The Transistor, cataloged under National Stock Number 5961-00-034-5874, 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 Silicon Transistor Corporation Dba Same. Government technical data includes 15 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through both NSN and commercial part number lookups. 6 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government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 | 5961-00-034-5874 |
| Primary Part Number | 2N2157 |
| Item Name | Transistor |
| FSC / FSG | 5961 / 59 — Semiconductor Devices and Associated Hardware |
| Manufacturer | Silicon Transistor Corporation Dba Same |
| Status | ACTIVE |
| Voltage Rating in Volts Per Characteristic | 60.0 MAXIMUM BREAKDOWN VOLTAGE, COLLECTOR-TO-BASE, EMITTER OPEN AND 30.0 MAXIMUM BREAKDOWN VOLTAGE, EMITTER-TO-BASE, COLLECTOR OPEN AND 45.0 MAXIMUM BREAKDOWN VOLTAGE, COLLECTOR-TO-EMITTER, BASE OPEN |
| Maximum Operating Temp Per Measurement Point | 125.0 CELSIUS JUNCTION DEGC |
| Mounting Facility Quantity | 1 |
| Overall Diameter | 1.250 INCHES MAXIMUM IN |
| Mounting Method | THREADED STUD(S) |
| Semiconductor Material | SILICON |
| Internal Configuration | JUNCTION CONTACT |
| Features Provided | HERMETICALLY SEALED CASE |
| Nominal Thread Size | 0.190 INCHES IN |
| Current Rating Per Characteristic | 30.00 AMPERES MAXIMUM COLLECTOR CURRENT, DC AND 30.00 AMPERES MAXIMUM BASE CURRENT, DC |
| Specification/standard Data | 80131-RELEASE3481 PROFESSIONAL/INDUSTRIAL ASSOCIATION SPECIFICATION |
| Terminal Type and Quantity | 2 TAB, SOLDER LUG AND 1 THREADED STUD |
| Thread Series Designator | UNF |
| Electrode Internally-Electrically Connected to Case | COLLECTOR |
| Power Rating Per Characteristic | 170.0 WATTS MAXIMUM COLLECTOR 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 |
|---|---|
| 2N2157 PRIMARY | Silicon Transistor Corporation Dba Same (USA) |
| Reference | Meaning |
|---|---|
| 2N2157 | C/1 Advisory reference — outside the item-of-supply concept On Semiconductor Corporation |
| 2N2157 | 5/9 Secondary reference U.S. Government activity |
| RELEASE3481 | 5/9 Secondary reference U.S. Government activity |
| 2N2157 | 5/9 Secondary reference Electronic Transistors Corp |
| 2N2157 | 5/9 Secondary reference Freescale Semiconductor, Inc. |
| 014-578 | 5/9 Secondary reference U.S. Government activity |
NSN 5961-00-034-5874 is a Transistor, manufactured by Silicon Transistor Corporation Dba Same, classified under FSC 5961, Semiconductor Devices and Associated Hardware. Status: active.
NSN 5961-00-034-5874 has 1 manufacturer part number on file: 2N2157 (Silicon Transistor Corporation Dba Same).
2 possible matches (shared part number, not a government interchangeability claim): 5961-00-944-0977, 5961-00-988-7667. Verify interchangeability with system specifications before substitution.
Key specifications for 2N2157: Voltage Rating in Volts Per Characteristic: 60.0 MAXIMUM BREAKDOWN VOLTAGE, COLLECTOR-TO-BASE, EMITTER OPEN AND 30.0 MAXIMUM BREAKDOWN VOLTAGE, EMITTER-TO-BASE, COLLECTOR OPEN AND 45.0 MAXIMUM BREAKDOWN VOLTAGE, COLLECTOR-TO-EMITTER, BASE OPEN; Maximum Operating Temp Per Measurement Point: 125.0 CELSIUS JUNCTION DEGC; Mounting Facility Quantity: 1; Overall Diameter: 1.250 INCHES MAXIMUM IN. 15 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.