#ETN8257 Circuit Breaker Tripping Unit 4.844 inches overall width

ETN8257

Circuit Breaker Tripper

NSN 5925-00-058-4564

DEMIL
Shelf Life
UOM
NIIN
Demil:
NO
Shelf Life:
N/A
UOM:
1 EA
NIIN:
000584564
Description

Rectangular dimensional envelope body style, 8.469 inches overall length, 3.109 inches overall height, 4.844 inches overall width.

Product Technical Spec.

Body Style:
Rectangular dimensional envelope
Overall Length:
8.469 inches
Overall Height:
3.109 inches
Overall Width:
4.844 inches
Fragility Factor:
Moderately rugged
Pole Quantity:
3
Arc Quenching Method:
Magnetic blowout
Mounting Facility Type And Quantity:
6 terminal
Storage Type:
General purpose warehouse
Features Provided:
Adjustable trip release
Maximum Continuous Load Current Rating Per Pole:
800.0 amperes ac all locations and 800.0 amperes dc all locations
Operating Voltage Type And Rating Per Pole In Volts:
500.0 ac all locations and 250.0 dc all locations
Circuit Protection Type:
Overcurrent all locations
Trip Release Method:
Thermal-magnetic all locations
Trip Release Characteristic:
Instantaneous all locations
Ultimate Trip Rating Of Continuous Current Rating Per Pole In Percent:
125.0 all locations
Manual Actuator Type And Quantity:
1 toggle
Actuator Function:
Trip-reset
Actuator Position Designation:
At pole two
Adjustable Trip Setting Current Range Per Pole In Amps:
+3200.0/+5600.0 ac all locations and +3200.0/+5600.0 dc all locations
Adjustable Trip Setting Current Range Per Pole In Amps:
+3200.0 to 5600.0 ac and +3200.0/+5600.0 dc all locations
Trip Release Ambient Tempurature Rating:
50.0 degrees celsius all locations
Frequency In Hertz:
60.0 all locations
Unpackaged Unit Weight:
4.100 pounds
Terminal Type And Quantity:
6 turret
NSN:
5925-00-058-4564
Item Name:
Circuit Breaker Tripping Unit
Cage Code:
30086

Cross Referenced Parts

No other part numbers with same form, fit, and function found.

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Catalog Drilldown
--- Electrical And Electronic Equipment Components
------ Circuit Breakers
--------- Circuit Breaker Trippers
------------ P/N ETN8257

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Last Updated: 08/14/2025