The Circuit Breaker, cataloged under National Stock Number 5925-00-251-1270, is classified within Federal Supply Class 5925 (No Item Name Available) of the Electrical and Electronic Equipment Components group. The primary manufacturer of record is Lockheed Martin Corporation Dba Lockheed Martin Div Lockheed Martin. Government technical data includes 29 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 6 commercial cross-references from 4 manufacturers, enabling identification through both NSN and commercial part number lookups. 5 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5925-00-251-1270 |
| Primary Part Number | 537872-1 |
| Item Name | Circuit Breaker |
| FSC / FSG | 5925 / 59 — No Item Name Available |
| Manufacturer | Lockheed Martin Corporation Dba Lockheed Martin Div Lockheed Martin |
| Status | ACTIVE |
| Thread Quantity Per Inch | 32 |
| Specification/standard Data | 81349--13516/6BI GOVERNMENT SPECIFICATION |
| Storage Type | GENERAL PURPOSE WAREHOUSE |
| Fragility Factor | MODERATELY RUGGED |
| Pole Quantity | 1 |
| Center to Center Distance Between Terminals Parallel to Length | 0.780 INCHES NOMINAL IN |
| Mounting Facility Type and Quantity | 2 THREADED HOLE(S) |
| Trip Release Ambient Temp Rating | 25.0 CELSIUS NOMINAL SINGLE LOCATION DEGC |
| Internal Trip Release Configuration | SERIES TRIP SINGLE LOCATION |
| Maximum Interrupting Capacity Current Type and Rating Per Pole in Amps | 575.0 DC SINGLE LOCATION |
| Actuator Position Designation | AT POLE ONE |
| Inclosure Protection Type for Which Designed | VIBRATION RESISTANT AND SHOCK RESISTANT AND SALT SPRAY PROOF AND FUNGUS RESISTANT |
| Terminal Type and Quantity | 2 TAB W/SCREW |
| Reset Method | MANUAL |
| Actuator Function | TRIP-RESET |
| Trip Release Characteristic | TIME DELAY SINGLE LOCATION |
| Manual Actuator Type and Quantity | 1 PUSH BUTTON |
| Distance Between Centerlines of Mounting Facilities Parallel to Body Length | 1.812 INCHES NOMINAL IN |
| Mounting Surface to Terminal End Distance | 1.430 INCHES MAXIMUM IN |
| Test Data Document | 81349-MIL-C-13516 SPECIFICATION (INCLUDES ENGINEERING TYPE BULLETINS, BROCHURES,ETC., THAT REFLECT SPECIFICATION TYPE DATA IN SPECIFICATION FORMAT; EXCLUDES COMMERCIAL CATALOGS, INDUSTRY DIRECTORIES, AND SIMILAR TRADE PUBLICATIONS, REFLECTING GENERAL TYPE DATA ON CERTAIN ENVIRONMENTAL AND PERFORMANCE REQUIREMENTS AND TEST CONDITIONS THAT ARE SHOWN AS "TYPICAL", "AVERAGE", "NOMINAL", ETC.). |
| Ultimate Trip Rating of Continuous Current Rating Per Pole in Percent | 138.0 SINGLE LOCATION |
| Trip Release Method | THERMAL SINGLE LOCATION |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) |
| Body Width | 0.750 INCHES NOMINAL IN |
| Trip Delay Time in Seconds Per Rated Continuous Current | 8.000 MINIMUM AT 200 PCT AND 50.000 MAXIMUM AT 200 PCT SINGLE LOCATION |
| Maximum Continuous Load Current Rating Per Pole | 25.0 AMPERES DC SINGLE LOCATION |
| Circuit Protection Type | OVERCURRENT SINGLE LOCATION |
| Operating Voltage Type and Rating Per Pole in Volts | 28.0 DC SINGLE LOCATION |
| Nominal Thread Size | 0.138 INCHES IN |
| Acquisition Status | ACTIVE |
| HAZMAT | No |
| Part Number | Manufacturer |
|---|---|
| 537872-1 | Lockheed Martin Corporation Dba Lockheed Martin Div Lockheed Martin (USA) |
| M13516/6BI-25 | Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M |
| MIL-C-13516/6 | Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M |
| M13516/6-4 | Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M |
| 537872 | Raytheon Company (USA) |
| MS39067-4 | Military Standards Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M |
NSN 5925-00-251-1270 is a Circuit Breaker, manufactured by Lockheed Martin Corporation Dba Lockheed Martin Div Lockheed Martin, classified under FSC 5925 (No Item Name Available). Status: active.
NSN 5925-00-251-1270 has 6 cross-referenced part numbers: 537872-1 (Lockheed Martin Corporation Dba Lockheed Martin Div Lockheed Martin), M13516/6BI-25 (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M), MIL-C-13516/6 (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M), M13516/6-4 (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M), 537872 (Raytheon Company) and 1 more.
There are 5 known substitutes for 5925-00-251-1270: 5925-00-109-1793, 5925-00-253-0096, 1610-00-717-8397 and 2 more. Verify interchangeability with system specifications before substitution.
Key specifications for 537872-1: Thread Quantity Per Inch: 32; Specification/standard Data: 81349--13516/6BI GOVERNMENT SPECIFICATION; Storage Type: GENERAL PURPOSE WAREHOUSE; Fragility Factor: MODERATELY RUGGED. 30 total characteristics are documented in the Federal Logistics Information System.