29
NTC Inrush Current Limiters
Thermistors
NF 08 - 10 - 13 - 15 - 20
DIMENSIONS millimeters (inches)
D max e max H max H1 max I min dLS
Type mm mm mm mm mm ±0.02 mm ±0.8 mm
(±0.008) (±0.030)
NF08* 9.5 (.374) 5.0 (.197) 13.0 (.512) 16.0 (.630) 30 (1.181) 0.6 (.024) 5.08 (.20)
NF08 9.5 (.374) 5.0 (.197) 13.0 (.512) 16.0 (.630) 30 (1.181) 0.8 (.031) 7.62 (.03)
NF10* 11.5 (.453) 5.0 (.197) 15.0 (.591) 18.0 (.709) 30 (1.181) 0.6 (.024) 5.08 (.20)
NF10 11.5 (.453) 5.0 (.197) 15.0 (.591) 18.0 (.709) 30 (1.181) 0.8 (.031) 7.62 (.30)
NF13 15.0 (.591) 6.0 (.236) 18.0 (.709) 22.0 (.866) 30 (1.181) 0.8 (.031) 7.62 (.30)
NF15 17.0 (.669) 6.0 (.236) 20.0 (.787) 24.0 (.945) 30 (1.181) 1.0 (.039) 7.62 (.30)
NF20 22.0 (.866) 6. (.236) 25.0 (.984) 29.0 (1.142) 30 (1.181) 1.0 (.039) 7.62 (.30)
GENERAL CHARACTERISTICS
Standard Maximum Max power Thermal Thermal time Heat Packing
Type tolerance** operating 25°C dissipation constant capacity bulk tape
% T°C Watts δth (mW/K) τC(s) H (mJ/K) √√
NF08* 20 -40 / +200 1.6 8 60 480 √√
NF08 20 -40 / +200 2.2 11 60 660 √√
NF10* 20 -40 / +200 2.0 10 75 750 √-
NF10 20 -40 / +200 2.6 13 75 975 √√
NF13 20 -40 / +200 3.2 16 100 1600 √√
NF15 20 -40 / +200 4.1 20 115 2300 √-
NF20 20 -40 / +200 5.0 25 160 4000 √-
(For more details see also the catalog dedicated to this range)
OUTLINE DRAWINGS millimeters (inches)
De
H
I
3mm max.
d
LS
H1
Notes
H1
* 0.6 mm copper wire and 5.08 mm leads spacing for those two types.
** Other tolerances available: L: ±15, X: ±25%
Notes: In case of adding strength to the lead wire from the side, it may occur crack and fragment at a part of pant leg.
* 0.6 mm copper wire and 5.08 mm leads spacing for those two types.
Straight leads
(Suffix - - or HB)
Internal kink
(Suffix HL or 1N)
Y kink
(Suffix HY or 2B)
HOW TO ORDER
NF13
Type
AA
Inrush
Current
Limiters
0509
Resistance
5 kΩ
M
Tolerance
M (±20%)
--
Suffix
Bulk, Straight Leads
(See illustration above)
SUFFIXES FOR BULK PACKING (Suffixes for taping: see page 35)
- - straight leads 0.8 or 1 mm wire diameter and 7.62 lead spacing
HB straight leads 0.6 mm wire diameter and 5.08 lead spacing
HL internal kink 0.8 mm or 1 mm wire diameter and 7.62 lead spacing
1N internal kink 0.6 mm wire diameter and 5.08 lead spacing
HY Y kink 0.8 or 1 mm wire diameter and 7.62 lead spacing
2B Y kink 0.6 mm wire diameter and 5.08 lead spacing
30
