The Transistor, cataloged under National Stock Number 5961-01-442-2124, 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 Keysight Technologies Inc. Government technical data includes 8 specifications, cited from the U.S. Government catalog. The record lists 4 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through both NSN and commercial part number lookups. 6 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 5961-01-442-2124 |
| Primary Part Number | 1853-0581 |
| Item Name | Transistor |
| FSC / FSG | 5961 / 59 — Semiconductor Devices and Associated Hardware |
| Manufacturer | Keysight Technologies Inc |
| Status | ACTIVE |
| Voltage Rating in Volts Per Characteristic | 150.0 MINIMUM BREAKDOWN VOLTAGE, COLLECTOR-TO-EMITTER, BASE OPEN |
| Mounting Method | TERMINAL |
| Semiconductor Material | SILICON |
| Internal Configuration | JUNCTION CONTACT |
| Current Rating Per Characteristic | 500.00 MILLIAMPERES MAXIMUM COLLECTOR CURRENT, DC |
| Material | PLASTIC ENCLOSURE |
| Terminal Type and Quantity | 3 PRINTED CIRCUIT |
| Power Rating Per Characteristic | 350.0 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 |
|---|---|
| MMBT5401LXXG | Semiconductor Components Industries, Llc Dba Semiconductor Components Industries Llc Div Corporate Headquarters (USA) |
| MMBT5401LT1G | Semiconductor Components Industries, Llc Dba Semiconductor Components Industries Llc Div Corporate Headquarters (USA) |
| 1853-0581/4A | Keysight Technologies Inc (USA) |
| 1853-0581 PRIMARY | Keysight Technologies Inc (USA) |
| Reference | Meaning |
|---|---|
| 1853-0581 | 3/9 Design control — primary reference Keysight Technologies, Inc. |
| MMBT5401LT1 | 5/1 Secondary reference Bae Systems Australia Limited Div Bae Systems Australia Limited |
| 1853-0581/4A | 5/9 Secondary reference Hewlett-Packard Company Dba HP |
| 1853-0581 | 5/9 Secondary reference Hewlett-Packard Company Dba HP |
| MMBT5401LT1 | 5/9 Secondary reference Freescale Semiconductor, Inc. |
| 1853-0581/4A | 5/9 Secondary reference Keysight Technologies, Inc. |
NSN 5961-01-442-2124 is a Transistor, manufactured by Keysight Technologies Inc, classified under FSC 5961, Semiconductor Devices and Associated Hardware. Status: active.
NSN 5961-01-442-2124 has 4 manufacturer part numbers on file: MMBT5401LXXG (Semiconductor Components Industries, Llc Dba Semiconductor Components Industries Llc Div Corporate Headquarters), MMBT5401LT1G (Semiconductor Components Industries, Llc Dba Semiconductor Components Industries Llc Div Corporate Headquarters), 1853-0581/4A (Keysight Technologies Inc), 1853-0581 (Keysight Technologies Inc).
1 possible match (shared part number, not a government interchangeability claim): 5961-01-524-8632. Verify interchangeability with system specifications before substitution.
Key specifications for 1853-0581: Overall Height: 1.11 MILLIMETERS MAXIMUM MM; Voltage Rating in Volts Per Characteristic: 150.0 MINIMUM BREAKDOWN VOLTAGE, COLLECTOR-TO-EMITTER, BASE OPEN; 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.