The Synchro,control Transformer, cataloged under National Stock Number 5990-00-646-5487, is classified within Federal Supply Class 5990 (Synchros and Resolvers) of the Electrical and Electronic Equipment Components group. Government technical data includes 23 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 5990-00-646-5487 |
| Item Name | Synchro,control Transformer |
| FSC / FSG | 5990 / 59 — Synchros and Resolvers |
| Status | ACTIVE |
| Shaft Type | ROUND, SLOTTED SINGLE SHAFT |
| Flange Diameter | 0.7500 INCHES NOMINAL IN |
| Rotor DC Resistance in Ohms | 118.00 NOMINAL |
| Stator Input Current Rating | 145.0 AMPERES NOMINAL |
| Phase Shift Angle in Deg | 13.500 OUTPUT TO INPUT NOMINAL |
| Frequency in Hertz | 400.0 NOMINAL |
| Stator Input Electrical Power Rating | 0.3 WATTS NOMINAL |
| Terminal Location | REAR |
| Zso Impedance Angle in Deg | 73.00 NOMINAL |
| Zso Impedance Magnitude in Ohms | 79.00 NOMINAL |
| Maximum Fundamental Null Voltage in Millivolts Per Volt | 34.00 INPUT |
| Stator Input Voltage Rating in Volts | 11.8 NOMINAL |
| Maximum Total Null Voltage Output in Millivolts Per Volt | 53.00 |
| Shaft Slot Width | 0.0250 INCHES NOMINAL SINGLE SHAFT IN |
| Transformation Ratio | 2.203 STATOR TO ROTOR NOMINAL |
| Electrical Error Angular Range in Minutes | -5.0 TO 5.0 |
| Actuator Friction Torque at Plus 25 Deg Celsius | 3.00 CENTIMETER-GRAMS NOMINAL CM |
| Actuator Friction Torque at Minus 55 Deg Celsius | 12.00 CENTIMETER-GRAMS NOMINAL CM |
| Material | STEEL CORROSION RESISTING BODY |
| Terminal Type and Quantity | 5 WIRE LEAD |
| Maximum Temp Rise | 3.0 CELSIUS DEGC |
| Stator DC Resistance in Ohms | 24.50 NOMINAL |
| Shaft Slot Depth | 0.0300 INCHES NOMINAL SINGLE SHAFT IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Reference | Meaning |
|---|---|
| 123-23-1 | 5/2 Secondary reference U.S. Government activity |
| R1001-1A | 3/2 Design control — primary reference U.S. Government activity |
NSN 5990-00-646-5487 is a Synchro,control Transformer, classified under FSC 5990, Synchros and Resolvers. Status: active.
1 possible match (shared part number, not a government interchangeability claim): 5330-01-355-6731. Verify interchangeability with system specifications before substitution.
Key specifications for 5990-00-646-5487: Shaft Type: ROUND, SLOTTED SINGLE SHAFT; Flange Diameter: 0.7500 INCHES NOMINAL IN; Rotor DC Resistance in Ohms: 118.00 NOMINAL; Stator Input Current Rating: 145.0 AMPERES NOMINAL. 23 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.