Table of Values
NF 08 - 10 - 13 - 15 - 20
Ceramic Part number Zero power Max steady Resistance
cUL Disc reference resistance stade current at max current
ø (mm) Type R25°C (Ω)I
ss max 25°C (A) Riss max (Ω)
* 08 NF08AA0509MHB 5.0 2.9 0.20
* NF08AA0809MHB 8.0 2.3 0.30
* NF08AA0100MHB 10.0 2.1 0.37
* NF08AA0150MHB 15.0 1.8 0.50
* NF08AA0330MHB 33.0 1.3 0.97
* 08 NF08AA0509M - - 5.0 3.4 0.20
* NF08AA0809M - - 8.0 2.7 0.30
* NF08AA0100M - - 10.0 2.5 0.37
* NF08AA0150M - - 15.0 2.1 0.50
* NF08AA0330M - - 33.0 1.5 0.97
* 10 NF10AA0259MHB 2.5 4.5 0.10
* NF10AA0409MHB 4.0 3.6 0.16
* NF10AA0509MHB 5.0 3.3 0.19
* NF10AA0809MHB 8.0 2.6 0.30
* NF10AA0100MHB 10.0 2.5 0.34
* NF10AA0160MHB 16.0 2.0 0.50
* NF10AA0200MHB 20.0 1.9 0.59
* NF10AA0250MHB 25.0 1.7 0.69
* NF10AA0500MHB 50.0 1.4 1.07
* NF10AA0800MHB 80.0 1.1 1.60
* NF10AA0121MHB 120.0 1.0 1.90
* 10 NF10AA0259M - - 2.5 5.2 0.10
* NF10AA0409M - - 4.0 4.1 0.16
* NF10AA0509M - - 5.0 3.8 0.19
* NF10AA0809M - - 8.0 3.0 0.30
* NF10AA0100M - - 10.0 2.8 0.34
* NF10AA0160M - - 16.0 2.3 0.50
* NF10AA0200M - - 20.0 2.1 0.59
* NF10AA0250M - - 25.0 2.0 0.69
* NF10AA0500M - - 50.0 1.6 1.07
* NF10AA0800M - - 80.0 1.3 1.60
* NF10AA0121M - - 120.0 1.2 1.90
* 13 NF13AA0259M - - 2.5 5.7 0.10
* NF13AA0509M - - 5.0 4.2 0.19
* NF13AA0709M - - 7.0 3.7 0.24
* NF13AA0809M - - 8.0 3.6 0.25
* NF13AA0100M - - 10.0 3.3 0.30
* NF13AA0150M - - 15.0 2.8 0.41
* NF13AA0220M - - 22.0 2.3 0.61
* NF13AA0330M - - 33.0 2.2 0.70
* NF13AA0400M - - 40.0 2.0 0.80
* NF13AA0600M - - 60.0 1.9 0.95
* 15 NF15AA0139M - - 1.3 8.9 0.05
* NF15AA0159M- - 1.5 8.3 0.06
* NF15AA0259M - - 2.5 6.6 0.09
* NF15AA0309M - - 3.0 6.1 0.11
* NF15AA0409M - - 4.0 5.5 0.13
* NF15AA0509M - - 5.0 4.9 0.17
* NF15AA0609M - - 6.0 4.7 0.19
* NF15AA0709M - - 7.0 4.3 0.22
* NF15AA0809M - - 8.0 4.2 0.24
* NF15AA0100M - - 10.0 3.7 0.30
* NF15AA0120M - - 12.0 3.5 0.33
* NF15AA0160M - - 16.0 3.0 0.44
* NF15AA0200M - - 20.0 3.1 0.43
* NF15AA0250M - - 25.0 2.8 0.53
* NF15AA0330M - - 33.0 2.5 0.66
* NF15AA0400M - - 40.0 2.3 0.80
* NF15AA0470M - - 47.0 2.3 0.74
* 20 NF20AA0259M - - 2.5 7.8 0.08
* NF20AA0409M - - 4.0 6.4 0.13
* NF20AA0509M - - 5.0 5.9 0.15
* NF20AA0100M - - 10.0 4.3 0.28
* NF20AA0150M - - 15.0 4.0 0.32
* NF20AA0330M - - 33.0 3.1 0.52
* cL/L approval (File E167822)
.• Electrical performances for suffixes HL and HY are identical to the suffix - -.
