The Switch,thermostatic, cataloged under National Stock Number 5930-00-815-2109, is classified within Federal Supply Class 5930 (Switches) of the Electrical and Electronic Equipment Components group. The manufacturer of record is Rheinmetall Air Defence Ag. Government technical data includes 23 specifications, cited from the U.S. Government catalog. The record lists 3 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 6 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 4 items share a part number with this NSN in the catalog (possible match — not a government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 | 5930-00-815-2109 |
| Primary Part Number | Q531487040 |
| Item Name | Switch,thermostatic |
| FSC / FSG | 5930 / 59 — Switches |
| Manufacturer | Rheinmetall Air Defence Ag |
| Status | ACTIVE |
| Contact Action Stimulus | INCREASE |
| Terminal Type | TAB, SOLDER LUG |
| Mounting Facility Pattern | TWO POSITION IN-LINE |
| Contact Load Current Rating | 2.0 AMPERES RESISTIVE LOAD SECOND VOLTAGE |
| Contact Load Current Rating | 2.5 AMPERES RESISTIVE LOAD FIRST VOLTAGE |
| Mounting Method | BRACKET(S) AND UNTHREADED HOLE(S) |
| Contact Adjustment Range | -20.00 TO 200.00 ACTUATION POINT DEGREES FAHRENHEIT AND -20.00 TO 200.00 DEACTUATION POINT DEGREES FAHRENHEIT |
| Body Width | 0.401 INCHES NOMINAL IN |
| Body Height | 0.251 INCHES NOMINAL IN |
| Unthreaded Mounting Hole Diameter | 0.156 INCHES NOMINAL IN |
| Style Designator | RECTANGULAR W/BRACKET |
| Temp Sensing Element Type | INTERNAL SENSOR |
| Contact Adjustment Type | EXTERNAL DEACTUATION POINT SCREW AND EXTERNAL ACTUATION POINT SCREW |
| Features Provided | HERMETICALLY SEALED CASE |
| Body Length | 0.776 INCHES NOMINAL IN |
| Operating Temp Rating | -65.0 FAHRENHEIT MINIMUM AND 220.0 FAHRENHEIT MAXIMUM DEGF |
| Nonpile-Up Contact Arrangement | 1 POLE, SINGLE THROW, NORMALLY CLOSED, MOMENTARY ACTION |
| Media for Which Designed | GAS OR LIQUID |
| Contact Stimulus Rating | 30.00 ACTUATION POINT NOMINAL DEGREES FAHRENHEIT AND 26.00 DEACTUATION POINT NOMINAL DEGREES FAHRENHEIT |
| Contact Adjustability | DEACTUATION POINT ADJUSTABLE, PRESET AND ACTUATION POINT ADJUSTABLE, PRESET |
| Contact Voltage Rating in Volts | 28.0 DC AT SEA LEVEL SECOND VOLTAGE |
| Contact Voltage Rating in Volts | 115.0 AC AT SEA LEVEL FIRST VOLTAGE |
| Longest Horizontal Distance Between Mounting Centers | 1.000 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 |
|---|---|
| Q531487040 | Rheinmetall Air Defence Ag (CHE) |
| 5011388-01 | Thales Uk Limited Dba Thales Uk Ltd Training and Simulation (GBR) |
| ARL3976-413 | Thales Uk Limited Dba Thales Uk Ltd Avionics (GBR) |
| Reference | Meaning |
|---|---|
| 66B42775 | 3/9 Design control — primary reference U.S. Government activity |
| 674987-1 | C/1 Advisory reference — outside the item-of-supply concept Viasys Respiratory Care Inc. Dba Biosys Healthcare |
| 32410-2 | 5/9 Secondary reference Kidde Technologies, Inc Dba Fenwal Safety Systems Div Fenwall Safety Systems |
| 32410-2-10F | C/1 Advisory reference — outside the item-of-supply concept Kidde Technologies, Inc Dba Fenwal Safety Systems Div Fenwall Safety Systems |
| 32410-2-30 | 5/9 Secondary reference Kidde Technologies, Inc Dba Fenwal Safety Systems Div Fenwall Safety Systems |
| 42211-106-00-2 | 5/9 Secondary reference British Aerospace Defence Systems Ltd T/a Bae Systems |
NSN 5930-00-815-2109 is a Switch,thermostatic, manufactured by Rheinmetall Air Defence Ag, classified under FSC 5930, Switches. Status: active.
NSN 5930-00-815-2109 has 3 manufacturer part numbers on file: Q531487040 (Rheinmetall Air Defence Ag), 5011388-01 (Thales Uk Limited Dba Thales Uk Ltd Training and Simulation), ARL3976-413 (Thales Uk Limited Dba Thales Uk Ltd Avionics).
4 possible matches (shared part number, not a government interchangeability claim): 5930-00-959-7843, 5930-00-959-7845, 5935-01-008-2401. Verify interchangeability with system specifications before substitution.
Key specifications for Q531487040: Overall Height: 0.440 INCHES NOMINAL IN; Contact Action Stimulus: INCREASE; Terminal Type: TAB, SOLDER LUG; Mounting Facility Pattern: TWO POSITION IN-LINE. 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.
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.