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Circuit Breaker

Model / MPN: SM-A-742924-3 | NSN: 5925-00-148-8124
ITAR Registered seal

A device with means other than fuses for automatically opening the circuit in which it is installed when the current varies from the predetermined value for which the device is set. May include provisions for manual operation. At least one set of contacts must be in series with the actuating elemen (s). A combination of semiconductor and passive devices may be used in lieu of contacts. For automatically operated items in which the actuating (tripping) element and contacts are not in series, see relay (as modified). For items which are operated both manually and automatically but the actuating elements and contact are not in series, see relay-switch. Excludes circuit breaker box and magneto "breaker" assemblies. See also switch (as modified) ; and controller.

Product Details
NATO Stock Number
5925-00-148-8124
Sold in multiples of
1 EA
DEMIL
NO
Thread Pitch Diameters
+0.1177/+0.1214 inches
Thread Pitch Diameters
+0.1177 to 0.1214 inches
Body Style
Multipole-multiple actuator type
Body Length
Between 2.490 inches and 2.510 inches
Body Width
Between 2.990 inches and 3.010 inches
Case Material
Plastic
Center To Center Distance Between Terminals Parallel To Length
Between 1.928 inches and 1.948 inches
Center To Center Distance Between Terminals Parallel To Width
Between 0.740 inches and 0.760 inches
Distance Between Centerlines Of Mounting Facilities Parallel To Body Length
Between 2.052 inches and 2.072 inches
Switch Contact Arrangement
Single pole, double throw
Distance Between Centerlines Of Mounting Facilities Parallel To Body Width
Between 0.740 inches and 0.760 inches
Fragility Factor
Moderately rugged
Boss Height
Between 0.130 inches and 0.150 inches
Mounting Surface To Terminal End Distance
Between 2.461 inches and 2.481 inches
Pole Quantity
4
Arc Quenching Method
Magnetic blowout
Mounting Facility Type And Quantity
8 threaded hole
Storage Type
General purpose warehouse
Thready Qty Per Inch (tpi)
32
Maximum Continuous Load Current Rating Per Pole
60.0 amperes ac all locations
Operating Voltage Type And Rating Per Pole In Volts
250.0 ac all locations
Maximum Interrupting Capacity Current Type And Rating Per Pole In Amps
1000.0 ac all locations
Circuit Protection Type
Overcurrent all locations
Trip Release Method
Magnetic all locations
Trip Release Characteristic
Instantaneous fourth location
Trip Release Characteristic
Time delay second location
Trip Release Characteristic
Time delay third location
Trip Release Characteristic
Time delay first location
Ultimate Trip Rating Of Continuous Current Rating Per Pole In Percent
115.0 all locations
Reset Method
Manual
Main Contact Tripping Mechanism Type
Trip free
Manual Actuator Type And Quantity
4 toggle
Actuator Function
Trip-reset
Actuator Position Designation
At each pole
External Actuator Linkage Arrangement
One, two, three, and four linked
Auxiliary Switch Function And Quantity
1 alarm
Internal Trip Release Configuration
Series trip first location
Internal Trip Release Configuration
Relay trip fourth location
Internal Trip Release Configuration
Series trip second location
Internal Trip Release Configuration
Series trip third location
Thread Size
0.138 inches
Switch Location And Position Designation
Internal at pole one
Trip Delay Time In Seconds Per Rated Continuous Current
2.200 at 200 pct first location and 20.000 at 200 pct first location
Trip Delay Time In Seconds Per Rated Continuous Current
2.200 at 200 pct second location and 20.000 at 200 pct second location
Trip Delay Time In Seconds Per Rated Continuous Current
2.200 at 200 pct third location and 20.000 at 200 pct third location
Inclosure Protection Type For Which Designed
Fungus resistant and vibration resistant
Switch Terminal Type
Tab, solder lug
Switch Current Rating And Type In Amps
10.0 ac
Switch Voltage Rating And Type In Volts
125.0 ac
Frequency In Hertz
50.0 all locations or 60.0 all locations or 400.0 all locations
Thread Series Designator
Unc
Terminal Type And Quantity
10 threaded stud

Pricing and Availability

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SM-A-742924-3 Cross Reference
  • AM4-Z1-3
  • APL5111-1REC2-3235-3