#78-166-1 Magnetic Circuit Protector | Circuit Breakers

78-166-1

Circuit Breaker

NSN 5925-00-260-4298

DEMIL
Shelf Life
UOM
NIIN
Demil:
NO
Shelf Life:
N/A
UOM:
1 EA
NIIN:
002604298

Technical Specifications of NSN

Body Style:
Multipole-single actuator type
Bushing Length:
Between 0.390 inches and 0.565 inches
Body Length:
1.562 inches
Body Width:
1.281 inches
Case Material:
Metal
Center To Center Distance Between Terminals Parallel To Length:
0.875 inches
Center To Center Distance Between Terminals Parallel To Width:
0.625 inches
Mounting Surface To Terminal End Distance:
1.828 inches
Pole Quantity:
2
Mounting Facility Type And Quantity:
1 threaded bushing
Thready Qty Per Inch (tpi):
32
Maximum Continuous Load Current Rating Per Pole:
18.0 amperes ac first location
Maximum Continuous Load Current Rating Per Pole:
250.0 milliamperes ac second location
Operating Voltage Type And Rating Per Pole In Volts:
240.0 ac all locations
Maximum Interrupting Capacity Current Type And Rating Per Pole In Amps:
300.0 ac all locations
Circuit Protection Type:
Overcurrent all locations
Trip Release Method:
Magnetic all locations
Trip Release Characteristic:
Instantaneous all locations and time delay all locations
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:
1 toggle
Actuator Function:
Trip-reset
Actuator Position Designation:
Between pole one and two
Internal Trip Release Configuration:
Series trip all locations
Thread Size:
0.375 inches
Trip Delay Time In Seconds Per Rated Continuous Current:
0.055 at 200 pct all locations and 0.950 at 200 pct all locations and 0.240 at 400 pct all locations
Inclosure Protection Type For Which Designed:
Hermetically sealed
Frequency In Hertz:
60.0 all locations
Thread Series Designator:
Unef
Terminal Type And Quantity:
4 wire hook
NSN:
5925-00-260-4298
Item Name:
Magnetic Circuit Protector
Cage Code:
74193

Other Related Parts

Part Number
Cage
RNCC
RNVC
RNAAC
Status
MSDS
SADC
Part Number:
1730-2811
Cage Code:
08241
RNCC:
3
RNVC:
9
RNAAC:
TX
Status:
A
MSDS:
SADC:
Part Number:
AP12-1406-1
Cage Code:
81541
RNCC:
5
RNVC:
2
RNAAC:
TX
Status:
A
MSDS:
SADC:

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Pricing & Availability

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Catalog Drilldown
--- Electrical And Electronic Equipment Components
------ Circuit Breakers
--------- Circuit Breakers
------------ P/N 78-166-1

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Last Updated: 08/15/2025