MIL-PRF-8805/3L
Mechanical endurance (10 to 15 cpm):
MS25089-1, MS25089-2, and MS25089-3:
At room temperature: 200,000 cycles.
At -55C and +85C: 100,000 cycles each.
MS25089-4 and MS25089-5: 50,000 cycles.
Electrical endurance: 25,000 cycles at sea level; 5,000 cycles at 50,000 feet.
Electrical ratings:
Central terminal ratings: 3 amperes maximum.
Other than center terminals: See table I.
TABLE I. Electrical ratings, power circuit switches. 1/
Sea level
50,000 feet
Load
28 V dc
115/V ac, 60/400 Hz
28 V dc
Amperes
Amperes
Amperes
Resistive ----------
10
10
---
Inductive ----------
5
5
5
Lamp --------------
3
3
---
1/ Center terminal rating: 3 amperes maximum.
2/ The 400 Hz ratings are shown for information only and do not require
electrical endurance testing.
Sand and dust: Applicable.
Electrical logic circuit (5.0 V dc, .010 ampere): Applicable when specified (see table II): 25,000 cycles
at an actuation rate of 120 cycles per minute maximum with no "stick", or "misses", allowed when tested
in accordance with EIA RS448, method 17 as follows:
Test condition:
Each switch contact shall be tested using a 5.0 0.5 V dc, 10 1 mA resistive load. During each
closure of the contacts, the voltage drop across the switch terminals shall be monitored for a
duration of no less than 50 percent of each contact static closure. The switch contacts need not
be monitored until 10 milliseconds after the initial contact closure to exclude any contact bounce.
During each opening of the contacts, the voltage drop across the switch terminals shall be
monitored for a duration of no less thn 50 percent of each contact opening.
A voltage of 2.1 volts or greater across the switch terminals shall constitute a contact "miss"
(failure to properly close the circuit). A voltage drop of less than 90 percent of the open-circuit
voltage shall constitute a contact "stick" (failure to properly open the circuit).
The monitoring device shall either record the number of contact closures at which "sticks" and/or
"misses" occur, or discontinue the test when "sticks" and/or "misses" occur.
Operating temperature:
a. 25 percent of the test cycle at -55C specified.
b. 25 percent of the test cycle at room ambient conditions.
c. 50 percent of the test cycle at +85C.
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