The Transistor, cataloged under National Stock Number 5961-00-166-3540, 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 Technology, Inc. Dba Semiconductor Technology Inc. Government technical data includes 11 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 5961-00-166-3540 |
| Primary Part Number | MJ400 |
| Item Name | Transistor |
| FSC / FSG | 5961 / 59 — Semiconductor Devices and Associated Hardware |
| Manufacturer | Semiconductor Technology, Inc. Dba Semiconductor Technology Inc |
| Status | ACTIVE |
| Voltage Rating in Volts Per Characteristic | 325.0 MAXIMUM COLLECTOR TO EMITTER VOLTAGE/STATIC/BASE OPEN AND 350.0 MAXIMUM COLLECTOR TO BASE VOLTAGE, DC AND 5.0 MAXIMUM EMITTER TO BASE VOLTAGE, INSTANTANEOUS |
| Maximum Operating Temp Per Measurement Point | 175.0 CELSIUS JUNCTION DEGC |
| Mounting Facility Quantity | 2 |
| Overall Diameter | 0.620 INCHES MAXIMUM IN |
| Mounting Method | UNTHREADED HOLE(S) |
| Semiconductor Material | SILICON |
| Internal Configuration | JUNCTION CONTACT |
| Features Provided | HERMETICALLY SEALED CASE |
| Current Rating Per Characteristic | 200.00 MILLIAMPERES MAXIMUM BASE CURRENT, DC AND 250.00 MILLIAMPERES MAXIMUM COLLECTOR CURRENT, DC |
| Terminal Type and Quantity | 2 UNINSULATED WIRE LEAD AND 1 CASE |
| Power Rating Per Characteristic | 6.7 WATTS 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 |
|---|---|
| MJ400 PRIMARY | Semiconductor Technology, Inc. Dba Semiconductor Technology Inc (USA) |
| Reference | Meaning |
|---|---|
| MJ400 | 5/9 Secondary reference Freescale Semiconductor, Inc. |
| MJ400 | 5/9 Secondary reference Silicon Transistor Corporation Dba Same |
NSN 5961-00-166-3540 is a Transistor, manufactured by Semiconductor Technology, Inc. Dba Semiconductor Technology Inc, classified under FSC 5961, Semiconductor Devices and Associated Hardware. Status: active.
NSN 5961-00-166-3540 has 1 manufacturer part number on file: MJ400 (Semiconductor Technology, Inc. Dba Semiconductor Technology Inc).
1 possible match (shared part number, not a government interchangeability claim): 6515-01-375-9025. Verify interchangeability with system specifications before substitution.
Key specifications for MJ400: Voltage Rating in Volts Per Characteristic: 325.0 MAXIMUM COLLECTOR TO EMITTER VOLTAGE/STATIC/BASE OPEN AND 350.0 MAXIMUM COLLECTOR TO BASE VOLTAGE, DC AND 5.0 MAXIMUM EMITTER TO BASE VOLTAGE, INSTANTANEOUS; Maximum Operating Temp Per Measurement Point: 175.0 CELSIUS JUNCTION DEGC; Mounting Facility Quantity: 2; Overall Diameter: 0.620 INCHES MAXIMUM IN. 11 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.