The Transistor, cataloged under National Stock Number 5961-01-439-2392, 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 Microsemi Corp - Massachusetts. Government technical data includes 11 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5961-01-439-2392 |
| Primary Part Number | PK4478 |
| Item Name | Transistor |
| FSC / FSG | 5961 / 59 — Semiconductor Devices and Associated Hardware |
| Manufacturer | Microsemi Corp - Massachusetts |
| Status | ACTIVE |
| Voltage Rating in Volts Per Characteristic | 30.0 MAXIMUM DRAIN TO GATE VOLTAGE AND 30.00 MAXIMUM DRAIN TO SOURCE VOLTAGE AND 30.0 MAXIMUM DRAIN TO SUBSTRATE VOLTAGE |
| Maximum Operating Temp Per Measurement Point | 150.0 CELSIUS JUNCTION DEGC |
| Mounting Method | COMPRESSION |
| Semiconductor Material | SILICON |
| Internal Configuration | FIELD EFFECT |
| Current Rating Per Characteristic | 50.00 MILLIAMPERES MAXIMUM DRAIN CURRENT |
| Precious Material and Location | PLATED LEADS GOLD |
| Test Data Document | 04655-13-2728240 DRAWING (THIS IS THE BASIC GOVERNING DRAWING, SUCH AS A CONTRACTOR DRAWING, ORIGINAL EQUIPMENT MANUFACTURER DRAWING, ETC.; EXCLUDES ANY SPECIFICATION, STANDARD OR OTHER DOCUMENT THAT MAY BE REFERENCED IN A BASIC GOVERNING DRAWING) |
| Material | CERAMIC ENCLOSURE |
| Terminal Type and Quantity | 16 CASE |
| Power Rating Per Characteristic | 1.2 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 |
|---|---|
| PK4478 PRIMARY | Microsemi Corp - Massachusetts (USA) |
| 13-2728240-1 | General Dynamics Mission Systems, Inc. (USA) |
| Reference | Meaning |
|---|---|
| PK4478 | 5/9 Secondary reference Sertech Laboratories Inc/ Micro Uspd Dba Microsemi Corp Div Microsemi Watertown |
NSN 5961-01-439-2392 is a Transistor, manufactured by Microsemi Corp - Massachusetts, classified under FSC 5961, Semiconductor Devices and Associated Hardware. Status: active.
NSN 5961-01-439-2392 has 2 manufacturer part numbers on file: PK4478 (Microsemi Corp - Massachusetts), 13-2728240-1 (General Dynamics Mission Systems, Inc.).
Key specifications for PK4478: Overall Height: 0.065 INCHES MAXIMUM IN; Voltage Rating in Volts Per Characteristic: 30.0 MAXIMUM DRAIN TO GATE VOLTAGE AND 30.00 MAXIMUM DRAIN TO SOURCE VOLTAGE AND 30.0 MAXIMUM DRAIN TO SUBSTRATE VOLTAGE; Maximum Operating Temp Per Measurement Point: 150.0 CELSIUS JUNCTION DEGC; Mounting Method: COMPRESSION. 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.