MS24143 Relays, Electromagnetic, 3 Pst N.O., 25 Amperes, Type I, Hermetically Sealed

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MS24143X

REQUIREMENTS:

Dimensions and configurations: See figure 1. Environmental characteristics:

Temperature range 1/: -70°C to +125°C Max altitude rating: 80,000 ft

Shock G-level: 25 g's Duration: 6-9 ms Max duration contact opening: 2 ms

Vibration - Sinusoidal: See table I. Vibration - Random: Not applicable. High shock: Not applicable. Acceleration 15 g's

Electrical characteristics:

Minimum insulation resistance, initial: 100 megohms. After life or environmental tests: 50 megohms. Dielectric strength (sea level): 2-5 s.

	Initial 2/		After life tests 2/
	28 V dc	115 V ac	28 V dc	115 V ac
Coil to case	1,250 V rms	1,500	1,000 V rms	1,125
Aux contacts	1,250 V rms	1,500	1,000 V rms	1,125
All other points	1,250 V rms	1,800	1,000 V rms	1,350

Dielectric strength (altitude): 1 minute.

	Initial	After life tests
Coil to case	500 V rms	500 V rms
Aux contacts	500 V rms	500 V rms
All other points	700 V rms	700 V rms

Max contact drop initial: 0.150 volt. After life test: 0.175 volt.

Overload current (NO): 200 amperes dc, 3/. Rupture current 250 amperes dc, 3/. Duty rating: Continuous.

1/ Coils operated at either 50, 60, or 400 Hz require ambient temperature not to exceed 71°C maximum.

2/ For A3 and A4, coil terminals X1 and X2 must be shorted together for all dielectric testing between coil to case, coil to main or auxiliary contacts, and coil to all other points.

3/ For A3 and A4, rupture and overload current (NO) is 75 A.

4/ Use MS27243-1 terminal cover during dielectric testing at altitude.