The Resistor,thermal, cataloged under National Stock Number 5905-01-050-4466, is classified within Federal Supply Class 5905 (Resistor) of the Electrical and Electronic Equipment Components group. The manufacturer of record is Measurement Specialties, Inc.. Government technical data includes 13 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5905-01-050-4466 |
| Primary Part Number | 21E1 |
| Item Name | Resistor,thermal |
| FSC / FSG | 5905 / 59 — Resistor |
| Manufacturer | Measurement Specialties, Inc. |
| Status | ACTIVE |
| Inclosure Type | ENCAPSULATED |
| Body Outside Diameter | 0.400 INCHES NOMINAL IN |
| Body Width | 0.225 INCHES NOMINAL IN |
| Reference Temp in Deg Celsius | 25.0 |
| Style Designator | PLAIN DISK |
| Power Dissipation Constant in Milliwatts Per Deg Celsius | 10.0 |
| Zero Power Resistance | 100.000 OHMS |
| Thermal Time Constant in Seconds | 75.0 |
| Ambient Temp at Full Rated Power | 25.0 CELSIUS DEGC |
| Zero Power Resistance Tolerance in Percent at Reference Temp | -10.0 TO 10.0 |
| Maximum Operating Temp | 200.0 CELSIUS DEGC |
| Reliability Indicator | NOT ESTABLISHED |
| Terminal Type and Quantity | 2 SURFACE CONTACT |
| 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 |
|---|---|
| 21E1 PRIMARY | Measurement Specialties, Inc. (USA) |
| Reference | Meaning |
|---|---|
| 21E1 | 5/9 Secondary reference U.S. Government activity |
NSN 5905-01-050-4466 is a Resistor,thermal, manufactured by Measurement Specialties, Inc., classified under FSC 5905, Resistor. Status: active.
NSN 5905-01-050-4466 has 1 manufacturer part number on file: 21E1 (Measurement Specialties, Inc.).
Key specifications for 21E1: Inclosure Type: ENCAPSULATED; Body Outside Diameter: 0.400 INCHES NOMINAL IN; Body Width: 0.225 INCHES NOMINAL IN; Reference Temp in Deg Celsius: 25.0. 13 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.