The Switch,radio Frequency Transmiss, cataloged under National Stock Number 5985-00-404-2286, 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 Spectrum Microwave, Inc.. Government technical data includes 26 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 4 items share a part number with this NSN in the catalog (possible match — not a government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 | 5985-00-404-2286 |
| Primary Part Number | SBC490 |
| Item Name | Switch,radio Frequency Transmiss |
| FSC / FSG | 5985 / 59 — Antennas, Waveguides, and Related Equipment |
| Manufacturer | Spectrum Microwave, Inc. |
| Status | ACTIVE |
| Mounting Facility Type and Quantity | 3 UNTHREADED HOLE(S) |
| Body Style | RECTANGULAR |
| Mounting Facility Pattern | SIX POSITION CIRCULAR SINGLE MOUNTING FACILITY PATTERN |
| Mounting Facility Circle Radius | 1.312 INCHES NOMINAL SINGLE MOUNTING FACILITY PATTERN IN |
| Precious Material | RHODIUM AND SILVER |
| Voltage Standing Wave Ratio | 1.10 SINGLE |
| Unthreaded Mounting Hole Diameter | 0.169 INCHES NOMINAL IN |
| Connector End Design | FEMALE |
| Coupling Position Quantity | 4 |
| Minimum Crosstalk Rating in Decibels | 50.0 SINGLE |
| Switch Type | TRANSFER |
| Insertion Loss in Decibels | 0.10 SINGLE |
| Actuator Operating Method | RELAY |
| Surface Treatment | ENAMEL BODY OUTSIDE SURFACES |
| Precious Material and Location | CONNECTOR SURFACES RHODIUM AND CONTACT SURFACES SILVER |
| Frequency Rating | 0.0 MEGAHERTZ MINIMUM AND 50.0 MEGAHERTZ MAXIMUM SINGLE FREQUENCY CROSSTALK REFERENCE |
| Frequency Rating | 0.0 MEGAHERTZ MINIMUM AND 50.0 MEGAHERTZ MAXIMUM SINGLE FREQUENCY INSERTION LOSS REFERENCE |
| Frequency Rating | 0.0 MEGAHERTZ MINIMUM AND 50.0 MEGAHERTZ MAXIMUM SINGLE FREQUENCY OPERATING |
| Frequency Rating | 0.0 MEGAHERTZ MINIMUM AND 50.0 MEGAHERTZ MAXIMUM SINGLE FREQUENCY RF POWER HANDLING |
| Frequency Rating | 0.0 MEGAHERTZ MINIMUM AND 50.0 MEGAHERTZ MAXIMUM SINGLE FREQUENCY VOLTAGE STANDING WAVE RATIO |
| Rf Power Handling Capability | 1.5 KILOWATTS PEAK SINGLE |
| Material | ALUMINUM BODY |
| Terminal Type and Quantity | 4 RECEPTACLE, COAXIAL |
| Switch Operation Sequence | MAKES BEFORE BREAKS |
| Coaxial Connector Series Designation | C |
| Rf Maximum Voltage Rating | 1.5 KILOVOLTS PEAK |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL Q — CCL Item — Commerce Control List |
| Hazard | Possible hazard — SDS may be required (DLA HMIC P) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| SBC490 PRIMARY | Spectrum Microwave, Inc. (USA) |
| Reference | Meaning |
|---|---|
| 1-6754 | 5/9 Secondary reference Spectrum Microwave, Inc. |
NSN 5985-00-404-2286 is a Switch,radio Frequency Transmiss, manufactured by Spectrum Microwave, Inc., classified under FSC 5985, Antennas, Waveguides, and Related Equipment. Status: active.
NSN 5985-00-404-2286 has 1 manufacturer part number on file: SBC490 (Spectrum Microwave, Inc.).
4 possible matches (shared part number, not a government interchangeability claim): 5330-00-448-0808, 6685-00-503-5088, 3020-01-205-7951. Verify interchangeability with system specifications before substitution.
Key specifications for SBC490: Mounting Facility Type and Quantity: 3 UNTHREADED HOLE(S); Overall Height: 3.000 INCHES NOMINAL IN; Body Style: RECTANGULAR; Mounting Facility Pattern: SIX POSITION CIRCULAR SINGLE MOUNTING FACILITY PATTERN. 26 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 5985-00-404-2286 has DEMIL Code Q. 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.