Design and specifications are each subject to change without notice. Ask factory for the current technical specifications before purchase and/or use.
Should a safety concern arise regarding this product, please be sure to contact us immediately.
“ZNR” Transient/Surge Absorbers (Type CK)
E
1
R
2
Z
3 4 5 6 789 10 11 12
Element Size Type Design No.Nominal
Varistor Voltage
Tolerance
CCK
Product Code Series
Explanation of Part Numbers
Features
Recommended Applications
Related Standards
● UL and CSA recognized components
● High energy handling capability (210 to 750 joules)
● Large withstanding peak current (25 to 30 kA, 8/20 µs, 1 time)
● Common terminals for electrical connection and mounting
● RoHS compliant
● Power suppliers for OA, FA, telecommunication or industrial equipment
● Power strips
● Transient voltage surge suppressor units
Note : Ask our factory for Product Specification before use.
UL and CSA Recognized
“ZNR” Transient/Surge Absorbers with Tabs
Type : CK
ZNR Transient/Surge Absorber with Tabs is a heavy duty
type ZNR with very unique tab terminals which bring forth
a higher reliability.
These tabs are used as electrical connecting terminals
and also its mounting legs. This type of ZNR is meant for
applications in power supplies or transient voltage surge
suppressor units where large surge current or high surge
energy absorption is required.
■ As for Handling Precautions and Minimum Quantity / Packing Unit
Please see Related Information
● Each type designation is not registered by Part Num ber.
Please contact us for further questions regarding type designation.
Standard No. UL1449 CSA C22.2 No.1 Class 2221 01
Title Surge Protective Devices
Accessories and Parts for Electronic Products
(Varistor for Across-The-Line use as transient
protection on 120V ac nominal system)
Nov. 201804
Design and specifications are each subject to change without notice. Ask factory for the current technical specifications before purchase and/or use.
Should a safety concern arise regarding this product, please be sure to contact us immediately.
“ZNR” Transient/Surge Absorbers (Type CK)
T
D
18
25
77
8
dH
2-f 3.4
ZNR
Abbreviation of Part No.
Date code
● Operating Temperature Range : –40 to 85 °C ● Storage Temperature Range : –40 to 125 °C
Part No.
(UL/CSA Recognized) Type Designation
Varistor
Voltage
Maximum
Allowable
Voltage
Maximum
Clamping
Voltage
Energy
(2 ms,
1 time)
Maximum
Peak Current
(8/20 µs)
1 time 2 times
V1 mA (V) ACrms (V) DC (V) VXA (V) Ip (A) (J) (kA) (kA)
ERZC32CK201W 32K201U
200 (185 to 225)
130 170 340 200 210 25 20
ERZC32CK241W 32K241U
240 (216 to 264)
150 200 395 200 240 25 20
ERZC32CK271W 32K271U
270 (247 to 303)
175 225 455 200 255 25 20
ERZC32CK361W 32K361U
360 (324 to 396)
230 300 595 200 325 25 20
ERZC32CK391W 32K391U
390 (351 to 429)
250 320 650 200 350 25 20
ERZC32CK431W 32K431U
430 (387 to 473)
275 350 710 200 400 25 20
ERZC32CK471W 32K471U
470 (423 to 517)
