MIL-C-62F
6.2 Acquisition requirements. Acquisition documents must specify the following:
a.
Title, number, and date of the specification.
b.
Title, number, and date of the applicable specification sheet, and the complete PIN (see 2.2.1).
c.
Packaging requirements (see 5.1)
6.3 Qualification. With respect to products requiring qualification, awards will be made only for products that 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 Defense Supply Center,
Columbus, ATTN: DSCC-VQP, PO Box 3990, Columbus, OH 43218-3990, or by e-mail to vqp.chief@dla.mil.
6.4 Reforming of dielectric film. Caution should be exercised in using capacitors which have had an idle shelf life
of more than 4 years. Users should refer to MIL-HDBK-1131 "Storage Shelf Life and Reforming Procedures for
Aluminum Electrolytic Fixed Capacitors" for inspection and reforming procedures.
6.4 Working temperature range. In the selection or use of these capacitors, careful consideration should be given
to the overall temperature requirements of the basic equipment, since many equipments must operate over a greater
temperature range than that covered by this specification. Capacitors should be operated within their normal
temperature range for satisfactory service and maximum life.
6.5 High temperature. In planning the location of the capacitors with respect to other component parts, careful
consideration should be given to the proximity of the capacitors to transformers, electron tubes, and high-current
resistors because of the usual temperature rise involved in these components. Continued operation at temperatures
above the normal rating will cause a permanent decrease in capacitance and an increase in series resistance.
6.6 Low temperature. The performance of these capacitors at subzero temperatures is mainly affected by an
increase in series resistance and by a decrease in capacitance. These changes do not persist with the return of
normal temperature conditions. At -40C these capacitors retain approximately 50 percent of the initial capacitance.
6.7 Circuit diagram. For all styles except CE10 to CE13, inclusive, the electrolyte cannot be insulated completely
from the case. The circuit diagram (see 3.1), for these styles shows an indeterminate resistance, which may change
with time, between the negative terminal and ground (case). To insure proper circuit operation, the case should be
considered as being directly connected to the terminal. In applications where the negative terminal is not at ground
potential, the capacitor should be insulated from the chassis by means of an insulating sleeve.
6.8 Polarity. These capacitors should be used only in dc circuits with polarity properly observed. If ac components
are present, the sum of the peak ac voltage plus the applied dc voltage must not exceed the dc rated voltage (see
3.1). The peak ac value should also be less than the applied dc voltage, in order that polarity may be maintained
even on negative peaks. Capacitors which have been subjected to voltage reversal should be discarded.
6.9 Storage. It is to be noted that these capacitors deform and become unusable when stored at high
temperatures; however, they may be subjected, without permanent damage, to conditions in transit where the
temperatures range from -55 to +85C, and where the altitude is up to 80,000 feet.
6.10 Current-limiting resistor. It is recommended that the current-limiting resistor referenced in 4.5.2 have a
resistance in ohms equal to or less than the dc rated voltage (see 3.1).
6.11 Insulated capacitors. Sleeved capacitors are recommended for use in those applications where the case is to
be connected at a potential above or below ground potential. The use of uninsulated capacitors in such applications
could present a shock hazard to personnel or possibly cause an accidental short circuit.
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