The Switch,thermostatic, cataloged under National Stock Number 5930-01-107-8879, is classified within Federal Supply Class 5930 (Switches) of the Electrical and Electronic Equipment Components group. The manufacturer of record is Transistor Devices Inc Div Astrodyne Tdi High Power Business Unit. Government technical data includes 18 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government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 | 5930-01-107-8879 |
| Primary Part Number | 27503 |
| Item Name | Switch,thermostatic |
| FSC / FSG | 5930 / 59 — Switches |
| Manufacturer | Transistor Devices Inc Div Astrodyne Tdi High Power Business Unit |
| Status | ACTIVE |
| Body Diameter | 0.920 INCHES NOMINAL IN |
| Contact Action Stimulus | INCREASE |
| Terminal Type | SCREW |
| Mounting Facility Pattern | TWO POSITION IN-LINE |
| Contact Load Current Rating | 25.0 AMPERES RESISTIVE LOAD SECOND VOLTAGE |
| Contact Load Current Rating | 25.0 AMPERES RESISTIVE LOAD FIRST VOLTAGE |
| Mounting Method | BRACKET(S) AND SLOT |
| Temp Sensing Element Type | INTERNAL SENSOR |
| Distance Between Mounting Facility Centers | 1.380 INCHES NOMINAL IN |
| Operating Temp Rating | 31.0 CELSIUS MAXIMUM AND 18.0 CELSIUS MINIMUM DEGC |
| Nonpile-Up Contact Arrangement | 1 POLE, SINGLE THROW, NORMALLY CLOSED, MOMENTARY ACTION |
| Media for Which Designed | GAS |
| Contact Stimulus Rating | 185.00 ACTUATION POINT NOMINAL DEGREES FAHRENHEIT AND 180.00 DEACTUATION POINT NOMINAL DEGREES FAHRENHEIT |
| Contact Adjustability | DEACTUATION POINT NOT ADJUSTABLE AND ACTUATION POINT NOT ADJUSTABLE |
| Contact Voltage Rating in Volts | 240.0 AC AT SEA LEVEL FIRST VOLTAGE |
| Contact Voltage Rating in Volts | 120.0 AC AT SEA LEVEL SECOND VOLTAGE |
| Hazardous Locations/environmental Protection | WEATHERPROOF |
| Mounting Slot Width | 0.170 INCHES NOMINAL IN |
| 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 |
|---|---|
| 27503 PRIMARY | Transistor Devices Inc Div Astrodyne Tdi High Power Business Unit (USA) |
| Reference | Meaning |
|---|---|
| 20615L16-A29(L185MR) | 5/9 Secondary reference U.S. Government activity |
| 20615L/L185MR | 5/9 Secondary reference U.S. Government activity |
| 20615L16-A29(L185MR) | 5/9 Secondary reference Texas Instruments Inc Control Products Div |
NSN 5930-01-107-8879 is a Switch,thermostatic, manufactured by Transistor Devices Inc Div Astrodyne Tdi High Power Business Unit, classified under FSC 5930, Switches. Status: active.
NSN 5930-01-107-8879 has 1 manufacturer part number on file: 27503 (Transistor Devices Inc Div Astrodyne Tdi High Power Business Unit).
2 possible matches (shared part number, not a government interchangeability claim): 4130-01-274-5879, 4820-01-447-2999. Verify interchangeability with system specifications before substitution.
Key specifications for 27503: Body Diameter: 0.920 INCHES NOMINAL IN; Contact Action Stimulus: INCREASE; Terminal Type: SCREW; Mounting Facility Pattern: TWO POSITION IN-LINE. 18 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.