NTC Inrush Current Limiters
Thermistors
NF 08 - 10 - 13 - 15 - 20
(For more details see also the catalog dedicated to this range)
OUTLINE DRAWINGS
D
3mm max.
H
H1
e
Notes
millimeters (inches)
H1
I
LS
d
Straight leads
(Suffix - - or HB)
Internal kink
(Suffix HL or 1N)
Y kink
(Suffix HY or 2B)
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.
DIMENSIONS
Type
NF08*
NF08
NF10*
NF10
NF13
NF15
NF20
millimeters (inches)
D max
mm
9.5
9.5
11.5
11.5
15.0
17.0
22.0
(.374)
(.374)
(.453)
(.453)
(.591)
(.669)
(.866)
e max
mm
5.0 (.197)
5.0 (.197)
5.0 (.197)
5.0 (.197)
6.0 (.236)
6.0 (.236)
6. (.236)
H max
mm
13.0
13.0
15.0
15.0
18.0
20.0
25.0
(.512)
(.512)
(.591)
(.591)
(.709)
(.787)
(.984)
H1 max
mm
16.0
16.0
18.0
18.0
22.0
24.0
29.0
(.630)
(.630)
(.709)
(.709)
(.866)
(.945)
(1.142)
I min
mm
30
30
30
30
30
30
30
(1.181)
(1.181)
(1.181)
(1.181)
(1.181)
(1.181)
(1.181)
d
±0.02 mm
(±0.008)
0.6 (.024)
0.8 (.031)
0.6 (.024)
0.8 (.031)
0.8 (.031)
1.0 (.039)
1.0 (.039)
LS
±0.8 mm
(±0.030)
5.08 (.20)
7.62 (.03)
5.08 (.20)
7.62 (.30)
7.62 (.30)
7.62 (.30)
7.62 (.30)
GENERAL CHARACTERISTICS
Type
NF08*
NF08
NF10*
NF10
NF13
NF15
NF20
Standard
tolerance**
%
20
20
20
20
20
20
20
Maximum
operating
T°C
-40 / +200
-40 / +200
-40 / +200
-40 / +200
-40 / +200
-40 / +200
-40 / +200
Max power
25°C
Watts
1.6
2.2
2.0
2.6
3.2
4.1
5.0
Thermal
dissipation
δ
th
(mW/K)
8
11
10
13
16
20
25
Thermal time
constant
τ
C
(s)
60
60
75
75
100
115
160
Heat
capacity
H (mJ/K)
480
660
750
975
1600
2300
4000
Packing
bulk tape
√
√
√
√
√
√
√
-
√
√
√
√
√
-
√
-
* 0.6 mm copper wire and 5.08 mm leads spacing for those two types.
** Other tolerances available: L: ±15, X: ±25%
SUFFIXES FOR BULK PACKING
(Suffixes for taping: see page 35)
--
HB
HL
straight leads 0.8 or 1 mm wire diameter and 7.62 lead spacing
straight leads 0.6 mm wire diameter and 5.08 lead spacing
internal kink 0.8 mm or 1 mm wire diameter and 7.62 lead spacing
1N
HY
2B
internal kink 0.6 mm wire diameter and 5.08 lead spacing
Y kink 0.8 or 1 mm wire diameter and 7.62 lead spacing
Y kink 0.6 mm wire diameter and 5.08 lead spacing
HOW TO ORDER
NF13
AA
0509
M
--
Type
Inrush
Current
Limiters
Resistance
5 kΩ
Tolerance
M (±20%)
Suffix
Bulk, Straight Leads
(See illustration above)
29
Table of Values
NF 08 - 10 - 13 - 15 - 20
