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Circuit Breaker

Model / MPN: 523A202 | NSN: 5925-00-735-9377
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
Sold in multiples of
Body Style
Single pole type
Bushing Length
0.305 inches
Body Length
1.750 inches
Body Width
0.625 inches
Case Material
Center To Center Distance Between Terminals Parallel To Length
0.687 inches
Mounting Surface To Terminal End Distance
1.500 inches
Pole Quantity
Mounting Facility Type And Quantity
1 threaded bushing
Storage Type
General purpose warehouse
Thready Qty Per Inch (tpi)
Maximum Continuous Load Current Rating Per Pole
2.0 amperes ac single location
Operating Voltage Type And Rating Per Pole In Volts
120.0 ac single location
Maximum Interrupting Capacity Current Type And Rating Per Pole In Amps
500.0 ac single location
Circuit Protection Type
Overcurrent single location
Trip Release Method
Magnetic single location
Trip Release Characteristic
Time delay single location
Ultimate Trip Rating Of Continuous Current Rating Per Pole In Percent
125.0 single location
Reset Method
Main Contact Tripping Mechanism Type
Trip free
Manual Actuator Type And Quantity
1 toggle
Actuator Function
Actuator Position Designation
At pole one
Internal Trip Release Configuration
Relay trip single location
Thread Size
0.375 inches
Trip Delay Time In Seconds Per Rated Continuous Current
1.000 at 125 pct single location and 4.000 at 125 pct single location
Inclosure Protection Type For Which Designed
Hermetically sealed
Frequency In Hertz
400.0 single location
Thread Series Designator
Terminal Type And Quantity
2 wire hook and 2 tab, solder lug

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523A202 Cross Reference