MIL-PRF-23419H
6. NOTES
(This section contains information of a general or explanatory nature that may be helpful, but is not
mandatory.)
6.1 Intended use.
6.1.1 Fuses. Fuses covered by this specification are intended for use in electronic and low power
electrical equipment where relatively low values of short circuit currents are encountered. The fuse
primarily provides protection and isolation for the equipment itself. These fuses are designed to endure
environmental requirements not specified in MIL-PRF-15160. The fuses covered by this specification are
unique due to the fact that these devices must be able to operate satisfactorily under the following
demanding conditions: 10 g's vibration, 100 g's of shock, thermal shock from -65°C to +125°C and 48
hours of salt atmosphere. In addition, these requirements are verified under a qualification system.
Commercial components are not designed to withstand these environmental conditions.
6.1.2 CAUTION. Application of fuses must be made within the short circuit current and voltage ratings
shown on the applicable specification sheet. The available short circuit current of the system in which the
fuse is applied shall not exceed the short circuit current rating of the fuse. Use of fuses beyond these
requirements may be dangerous to personnel and cause damage to the equipment.
6.1.2.1 Fuses covered by this specification may be safely applied in circuits having a lower voltage
than shown as the maximum for the particular fuse provided the short circuit current rating of the fuse is
not exceeded. Fuses should never be applied in circuits having voltages greater than the specified
maximum fuse voltage rating.
6.1.3 WARNING. FM08 style cartridge fuses are susceptible to plasma arcing once the internal
pressure falls near 50 torr or below. If used in a vacuum, the fuse will eventually leak down to critical
pressure. If the fuse encounters over-limit currents with sufficient source current, a plasma arc can ensue
that will consume the fuse and possibly damage the hardware. Therefore, it is recommended these style
fuses not be used in vacuum applications with voltages greater than 36 volts.
6.2 Acquisition requirements. Acquisition documents must specify the following:
a. Title, number, and date of the specification.
b. Packaging requirements (see 5.1).
c. Special marking, if required.
6.3 Qualification. With respect to products requiring qualification, awards will be made only for
products which are, at the time of award of contract, qualified for inclusion in Qualified Products List
whether or not such products have actually been so listed by that date. The attention of the contractors is
called to these requirements, and manufacturers are urged to arrange to have the products that they
propose to offer to the Federal Government tested for qualification in order that they may be eligible to be
awarded contracts or orders for the products covered by this specification. Information pertaining to
qualification of products may be obtained from the DLA Land and Maritime, ATTN: DLA Land and
Maritime-VQP, 3990 E. Broad Street, Columbus, OH 43218-3990, or by e-mail mailto:vqp.chief@dla.mil.
An online listing of products qualified to this specification may be found in the Qualified Products
Database (QPD) at https://assist.dla.mil.
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