The Semiconductor Device,diode, cataloged under National Stock Number 5961-01-449-5403, is classified within Federal Supply Class 5961 (Semiconductor Devices and Associated Hardware) of the Electrical and Electronic Equipment Components group. The manufacturer of record is Semiconductor Components Industries, Llc Dba Semiconductor Components Industries Llc Div Corporate Headquarters. Government technical data includes 7 specifications, cited from the U.S. Government catalog. The record lists 3 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 6 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5961-01-449-5403 |
| Primary Part Number | MMSZ5256B |
| Item Name | Semiconductor Device,diode |
| FSC / FSG | 5961 / 59 — Semiconductor Devices and Associated Hardware |
| Manufacturer | Semiconductor Components Industries, Llc Dba Semiconductor Components Industries Llc Div Corporate Headquarters |
| Status | ACTIVE |
| Voltage Rating in Volts Per Characteristic | 34.2 MINIMUM REGULATOR VOLTAGE, DC AND 37.8 MAXIMUM REGULATOR VOLTAGE, DC |
| Maximum Operating Temp Per Measurement Point | -55.0 CELSIUS AMBIENT AIR AND 150.0 CELSIUS AMBIENT AIR DEGC |
| Mounting Method | TERMINAL |
| Material | SILICON SEMICONDUCTOR |
| Material | PLASTIC ENCLOSURE |
| Terminal Type and Quantity | 2 PRINTED CIRCUIT |
| Power Rating Per Characteristic | 300.0 MILLIWATTS MAXIMUM TOTAL DEVICE DISSIPATION |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| MMSZ5256B | National Semiconductor Corporation (USA) |
| MMSZ5256B PRIMARY | Semiconductor Components Industries, Llc Dba Semiconductor Components Industries Llc Div Corporate Headquarters (USA) |
| MMSZ5256B | Fairchild Semiconductor Corp (USA) |
| Reference | Meaning |
|---|---|
| 381492-36 | 7/2 Vendor item drawing reference Raytheon Company |
| MMSZ5256B | 5/9 Secondary reference Microsemi Corp.-Scottsdale Dba Microsemi |
| MMSZ5256BT1 | 5/9 Secondary reference Freescale Semiconductor, Inc. |
| MMSZ5256B | C/1 Advisory reference — outside the item-of-supply concept On Semiconductor Corporation |
| MMSZ5256BTI | 5/9 Secondary reference Semiconductor Components Industries, Llc Dba Semiconductor Components Industries Llc Div Corporate Headquarters |
| MMSZ5256B | 5/9 Secondary reference Freescale Semiconductor, Inc. |
NSN 5961-01-449-5403 is a Semiconductor Device,diode, manufactured by Semiconductor Components Industries, Llc Dba Semiconductor Components Industries Llc Div Corporate Headquarters, classified under FSC 5961, Semiconductor Devices and Associated Hardware. Status: active.
NSN 5961-01-449-5403 has 3 manufacturer part numbers on file: MMSZ5256B (National Semiconductor Corporation), MMSZ5256B (Semiconductor Components Industries, Llc Dba Semiconductor Components Industries Llc Div Corporate Headquarters), MMSZ5256B (Fairchild Semiconductor Corp).
1 possible match (shared part number, not a government interchangeability claim): 5961-01-673-8054. Verify interchangeability with system specifications before substitution.
Key specifications for MMSZ5256B: Voltage Rating in Volts Per Characteristic: 34.2 MINIMUM REGULATOR VOLTAGE, DC AND 37.8 MAXIMUM REGULATOR VOLTAGE, DC; Maximum Operating Temp Per Measurement Point: -55.0 CELSIUS AMBIENT AIR AND 150.0 CELSIUS AMBIENT AIR DEGC; Mounting Method: TERMINAL; Overall Length: 0.100 INCHES MINIMUM AND 0.112 INCHES MAXIMUM IN. 7 specifications are documented in the U.S. Government catalog.
No hazard code in the DLA record (HMIC N). 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.