PTC Military Grade Thermistors
Military Grade Surface Mount Thermistors
MIL-PRF-32192/2 PTC Surface Mount Thermistors
exhibit a stable, proportional and resistance vs.
temperature signal approximating 0.7%/C.
Military Grade: (22Ω to 5.6KΩ)
Positive Temperature Coefficient:
Operating Temperature Range:
Storage Temperature:
Thermal Time Constant:
Dissipation Constant:
Power Rating:
0.7%/°C
–55°C to +125°C
–65°C to 150°C
30 seconds max. – Still Air
2.5mW/°C min. – Still Air
0.250 Watts @ 25°C derated to
125°C (Table 1)
Recommended solder reflow peak: 230°C for less than 10 sec.
Quality Thermistor has summarized the requirements of the MIL-
PRF-32192/2 Specification on this
catalog page. The complete
detailed MIL-PRF-32192/2
Specification
can be obtained by
contacting DSCC
(Defense Supply Center,
Columbus).
Dimensions MIL-PRF-32192/2 PTC STYLE
L = .078" +/– .008"
W = .049" +/– .008"
T = .055" Max
BW = .020" +/– .005"
Ordering Information
M32192 E 2 B 100 1 J M
Level Designator
Tolerance Code
4th Resistance Digit
1st 3 Resistance Digits
Termination Finish
MIL-PRF-32192 Slash
Sheet Designation
Resistance/Temperature
Ratio
DSCC Drawing Number
TABLE 4
Termination Materials
TYPE
MATERIAL
Solderable
Base metalization barrier metal, solder coated
Epoxy Bondable Gold
Epoxy Bondable Platinum Gold
Epoxy Bondable Platinum Gold
Epoxy Bondable Palladium Silver or Platinum Silver
Epoxy Bondable Palladium Silver or Platinum Silver
Wire Bondable Silver
Wire Bondable Gold
TABLE 1
Derating Curve for High Ambient Temperatures
Percent of Maximum Power
100
80
60
40
20
0
-55
-20
0
20
40
80
120
Ambient Temperature (°C)
25°C
125°C
140
160
CODE
B
G
U
T
C
D
S
W
TABLE 2
Factors for determining resistance at various temperatures.
TEMPERATURE 22-27
33-68 82-330 390-2.7k 3.3k-5.62k
°C
OHMS
OHMS
OHMS OHMS
OHMS
–55°C
0.552
0.519
0.493
0.481
0.493
–15°C
0.739
0.728
0.716
0.709
0.717
0°C
0.830
0.822
0.813
0.810
0.816
25°C
1.000
1.000
1.000
1.000
1.000
50°C
1.190
1.201
1.208
1.211
1.205
75°C
1.408
1.411
1.441
1.446
1.430
100°C
1.651
1.669
1.706
1.709
1.660
125°C
1.908
1.940
1.993
1.983
1.862
TABLE 3
Resistance tolerance at temperatures other than 25°C.
TEMPERATURE
F
G
J
K
°C
PERCENT (±) PERCENT (±) PERCENT (±) PERCENT (±)
–55°C
15
17
20
25
–15°C
9
10
13
18
0°C
3
4
7
12
25°C
1
2
5
10
50°C
3
4
7
12
75°C
5
6
9
14
100°C
7
9
12
17
125°C
10
12
15
20
800-554-4784
w w w. t h e r m i s t o r. c o m
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3
PTC THERMISTORS
D
Military Grade
SCC (Defense Supply Center, Columbus) issued specifi-
cation MIL-PRF-32192/2 which dictates the perform-
ance and inspection requirements for these
Thermistors. Many leading Aerospace companies around the
world have selected these components for their mission criti-
cal applications.