cUL
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
Ceramic
Disc
ø (mm)
08
Part number
reference
T
ype
NF08AA0509MHB
NF08AA0809MHB
NF08AA0100MHB
NF08AA0150MHB
NF08AA0330MHB
NF08AA0509M - -
NF08AA0809M - -
NF08AA0100M - -
NF08AA0150M - -
NF08AA0330M - -
NF10AA0259MHB
NF10AA0409MHB
NF10AA0509MHB
NF10AA0809MHB
NF10AA0100MHB
NF10AA0160MHB
NF10AA0200MHB
NF10AA0250MHB
NF10AA0500MHB
NF10AA0800MHB
NF10AA0121MHB
NF10AA0259M - -
NF10AA0409M - -
NF10AA0509M - -
NF10AA0809M - -
NF10AA0100M - -
NF10AA0160M - -
NF10AA0200M - -
NF10AA0250M - -
NF10AA0500M - -
NF10AA0800M - -
NF10AA0121M - -
NF13AA0259M - -
NF13AA0509M - -
NF13AA0709M - -
NF13AA0809M - -
NF13AA0100M - -
NF13AA0150M - -
NF13AA0220M - -
NF13AA0330M - -
NF13AA0400M - -
NF13AA0600M - -
NF15AA0139M - -
NF15AA0159M- -
NF15AA0259M - -
NF15AA0309M - -
NF15AA0409M - -
NF15AA0509M - -
NF15AA0609M - -
NF15AA0709M - -
NF15AA0809M - -
NF15AA0100M - -
NF15AA0120M - -
NF15AA0160M - -
NF15AA0200M - -
NF15AA0250M - -
NF15AA0330M - -
NF15AA0400M - -
NF15AA0470M - -
NF20AA0259M - -
NF20AA0409M - -
NF20AA0509M - -
NF20AA0100M - -
NF20AA0150M - -
NF20AA0330M - -
Zero power
resistance
R
25°C
(Ω)
5.0
8.0
10.0
15.0
33.0
5.0
8.0
10.0
15.0
33.0
2.5
4.0
5.0
8.0
10.0
16.0
20.0
25.0
50.0
80.0
120.0
2.5
4.0
5.0
8.0
10.0
16.0
20.0
25.0
50.0
80.0
120.0
2.5
5.0
7.0
8.0
10.0
15.0
22.0
33.0
40.0
60.0
1.3
1.5
2.5
3.0
4.0
5.0
6.0
7.0
8.0
10.0
12.0
16.0
20.0
25.0
33.0
40.0
47.0
2.5
4.0
5.0
10.0
15.0
33.0
Max steady
stade current
I
ss
max 25°C (A)
2.9
2.3
2.1
1.8
1.3
3.4
2.7
2.5
2.1
1.5
4.5
3.6
3.3
2.6
2.5
2.0
1.9
1.7
1.4
1.1
1.0
5.2
4.1
3.8
3.0
2.8
2.3
2.1
2.0
1.6
1.3
1.2
5.7
4.2
3.7
3.6
3.3
2.8
2.3
2.2
2.0
1.9
8.9
8.3
6.6
6.1
5.5
4.9
4.7
4.3
4.2
3.7
3.5
3.0
3.1
2.8
2.5
2.3
2.3
7.8
6.4
5.9
4.3
4.0
3.1
Resistance
at max current
R
iss
max (Ω)
0.20
0.30
0.37
0.50
0.97
0.20
0.30
0.37
0.50
0.97
0.10
0.16
0.19
0.30
0.34
0.50
0.59
0.69
1.07
1.60
1.90
0.10
0.16
0.19
0.30
0.34
0.50
0.59
0.69
1.07
1.60
1.90
0.10
0.19
0.24
0.25
0.30
0.41
0.61
0.70
0.80
0.95
0.05
0.06
0.09
0.11
0.13
0.17
0.19
0.22
0.24
0.30
0.33
0.44
0.43
0.53
0.66
0.80
0.74
0.08
0.13
0.15
0.28
0.32
0.52
08
10
10
13
15
20
* 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
30
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:
I
SSmax25
x 0.9 = 3.0 A.
