The Switch,radio Frequency Transmiss, cataloged under National Stock Number 5985-01-156-9087, 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 Dbp Microwave Inc. Dba Dbp Microwave Inc.. Government technical data includes 27 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5985-01-156-9087 |
| Primary Part Number | 2SF4E12 |
| Item Name | Switch,radio Frequency Transmiss |
| FSC / FSG | 5985 / 59 — Antennas, Waveguides, and Related Equipment |
| Manufacturer | Dbp Microwave Inc. Dba Dbp Microwave Inc. |
| Status | ACTIVE |
| Switching Time | 20.0 SECONDS |
| 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 | 115.0 NOMINAL |
| Precious Material | GOLD |
| Voltage Standing Wave Ratio | 1.40 THIRD |
| Voltage Standing Wave Ratio | 1.30 SECOND |
| Voltage Standing Wave Ratio | 1.20 FIRST |
| Unthreaded Mounting Hole Diameter | 0.116 INCHES NOMINAL IN |
| Pole Quantity | 1 |
| Switch Return Mechanism Type | FAIL-SAFE |
| Connector End Design | FEMALE |
| Coupling Position Quantity | 6 |
| Minimum Crosstalk Rating in Decibels | 60.0 SINGLE |
| Switch Type | NONTRANSFER |
| Insertion Loss in Decibels | 0.20 FIRST |
| Insertion Loss in Decibels | 0.40 THIRD |
| Insertion Loss in Decibels | 0.30 SECOND |
| Actuator Operating Method | SOLID STATE |
| Surface Treatment | NICKEL BODY OUTSIDE SURFACES |
| Surface Treatment | GOLD CONTACT(S) OUTSIDE SURFACES |
| Precious Material and Location | REEDS AND CENTER CONDUCTORS SURFACES GOLD |
| Operating Temp Range | -0.0 TO 50.0 CELSIUS DEGC |
| Frequency Rating | 8.0 GIGAHERTZ MINIMUM AND 12.4 GIGAHERTZ MAXIMUM THIRD FREQUENCY INSERTION LOSS REFERENCE |
| Frequency Rating | 8.0 GIGAHERTZ MINIMUM AND 12.4 GIGAHERTZ MAXIMUM THIRD FREQUENCY VOLTAGE STANDING WAVE RATIO |
| Frequency Rating | 3.0 GIGAHERTZ MINIMUM AND 8.0 GIGAHERTZ MAXIMUM SECOND FREQUENCY VOLTAGE STANDING WAVE RATIO |
| 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 |
|---|---|
| 2SF4E12 | Dbp Microwave Inc. Dba Dbp Microwave Inc. (USA) |
| Reference | Meaning |
|---|---|
| 926243-1C | 3/2 Design control — primary reference U.S. Government activity |
| D3-435B2-LL | 5/9 Secondary reference Ducommun Labarge Technologies, Inc Dba Ducommun Labarge Technologies, Inc |
| 2SF4E12-HAC | 5/9 Secondary reference Dbp Microwave Inc. Dba Dbp Microwave Inc. |
NSN 5985-01-156-9087 is a Switch,radio Frequency Transmiss, manufactured by Dbp Microwave Inc. Dba Dbp Microwave Inc., classified under FSC 5985, Antennas, Waveguides, and Related Equipment. Status: active.
NSN 5985-01-156-9087 has 1 manufacturer part number on file: 2SF4E12 (Dbp Microwave Inc. Dba Dbp Microwave Inc.).
Key specifications for 2SF4E12: Switching Time: 20.0 SECONDS; Mounting Facility Type and Quantity: 2 UNTHREADED HOLE(S); Overall Height: 2.150 INCHES MAXIMUM IN; Body Style: RECTANGULAR. 27 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.