• Electrical performances for suffixes 1N and 2B are identical to the suffix HB
31
NTC Inrush Current Limiters
Thermistors
Application Guide
1 – HOW TO DETERMINE THE
MAXIMUM STEADY STATE
CURRENT OF NF THERMISTORS?
• If the ambient temperature is 25°C:
the current is given in table page 30.
• If the ambient temperature is different from 25°C:
the current at 25°C must be derated as specified in the
graph below.
Example: maximum steady state current of
NF13AA0100M at 60°C ambient:
ISSmax25 x 0.9 = 3.0 A.
Derating of maximum steady state current with
ambient temperature
2 – HOW TO CALCULATE THE
WORKING TEMPERATURE OF
NF THERMISTOR?
Example: NF08AA0330M
ISS = 0.2 A, Tambient = 25°C
• From the graph V (I) page 32, we find VSS = 2.2 V there-
fore, RSS = 11 Ω
• From the graph R(T), page 32, at R = 11 Ω, we find
T ± 65°C
3 – HOW TO CALCULATE THE
WORKING POINT OF NF
THERMISTOR AT A DIFFERENT
AMBIENT TEMPERATURE THAN
25°C?
Example: NF13AA0100M
ISS = 3 A, Tambient = TA= 60°C
•RTISS2= (T-TA) and thus
RTISS2
T = + TA
• As RTdepends on T, this equation is quite complex to be
solved by an algebraic way. The quickest manner to solve
it is to operate by iterations:
for NF13, = 16 mW/K (see page 29)
therefore, the equation becomes:
T = 562.5 RT+ 60
from the RTcurve page 33 we find RTstarting from T:
T (°C) RT(Ω)➾562.5 RT+ 60 (°C)
185 0.28 217
190 0.26 206
195 0.24 195
200 0.22 184
The working temperature of this NF thermistor is about
195°C when operating under ISS = 3 A and TA= 60°C (this
temperature is the one for which we have T = 562.5 RT+
60).
Important: A discrepancy may exist between practice and
theory due to the tolerance of the thermistor
(±20% usually).
1.00
0.80
0.60
0.40
0.20
0.00
-40 -20 0 20 40 60 80
AMBIENT TEMPERATURE (°C)
Iss max (T) /Iss max (25°C) RATIO
100 120 140 160 180 200 220
Not recommended for permanent use
32
NTC Inrush Current Limiters
Thermistors
Voltage-Current and Resistance-Temperature Characteristics
TYPICAL VOLTAGE/CURRENT
CHARACTERISTICS FOR TYPE NF08
10.000
1.000
0.100
0.010
0.010 0.100 1.000
Current (A)
Voltage (V)
10.000
1.6 W for the
suffix HB 2.2 W
33Ω
15Ω
10Ω
8Ω
5Ω
TYPICAL RESISTANCE/TEMPERATURE
CHARACTERISTICS FOR TYPE NF08
Resistance (Ohm)
1000.00
100.00
10.00
1.00
0.10
-50 0 100 20050 150
Temperature ( °C)
250
33Ω
15Ω
10Ω
8Ω
5Ω
33
10.000
1.000
0.100
0.010
0.010 0.100 1.000
Current (A)
Voltage (V)
10.000
2.0 W for the
suffix HB 2.6 W 120Ω
80Ω
50Ω
25Ω
20Ω
16Ω
10Ω
8Ω
5Ω
4Ω
2.5Ω
TYPICAL RESISTANCE/TEMPERATURE
