MIL-PRF-83536/21B
Time current relay characteristics: See table II.
TABLE II. Time current relay characteristics. 1/
Successive application
Amperes
Time
1
20
1 hour
2
30
20 seconds
3
75
2 seconds
4
150
0.53 second
1/ All relays shall withstand overload and fault currents. Relays must be able to
sustain five applications (make and carry only) of power concurrently on
adjacent poles at each of four different current levels in the sequence listed
in table II. Separate relays shall be tested at 28 V dc and 115/200 V ac, 400
Hz 3-phase. Cooling time between successive applications shall be 30
minutes. Tests shall be performed on both normally open and normally
closed contacts. There shall be no failures or evidence of welding or sticking
and relays shall pass contact voltage drop at the conclusion.
Operate time: 6 milliseconds maximum with rated coil voltage at 25C. 7 milliseconds maximum with rated coil
voltage over the temperature range.
Release time: 6 milliseconds maximum from rated coil voltage at 25C. 7 milliseconds maximum from rated coil
voltage over the temperature range.
Duty rating: Continuous.
Coil transient suppression: Not applicable.
Neutral screen: Not applicable.
Electrical data:
Insulation resistance:
Initial: 100 megohms minimum at 500 V dc.
After life or environmental tests: 50 megohms minimum at 500 V dc.
1/ CAUTION: Due to possible interaction of relay magnetic fields, the following spacing requirements, as a
minimum, shall be considered in dense packaging situations:
a. Row to row assisting fields: .125 (3.18 mm).
b. Row to row opposing fields: .1875 (4.763 mm).
c. Side to side alternating fields: .0625 (1.588 mm).
d. Side to side like fields: .125 (3.18 mm).
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