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NSN: 5925-00-001-1277
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Part Numbers

Item Number Item Description
10158805-4 Circuit Breaker
7MC3-5-25 Circuit Breaker

Master Requirement Codes

Code Translation
CPRW Denotes the action imparted by actuator operation.
CPRX An indication of the designated position of the actuator.
APNQ The means of quenching an arc.
CPRZ The function for which the auxiliary switch is designed and the number provided.
ADAQ A measurement of the longest dimension of the body, in distinction from width.
AAQL The style designation indicating the configuration that most nearly corresponds to the appearance of the body.
ADAT A measurement taken at right angles to the length of the body, in distinction from thickness.
ABXD A measurement of the longest dimension of a bushing, in distinction from width.
ADTV The element, compound, or mixture of which the case is fabricated, excluding any surface treatment.
AEBP The center to center distance between terminals parallel to the length of the item.
CPRH Indicates the type of electrical condition that will cause the device to trip.
CPLM The maximum current load that each pole is rated to carry continuously.
CPRG Indicates the type and value of the maximum short circuit current that the item will successfully interrupt, per pole, at the specified rated voltage, expressed in amperes.
AXHR Indicates the type and number of facilities by which the item is mounted.
CQJX A designation that is used for the purpose of general identification of the thread.
CPRF Indicates the type and value of operating voltage for which each pole is designed to operate, expressed in volts.
AFJN The measure of sensitivity of the item to be packaged. a factor used by packaging engineers in devising proper cushioning in a package.
CPSM The basic internal electrical configuration of the trip mechanism.
CPRR Indicates the type of mechanism provided for tripping main contacts.
CPRT Indicates the type and number of actuators provided for manual control.
CPRQ The means provided to reposition the mechanism so that the device is ready to function.
AKPX The number of poles included in the item.
BBRG Indicates the type of storage space required for an item in order to provide the degree of protection necessary to maintain serviceability standards.
CSWP The voltage, expressed in volts, and current type for which the switch is rated.
AEGJ A designation that describes the basic electrical configuration of a switch.
CSSX The amount of current, expressed in amperes, and the type for which the switch is rated.
CQSM Indicates the location of the switch in relation to its designated position.
CRTK Indicates the type of terminal for providing electrical connection to the switch.
TTQY Indicates the type and number of terminals for providing electrical connection.
CMLP The number of threads on the item per linear inch measured on a line parallel to the thread axis.
THSD A designation distinguishing one group of thread diameter-pitch combinations from another by the number of threads per measurement scale for a specific diameter.
CQWN The length of time, expressed in seconds, that an overload may exist before the device will trip at a specified continuous current.
CPRL Denotes the type of trip release action.
CPRJ The means by which the trip mechanism is released.
CPRN The continuous current rating per pole at which the device must trip in a specified time, expressed in percent.
CPRP The ultimate time per pole in which the device must trip, expressed in seconds.
AEBV The length of a straight line which passes through the center of an unthreaded mounting hole, and terminates at the circumference.

10158805-4 Circuit Breaker

Cage 82647

Technical Definition

Circuit Breaker, also referenced with federal logistics item name code 00136 - 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 element(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.

Technical Characteristics

Actuator Function (CPRW):
Trip-reset
Actuator Position Designation (CPRX):
At pole one
Arc Quenching Method (APNQ):
Magnetic blowout
Auxiliary Switch Function And Quantity (CPRZ):
1 control
Body Length (ADAQ):
1.735 inches minimum and 1.765 inches maximum
Body Style (AAQL):
Single pole type
Body Width (ADAT):
0.615 inches minimum and 0.635 inches maximum
Bushing Length (ABXD):
0.280 inches minimum and 0.300 inches maximum
Case Material (ADTV):
Metal
Center To Center Distance Between Terminals Parallel To Length (AEBP):
1.225 inches minimum and 1.255 inches maximum
Circuit Protection Type (CPRH):
Overcurrent single location
Maximum Continuous Load Current Rating Per Pole (CPLM):
25.0 amperes dc single location
Maximum Interrupting Capacity Current Type And Rating Per Pole In Amps (CPRG):
2500.0 dc single location
Mounting Facility Type And Quantity (AXHR):
1 threaded bushing
Mounting Surface To Terminal End Distance (AJWX):
1.623 inches minimum and 1.653 inches maximum
Nominal Thread Size (CQJX):
0.469 inches
Operating Voltage Type And Rating Per Pole In Volts (CPRF):
32.0 dc single location
Fragility Factor (AFJN):
Moderately rugged
Internal Trip Release Configuration (CPSM):
Series trip single location
Main Contact Tripping Mechanism Type (CPRR):
Trip free
Manual Actuator Type And Quantity (CPRT):
1 push-pull
Reset Method (CPRQ):
Manual
Pole Quantity (AKPX):
1
Storage Type (BBRG):
General purpose warehouse
Switch Voltage Rating And Type In Volts (CSWP):
28.0 dc
Switch Contact Arrangement (AEGJ):
Single pole, single throw, normally open
Switch Current Rating And Type In Amps (CSSX):
7.0 dc
Switch Location And Position Designation (CQSM):
Internal at pole one
Switch Terminal Type (CRTK):
Turret
Terminal Type And Quantity (TTQY):
2 tab, solder lug
Thread Quantity Per Inch (CMLP):
32
Thread Series Designator (THSD):
Uns
Trip Delay Time In Seconds Per Rated Continuous Current (CQWN):
0.700 minimum at 200 pct single location and 4.500 maximum at 200 pct single location
Trip Release Characteristic (CPRL):
Time delay single location
Trip Release Method (CPRJ):
Magnetic-hydraulic single location
Ultimate Trip Rating Of Continuous Current Rating Per Pole In Percent (CPRN):
135.0 single location
Ultimate Trip Time Per Pole In Seconds (CPRP):
12.000 maximum single location
Unthreaded Mounting Hole Diameter (AEBV):
0.110 inches minimum and 0.140 inches maximum

National Stock Number (NSN)

5925-00-001-1277