The Air Conditioner, cataloged under National Stock Number 4120-01-442-3543, is classified within Federal Supply Class 4120 (Air Conditioning Equipment) of the Refrigeration, AC, and Air Circulating Equipment group. Government technical data includes 6 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 4120-01-442-3543 |
| Item Name | Air Conditioner |
| FSC / FSG | 4120 / 41 — Air Conditioning Equipment |
| Status | ACTIVE |
| Power Source | DIESEL ENGINE |
| Cooling Capacity in Btu Per Hour | 166000.0 NOMINAL |
| Wheel Quantity | 4 |
| Mounting Type | TRAILER |
| Condenser Cooling Type | AIR |
| Compressor Unit Type | OPEN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Reference | Meaning |
|---|---|
| 62000-101 | C/1 Advisory reference — outside the item-of-supply concept Drs Environmental Systems Inc |
| 62000-101 | 3/9 Design control — primary reference U.S. Government activity |
NSN 4120-01-442-3543 is a Air Conditioner, classified under FSC 4120, Air Conditioning Equipment. Status: active.
1 possible match (shared part number, not a government interchangeability claim): 4010-01-602-2293. Verify interchangeability with system specifications before substitution.
Key specifications for 4120-01-442-3543: Power Source: DIESEL ENGINE; Cooling Capacity in Btu Per Hour: 166000.0 NOMINAL; Wheel Quantity: 4; Special Features: MODEL NO. OF AIR CONDITIONER IS MA-3D; INTENDED FOR GENERAL PURPOSE AIRCONDITIONING OF AIRCRAFT AVIONICS COMPARTMENTS DURING MAINTENANCE AND PREFLIGHT PERIODS; COOLS MAINTENANCE SHELTERS, PORTABLE HANGER, ETC.; USES REFRIGERANT R-134A; PROVIDES VENT AIR OR COOL, DEHUMIDIFIED AIR AT A TEMPERATURE OF50 DEGREES F; OPERATES ON THE CONVENTIONAL VAPOR-COMPRESSION CYCLE A. 6 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.