3 – HOW TO CALCULATE THE
WORKING POINT OF NF
THERMISTOR AT A DIFFERENT
AMBIENT TEMPERATURE THAN
25°C?
Example: NF13AA0100M
I
SS
= 3 A, T
ambient
= T
A
= 60°C
•
R
T
I
SS
2
= (T-T
A
) and thus
T=
R
T
I
SS2
+ T
A
Derating of maximum steady state current with
ambient temperature
1.00
• As R
T
depends 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 R
T
+ 60
from the R
T
curve page 33 we find R
T
starting from T:
T (°C)
185
190
195
200
R
T
(Ω)
0.28
0.26
0.24
0.22
➾
562.5 R
T
+ 60 (°C)
217
206
195
184
Iss max (T) /Iss max (25°C) RATIO
0.80
Not recommended for permanent use
0.60
0.40
0.20
0.00
-40
-20
0
20
40
60
80
100 120 140 160 180 200 220
AMBIENT TEMPERATURE (°C)
The working temperature of this NF thermistor is about
195°C when operating under I
SS
= 3 A and T
A
= 60°C (this
temperature is the one for which we have T = 562.5 R
T
+
60).
Important:
A discrepancy may exist between practice and
theory due to the tolerance of the thermistor
(±20% usually).
2 – HOW TO CALCULATE THE
WORKING TEMPERATURE OF
NF THERMISTOR?
Example: NF08AA0330M
T
ambient
= 25°C
I
SS
= 0.2 A,
• From the graph V (I) page 32, we find V
SS
= 2.2 V there-
fore, R
SS
= 11
Ω
• From the graph R(T), page 32, at R = 11
Ω,
we find
T ± 65°C
31
NTC Inrush Current Limiters
Thermistors
Voltage-Current and Resistance-Temperature Characteristics
TYPICAL VOLTAGE/CURRENT
CHARACTERISTICS FOR TYPE NF08
10.000
1.6 W for the
suffix HB
2.2 W
1.000
33Ω
15Ω
10Ω
8Ω
5Ω
Voltage (V)
0.100
0.010
0.010
0.100
Current (A)
1.000
10.000
TYPICAL RESISTANCE/TEMPERATURE
CHARACTERISTICS FOR TYPE NF08
1000.00
100.00
Resistance (Ohm)
10.00
1.00
33Ω
15Ω
10Ω
8Ω
5Ω
0.10
-50
0
50
100
Temperature (
°C)
150
200
250
32
NTC Inrush Current Limiters
Thermistors
Voltage-Current and Resistance-Temperature Characteristics
TYPICAL VOLTAGE/CURRENT
CHARACTERISTICS FOR TYPE NF10
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 VOLTAGE/CURRENT
CHARACTERISTICS FOR TYPE NF13
10.000
3.2 W
60Ω
40Ω
33Ω
22Ω
15Ω
10Ω
8Ω
7Ω
5Ω
2.5Ω
1.000
1.000
Voltage (V)
0.100
Voltage (V)
0.100
0.010
0.010
0.010
0.010
0.100
Current (A)
1.000
10.000
0.100
Current (A)
1.000
10.000
TYPICAL RESISTANCE/TEMPERATURE
CHARACTERISTICS FOR TYPE NF10
10000.00
TYPICAL RESISTANCE/TEMPERATURE
CHARACTERISTICS FOR TYPE NF13
10000.00
1000.00
1000.00
100.00
Resistance (Ohm)
Resistance (Ohm)
100.00
10.00
120Ω
80Ω
50Ω
25Ω
20Ω
16Ω
10Ω
8Ω
5Ω
4Ω
2.5Ω
10.00
1.00
1.00
0.10
0.10
60Ω
40Ω
33Ω
22Ω
15Ω
10Ω
8Ω
7Ω
5Ω
2.5Ω
-50
0
50
100
Temperature (°C)
150
200
250
0.01
-50
0
50
100
Temperature (°C)
150
200
250
0.01
33
