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Disc Type NTC Thermistors
Type: ERTD
NTC Thermistors (Disc Type)
The “Type ERTD” are disc type negative temperature
coefficient thermistors. Resistances are available
from 8 to 150 kand B Values are from 3000 K to
5000 K.
The thermistors are designed for temperature detection
and temperature compensation, featuring excellent
electrical and thermal stability.
Features
Wide selection of temperature coefficients
Excellent electrical and thermal stability
Handling Precautions
See Page 200
Recommended Applications
Temperature detection
Temperature compensation for measuring
instruments
Temperature compensation for deflection coil in TV
Explanation of Part Numbers
1 2 3 4 5 6 7 8 9 10 11 12
-46,
Product Code
ERT NTC Thermistors
Disc Dim
2 B5.0 mm
3 B7.5 mm
Lead Style
F Straight Lead
Z ÒZÓ Crimped Lead
Shape
D Disc Type
Center B Value (K)
E 2501Ð3000
F 3001Ð3500
G 3501Ð4000
H 4001Ð4500
I 4501Ð5000
Resistance
Tolerance
J ± 5%
K ±10 %
L ±15 %
Resistance R25 ()
The first two digits
are significant figures
of resistance and the
third one denotes
number of zeros
following them.
Decimal point is ex-
pressed by R as 1.4
=1R4.
Option
S Standard
T Taping Type
Derating Curve for the NTC Thermistor
For the NTC Thermistor operated in ambient
temperatures above 25 ˚C, power rating shall be
derated in accordance with the figure on the right.
120
100
80
60
40
20
0
Ð20
0 20 25 40 60 80 100 120125
Ambient Temperature (¡C)
DSheosiuglnd aansdafsepteyccifoincacetironnasraisree ereagcahrsduinbgjetcht itsopcrhoadnugcet,wpiltehaosuetbneostuicree. tAosckonfatacctotruysfiomr mtheedciautrerleyn.t technical specifications before purchase and/or use. Mar. 2005

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NTC Thermistors (Disc Type)
Ratings and Characteristics
Part No.
Zero-Power
Resistance
at 25 °C()
B Value✽✽
(K)
Maximum
Permissible
Power(W)
Heat
Dissipation
Constant
(mW/°C)
Thermal Time Resistance
Constant
Ratio
(s) R25/R50
Table
A/B
Curve No.
ERTD2FEL200S
20
ERTD2FFL400S
40
ERTD2FGL750S
75
ERTD2FFL101S
100
ERTD2FGL101S
100
ERTD2FGL171S
170
ERTD2FFL251S
250
ERTD2FGL251S
250
ERTD2FGL301S
300
ERTD2FFL351S
350
ERTD2FGL601S
600
ERTD2FGL801S
800
ERTD2FGL102S
1000
ERTD2FGL142S
1400
ERTD2FGL202S
2000
ERTD2FGL332S
3300
ERTD2FHL462S
4600
ERTD2FHL802S
8000
ERTD2FHL103S
10000
ERTD2FHL153S
15000
ERTD2FHL333S
33000
ERTD2FHL503S
50000
ERTD2FIL154S
150000
ERTD3FEL8R0S
8
ERTD3FFL130S
13
ERTD3FFL160S
16
ERTD3FFL200S
20
ERTD3FFL300S
30
ERTD3FFL400S
40
ERTD3FGL750S
75
ERTD3FGL800S
80
ERTD3FGL131S
130
ERTD3FGL501S
500
ERTD3FHL402S
4000
ERTD3FHL203S
20000
ERTD3FIL803S
80000
Resistance Tolerance Code
JK
±5 %
±10 %
3000
3200
3700
3500
3700
3700
3500
3900
3900
3500
4000
3900
3700
3900
4000
4000
4100
4100
4100
4200
4500
4500
4800
3000
3200
3200
3200
3200
3200
3700
3700
3700
4000
4100
4500
5000
0.4
0.6
L
±15 %
✽✽Tolerance of “B value”: ±10 %
B=
kn (R25/R50)
1/298.15–1/323.15
R25=Resistance at 25.0 °C
R50=Resistance at 50.0 °C
2.18 —
2.30 —
2.62 1
2.48 —
2.62 2
2.62 3
2.48 —
2.76 4
2.76 —
2.48 5
2.83 6
4.5 20 2.76 7
2.61 —
2.76 —
2.83 8
2.83 9
2.90 —
2.90 10
2.90 —
2.98 11
3.22 12
3.22 13
3.48 14
2.18 15
2.30 16
2.30 —
2.30 —
2.30 —
2.30 —
7.0 27 2.62 —
2.62 —
2.62 —
2.83 —
2.90 —
3.22 —
3.70 17
Operating Temperature Range: –30 to +125 °C
DSheosiuglnd aansdafsepteyccifoincacetironnasraisree ereagcahrsduinbgjetcht itsopcrhoadnugcet,wpiltehaosuetbneostuicree. tAosckonfatacctotruysfiomr mtheedciautrerleyn.t technical specifications before purchase and/or use. Mar. 2005

