR V200RA22 - V430RA22
600
500
400
300
200
100
90
80
70
60
50
40
30
20
10-3 10-2 10-1 10 010 1102103
PEAK AMPERES (A)
MAXIMUM PEAK VOLTS (V)
V68RA16
V56RA16
V47RA16
V39RA16
V33RA16
V27RA16
V22RA16
V18RA16
MAXIMUM CLAMPING VOLTAGE
18 TO 68VN(DC) RATING
TA = -55oC TO 125oC
MAXIMUM PEAK VOLTS (V)
PEAK AMPERES (A)
10-2 10-1 10 010 110 2103
10-3
V180RA16
V150RA16
V120RA16
V100RA16
MAXIMUM CLAMPING VOLTAGE
MODEL SIZE 5 x 8mm
82 TO 430VN(DC) RATING
TA = -55oC TO 125oC
4,000
3,000
2,000
1,000
900
800
700
600
500
400
300
200
100
104
V82RA16
V270RA16
V360RA16
V220RA8
V200RA8
V240RA16
V430RA16
V390RA16
300
200
100
90
80
70
60
50
40
30
20
MAXIMUM PEAK VOLTS (V)
PEAK AMPERES (A)
10-2 10-1 10010 110 2103
10-3 104
V36RA22
V24RA22
MAXIMUM CLAMPING VOLTAGE
24 TO 36VN(DC) RATING
TA = -55oC TO 125oC
MAXIMUM PEAK VOLTS (V)
PEAK AMPERES (A)
10-2 10-1 10010 110 2103
10-3
4,000
3,000
2,000
1,000
900
800
700
600
500
400
300
200
100104
MAXIMUM CLAMPING VOLTAGE
200 TO 430VN(DC) RATING
TA = -55oC TO 125oC
V430RA22
V390RA22
V270RA22
V240RA22
V200RA22
Pulse Rating Curves
FIGURE 9. SURGE CURRENT RATING CURVES FOR
V8RA8 - V12RA8
FIGURE 10. SURGE CURRENT RATING CURVES FOR
V18RA8 - V68RA8
20 100 1,000 10,000
IMPULSE DURATION
SURGE CURRENT (A)
1
10
102
V8RA8 - V12RA8
2
103
INDEFINITE
104
105
106
200
100
50
20
10
5
2
1
0.5
0.2 20 100 1,000 10,000
IMPULSE DURATION (μs)
(μs)
SURGE CURRENT (A)
1
10
102
V18RA8 - V68RA8
2
103
INDEFINITE
500
200
100
50
20
10
2
1
0.5
0.2
104
105
106
5
FIGURE 5. CLAMPING VOLTAGE FOR V18RA16 - V68RA16 FIGURE 6. CLAMPING VOLTAGE FOR V82RA16 - V430RA16
FIGURE 7. CLAMPING VOLTAGE FOR V24RA22 - V36RA22 FIGURE 8. CLAMPING VOLTAGE FOR V200RA22 - V430RA22
600
500
400
300
200
100
90
80
70
60
50
40
30
20
10-3 10-2 10-1 10 010 1102103
PEAK AMPERES (A)
MAXIMUM PEAK VOLTS (V)
V68RA16
V56RA16
V47RA16
V39RA16
V33RA16
V27RA16
V22RA16
V18RA16
MAXIMUM CLAMPING VOLTAGE
18 TO 68VN(DC) RATING
TA = -55oC TO 125oC
MAXIMUM PEAK VOLTS (V)
PEAK AMPERES (A)
10-2 10-1 10 010 110 2103
10-3
V180RA16
V150RA16
V120RA16
V100RA16
MAXIMUM CLAMPING VOLTAGE
MODEL SIZE 5 x 8mm
82 TO 430VN(DC) RATING
TA = -55oC TO 125oC
4,000
3,000
2,000
1,000
900
800
700
600
500
400
300
200
100
104
V82RA16
V270RA16
V360RA16
V220RA8
V200RA8
V240RA16
V430RA16
V390RA16
300
200
100
90
80
70
60
50
40
30
20
MAXIMUM PEAK VOLTS (V)
PEAK AMPERES (A)
10-2 10-1 10010 110 2103
10-3 104
V36RA22
V24RA22
MAXIMUM CLAMPING VOLTAGE
24 TO 36VN(DC) RATING
TA = -55oC TO 125oC
MAXIMUM PEAK VOLTS (V)
PEAK AMPERES (A)
10-2 10-1 10010 110 2103
10-3
4,000
3,000
2,000
1,000
900
800
700
600
500
400
300
200
100104
MAXIMUM CLAMPING VOLTAGE
200 TO 430VN(DC) RATING
TA = -55oC TO 125oC
V430RA22
V390RA22
V270RA22
V240RA22
V200RA22
Pulse Rating Curves
FIGURE 9. SURGE CURRENT RATING CURVES FOR
