The Thermostat,defrost, cataloged under National Stock Number 5930-01-203-0991, is classified within Federal Supply Class 5930 (Switches) of the Electrical and Electronic Equipment Components group. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 5930-01-203-0991 |
| Item Name | Thermostat,defrost |
| FSC / FSG | 5930 / 59 — Switches |
| Status | ACTIVE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | Possible hazard — SDS may be required (DLA HMIC P) |
| Criticality Code | X |
| Reference | Meaning |
|---|---|
| 20640D30-62-439 | 5/2 Secondary reference U.S. Government activity |
| 56040-1 | 3/2 Design control — primary reference U.S. Government activity |
| 20640D30-62-439 | 5/9 Secondary reference Texas Instruments Inc Control Products Div |
| 56040-1 | 5/9 Secondary reference U.S. Government activity |
| 56040-1 | 3/9 Design control — primary reference Drs Environmental Systems Inc |
NSN 5930-01-203-0991 is a Thermostat,defrost, classified under FSC 5930, Switches. Status: active.
1 possible match (shared part number, not a government interchangeability claim): 8415-01-631-5379. Verify interchangeability with system specifications before substitution.
Key specifications for 5930-01-203-0991: End Item Identification: 4110-01-083-3694. 0 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.