MIL-PRF-15160/3H
VERIFICATION:
Qualification inspection is not applicable for the 1/4A, 1/2A characteristic A and the 1/100A, 1/32A, and
1/16A characteristic B fuses (see table l) of this specification sheet and shall be replaced by acceptance
testing consisting of Group A and Group B inspections per MIL-PRF-15160, prior to delivery.
INSPECTION ROUTINE:
Overload tests (group II): Fuses for the overload interrupt test shall be selected and tested as specified
in table II for qualification test.
TABLE II. Overload tests.
Examination of test
Number of sample
fuses
Group II
20
Terminal strength
12
Overload interrupt 1/
135% at room ambient
4
200% at 55°C
4
200% at +85°C
4
300% at 55°C
4
4
300% at +85°C
1/ For characteristic B fuses, only, four additional
fuses shall be tested at 200 percent of rating at
room ambient temperature.
Low voltage overload interrupt (group V for qualification; group III for group C inspection): Four sample
characteristic B fuses of each current rating shown in table III shall be subjected to 135 percent current at
the voltage specified in the table. The fuses shall interrupt the circuit within 1 hour. The test shall be
conducted at room ambient.
TABLE III. Low voltage overload interrupt.
(Characteristic B fuses only).
Ampere rating
Test voltage
1/100A
36V
1/4A
15V
1/2A
10V
6/10A
8V
8/10A
6V
1A
5V
Note - for low voltage applications, see 6.1.5.1
for caution regarding low voltage applications.
Short circuit test: The number of group III samples for qualification and qualification retention (group C)
testing shall consist of 4 sample fuses of each of the types and of the current ratings as shown in table IV.
Short circuit interrupt tests shall be conducted at the ac voltage indicated, and the fuses shall withstand a
minimum short circuit current as shown in table IV.
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