The Switch,proximity, cataloged under National Stock Number 5930-01-463-8500, is classified within Federal Supply Class 5930 (Switches) of the Electrical and Electronic Equipment Components group. The manufacturer of record is Topworx Inc. Government technical data includes 25 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5930-01-463-8500 |
| Primary Part Number | 81-20126-A2 |
| Item Name | Switch,proximity |
| FSC / FSG | 5930 / 59 — Switches |
| Manufacturer | Topworx Inc |
| Status | ACTIVE |
| Frequency in Hertz | 60.0 EIGHTH VOLTAGEUNABLE TO DECODE |
| Frequency in Hertz | 60.0 FIFTH VOLTAGEUNABLE TO DECODE |
| Frequency in Hertz | 60.0 FIRST VOLTAGEUNABLE TO DECODE |
| Frequency in Hertz | 60.0 FOURTH VOLTAGEUNABLE TO DECODE |
| Frequency in Hertz | 60.0 SECOND VOLTAGEUNABLE TO DECODE |
| Frequency in Hertz | 60.0 SEVENTH VOLTAGEUNABLE TO DECODE |
| Frequency in Hertz | 60.0 SIXTH VOLTAGEUNABLE TO DECODE |
| Frequency in Hertz | 60.0 THIRD VOLTAGEUNABLE TO DECODE |
| Contact Action Stimulus | INCREASE |
| Terminal Type | WIRE LEAD |
| Contact Load Current Rating | 10.0 AMPERES RESISTIVE LOAD FIRST VOLTAGE |
| Contact Load Current Rating | 2.0 AMPERES RESISTIVE LOAD FOURTH VOLTAGE |
| Contact Load Current Rating | 5.0 AMPERES RESISTIVE LOAD SECOND VOLTAGE |
| Contact Load Current Rating | 0.5 AMPERES RESISTIVE LOAD EIGHTH VOLTAGE |
| Contact Load Current Rating | 0.5 AMPERES RESISTIVE LOAD SEVENTH VOLTAGE |
| Contact Load Current Rating | 1.0 AMPERES RESISTIVE LOAD SIXTH VOLTAGE |
| Contact Load Current Rating | 2.5 AMPERES RESISTIVE LOAD THIRD VOLTAGE |
| Contact Load Current Rating | 3.0 AMPERES RESISTIVE LOAD FIFTH VOLTAGE |
| Nominal Thread Size | 0.500 INCHES SINGLE THREADED HOLE IN |
| Body Length | 3.120 INCHES NOMINAL IN |
| Operating Temp Rating | -40.0 FAHRENHEIT MINIMUM AND 221.0 FAHRENHEIT MAXIMUM DEGF |
| Nonpile-Up Contact Arrangement | 2 TWO CIRCUIT, DOUBLE BREAK/DOUBLE MAKE, BOTH POSITIONS MAINTAINED |
| Thread Quantity Per Inch | 14 SINGLE THREADED HOLE |
| Thread Series Designator | NPT SINGLE THREADED HOLE |
| Contact Voltage Rating in Volts | 480.0 AC AT SEA LEVEL THIRD VOLTAGE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | Possible hazard — SDS may be required (DLA HMIC P) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 81-20126-A2 PRIMARY | Topworx Inc (USA) |
| Reference | Meaning |
|---|---|
| 81-20126-A1 | 5/9 Secondary reference Topworx Inc |
NSN 5930-01-463-8500 is a Switch,proximity, manufactured by Topworx Inc, classified under FSC 5930, Switches. Status: active.
NSN 5930-01-463-8500 has 1 manufacturer part number on file: 81-20126-A2 (Topworx Inc).
Key specifications for 81-20126-A2: Overall Height: 1.500 INCHES NOMINAL IN; Frequency in Hertz: 60.0 EIGHTH VOLTAGEUNABLE TO DECODE; Frequency in Hertz: 60.0 FIFTH VOLTAGEUNABLE TO DECODE; Frequency in Hertz: 60.0 FIRST VOLTAGEUNABLE TO DECODE. 25 specifications are documented in the U.S. Government catalog.
Possible hazard — SDS may be required (DLA HMIC P). 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.