The Transistor, cataloged under National Stock Number 5961-01-581-0616, 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 Stmicroelectronics Inc. Government technical data includes 12 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5961-01-581-0616 |
| Primary Part Number | BU931 |
| Item Name | Transistor |
| FSC / FSG | 5961 / 59 — Semiconductor Devices and Associated Hardware |
| Manufacturer | Stmicroelectronics Inc |
| Status | ACTIVE |
| Voltage Rating in Volts Per Characteristic | 400.0 NOMINAL REACH THROUGH VOLTAGE |
| Maximum Operating Temp Per Measurement Point | 200.0 CELSIUS JUNCTION DEGC |
| Mounting Facility Quantity | 2 |
| Joint Electronic Device Engineering Council/jedec/case Outline Designation | TO-3 |
| Overall Diameter | 25.00 MILLIMETERS MINIMUM AND 26.00 MILLIMETERS MAXIMUM MM |
| Mounting Method | UNTHREADED HOLE(S) |
| Transfer Ratio | 300.0 MINIMUM STATIC FORWARD CURRENT TRANSFER RATIO, COMMON-EMITTER AND 2.0 MAXIMUM STATIC FORWARD CURRENT TRANSFER RATIO, COMMON-EMITTER |
| Internal Junction Configuration | NPN |
| Semiconductor Material | SILICON |
| Current Rating Per Characteristic | 15.00 AMPERES NOMINAL FORWARD CURRENT, AVERAGE |
| Terminal Type and Quantity | 2 PIN |
| Power Rating Per Characteristic | 175.0 WATTS MAXIMUM TOTAL POWER 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 |
|---|---|
| BU931 PRIMARY | Stmicroelectronics Inc (USA) |
NSN 5961-01-581-0616 is a Transistor, manufactured by Stmicroelectronics Inc, classified under FSC 5961, Semiconductor Devices and Associated Hardware. Status: active.
NSN 5961-01-581-0616 has 1 manufacturer part number on file: BU931 (Stmicroelectronics Inc).
Key specifications for BU931: Overall Height: 19.32 MILLIMETERS MINIMUM AND 22.02 MILLIMETERS MAXIMUM MM; Voltage Rating in Volts Per Characteristic: 400.0 NOMINAL REACH THROUGH VOLTAGE; Maximum Operating Temp Per Measurement Point: 200.0 CELSIUS JUNCTION DEGC; Mounting Facility Quantity: 2. 12 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.