300 385 775 200 405 25 20
ERZC32CK511W 32K511U
510 (459 to 561)
320 415 845 200 405 25 20
ERZC32CK621W 32K621U
620 (558 to 682)
385 505 1025 200 415 25 20
ERZC32CK681W 32K681U
680 (612 to 748)
420 560 1120 200 450 25 20
ERZC32CK751W 32K751U
750 (645 to 825)
460 615 1240 200 500 25 20
ERZC32CK781W 32K781U
780 (702 to 858)
485 640 1290 200 520 25 20
ERZC32CK821W 32K821U
820 (738 to 902)
510 670 1355 200 545 25 20
ERZC32CK911W 32K911U
910 (819 to 1001)
550 745 1500 200 600 25 20
ERZC32CK951W 32K951U
950 (855 to 1045)
575 765 1570 200 600 25 20
ERZC40CK201W 40K201U
200 (185 to 225)
130 170 340 250 260 30 25
ERZC40CK241W 40K241U
240 (216 to 264)
150 200 395 250 300 30 25
ERZC40CK271W 40K271U
270 (247 to 303)
175 225 455 250 340 30 25
ERZC40CK361W 40K361U
360 (324 to 396)
230 300 595 250 405 30 25
ERZC40CK391W 40K391U
390 (351 to 429)
250 320 650 250 435 30 25
ERZC40CK431W 40K431U
430 (387 to 473)
275 350 710 250 500 30 25
ERZC40CK471W 40K471U
470 (423 to 517)
300 385 775 250 505 30 25
ERZC40CK511W 40K511U
510 (459 to 561)
320 415 845 250 505 30 25
ERZC40CK621W 40K621U
620 (558 to 682)
385 505 1025 250 515 30 25
ERZC40CK681W 40K681U
680 (612 to 748)
420 560 1120 250 560 30 25
ERZC40CK751W 40K751U
750 (645 to 825)
460 615 1240 250 625 30 25
ERZC40CK781W 40K781U
780 (702 to 858)
485 640 1290 250 650 30 25
ERZC40CK821W 40K821U
820 (738 to 902)
510 670 1355 250 680 30 25
ERZC40CK911W 40K911U
910 (819 to 1001)
550 745 1500 250 750 30 25
ERZC40CK951W 40K951U
950 (855 to 1045)
575 765 1570 250 750 30 25
Part No.
(UL/CSA Recognized)
Type Designation
D max. H max. T max. d
ERZC32CK201W 32K201U
36 46
7.5 5.7±1.0
ERZC32CK241W 32K241U 7.5 5.4±1.0
ERZC32CK271W 32K271U 8.5 5.2±1.0
ERZC32CK361W 32K361U 9.0 4.6±1.0
ERZC32CK391W 32K391U 9.0 4.4±1.0
ERZC32CK431W 32K431U 9.0 4.1±1.0
ERZC32CK471W 32K471U 9.7 3.9±1.0
ERZC32CK511W 32K511U 9.7 4.5±1.0
ERZC32CK621W 32K621U 9.7 3.9±1.0
ERZC32CK681W 32K681U 9.7 3.6±1.0
ERZC32CK751W 32K751U 10.5 3.3±1.0
ERZC32CK781W 32K781U 10.5 3.1±1.0
ERZC32CK821W 32K821U 10.5 2.9±1.0
ERZC32CK911W 32K911U 11.5 2.5±1.0
ERZC32CK951W 32K951U 11.5 2.3±1.0
ERZC40CK201W 40K201U
44 55
7.5 5.7±1.0
ERZC40CK241W 40K241U 7.5 5.4±1.0
ERZC40CK271W 40K271U 8.5 5.2±1.0
ERZC40CK361W 40K361U 9.0 4.6±1.0
ERZC40CK391W 40K391U 9.0 4.4±1.0
ERZC40CK431W 40K431U 9.0 4.1±1.0
ERZC40CK471W 40K471U 9.7 3.9±1.0
ERZC40CK511W 40K511U 9.7 4.5±1.0
ERZC40CK621W 40K621U 9.7 3.9±1.0
ERZC40CK681W 40K681U 9.7 3.6±1.0
ERZC40CK751W 40K751U 10.5 3.3±1.0
ERZC40CK781W 40K781U 10.5 3.1±1.0
ERZC40CK821W 40K821U 10.5 2.9±1.0
ERZC40CK911W 40K911U 11.5 2.5±1.0
ERZC40CK951W 40K951U 11.5 2.3±1.0
Ratings and Characteristics
Dimensions in mm (not to scale)
Nov. 201804
Design and specifications are each subject to change without notice. Ask factory for the current technical specifications before purchase and/or use.
Should a safety concern arise regarding this product, please be sure to contact us immediately.
