MIL-PRF-19207G
6. NOTES
(This section contains information of a general or explanatory nature that may be helpful, but is not
mandatory.)
6.1 Intended use. Extractor post type fuseholders are used to fully enclose electrical fuses and are
designed for panel mounting. The fuseholders covered by this specification are unique due to the fact
that these devices must be able to operate satisfactorily under the following demanding conditions:
Vibration, 100 g's of shock, hours of salt spray, and thermal shock from -55°C to +85°C. In addition,
these requirements are verified under a qualification system. Commercial components are not designed
to withstand these environmental conditions.
6.2 Acquisition requirements. Acquisition documents must specify the following:
a. Title, number, date of the specification, applicable specification sheet, and the complete type
designation or PIN (see 3.1).
b.
The specific issue of individual documents referenced, if required. If not otherwise specified, the versions of
the individual documents referenced will be those in effect on the date of release of the solicitation (see 2.2
c.
Mounting hardware (see 3.4.6).
d. Requirements for packaging (see 5.1).
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-VQH, 3990 E. Broad
Street, Columbus, OH 43213-1199, or by e-mail: vqh.chief@dla.mil. An online listing of products
qualified to this specification may be found in the Qualified Products Database (QPD) at
6.3.1 Provisions Governing Qualification. Copies of SD-6, "Provisions Governing Qualification" may be
obtained from the DLA Document Services, Building 4/D, 700 Robbins Avenue, Philadelphia, PA 19111-
6.4 Circuit design. Fusing circuits using extractor post fuseholders should have a fuse current rating of
approximately 120 percent of the circuit current rating. Ordinarily this will provide adequate protection
and will avoid needless blowing of fuses.
6.5 Finishes.
6.5.1 Finish, fuse mating surface. Based on past experience, silver plating in accordance with
ASTM B700, with a .0003 inch (0.008 mm) minimum thickness, has been used successfully for current
carrying fuse mating contact surfaces to meet the performance requirements of this specification. The
silver plating used has been 99.9 percent pure silver and not coin silver.
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