MIL-PRF-15305F
6. NOTES.
(This section contains information of a general or explanatory nature which may be helpful, but is not mandatory.)
6.1 Intended use. The coils covered by this specification are suitable for conventional application. Manufacturers
using these parts in printed circuits involving dip-soldering should check the assembly after processing to verify that
there is no degradation of the coils.
6.2 Acquisition requirements. Acquisition documents must specify the following:
a. Title, number, and date of this specification.
b. Title, number, and date of applicable specification sheet (or military standard), the military part number,
c. Packaging requirements (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 QPL No. 15305 whether or not such
products have actually been 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, PO Box 3990, Columbus, OH 43218-3990, or by e-mail to 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.
6.4 Comparison standards. Comparison standards will be established during qualification . The values of electrical
characteristics (see 4.6.5) which are to be referred to comparison standards will be marked on or permanently attached
to each coil. One unit will be returned to the contractor for use in measuring those characteristics which are to be
referred to the comparison standard, and two units will be retained by the Government (see 3.1, and 4.4.2.1).
6.5 Supersession data. The intermediate and radio frequency transformers formerly covered by MIL-C-15305C
are now covered by MIL-T-55631.
6.6 Dielectric withstanding voltage. The following method can be used in determining the dielectric withstanding
voltages required for special coil designs.
Working voltage 1/
RMS test voltage, 60 Hz
<30
100
30 to 174 incl
500
175 to 700 incl
2.8 x working voltage
>700
1.4 x working voltage +1,000 V
1/ The working voltage is defined as the maximum instantaneous voltage stress that may appear, under normal
rated operation, across the insulation being considered.
6.7 Degradation limits.
6.7.1 Phenolic and iron cores. The degradation limits for phenolic and iron core coils will not exceed the following
limits:
Inductance - - - - - - - - - - - - - - - - - - - - - - -
±5 percent
Q -----------------------------
±10 percent
Self resonant frequency - - - - - - - - - - - - - -
±8 percent
±3 percent +0.001Ω
Direct current resistance - - - - - - - - - - - - -
29
For Parts Inquires submit RFQ to Parts Hangar, Inc.
© Copyright 2015 Integrated Publishing, Inc.
A Service Disabled Veteran Owned Small Business