The Fuse,cartridge, cataloged under National Stock Number 5920-00-142-7342, is classified within Federal Supply Class 5920 (Fuses, Arrestors, Absorbers, and Protectors) of the Electrical and Electronic Equipment Components group. The manufacturer of record is Cooper Bussmann, Llc Dba Cooper Industries. 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 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 | 5920-00-142-7342 |
| Primary Part Number | ACK20 |
| Item Name | Fuse,cartridge |
| FSC / FSG | 5920 / 59 — Fuses, Arrestors, Absorbers, and Protectors |
| Manufacturer | Cooper Bussmann, Llc Dba Cooper Industries |
| Status | ACTIVE |
| Continuous Current Rating in Amps | 20.000 |
| Circuit Over-Current Interruption Delay Time in Seconds | 100.0 200 PCT OF CURRENT RATING AND 300.0 300 PCT OF CURRENT RATING AND 500.0 500 PCT OF CURRENT RATING |
| Overall Diameter | 0.562 INCHES NOMINAL IN |
| Center to Center Distance Between Mounting Facilities Parallel to Length | 2.500 INCHES NOMINAL IN |
| Features Provided | NONRENEWABLE FUSIBLE ELEMENT |
| Maximum Voltage Rating in Volts | 125.0 AC AND 125.0 DC |
| Circuit Over-Current Interruption Type | TIME DELAY |
| Mounting Slot Width | 0.266 INCHES NOMINAL IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | Possible hazard — SDS may be required (DLA HMIC P) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| ACK20 PRIMARY | Cooper Bussmann, Llc Dba Cooper Industries (USA) |
NSN 5920-00-142-7342 is a Fuse,cartridge, manufactured by Cooper Bussmann, Llc Dba Cooper Industries, classified under FSC 5920, Fuses, Arrestors, Absorbers, and Protectors. Status: active.
NSN 5920-00-142-7342 has 1 manufacturer part number on file: ACK20 (Cooper Bussmann, Llc Dba Cooper Industries).
1 possible match (shared part number, not a government interchangeability claim): 4940-00-759-1882. Verify interchangeability with system specifications before substitution.
Key specifications for ACK20: Continuous Current Rating in Amps: 20.000; Circuit Over-Current Interruption Delay Time in Seconds: 100.0 200 PCT OF CURRENT RATING AND 300.0 300 PCT OF CURRENT RATING AND 500.0 500 PCT OF CURRENT RATING; Overall Diameter: 0.562 INCHES NOMINAL IN; Center to Center Distance Between Mounting Facilities Parallel to Length: 2.500 INCHES NOMINAL IN. 8 specifications are documented in the U.S. Government catalog.
Possible hazard — SDS may be required (DLA HMIC P). 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.