“ZNR” Transient/Surge Absorbers (Type CK)
Current (A)
6000
4000
2000
1000
800
600
400
200
100
80
60
10-610-510-410-310-210-1100101102103104105
Voltage (V)
Test Current Waveform
10-6 to 10-3 A: Direct Current
10-1 to 104 A: 8/20 µs
Max. Clamping Voltage
Max. Leakage Current
ERZC32CK951W
ERZC32CK911W
ERZC32CK821W
ERZC32CK751W
ERZC32CK681W
ERZC32CK621W
ERZC32CK271W
ERZC32CK241W
ERZC32CK201W
ERZC32CK511W
ERZC32CK471W
ERZC32CK431W
ERZC32CK391W
ERZC32CK361W
ERZC32CK951W
ERZC32CK911W
ERZC32CK821W
ERZC32CK751W
ERZC32CK681W
ERZC32CK621W
ERZC32CK511W
ERZC32CK471W
ERZC32CK431W
ERZC32CK391W
ERZC32CK361W
ERZC32CK271W
ERZC32CK241W
ERZC32CK201W
Current (A)
6000
4000
2000
1000
800
600
400
200
100
80
60
10-610-510-410-310-210-1100101102103104105
Voltage (V)
Test Current Waveform
10-6 to 10-3 A: Direct Current
10-1 to 104 A: 8/20 µs
Max. Clamping Voltage
Max. Leakage Current
ERZC40CK951W
ERZC40CK911W
ERZC40CK821W
ERZC40CK751W
ERZC40CK681W
ERZC40CK621W
ERZC40CK271W
ERZC40CK241W
ERZC40CK201W
ERZC40CK511W
ERZC40CK471W
ERZC40CK431W
ERZC40CK391W
ERZC40CK361W
ERZC40CK271W
ERZC40CK241W
ERZC40CK201W
ERZC40CK951W
ERZC40CK911W
ERZC40CK821W
ERZC40CK751W
ERZC40CK681W
ERZC40CK621W
ERZC40CK511W
ERZC40CK471W
ERZC40CK431W
ERZC40CK391W
ERZC40CK361W
Typical Characteristics
(ERZC40CK201W to ERZC40CK951W)
Voltage vs. Current (ERZC32CK201W to ERZC32CK951W)
Nov. 201804
Design and specifications are each subject to change without notice. Ask factory for the current technical specifications before purchase and/or use.
Should a safety concern arise regarding this product, please be sure to contact us immediately.
“ZNR” Transient/Surge Absorbers (Type CK)
UL, CSA Rec og nized Components and The A.C. Rated Voltage
Part No.
(UL/CSA Recognized)
Maximum Allowable Voltage Rated Voltage (Vrms)
ACrms (V) DC (V) UL1449 CSA (Class 2221 01)
ERZC32CK201W 130 170 118 118
ERZC32CK241W 150 200 136 136
ERZC32CK271W 175 225 159 159
ERZC32CK361W 230 300 209 209
ERZC32CK391W 250 320 227 227
ERZC32CK431W 275 350 250 250
ERZC32CK471W 300 385 272 272
ERZC32CK511W 320 415 291 291
ERZC32CK621W 385 505 350 350
ERZC32CK681W 420 560 381 381
ERZC32CK751W 460 615 418 418
ERZC32CK781W 485 640 440 440
ERZC32CK821W 510 670 463 463
ERZC32CK911W 550 745 500 500
ERZC32CK951W 575 765 522 522
ERZC40CK201W 130 170 118 118
ERZC40CK241W 150 200 136 136
ERZC40CK271W 175 225 159 159
ERZC40CK361W 230 300 209 209
ERZC40CK391W 250 320 227 227
ERZC40CK431W 275 350 250 250
ERZC40CK471W 300 385 272 272
ERZC40CK511W 320 415 291 291
ERZC40CK621W 385 505 350 350
ERZC40CK681W 420 560 381 381
ERZC40CK751W 460 615 418 418
ERZC40CK781W 485 640 440 440
ERZC40CK821W 510 670 463 463
ERZC40CK911W 550 745 500 500
ERZC40CK951W 575 765 522 522
Nov. 201804
Design and specifications are each subject to change without notice. Ask factory for the current technical specifications before purchase and/or use.
