Percent of Maximum Power
NTC THERMISTORS
NTC Military Grade Thermistors
Military Grade Chip Thermistors
Screened, high-rel surface mount NTC thermistors
are provided in the EIA 0805 package. Resistance
values are specified at 25ºC with resistances at other
temperatures calculated using the appropriate resist-
ance vs. temperature tables.
Military Grade
Engineering Information
Thermal Time Constant*:
8 seconds maximum.
Dissipation Constant*:
Power Rating:
2mW/°C min.
The thermistor shall be capable of
dissipating a maximum power of
.125 watt at 25°C. Thermistors
shall be derated in accordance
with Table 1.
Zero power resistance values at
25°C (See Table 2).
T
he data provided on this page outlines the DSCC
(Defense Supply Center, Columbus) drawing MIL-PRF-
32192. The complete specifications can be obtained by
contacting DSCC (Defense Supply Center, Columbus). Please
contact Quality Thermistor Inc., for devices provided to the
MIL-PRF-32192 (1206 package) specification.
Resistance At 25°C:
*Thermal Time and Dissipation Constant may vary depending on mounting.
Dimensions MIL-PRF-32192/4 NTC STYLE
L = .078" +/– .008"
W = .049" +/– .008"
T = .055" Max
BW = .020" +/– .005"
Ordering Information
M 3 21 9 2 A 4 B 10 0 2 J M
Level Designator
Tolerance Code
# of Zeros
1st 3 Resistance Digits
Termination Finish
MIL-PRF-32192 Slash
Sheet Designation
Resistance/Temperature
Ratio
DSCC Drawing Number
TABLE 3
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
100
80
60
40
20
0
-.55
-.20
0
20
40
80
120
Ambient Temperature (°C)
25°C
CODE
B
G
U
T
C
D
S
W
125°C
140
160
TABLE 2
25°C to 125°C Ratio
RATIO
D
(7.1)
47 Ohm
to
250 Ohm
RATIO
H
(13.0)
470 Ohm
to
1.5K Ohm
RATIO
L
(16.1)
2K Ohm
to
4.7K Ohm
RATIO
A
(19.8)
5K Ohm
to
20K Ohm
RATIO
B
(29.4)
47K Ohm
to
100K Ohm
RATIO
M
(23.3)
100K Ohm
to
200K Ohm
RATIO
N
(38.5)
240K Ohm
to
510K Ohm
RATIO
C
(48.7)
750K Ohm
to
2M Ohm
RATIO
R
(62.5)
4.7M Ohm
to
10M Ohm
16
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