The Resistor,variable,nonwire Wound,, cataloged under National Stock Number 5905-01-169-4103, is classified within Federal Supply Class 5905 (Resistor) of the Electrical and Electronic Equipment Components group. The manufacturer of record is Bi Technologies Corporation Div Bi Technologies Corp.. Government technical data includes 28 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 4 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5905-01-169-4103 |
| Primary Part Number | 78SR50K |
| Item Name | Resistor,variable,nonwire Wound, |
| FSC / FSG | 5905 / 59 — Resistor |
| Manufacturer | Bi Technologies Corporation Div Bi Technologies Corp. |
| Status | ACTIVE |
| Maximum Running Torque | 8.00 INCH-OUNCES IN |
| Electrical Resistance Per Section | 50.000 KILOHMS SINGLE SECTION |
| Ambient Temp in Deg Celsius Per Section at Zero Percent Rated Power | 125.0 SINGLE SECTION |
| Section Quantity | 1 |
| Mounting Facility Quantity | 2 |
| Shaft Diameter | 0.100 INCHES NOMINAL IN |
| Body Style | RECTANGULAR W/MOUNTING HOLES/SLOTS |
| Mounting Method | UNTHREADED HOLE(S) |
| Body Width | 0.195 INCHES NOMINAL IN |
| Body Height | 0.320 INCHES NOMINAL IN |
| Maximum Starting Torque | 8.00 INCH-OUNCES IN |
| Mounting Hole Diameter | 0.093 INCHES NOMINAL IN |
| Temp Coefficient of Resistance Per Section in Ppm Per Deg Celsius | -100.0 TO 100.0 SINGLE SECTION |
| Terminal Location | RADIALLY POSITIONED OVER LESS THAN HALF THE CIRCUMFERENCE |
| Shaft Style | ROUND, SLOTTED |
| Actuator Type | SINGLE SHAFT |
| Lateral Distance Between Mounting Hole Centers | 1.000 INCHES NOMINAL IN |
| Shaft Length | 0.070 INCHES NOMINAL IN |
| Body Length | 1.250 INCHES NOMINAL IN |
| Power Dissipation Rating Per Section in Watts | 0.75 FREE AIR SINGLE SECTION |
| Effective Electrical Rotation in Deg Angular Rotation | 7920.0 NOMINAL |
| Reliability Indicator | NOT ESTABLISHED |
| Cubic Measure | 0.078 CUBIC INCHES |
| Actuator Travel Control Feature | CLUTCH |
| Resistance Tolerance Per Section in Percent | -10.0 TO 10.0 SINGLE SECTION |
| Terminal Type and Quantity | 3 WIRE LOOP |
| Rotary Actuator Travel in Angular Deg | 7920.0 NOMINAL |
| Ambient Temp in Deg Celsius Per Section at Full Rated Power | 70.0 SINGLE SECTION |
| 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 |
|---|---|
| 78SR50K | Bi Technologies Corporation Div Bi Technologies Corp. (USA) |
| Reference | Meaning |
|---|---|
| 14293 | 3/9 Design control — primary reference Extel Corp |
NSN 5905-01-169-4103 is a Resistor,variable,nonwire Wound,, manufactured by Bi Technologies Corporation Div Bi Technologies Corp., classified under FSC 5905, Resistor. Status: active.
NSN 5905-01-169-4103 has 1 manufacturer part number on file: 78SR50K (Bi Technologies Corporation Div Bi Technologies Corp.).
4 possible matches (shared part number, not a government interchangeability claim): 5950-01-227-1431, 6110-01-467-4693, 5310-01-691-8894. Verify interchangeability with system specifications before substitution.
Key specifications for 78SR50K: Maximum Running Torque: 8.00 INCH-OUNCES IN; Electrical Resistance Per Section: 50.000 KILOHMS SINGLE SECTION; Ambient Temp in Deg Celsius Per Section at Zero Percent Rated Power: 125.0 SINGLE SECTION; Section Quantity: 1. 28 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.