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Circuit Breaker

Model / MPN: CD4-Z256-1 | NSN: 5925-01-146-0431
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
5925-01-146-0431
Sold in multiples of
1 EA
DEMIL
NO
Body Style
Multipole-multiple actuator type
Mounting Slot Width
0.164 inches
Body Length
5.844 inches
Body Width
4.128 inches
Case Material
Plastic
Center To Center Distance Between Terminals Parallel To Length
3.546 inches
Center To Center Distance Between Terminals Parallel To Width
1.032 inches
Distance Between Centerlines Of Mounting Facilities Parallel To Body Length
2.750 inches
Distance Between Centerlines Of Mounting Facilities Parallel To Body Width
1.032 inches
Fragility Factor
Moderately rugged
Boss Height
0.218 inches
Mounting Surface To Terminal End Distance
2.609 inches
Pole Quantity
4
Arc Quenching Method
Magnetic blowout
Mounting Facility Type And Quantity
8 threaded hole and 8 slot
Storage Type
General purpose warehouse
Special Handling Feature
Magnetic
Thready Qty Per Inch (tpi)
32
Maximum Continuous Load Current Rating Per Pole
40.0 amperes ac third location
Maximum Continuous Load Current Rating Per Pole
40.0 amperes ac first location
Maximum Continuous Load Current Rating Per Pole
40.0 amperes ac second location
Operating Voltage Type And Rating Per Pole In Volts
250.0 ac second location
Operating Voltage Type And Rating Per Pole In Volts
250.0 ac first location
Operating Voltage Type And Rating Per Pole In Volts
250.0 ac third location
Operating Voltage Type And Rating Per Pole In Volts
36.0 dc fourth location
Maximum Interrupting Capacity Current Type And Rating Per Pole In Amps
5000.0 ac first location
Maximum Interrupting Capacity Current Type And Rating Per Pole In Amps
5000.0 ac third location
Maximum Interrupting Capacity Current Type And Rating Per Pole In Amps
5000.0 ac second location
Circuit Protection Type
Overcurrent first location
Circuit Protection Type
Overcurrent second location
Circuit Protection Type
Overcurrent third location
Circuit Protection Type
Undervoltage fourth location
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
150.0 first location
Ultimate Trip Rating Of Continuous Current Rating Per Pole In Percent
150.0 second location
Ultimate Trip Rating Of Continuous Current Rating Per Pole In Percent
150.0 third location
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
Internal Trip Release Configuration
Series trip all locations
Thread Size
0.138 inches
Trip Delay Time In Seconds Per Rated Continuous Current
0.300 at 200 pct first location and 100.000 at 200 pct first location
Trip Delay Time In Seconds Per Rated Continuous Current
0.300 at 200 pct second location and 100.000 at 200 pct second location
Trip Delay Time In Seconds Per Rated Continuous Current
0.300 at 200 pct third location and 100.000 at 200 pct third location
Inclosure Protection Type For Which Designed
Fungus resistant
Frequency In Hertz
400.0 first location
Frequency In Hertz
400.0 second location
Frequency In Hertz
400.0 third location
Test Data Document
80063-sm-b-813283 drawing (this is the basic governing drawing, such as a contractor drawing, original equipment manufacturer drawing, etc.; excludes any specification, standard or other document that may be referenced in a basic governing drawing)
Thread Series Designator
Unc
Terminal Type And Quantity
8 screw

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CD4-Z256-1 Cross Reference
  • SM-B-813283
  • CD4-Z72-1 MODIFIED