The Circuit Breaker, cataloged under National Stock Number 5925-00-431-3256, is classified within Federal Supply Class 5925 (Circuit Breakers) of the Electrical and Electronic Equipment Components group. The manufacturer of record is Sae International Dba Sae International. Government technical data includes 29 specifications, cited from the U.S. Government catalog. The record lists 5 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 19 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5925-00-431-3256 |
| Primary Part Number | MS3320-15 |
| Item Name | Circuit Breaker |
| FSC / FSG | 5925 / 59 — Circuit Breakers |
| Manufacturer | Sae International Dba Sae International |
| Status | ACTIVE |
| Bushing Length | 0.250 INCHES NOMINAL IN |
| Reset Method | MANUAL |
| Internal Trip Release Configuration | SERIES TRIP SINGLE LOCATION |
| Operating Voltage Type and Rating Per Pole in Volts | 200.0 AC SINGLE LOCATION |
| Mounting Facility Type and Quantity | 1 THREADED BUSHING |
| Actuator Position Designation | AT POLE ONE |
| Frequency in Hertz | 400.0 SINGLE LOCATION |
| Body Style | SINGLE POLE TYPE |
| Ultimate Trip Rating of Continuous Current Rating Per Pole in Percent | 138.0 SINGLE LOCATION |
| Circuit Protection Type | OVERCURRENT SINGLE LOCATION |
| Body Width | 0.593 INCHES MAXIMUM IN |
| Pole Quantity | 1 |
| Mounting Surface to Terminal End Distance | 1.343 INCHES MAXIMUM IN |
| Maximum Continuous Load Current Rating Per Pole | 15.0 AMPERES AC SINGLE LOCATION |
| Trip Release Characteristic | TIME DELAY SINGLE LOCATION |
| Maximum Interrupting Capacity Current Type and Rating Per Pole in Amps | 2500.0 AC SINGLE LOCATION |
| Nominal Thread Size | 0.438 INCHES IN |
| Body Length | 0.781 INCHES MAXIMUM IN |
| Trip Delay Time in Seconds Per Rated Continuous Current | 5.000 MINIMUM AT 200 PCT AND 15.000 MAXIMUM AT 200 PCT SINGLE LOCATION |
| Manual Actuator Type and Quantity | 1 PUSH-PULL |
| Inclosure Protection Type for Which Designed | EXPLOSION RESISTANT AND MOISTURE RESISTANT |
| Thread Quantity Per Inch | 32 |
| Actuator Function | TRIP-RESET |
| Trip Release Ambient Temp Rating | 25.0 CELSIUS NOMINAL SINGLE LOCATION DEGC |
| Terminal Type and Quantity | 2 SCREW |
| Main Contact Tripping Mechanism Type | TRIP FREE |
| Thread Series Designator | UN |
| Trip Release Method | THERMAL SINGLE LOCATION |
| Center to Center Distance Between Terminals Parallel to Length | 0.500 INCHES NOMINAL IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | Possible hazard — SDS may be required (DLA HMIC P) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 870SS0056 | Leonardo S.p.a. - Electronics Division - Defence Business Area (ITA) |
| 16100025967 | Mbda Italia Spa Dba Mbda (ITA) |
| MS3320-15 PRIMARY | Sae International Dba Sae International (USA) |
| 870SS0056 | Rosomak S.a (POL) |
| MS3320-15 | Leonardo Spa Helicopters Division - Production Site (ITA) |
| Reference | Meaning |
|---|---|
| 10135257 | 6/9 Informative reference only Nimikkeistokeskus Ncb Finland |
| 4310-001-15 | 5/1 Secondary reference Genelco Industries Inc. Dba Genelco Industries |
| 5925PL1817078 | 6/9 Informative reference only Jednolity Indeks Materialowy - Uniform Material Index |
| MS3320-15 | 5/1 Secondary reference Flame Enterprises, Inc. Dba Flame Enterprises Inc |
| AS58091 | 5/9 Secondary reference Sae International Dba Sae International |
| 5925PL1609952 | 6/9 Informative reference only Jednolity Indeks Materialowy - Uniform Material Index |
| MS3320-15 | C/1 Advisory reference — outside the item-of-supply concept U.S. Government activity |
| SAE-AS58091 | 3/1 Design control — primary reference Sae International Dba Sae International |
| MS3320-15 | 5/9 Secondary reference U.S. Government activity |
| MS3320-15 | 5/1 Secondary reference Wesco Aircraft Hardware Corp. Dba Wesco Aircraft Div Electronic Products |
| MS3320-15 | 5/9 Secondary reference U.S. Government activity |
| MIL-C-5809 | 5/9 Secondary reference U.S. Government activity |
| AS58091 | 5/9 Secondary reference U.S. Government activity |
| 5925PL0649304 | 6/9 Informative reference only Jednolity Indeks Materialowy - Uniform Material Index |
| AS33201 | 5/9 Secondary reference Sae International Dba Sae International |
| 4310-001-15 | C/1 Advisory reference — outside the item-of-supply concept Safran Electrical & Power Usa, Llc Dba Labinal Power Sysyems Use CAGE Code 81640 for Cataloging |
| MS3320-15 | 5/1 Secondary reference U.S. Government activity |
| MS3320-15 | 5/1 Secondary reference Genelco Industries Inc. Dba Genelco Industries |
| AS33201 | 5/9 Secondary reference U.S. Government activity |
NSN 5925-00-431-3256 is a Circuit Breaker, manufactured by Sae International Dba Sae International, classified under FSC 5925, Circuit Breakers. Status: active.
NSN 5925-00-431-3256 has 5 manufacturer part numbers on file: 870SS0056 (Leonardo S.p.a. - Electronics Division - Defence Business Area), 16100025967 (Mbda Italia Spa Dba Mbda), MS3320-15 (Sae International Dba Sae International), 870SS0056 (Rosomak S.a), MS3320-15 (Leonardo Spa Helicopters Division - Production Site).
2 possible matches (shared part number, not a government interchangeability claim): 5925-00-452-1270, 5925-00-468-2757. Verify interchangeability with system specifications before substitution.
Key specifications for MS3320-15: Bushing Length: 0.250 INCHES NOMINAL IN; Reset Method: MANUAL; Internal Trip Release Configuration: SERIES TRIP SINGLE LOCATION; Operating Voltage Type and Rating Per Pole in Volts: 200.0 AC SINGLE LOCATION. 29 specifications are documented in the U.S. Government catalog.
Possible hazard — SDS may be required (DLA HMIC P). Hazard information on this page is shown exactly as it appears in the DLA record.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-16.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.