AN3306
REVISION 7
b.
The container and water-cover relay shall then be placed in a vacuum chamber. The chamber shall be
sealed. The chamber pressure shall be reduced from room ambient to 0.82 inch (80,000 feet) +0.0 inch
-0.2 inch of mercury within 5 minutes, and shall be maintained at this level for 30 minutes minimum.
The chamber pressure shall be increased to room ambient within 1 minute, and shall be maintained at
room ambient pressure for 30 minutes, minimum. The foregoing shall constitute open cycle. The relay
shall remain fully immersed in the water during the cycle.
c.
Within a maximum of one-half hour after the cycle, each relay shall be removed from the water and
dried by shaking, wiping, or blowing with contaminant-free air or gas, but not by any form of heating or
baking.
d.
Within a maximum of one-half hour after drying, each relay shall be subject to the DWV and IR tests.
Life test requirement 50,000 cycles minimum.
Qualification by similarity: If the relay case, frame, or enclosure contains integral sealed electromagnetic
relays (mounting means excepted) currently listed on the qualified products list of MIL-PRF-83536/32,
reduced testing shall consist of subjecting four sample units to the shock and vibration requirements of this
specification sheet. Post tests shall include insulation resistance, dielectric withstanding voltage and electrical
characteristics, and seal. One unsealed unpotted unit shall be submitted to the qualifying activity.
VERIFICATION:
Group A.
a. Group A1: Run-in. This subgroup may be waived by the qualifying activity if fully tested sealed MIL-
PRF-83536/32 relays are used internally.
b. Group A2: 100 percent.
c. Dielectric withstanding voltage:
(1)Tests to be conducted at sea level rating only.
(2)Duration of application: 5-10 seconds at a 10 percent increase in the dielectric strength voltage.
Group A acceptance reports shall be submitted to the qualifying activity on a yearly basis in order to retain
qualification for this detail specification sheet.
Group B and group C testing are not required. The manufacturer shall notify the qualifying activity in the event
of any design or construction changes, and the qualifying activity may impose additional testing requirements
as necessary.
Part or Identifying Number (PIN): AN3306-1 and AN3306-2.
NOTES:
AN3306-2 relays shall meet the mixed loads current requirements specified in MIL-PRF-6106. The relay
shall be equipped with a glass to metal sealed electrical connector.
Supersession information: Supersedes USAF Drawing 50B6186.
Changes from previous issue. The margins of this specification are marked with vertical lines to indicate
where changes from the previous issue were made. This was done as a convenience only and the
Government assumes no liability whatsoever for any inaccuracies in these notations. Bidders and contractors
are cautioned to evaluate the requirements of this document based on the entire content irrespective of the
marginal notations and relationship to the last previous issue.
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