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Dimensions in mm (not to scale)
Straight Lead Type
F Type
BD
3
2
1
k
7 max.
Bd
NTC Thermistors (Disc Type)
Crimped Lead Type
Z Type
Bd
BD h e
3
2
1
6 max.*
F Type
D2
D3
Z Type
D2
fD
5.0±0.5
7.5±0.5
T
1.3±0.5
1.4±0.5
k
30.0 min.
30.0 min.
W
2.5±1.0
5.0±1.0
fd
0.4
0.5
fD
5.0±0.5
T
1.3±0.5
u
3.0 max.
(nom.2.5)
e
4.5±1.0
h
6.0 max.
(nom.5.0)
W
5.0±1.0
fd
0.5
Resistance vs. Temperature (Table A)
1000000
100000
10000
1000
14 17 13
12
11
10
9
8
7
6
5
4
3
2
1
100 16
15
10
Voltage vs. Current (Table B)
100
13
11
10
8
4
3
1 15
0.1
0.1
1 10
DC Current (mA)
100
1000
1
0.1 2.4 2.6 2.8 3.0 3.2 3.4
125 100
50
Temperature (ûC)
25
3.6 3.8
1
T
(×10Ð3KÐ1)
0 Ð20
DSheosiuglnd aansdafsepteyccifoincacetironnasraisree ereagcahrsduinbgjetcht itsopcrhoadnugcet,wpiltehaosuetbneostuicree. tAosckonfatacctotruysfiomr mtheedciautrerleyn.t technical specifications before purchase and/or use. Mar. 2005

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Resistance Color Code
Color
Black
Brown
Red
Orange
Yellow
Green
Blue
Purple
Gray
White
Gold
Silver
Code
1(1st Digit)
0
1
2
3
4
5
6
7
8
9
Taping Dimensions in mm (not to scale)
Taping Type
2
2
B , B @
2 . 2
NTC Thermistors (Disc Type)
2(2nd Digit)
0
1
2
3
4
5
6
7
8
9
3(Multiplier)
100
101
102
103
104
105
106
107
108
109
10–1
10–2
oD oD
P 12.7±1.0
P0 12.7±0.3
P1 3.85±0.70
P2 6.35±1.30
fd 0.50±0.05
F 5.0±1.0
h 0±5.0
W 18.0+–01..50
W0 12.5 min.
W1 9.00+–00..5705
W2 3.0 max
H 21.0±2.0
H0 16.0±0.5
k 2.0 max.
fD0 4.0±0.3
t 0.5±0.2
DSheosiuglnd aansdafsepteyccifoincacetironnasraisree ereagcahrsduinbgjetcht itsopcrhoadnugcet,wpiltehaosuetbneostuicree. tAosckonfatacctotruysfiomr mtheedciautrerleyn.t technical specifications before purchase and/or use. Mar. 2005