The Switch,radio Frequency Transmiss, cataloged under National Stock Number 5985-00-539-3071, is classified within Federal Supply Class 5985 (Antennas, Waveguides, and Related Equipment) of the Electrical and Electronic Equipment Components group. The manufacturer of record is Instrument Systems Corp. 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5985-00-539-3071 |
| Primary Part Number | R235A049-1 |
| Item Name | Switch,radio Frequency Transmiss |
| FSC / FSG | 5985 / 59 — Antennas, Waveguides, and Related Equipment |
| Manufacturer | Instrument Systems Corp |
| Status | ACTIVE |
| Mounting Facility Type and Quantity | 2 UNTHREADED HOLE(S) |
| Body Style | RECTANGULAR |
| Mounting Facility Pattern | TWO POSITION IN-LINE SINGLE MOUNTING FACILITY PATTERN |
| Actuator Voltage in Volts | 28.0 NOMINAL |
| Voltage Standing Wave Ratio | 1.20 SINGLE |
| Unthreaded Mounting Hole Diameter | 0.115 INCHES MINIMUM AND 0.125 INCHES MAXIMUM IN |
| Pole Quantity | 2 |
| Switch Return Mechanism Type | FAIL-SAFE |
| Actuator Current Type and Rating in Amps | 2.0 DC NOMINAL |
| Distance Between Mounting Facility Centers | 1.068 INCHES MINIMUM AND 1.088 INCHES MAXIMUM SINGLE MOUNTING FACILITY PATTERN IN |
| Coupling Position Quantity | 4 |
| Minimum Crosstalk Rating in Decibels | 50.0 SINGLE |
| Switch Type | NONTRANSFER |
| Insertion Loss in Decibels | 0.40 SINGLE |
| Actuator Operating Method | RELAY |
| Operating Temp Range | -65.0 TO 125.0 CELSIUS DEGC |
| Frequency Rating | 0.0 MEGAHERTZ MINIMUM AND 500.0 MEGAHERTZ MAXIMUM SINGLE FREQUENCY INSERTION LOSS REFERENCE |
| Frequency Rating | 0.0 MEGAHERTZ MINIMUM AND 500.0 MEGAHERTZ MAXIMUM SINGLE FREQUENCY CROSSTALK REFERENCE |
| Frequency Rating | 0.0 MEGAHERTZ MINIMUM AND 500.0 MEGAHERTZ MAXIMUM SINGLE FREQUENCY VOLTAGE STANDING WAVE RATIO |
| Frequency Rating | 0.0 MEGAHERTZ MINIMUM AND 500.0 MEGAHERTZ MAXIMUM SINGLE FREQUENCY OPERATING |
| Frequency Rating | 0.0 MEGAHERTZ MINIMUM AND 500.0 MEGAHERTZ MAXIMUM SINGLE FREQUENCY RF POWER HANDLING |
| Rf Power Handling Capability | 200.0 WATTS PEAK SINGLE |
| Terminal Type and Quantity | 8 TAB, SOLDER LUG |
| Switch Operation Sequence | MAKES BEFORE BREAKS |
| Throw Quantity | 2 |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL B — Remove Demilitarization Key Points |
| Hazard | Possible hazard — SDS may be required (DLA HMIC P) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| R235A049-1 PRIMARY | Instrument Systems Corp (USA) |
| Reference | Meaning |
|---|---|
| RFK4258 | 5/9 Secondary reference Hi-G Co Inc Sub of Nytronics Inc |
NSN 5985-00-539-3071 is a Switch,radio Frequency Transmiss, manufactured by Instrument Systems Corp, classified under FSC 5985, Antennas, Waveguides, and Related Equipment. Status: active.
NSN 5985-00-539-3071 has 1 manufacturer part number on file: R235A049-1 (Instrument Systems Corp).
Key specifications for R235A049-1: Mounting Facility Type and Quantity: 2 UNTHREADED HOLE(S); Overall Height: 0.410 INCHES MAXIMUM IN; Body Style: RECTANGULAR; Mounting Facility Pattern: TWO POSITION IN-LINE SINGLE MOUNTING FACILITY PATTERN. 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.
NSN 5985-00-539-3071 has DEMIL Code B. Demilitarization may be required before disposal or transfer to non-military entities.
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.