PTC Military Grade Thermistors
Military Grade Chip Thermistors
The High-Rel Positive Temperature Coefficient chip
thermistor is designed for wire bonding applications
found in hybrid circuitry. The devices exhibit a linear
Resistance vs. Temperature curve approximating
0.7%/C which make them the ideal solution for
temperature compensation applications.
Engineering Information
Thermal time constant:
Power rating:
Dissipation constant:
Resistance at 25C:
30 seconds max in still air
.125 W at 25 c, derate to 0 at 125
1.25mW/
°
C min in still air
10 ohms to 10Kohms (see table)
Standard Configuration
Silicon Core
Percent of Maximum Power
PTC THERMISTORS
D
scc (Defense Supply Center, Columbus) issued
specification MIL-PRF-32192 dictating the performance
and inspection requirements for these devices which
includes a test for wire bonding integrity. Many leading
Aerospace companies around the world have selected these
components for their mission critical space flight applications.
Quality Thermistor has summarized the requirements of the
MIL-PRF-32192 specification on this catalog page. The
complete detailedMIL-PRF-32192 specification can be
obtained by contacting the DSCC.
Metalized Terminations
Dimension
L
W
+/-.010(0.254)
26
Military Grade
10-12
OHMS
0.032(0.812)
0.032(0.812)
0.028(0.711)
15-1800
OHMS
0.032(0.812)
0.032(0.812)
0.050(1.27)
2200-4700
OHMS
0.038(0.965)
0.038(0.965)
0.072(1.828)
OHMS
0.030(0.762)
0.030(0.762)
0.072(1.828)
5600
10000
OHMS
0.022(0.558)
0.022(0.558)
0.072(1.828)
Quality Thermistor, Inc. is
AS9100 certified
T
Ordering Information
M32192 E 1 W 500 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
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
100
80
60
40
20
0
-55
-20
0
20
40
80
120
Ambient Temperature (°C)
25°C
125°C
140
160
CODE
G
U
T
C
D
S
W
TABLE 2
Factors for determining resistance at various temperatures.
TEMPERATURE 10-27
33-68 82-330 390-2.7k 3.3k-10k
°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
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