The Switch,radio Frequency Transmiss, cataloged under National Stock Number 5985-01-423-1054, 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 Dow-Key Microwave Llc. Government technical data includes 23 specifications, cited from the U.S. Government catalog. The record lists 4 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 8 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5985-01-423-1054 |
| Primary Part Number | 4MPT-28-L-0005 |
| Item Name | Switch,radio Frequency Transmiss |
| FSC / FSG | 5985 / 59 — Antennas, Waveguides, and Related Equipment |
| Manufacturer | Dow-Key Microwave Llc |
| Status | ACTIVE |
| Switching Time | 50.0 MILLISECONDS MS |
| Mounting Facility Type and Quantity | 4 UNTHREADED HOLE(S) |
| Body Style | IRREGULAR |
| Actuator Voltage in Volts | 20.0 MINIMUM AND 30.0 MAXIMUM |
| Voltage Standing Wave Ratio | 1.30 SINGLE |
| Unthreaded Mounting Hole Diameter | 0.141 INCHES NOMINAL IN |
| Pole Quantity | 1 |
| Switch Return Mechanism Type | LATCHING |
| Connector End Design | FEMALE |
| Actuator Current Type and Rating in Amps | 0.3 DC NOMINAL |
| Coupling Position Quantity | 7 |
| Minimum Crosstalk Rating in Decibels | 70.0 SINGLE |
| Switch Type | NONTRANSFER |
| Insertion Loss in Decibels | 0.30 SINGLE |
| Actuator Operating Method | RELAY |
| Frequency Rating | 0.05 GIGAHERTZ MINIMUM AND 8.4 GIGAHERTZ MAXIMUM SINGLE FREQUENCY OPERATING |
| Rf Power Handling Capability | 50.0 WATTS PEAK SINGLE |
| Material | ALUMINUM COVER |
| Material | ALUMINUM BODY |
| Terminal Type and Quantity | 1 CONNECTOR, RECEPTACLE AND 6 RECEPTACLE, COAXIAL |
| Switch Operation Sequence | BREAKS BEFORE MAKES |
| Coaxial Connector Series Designation | SMA |
| Throw Quantity | 5 |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL D — Destroy Item |
| Hazard | Possible hazard — SDS may be required (DLA HMIC P) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 4MPT-28-L-0005 | Dow-Key Microwave Llc (USA) |
| TWC14KMLXX11 | Logus Manufacturing Corp. (USA) |
| M4-429E905 | Ducommun Labarge Technologies, Inc Dba Ducommun Labarge Technologies, Inc (USA) |
| A3188115-002 | Dow-Key Microwave Llc (USA) |
| Reference | Meaning |
|---|---|
| A3188115-002 | 5/9 Secondary reference U.S. Government activity |
| A3188115-002 | 7/2 Vendor item drawing reference U.S. Government activity |
| A3188115-002 | 5/9 Secondary reference U.S. Government activity |
| A3188115-002 | 5/9 Secondary reference Spectrum Microwave, Inc. |
| A3188115-002 | 5/9 Secondary reference Ducommun Labarge Technologies, Inc Dba Ducommun Labarge Technologies, Inc |
| 4MPT-43389 | 5/9 Secondary reference Dow-Key Microwave Llc |
| 4MPT-43389 | 5/9 Secondary reference K&l Microwave Llc |
| 042-B1237-A2C-7B1 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5985-01-423-1054 is a Switch,radio Frequency Transmiss, manufactured by Dow-Key Microwave Llc, classified under FSC 5985, Antennas, Waveguides, and Related Equipment. Status: active.
NSN 5985-01-423-1054 has 4 manufacturer part numbers on file: 4MPT-28-L-0005 (Dow-Key Microwave Llc), TWC14KMLXX11 (Logus Manufacturing Corp.), M4-429E905 (Ducommun Labarge Technologies, Inc Dba Ducommun Labarge Technologies, Inc), A3188115-002 (Dow-Key Microwave Llc).
Key specifications for 4MPT-28-L-0005: Switching Time: 50.0 MILLISECONDS MS; Mounting Facility Type and Quantity: 4 UNTHREADED HOLE(S); Overall Height: 2.500 INCHES NOMINAL IN; Body Style: IRREGULAR. 23 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 5985-01-423-1054 has DEMIL Code D. 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.