The Transistor, cataloged under National Stock Number 5961-01-540-7801, 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 Fairchild Semiconductor Corporation. Government technical data includes 8 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5961-01-540-7801 |
| Primary Part Number | MMBTA56 |
| Item Name | Transistor |
| FSC / FSG | 5961 / 59 — Semiconductor Devices and Associated Hardware |
| Manufacturer | Fairchild Semiconductor Corporation |
| Status | ACTIVE |
| Voltage Rating in Volts Per Characteristic | 4.0 MAXIMUM COLLECTOR TO BASE VOLTAGE/STATIC/EMITTER OPEN |
| Mounting Facility Quantity | 3 |
| Mounting Method | TERMINAL |
| Semiconductor Material | SILICON |
| Current Rating Per Characteristic | 500.00 MILLIAMPERES MAXIMUM COLLECTOR CURRENT, DC |
| Material | PLASTIC ENCLOSURE |
| Terminal Type and Quantity | 3 PIN |
| Power Rating Per Characteristic | 5.0 MILLIWATTS MAXIMUM OFF-STATE 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 |
|---|---|
| MMBTA56 PRIMARY | Fairchild Semiconductor Corporation (USA) |
| Reference | Meaning |
|---|---|
| T5961-0061-001 | 7/2 Vendor item drawing reference Telephonics Corp |
NSN 5961-01-540-7801 is a Transistor, manufactured by Fairchild Semiconductor Corporation, classified under FSC 5961, Semiconductor Devices and Associated Hardware. Status: active.
NSN 5961-01-540-7801 has 1 manufacturer part number on file: MMBTA56 (Fairchild Semiconductor Corporation).
Key specifications for MMBTA56: Voltage Rating in Volts Per Characteristic: 4.0 MAXIMUM COLLECTOR TO BASE VOLTAGE/STATIC/EMITTER OPEN; Mounting Facility Quantity: 3; Mounting Method: TERMINAL; Semiconductor Material: SILICON. 8 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.