The Resistor,thermal, cataloged under National Stock Number 5905-00-642-3801, 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 20 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 5905-00-642-3801 |
| Primary Part Number | 22D1 |
| Item Name | Resistor,thermal |
| FSC / FSG | 5905 / 59 — Resistor |
| Manufacturer | Measurement Specialties, Inc. |
| Status | ACTIVE |
| Temp Points for Resistance Readings at Zero Power | -40.0 CELSIUS FIRST RESISTANCE-TEMPERATURE POINT DEGC |
| Temp Points for Resistance Readings at Zero Power | 55.0 CELSIUS SECOND RESISTANCE-TEMPERATURE POINT DEGC |
| Inclosure Type | ENCAPSULATED |
| Terminal Diameter | 0.023 INCHES NOMINAL IN |
| Resistance Tolerance at a Specified Temp in Percent | -10.0 TO 10.0 ALL RESISTANCE-TEMPERATURE POINTS |
| Terminal Length | 3.750 INCHES NOMINAL IN |
| Zero Power Resistance at Specified Temp | 70.0 OHMS SECOND RESISTANCE-TEMPERATURE POINT |
| Zero Power Resistance at Specified Temp | 8.8 KILOHMS FIRST RESISTANCE-TEMPERATURE POINT |
| Body Outside Diameter | 0.580 INCHES NOMINAL IN |
| Body Width | 0.312 INCHES NOMINAL IN |
| Reference Temp in Deg Celsius | 25.0 |
| Style Designator | DISK |
| Power Dissipation Constant in Milliwatts Per Deg Celsius | 400.0 |
| Zero Power Resistance | 228.000 OHMS |
| Thermal Time Constant in Seconds | 70.0 |
| Ambient Temp at Full Rated Power | 125.0 CELSIUS DEGC |
| Zero Power Resistance Tolerance in Percent at Reference Temp | -10.0 TO 10.0 |
| Maximum Operating Temp | 175.0 CELSIUS DEGC |
| Reliability Indicator | NOT ESTABLISHED |
| Terminal Type and Quantity | 2 WIRE LEAD |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
NSN 5905-00-642-3801 is a Resistor,thermal, manufactured by Measurement Specialties, Inc., classified under FSC 5905, Resistor. Status: active.
NSN 5905-00-642-3801 has 2 manufacturer part numbers on file: 2099188G1 (L3harris Technologies, Inc.), 22D1 (Measurement Specialties, Inc.).
1 possible match (shared part number, not a government interchangeability claim): 2090-01-285-8097. Verify interchangeability with system specifications before substitution.
Key specifications for 22D1: Temp Points for Resistance Readings at Zero Power: -40.0 CELSIUS FIRST RESISTANCE-TEMPERATURE POINT DEGC; Temp Points for Resistance Readings at Zero Power: 55.0 CELSIUS SECOND RESISTANCE-TEMPERATURE POINT DEGC; Inclosure Type: ENCAPSULATED; Terminal Diameter: 0.023 INCHES NOMINAL IN. 20 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.