CHARACTERISTICS FOR TYPE NF10
Resistance (Ohm)
10000.00
1000.00
100.00
10.00
1.00
0.10
0.01
-50 0 100 20050 150
Temperature (°C)
250
120Ω
80Ω
50Ω
25Ω
20Ω
16Ω
10Ω
8Ω
5Ω
4Ω
2.5Ω
NTC Inrush Current Limiters
Thermistors
Voltage-Current and Resistance-Temperature Characteristics
TYPICAL VOLTAGE/CURRENT
CHARACTERISTICS FOR TYPE NF10
10.000
1.000
0.100
0.010
0.010 0.100 1.000
Current (A)
Voltage (V)
10.000
3.2 W
60Ω
40Ω
33Ω
22Ω
15Ω
10Ω
8Ω
7Ω
5Ω
2.5Ω
TYPICAL RESISTANCE/TEMPERATURE
CHARACTERISTICS FOR TYPE NF13
Resistance (Ohm)
10000.00
1000.00
100.00
10.00
1.00
0.10
0.01
-50 0 100 20050 150
Temperature (°C)
250
60Ω
40Ω
33Ω
22Ω
15Ω
10Ω
8Ω
7Ω
5Ω
2.5Ω
TYPICAL VOLTAGE/CURRENT
CHARACTERISTICS FOR TYPE NF13
34
10.000
1.000
0.100
0.010
0.010 0.100 1.000
Current (A)
Voltage (V)
10.000
4.1 W 47Ω
40Ω
33Ω
25Ω
20Ω
16Ω
12Ω
10Ω
8Ω
7Ω
6Ω
5Ω
4Ω
3Ω
2.5Ω
1.5Ω
1.3Ω
TYPICAL RESISTANCE/TEMPERATURE
CHARACTERISTICS FOR TYPE NF15
10.000
1.000
0.100
0.010
0.0100.1001.000
Current (A)
Voltage (V)
10.000100.000
5.0 W
33
15
10
5
4
2.5
NTC Inrush Current Limiters
Thermistors
Voltage-Current and Resistance-Temperature Characteristics
TYPICAL VOLTAGE/CURRENT
CHARACTERISTICS FOR TYPE NF15
Resistance (Ohm)
10000.00
1000.00
100.00
10.00
1.00
0.10
0.01
-50 0 100 20050 150
Temperature (°C)
250
47Ω
40Ω
33Ω
25Ω
20Ω
16Ω
12Ω
10Ω
8Ω
7Ω
6Ω
5Ω
4Ω
3Ω
2.5Ω
1.5Ω
1.3Ω
TYPICAL RESISTANCE/TEMPERATURE
CHARACTERISTICS FOR TYPE NF20
Resistance (Ohm)
1000.00
100.00
10.00
1.00
0.10
0.01
-500100200 50150
Temperature ( C)
250
33
15
10
5
4
2.5
TYPICAL VOLTAGE/CURRENT
CHARACTERISTICS FOR TYPE NF20
35
Packaging for Automatic Insertion
NTC Disc Thermistors / NF Series
PACKAGING AND KINK SUFFIXES
The following types can be ordered on tape either in
AMMOPACK (fan folder) or on REEL in accordance with IEC
286-2.
Types NF08
Leads Straight Internal Kink “Y” Kink
Packaging AMMOPACK REEL AMMOPACK REEL AMMOPACK REEL
Ho = 16 DA DB DQ DR D7 D5
Ho = 19.5 DC DD DS DT D8 D6
De
H
I
3mm max.
d
LS
H1
Notes
H1
0.6 (.024)
5.08 (0.20)
Types NF08 / 10 / 13
Leads Straight Internal Kink “Y” Kink
Packaging AMMOPACK REEL AMMOPACK REEL AMMOPACK REEL
Ho = 16 EA EN EC EF EQ ER
Ho = 19.5 EB ED
De
H
I
3mm max.
d
LS
H1
0.8 (0.31)
Notes
7.62 (0.30)
H1
PACKAGING QUANTITIES
Type AMMOPACK REEL BULK
NF08* (5.08) 1000 1000 450
NF08 (7.62) 750 750
NF10* (5.08) 450
NF10 (7.62) 750 750
NF13 (7.62) 750 750 400
NF15 (7.62) – – 250
NF20 (7.62) – – 150
DIMENSIONS:
millimeters (inches)
DIMENSIONS:
millimeters (inches)
