MIL-PRF-23419/8J
REQUIREMENTS:
Interface and physical dimensions: See figure 1.
Applicable fuseholder: Grayhill type 2-42, ultra miniature test clip (or equivalent). For 7 Ampere (A),
10A, and 15A fuses, use Grayhill pushpost number 29-100 or equivalent.
Case material: Ceramic or glass.
Terminals:
Materials: Caps, 90/10, commercial bronze; leads, copper.
Finish:
For gold finish leads, caps shall have a gold finish. Caps and leads shall be gold
plated in accordance with SAE AMS2422, or equivalent method. For solder coated
leads (suffix "T"), the leads of the gold plated cap and lead assemblies shall be solder
dipped (see table I).
Strength: 5 pounds along terminal axis.
Current rating: See table I.
Characteristic: See table I.
Voltage rating: See table I.
Current carrying capacity: 100 percent at +25°C; 110 percent at -55°C; 80 percent at +125°C.
The temperature of the case, body, or terminals shall, at no point, rise more than +70°C above the
ambient air temperature. The maximum temperature rise for 10A and 15A fuses shall be
+85°C.
Resistance:
See table I.
Overload interrupt: Percentage of nominal rating, interrupt time -55°C through +125°C, 200 percent
in 0 second to 5 seconds; 300 percent in 0 second to 0.1 second. Interrupt time for 15A fuses shall
be 10 seconds maximum at 200 percent of rated current and .3 second maximum at 300 percent of
rated current.
Short circuit interrupt: 300 amperes at maximum voltage dc.
Shock: Method I of MIL-PRF-23419.
Thermal shock: Method 107, MIL-STD-202, test condition B.
Qualification: Qualification may be granted to style FM08 fuses to those qualified for style FM04
fuses, provided they meet the verification requirements shown below:
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