The Resistor,thermal, cataloged under National Stock Number 5905-01-206-0538, is classified within Federal Supply Class 5905 (Resistor) of the Electrical and Electronic Equipment Components group. The manufacturer of record is Lockheed Martin Corporation Div Rms. Government technical data includes 12 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5905-01-206-0538 |
| Primary Part Number | 77C721121P001 |
| Item Name | Resistor,thermal |
| FSC / FSG | 5905 / 59 — Resistor |
| Manufacturer | Lockheed Martin Corporation Div Rms |
| Status | ACTIVE |
| Inclosure Type | ENCAPSULATED |
| Terminal Diameter | 0.025 INCHES NOMINAL IN |
| Terminal Length | 0.250 INCHES MINIMUM IN |
| Body Outside Diameter | 0.562 INCHES NOMINAL IN |
| Body Width | 0.250 INCHES NOMINAL IN |
| Style Designator | DISK |
| Zero Power Resistance | 500.000 OHMS |
| Ambient Temp at Full Rated Power | 25.0 CELSIUS DEGC |
| Zero Power Resistance Tolerance in Percent at Reference Temp | -40.0 TO 40.0 |
| Maximum Operating Temp | 125.0 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 |
| Part Number | Manufacturer |
|---|---|
| 77C721121P001 PRIMARY | Lockheed Martin Corporation Div Rms (USA) |
| 225D10103 PRIMARY | Therm-O-Disc Inc Sub of Emerson Electric Co (USA) |
NSN 5905-01-206-0538 is a Resistor,thermal, manufactured by Lockheed Martin Corporation Div Rms, classified under FSC 5905, Resistor. Status: active.
NSN 5905-01-206-0538 has 2 manufacturer part numbers on file: 77C721121P001 (Lockheed Martin Corporation Div Rms), 225D10103 (Therm-O-Disc Inc Sub of Emerson Electric Co).
Key specifications for 77C721121P001: Inclosure Type: ENCAPSULATED; Terminal Diameter: 0.025 INCHES NOMINAL IN; Terminal Length: 0.250 INCHES MINIMUM IN; Body Outside Diameter: 0.562 INCHES NOMINAL IN. 12 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.