The Heating Element,electrical,nonim, cataloged under National Stock Number 4520-00-839-9148, 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 Hotwatt, Inc. Government technical data includes 10 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 4520-00-839-9148 |
| Primary Part Number | SC25-2/50W-120V/SF1-12 |
| Item Name | Heating Element,electrical,nonim |
| FSC / FSG | 4520 / 45 — Space and Water Heating Equipment |
| Manufacturer | Hotwatt, Inc |
| Status | ACTIVE |
| FSC Application Data | INNER ELEMENT,NAVIGATIONAL SET AN/ASN61 |
| Terminal Quantity | 2 |
| Length | 2.000 INCHES NOMINAL IN |
| Voltage in Volts and Current Type | 115.0 DC SINGLE VOLTAGE |
| Maximum Wattage Rating in Watts | 50.0 SINGLE VOLTAGE |
| Element Connection Style | WIRE LEAD |
| Outside Diameter | 0.250 INCHES NOMINAL IN |
| Mounting Method Style | CLAMP TYPE MOUNTING FACILITY |
| Element Radiation Spectrum | NONINFRARED |
| Material | STEEL RESISTANCE WIRE |
| 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 |
|---|---|
| SC25-2/50W-120V/SF1-12 PRIMARY | Hotwatt, Inc (USA) |
| Reference | Meaning |
|---|---|
| SC252 | 5/9 Secondary reference Hotwatt, Inc |
| 28-31000-1 | 5/9 Secondary reference U.S. Government activity |
| 28-31000-1 | 7/2 Vendor item drawing reference Textron Systems Corporation Dba Textron Systems Corp |
NSN 4520-00-839-9148 is a Heating Element,electrical,nonim, manufactured by Hotwatt, Inc, classified under FSC 4520, Space and Water Heating Equipment. Status: active.
NSN 4520-00-839-9148 has 1 manufacturer part number on file: SC25-2/50W-120V/SF1-12 (Hotwatt, Inc).
1 possible match (shared part number, not a government interchangeability claim): 5305-01-619-0499. Verify interchangeability with system specifications before substitution.
Key specifications for SC25-2/50W-120V/SF1-12: FSC Application Data: INNER ELEMENT,NAVIGATIONAL SET AN/ASN61; Terminal Quantity: 2; Length: 2.000 INCHES NOMINAL IN; Voltage in Volts and Current Type: 115.0 DC SINGLE VOLTAGE. 10 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.