Should a safety concern arise regarding this product, please be sure to contact us immediately.
“ZNR” Transient/Surge Absorbers (Type CK)
Characteristics Test Methods/Description Specifications
Standard Test Condition Electrical characteristics shall be measured at following conditions
(Temperature: 5 to 35 °C, Humidity: Max. 85 %). ———
Electrical
Varistor Voltage
The voltage between two terminals with the specified measuring
current 1mA DC applied is called V1 or V1mA. The measurement
shall be made as fast as possible to avoid heat affection.
To meet the
specified value.
Maximum Allowable
Voltage
The maximum sinusoidal wave voltage (rms) or the maximum DC
voltage that can be applied continuously.
Clamping Voltage The maximum voltage between two terminals with the specified
standard impulse current (8/20 µs).
Rated Power The maximum power that can be applied within the specified
ambient temperature.
Energy The maximum energy within the varistor voltage change of ±10 %
when one impulse of 2 ms is applied.
Maximum
Peak
Current
2 times
The maximum current within the varistor voltage change of
±10 % with the standard impulse current (8/20 µs) applied
two times with an interval of 5 minutes.
1 time
The maximum current within the varistor voltage change of ±10 %
with the standard impulse current (8/20 µs) applied one time.
Mechanical
Robustness of
Terminations
(Tensile)
After gradually applying the force of 19.6 N (2 kgf) and keeping
the unit fi xed for ten seconds, the terminal shall be visually
examined for any damage.
No remarkable
damage
Vibration
After repeatedly applying a single harmonic vibration (amplitude:
0.35 mm): double amplitude: 0.7 mm with 1 minute vibration
frequency cycles (10 Hz to 55 Hz to 10 Hz) to each of three
perpendicular directions for 2 hours. Thereafter, the unit shall be
visually examined.
No remarkable
damage
Solderability
After dipping the terminal to a depth of approximately 3 mm from
the body in a soldering bath of 230±5 °C for 5.0±0.5 seconds,
the terminal shall be visually examined.
Approximately 95 %
of the terminals shall
be covered with new
solder uniformly.
Resistance to
Soldering Heat
The terminal shall be dipped into a soldering bath having a
temperature of 350±10 °C to a point 4.0±0.8 mm from the body
of the unit and then be held there for 3.0±0.5 seconds. The
change of Vc and mechanical damage shall be examined.
ΔV1mA/V1mA < ± 5 %
No remarkable
damage
Environmental
Dry Heat/ High
Temperature
Storage
The specimen shall be subjected to 125±2 °C for 500 hours in a
thermostatic bath without load and then stored at room temperature
and humidity for one to two hours. Thereafter, the change of Vc
shall be measured.
ΔV1mA/V1mA < ± 5 %
Damp Heat/
Humidity
(Steady State)
The specimen shall be subjected to 40±2 °C, 90 to 95 %RH for
1000 hours without load and then stored at room temperature
and humidity for one to two hours. Thereafter, the change of Vc
shall be measured.
Temperature Cycle
The temperature cycle shown below shall be repeated five
times and then stored at room temperature and humidity for
one to two hours. The change of Vc and mechanical damage
shall be examined.
Step Temperature (°C) Period (minutes)
1–25±3 30
+3
2 Room Temp. 3 max.
3 85±2 30
+3
4 Room Temp. 3 max.
ΔV1mA/V1mA < ± 5 %
No remarkable
damage
Dry Heat Load/
High Temperature
Load
After being continuously applied the Maximum Allowable Voltage
at 85±2 °C for 500 hours, the specimen shall be stored at room
temperature and humidity for one to two hours. Thereafter, the
change of Vc shall be measured.
ΔV1mA/V1mA < ± 10 %
0
0
Performance Characteristics (Type CK)
Nov. 201804
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