The Heater,space,electric, cataloged under National Stock Number 4520-01-280-3901, is classified within Federal Supply Class 4520 (Space and Water Heating Equipment) of the Plumbing, Heating, and Waste Disposal group. The manufacturer of record is Tpi Corp. Government technical data includes 15 specifications, cited from the U.S. Government catalog. The record lists 3 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 4520-01-280-3901 |
| Primary Part Number | FPQ230 |
| Item Name | Heater,space,electric |
| FSC / FSG | 4520 / 45 — Space and Water Heating Equipment |
| Manufacturer | Tpi Corp |
| Status | ACTIVE |
| Heat Delivery Rate | 10236.0 BRITISH THERMAL UNIT |
| Phase | SINGLE |
| Frequency in Hertz | 60.0 |
| Current Type | AC |
| Voltage in Volts | 240.0 |
| Heat Outlet Quantity | 1 |
| Heat Discharge Outlet Type | STATIONARY |
| Heat Delivery Direction | VERTICAL |
| Height | 18.250 INCHES NOMINAL IN |
| Depth | 4.000 INCHES NOMINAL IN |
| Width | 14.375 INCHES NOMINAL IN |
| Heat Directing Device | FIXED LOUVER |
| Mounting Type | WALL RECESSED, ROOM INTERIOR |
| Heating Element Type | ELECTRIC NONIMMERSION |
| Current Rating in Amps | 12.5 |
| 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 |
|---|---|
| HF3315TRP/FPQ2-30 | Tpi Corp (USA) |
| FPQ230 PRIMARY | Tpi Corp (USA) |
| 3UG55 | W.w. Grainger, Inc. Div Government Sales Division (USA) |
| Reference | Meaning |
|---|---|
| LFK304 | 5/9 Secondary reference Marley Engineered Products Llc |
| 2E439 | 5/9 Secondary reference W.w. Grainger, Inc. Div Government Sales Division |
| K304 | 5/9 Secondary reference Marley Engineered Products Llc |
NSN 4520-01-280-3901 is a Heater,space,electric, manufactured by Tpi Corp, classified under FSC 4520, Space and Water Heating Equipment. Status: active.
NSN 4520-01-280-3901 has 3 manufacturer part numbers on file: HF3315TRP/FPQ2-30 (Tpi Corp), FPQ230 (Tpi Corp), 3UG55 (W.w. Grainger, Inc. Div Government Sales Division).
1 possible match (shared part number, not a government interchangeability claim): 5915-01-541-9894. Verify interchangeability with system specifications before substitution.
Key specifications for FPQ230: Heat Delivery Rate: 10236.0 BRITISH THERMAL UNIT; Phase: SINGLE; Frequency in Hertz: 60.0; Current Type: AC. 15 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.