V8RA8 - V12RA8
FIGURE 10. SURGE CURRENT RATING CURVES FOR
V18RA8 - V68RA8
20 100 1,000 10,000
IMPULSE DURATION
SURGE CURRENT (A)
1
10
102
V8RA8 - V12RA8
2
103
INDEFINITE
104
105
106
200
100
50
20
10
5
2
1
0.5
0.2 20 100 1,000 10,000
IMPULSE DURATION (μs)
(μs)
SURGE CURRENT (A)
1
10
102
V18RA8 - V68RA8
2
103
INDEFINITE
500
200
100
50
20
10
2
1
0.5
0.2
104
105
106
5
Repetitive Surge Capability for 22mm Parts
FIGURE 11. SURGE CURRENT RATING CURVES FOR
V82RA8 - V430RA8
FIGURE 12.SURGE CURRENT RATING CURVES FOR
V18RA16 - V68RA16
FIGURE 13. SURGE CURRENT RATING CURVES FOR
V82RA16 - V430RA16
FIGURE 14. SURGE CURRENT RATING CURVES FOR
V24RA22 - V36RA22
2,000
1,000
200
100
50
20
10
5
1
2
500
20 100 1,000 10,000
IMPULSE DURATION (μs)
SURGE CURRENT (A)
1
2
10
102104
105
106
V82RA8 - V430RA8
103
INDEFINITE
200
100
50
20
10
5
1
2
20 100 1,000 10,000
IMPULSE DURATION
SURGE CURRENT (A)
1
2
10
102
104
105
106
V18RA16 - V68RA16
103
INDEFINITE
1,000
500
5,000
2,000
200
100
50
20
10
5
2
500
20 100 1,000 10,000
IMPULSE DURATION
SURGE CURRENT (A)
1
2
10
104
105
106
V82RA16 - V430RA16
103
INDEFINITE
1,000 102
2,000
200
100
50
20
10
5
2
500
20 100 1,000 10,000
IMPULSE DURATION
SURGE CURRENT (A)
1
2
10
V24RA22 - V36RA22
1,000
102
103
104
105
106
INDEFINITE
FIGURE 15. SURGE CURRENT RATING CURVES FOR V200RA22 - V430RA22
10,000
2,000
200
100
50
20
10
5
2
500
20 100 1,000 10,000
IMPULSE DURATION
SURGE CURRENT (A)
12
104
105
106
V200RA22 - V430RA22
103
INDEFINITE
1,000
102
10
5,000
1
(μs)
(μs)
(μs)
(μs)
FIGURE 11. SURGE CURRENT RATING CURVES FOR
V82RA8 - V430RA8
FIGURE 12.SURGE CURRENT RATING CURVES FOR
V18RA16 - V68RA16
FIGURE 13. SURGE CURRENT RATING CURVES FOR
V82RA16 - V430RA16
FIGURE 14. SURGE CURRENT RATING CURVES FOR
V24RA22 - V36RA22
2,000
1,000
200
100
50
20
10
5
1
2
500
20 100 1,000 10,000
IMPULSE DURATION (μs)
SURGE CURRENT (A)
1
2
10
102104
105
106
V82RA8 - V430RA8
103
INDEFINITE
200
100
50
20
10
5
1
2
20 100 1,000 10,000
IMPULSE DURATION
SURGE CURRENT (A)
1
2
10
102
104
105
106
V18RA16 - V68RA16
103
INDEFINITE
1,000
500
5,000
2,000
200
100
50
20
10
5
2
500
20 100 1,000 10,000
IMPULSE DURATION
SURGE CURRENT (A)
1
2
10
104
105
106
V82RA16 - V430RA16
103
INDEFINITE
1,000 102
2,000
200
100
50
20
10
5
2
500
20 100 1,000 10,000
IMPULSE DURATION
SURGE CURRENT (A)
1
2
10
V24RA22 - V36RA22
1,000
102
103
104
105
106
INDEFINITE
FIGURE 15. SURGE CURRENT RATING CURVES FOR V200RA22 - V430RA22
10,000
2,000
200
100
50
20
10
5
2
500
20 100 1,000 10,000
IMPULSE DURATION
SURGE CURRENT (A)
12
104
105
106
V200RA22 - V430RA22
103
INDEFINITE
1,000
102
10
5,000
1
(μs)
(μs)
(μs)
(μs)
V24RA22 - V36RA22
V200RA22 - V430RA22
V24RA22 - V36RA22
V200RA22 - V430RA22
Figure 12 Figure 14
Figure 13 Figure 15
