238164063103 Vishay, 238164063103 Datasheet - Page 4

• Manufacturer Part Number: 238164063103
• Description: NTC THERMISTOR
• Manufacturer: Vishay
• Type: NTCr

Specifications of 238164063103

• Mounting Style: Through Hole
• Pin Count: 2
• Screening Level: Automotive
• Sensitivity Index: 3977K
• Resistance @ 25c: 10kohm
• Thermal Time Constant: 15s
• Percentage Of Resistance Tolerance @ 25c: ±5
• Accuracy: ±0.75
• Operating Temperature Min Deg. C: -40C
• Operating Temperature Max Deg. C: 125C
• Product Length (mm): 3.3mm
• Product Height (mm): 9mm
• Product Depth (mm): 3mm
• Thermistor Type: NTC
• Resistance: 10kohm
• Thermistor Tolerance: ± 5%
• Beta Value (k): 3977K
• Operating Temperature Range: -40°C To +125°C
• Thermistor Case Style: Radial Lead
• No. Of Pins: 2
• Length/height, External: 4mm
• External Depth: 3mm
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Compliant

Document Number: 29049
Revision: 12-Apr-05
R
These thermistors have a narrow tolerance on the B-value,
the result of which provides a very small tolerance on the
nominal resistance value over a wide temperature range. For
this reason the usual graphs of R = f(T) are replaced by
Resistance Values at Intermediate Temperatures Tables,
together with a formula to calculate the characteristics with a
high precision.
FORMULAE TO DETERMINE NOMINAL
RESISTANCE VALUES
The resistance values at intermediate temperatures, or the
operating temperature values, can be calculated using the
following interpolation laws
(extended “Steinhart and Hart”):
where:
Formulae numbered (1) and (2) are interchangeable with an
error of max. 0.005 °C in the range 25 °C to 125 °C and
max. 0.015 °C in the range −40 °C to +25 °C
Notes
1. Temperature < 25 °C.
2. Temperature ≥25 °C.
T (R) = A
1
2
3
4
5
6
7
8
9
10
11
12
13
PARAMETERS FOR DETERMINING NOMINAL RESISTANCE VALUES
T
A, B, C, D, A
depending on the material concerned; see table below.
R
this event 25 °C).
T is the temperature in K.
ref
VALUE AND TOLERANCE
is the resistance value at a reference temperature (in
2880
2990
3041
3136
3390
3528
3528
3560
3740
3977
4090
4190
4370
4570
B
(K)
⎛
⎝
25/85
1
(1
(2
+
R (T)
B
mat O. with Bn = 2880K
mat P. with Bn = 3990K
mat Q. with Bn = 3041K
mat R. with Bn = 3136K
mat S. with Bn = 3390K
mat I. with Bn = 3528K
mat H. with Bn = 3560K
mat B. with Bn = 3740K
mat A. with Bn = 3977K
mat C. with Bn = 4090K
mat D. with Bn = 4190K
mat E. with Bn = 4370K
mat F. with Bn = 4570K
1
1
NAME
ln
, B
--------- -
R
=
1
R
ref
, C
R
ref
+
1
C
and D
×
1
e
ln
(
A
2
--------- -
R
+
R
1
B T ⁄ C T
ref
are constant values
+
+
D
TOL. B
VALU
1
⁄
0.75
0.75
E %
0.5
1.5
1.5
2.5
1.5
ln
3
3
3
3
3
2
2
3
For technical questions contact: [e-mail]
+
--------- -
R
D T
R
ref
NTC Thermistors, Accuracy Line
⁄
-10.2296
-11.1334
-12.4493
-12.6814
-12.0596
-21.0704
-13.0723
-13.8973
-14.6337
-15.5322
-16.0349
-16.8717
-17.6439
⎞
⎠
3
)
–
.
-9.094
1
A
3687.667
11903.95
4190.574
4557.725
4791.842
5229.973
5459.339
6022.726
2251.74
2887.62
3658.73
4702.74
4391.97
5759.15
(K)
B
(1)
(2)
-47158.40
-2504699
-7617.13
(10
-102895
-402687
-232807
-115334
-160451
-191141
-194267
-203157
229098
132336
-98275
C
5
K
DETERMINATION OF THE
RESISTANCE/TEMPERATURE DEVIATION
FROM NOMINAL VALUE
The total resistance deviation is obtained by combining the
‘R
B-tolerance’.
When:
then:
When:
then:
The temperature tolerances are plotted in the graphs on the
previous page.
Example: at 0 °C, assume X = 5%, Y = 0.89% and
TC = 5.08%/K (see Table ), then:
A NTC with a R
between −1.17 and +1.17 °C.
2
Z
=
∆T
)
X = R
Y = resistance deviation due to B-tolerance
Z = complete resistance deviation,
TC = temperature coefficient
∆T = temperature deviation,
25
{
=
-tolerance’ and the ‘resistance deviation due to
1.05
=
⎧
⎨
⎩
-11992560.
247033800
∆T
-25025100
------- -
TC
-27448200
Z
-5914730
-7522357
-3730535
-5414091
-3328322
-6869149
-7183526
1
Z
3196830
1509643
25
516652
616652
×
+
D
=
=
-tolerance
=
1.0089
--------- -
100
5.93
---------- -
5.08
------- -
TC
5
⎛
⎝
Z
1
+
25
=
×
--------- -
100
3.354016
3.354016
3.354016
3.354016
3.354016
3.354016
3.354016
3.354016
3.354016
3.354016
3.354016
3.354016
3.354016
3.354016
–
X
-value of 10 kΩ has a value of 32.56 kΩ
1.167 °C
(10
1
1
⎞
⎠
A
}
+
1
−3
×
0.89
---------- -
100
×
)
⎛
⎝
1
Vishay BCcomponents
100%
+
3.495020
3.415560
3.349290
3.243880
2.993410
2.909670
2.933910
2.884190
2.744030
2.569850
2.519110
2.460380
2.367720
2.264100
(10
--------- -
100
(
–
Y
2381 640 3/4/6....
≈
1
−4
B
1.17
⎫
⎬
⎭
=
⎞
⎠
1
K
×
–
−1
5.9345%
1
100%
)
° C)
2.09596E-06
4.95546E-06
3.68384E-06
2.65801E-06
2.13513E-06
1.63214E-06
3.49431E-06
4.11803E-06
3.66694E-06
2.62013E-06
3.51094E-06
3.40538E-06
3.58514E-06
3.27818E-06
·
×
(10
100
C
−6
(
1
K
%
≈
−2
)
5.93%
or Z ≈ X + Y.
www.vishay.com
4.26062E-07
4.36424E-07
7.05046E-08
1.78679E-07
1.37549E-07
6.38309E-08
1.10518E-07
1.03424E-07
1.25535E-07
1.09763E-07
-2.70156E-0
-8.05672E-0
-7.71269E-0
7.1922E-08
(10
)
−7
D
1
K
−3
)
73