MIL-PRF-23419 Fuse: Cartridge, Instrument Type, General Specification ForThis specification covers the general requirements and test procedures for instrument type fuses designed for the protection of electrical, electronic, and communication equipment on direct current \(dc\) and alternating current \(ac\) \(up to 400 hertz \(Hz\)\) circuits.

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MIL-PRF-23419H

4.7.9 Shock (see 3.13). Fuses shall be tested in accordance with 4.7.9.1 or 4.7.9.2, as specified (see

4.7.9.1 Method I. Fuses shall be tested in accordance with method 213 of MIL-STD-202. The

following details and exceptions shall apply:

a. Mounting method and accessories: Fuses shall be mounted in or on applicable fuseholder (see

b. Test condition I, unless otherwise specified (see 3.1).

c. Measurements before and after test: One-half of the sample units shall be tested while carrying

100 percent of rated current (see 3.1), and the remainder with no current. All fuses shall be

tested before and after test for continuity as specified in 4.7.2.

4.7.9.2 Method II. Fuses shall be tested in accordance with method 207 of MIL-STD-202. The

following details and exceptions shall apply:

a. Mounting fixtures: Fuses shall be tested in or on applicable fuseholder, mounted on fixture 207-

4A, or equivalent, of MIL-STD-202.

b. Electrical load on operating conditions: One-half of the sample units shall be tested while

carrying 100 percent of rated current (see 3.1), the remainder with no current.

c. Measurement: All fuses shall be tested before and after test for continuity as specified in 4.7.2.

4.7.10 Salt atmosphere (corrosion) (see 3.14). Fuses shall be tested in accordance with method 101

of MIL-STD-202. The following details shall apply:

a. Five percent salt solution.

b. Test condition B.

c. Following the drying period, the fuses shall be subjected to 100 percent of rated current for 1

hour.

d. Following the test, fuses shall be examined for compliance with 3.14.

4.7.11 Moisture resistance (see 3.15). Fuses shall be tested in accordance with method 106 of

MIL-STD-202. The following details and exceptions shall apply:

a. Mounting: Normal mounting means on a noncorrosive metal panel positioned 15 degrees from

the vertical with the terminal down.

b. Polarizing voltage shall be 100 volts dc.

c. Steps 7a and 7b are not applicable.

d. Following the test, the fuses shall be examined for compliance with 3.15.