© 2017 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 09/14/17
Metal-Oxide Varistors (MOVs)
Low Profile / Application Specific Varistors > RA Series
Reflow Condition Pb – Free assembly
Pre Heat
- Temperature Min (Ts(min)) 150°C
- Temperature Max (Ts(max)) 200°C
- Time (min to max) (ts) 60 – 180 secs
Average ramp–up rate (Liquidus Temp (TL)
to peak 5°C/second max
TS(max) to TL - Ramp-up Rate 5°C/second max
Reflow - Temperature (TL) (Liquidus) 217°C
- Temperature (tL) 60 – 150 seconds
Peak Temperature (TP) 250+0/-5°C
Time within 5°C of actual peak
Temperature (tp) 20 – 40 seconds
Ramp-down Rate 5°C/second max
Time 25°C to peak Temperature (TP) 8 minutes Max.
Do not exceed 260°C
0
50
100
150
200
250
300
00.5 11.5 22.5 33.5 4
TIME(MINUTE
S)
TEMPERATURE (ºC)
Maximum Wave 240C
Lead–free Profile
0
50
100
150
200
250
300
00.5 11.5 22.5 33.5 4
TIME(MINUTES)
TEMPERATURE (ºC)
Maximum Wave 260C
Non Lead–free Profile
Wave Solder Profile
Operating/Storage
Temperature -55°C to +125°C / -55°C to +150°C
Humidity Aging +85°C, 85% RH, 1000 hours
+/-10% Voltage
Thermal Shock +85°C to -40°C 10 times
+/-10% Voltage
Solvent Resistance MIL–STD–202, Method 215
Moisture Sensitivity Level 1, J-STD-020
Lead Material Tin–Coated
Soldering
Characteristics
Solderability per MIL–STD–202,
Method 208
Insulating Material Cured, flame retardant epoxy polymer
meets UL94V–0 requirements.
Device Labeling Marked with LF, voltage, amperage rating,
and date code.
Physical Specifications
Environmental Specifications
Figure 16
Figure 17
© 2017 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 09/14/17
Metal-Oxide Varistors (MOVs)
Low Profile / Application Specific Varistors > RA Series
Product Dimensions (mm)
D MAX
Y
n
MIN A MAX
SEATING
PLANE
5.0 MIN
(0.197 MIN)
Øb
±0.05
( 0.002)
E
MAX
e
1.0
( 0.039)
0.5 MAX
OFFSET
(0.020 MAX)
X
Z MIN
SYMBOL RA8
Series
RA16
Series
RA22
Series
A (max.) 8.85
(0.348)
15.1
(0.594)
19.1
(0.752)
D (max.) 11.45
(0.450)
19.7
(0.776)
25.5
(1.004)
e ± 1 5
(0.197)
7. 5
(0.295)
7. 5
(0.295)
E (max.) 5.2
(0.205)
6.3
(0.248)
6.3
(0.248)
n (max.) 0.7
(0.027)
0.7
(0.027)
0.7
(0.027)
Øb ± 0.05 0.635
(0.025)
0.81
(0.032)
0.81
(0.032)
Weight
(typical) 1 Gram 3.4 Grams 4.4 Grams
X2.2
(0.087)
2.2
(0.087)
4.4
(0.173)
Y (Typ.)
3.1 -/+ 0.5
(0.122 -/+
0.02)
6 -/+ 1
(0.236 -/+
0.04)
8.9 -/+ 1
(0.35 -/+ 0.04)
Z (min.) 0.4
(0.015)
0.8
(0.031)
0.8
(0.031)
NOTES: Dimensions are in mm, with dimensions in inches in parentheses.
Inches for reference only.
Part Numbering System
The RA Series is supplied in bulk pack.
V200 RA 16
Device Size
Littelfuse
Varistor
Series Designator
Nominal
Varistor Voltage
OPTIONAL SUFFIX:
X2749: Lead-Free and
RoHS Compliant Option
X2749
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