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C4391-8-1 — SWITCH,THERMOSTATIC

✓ Government record, cited
— · COMPONENT
PRODUCT OVERVIEW

C4391-8-1: SWITCH,THERMOSTATIC.

The SWITCH,THERMOSTATIC is a the manufacturer industrial component. Key specifications include body_height: 0.656 INCHES NOMINAL IN, body_diameter: 1.188 INCHES NOMINAL IN, terminal_type: TAB, SOLDER LUG, overall_height: 1.063 INCHES NOMINAL IN, overall_length: 2.188 INCHES NOMINAL IN, mounting_method: BRACKET(S) AND UNTHREADED HOLE(S). This part is cataloged in the U.S.

Government catalog under NSN 5930-00-259-7978, indicating validated use in U.S. government and defense logistics supply chains. Available through authorized enterprise resellers and TPM (Third Party Maintenance) channels.

Verify compatibility with your specific system configuration before ordering.

WHERE IT FITS
C4391-8-1
NSN: 5930-00-259-7978
FSC: 5930 — Switches
CAGE: 82647 — SENSATA TECHNOLOGIES, INC. DIV SENSATA ATTLEBORO (USA)
SPECIFICATIONS
body_height0.656 INCHES NOMINAL IN
body_diameter1.188 INCHES NOMINAL IN
terminal_typeTAB, SOLDER LUG
overall_height1.063 INCHES NOMINAL IN
overall_length2.188 INCHES NOMINAL IN
mounting_methodBRACKET(S) AND UNTHREADED HOLE(S)
style_designatorDISC W/FLANGE
features_providedHERMETICALLY SEALED CASE
contact_adjustabilityDEACTUATION POINT NOT ADJUSTABLE AND ACTUATION POINT NOT ADJUSTABLE
operating_temp_rating100.0 CELSIUS MAXIMUM AND -54.0 CELSIUS MINIMUM DEGC
contact_action_stimulusINCREASE
contact_stimulus_rating195.00 ACTUATION POINT NOMINAL DEGREES FAHRENHEIT AND 180.00 DEACTUATION POINT NOMINAL DEGREES FAHRENHEIT
NSN5930-00-259-7978
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available SWITCH,THERMOSTATIC TITLE COMPONENT PN C4391-8-1 MFR SWITCH,THERMOSTATIC
KEY FEATURES
•
BODY DIAMETER: 1.188 INCHES NOMINAL IN
•
CONTACT ACTION STIMULUS: INCREASE
•
TERMINAL TYPE: TAB, SOLDER LUG
•
MOUNTING FACILITY PATTERN: TWO POSITION IN-LINE
•
CONTACT LOAD CURRENT RATING: 2.9 AMPERES RESISTIVE LOAD FIRST VOLTAGE
•
MOUNTING METHOD: BRACKET(S) AND UNTHREADED HOLE(S)
TECHNICAL CHARACTERISTICS
BODY DIAMETER1.188 INCHES NOMINAL IN
OVERALL HEIGHT1.063 INCHES NOMINAL IN
CONTACT ACTION STIMULUSINCREASE
TERMINAL TYPETAB, SOLDER LUG
MOUNTING FACILITY PATTERNTWO POSITION IN-LINE
CONTACT LOAD CURRENT RATING2.9 AMPERES RESISTIVE LOAD FIRST VOLTAGE
CONTACT LOAD CURRENT RATING5.8 AMPERES RESISTIVE LOAD SECOND VOLTAGE
MOUNTING METHODBRACKET(S) AND UNTHREADED HOLE(S)
BODY HEIGHT0.656 INCHES NOMINAL IN
UNTHREADED MOUNTING HOLE DIAMETER0.157 INCHES NOMINAL IN
SUBSTITUTES & CROSS-REFERENCES 2
SW1253Reference document
Same NSN cross-reference
Reference document — Design control — primary reference
4391-8-1Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is C4391-8-1?
C4391-8-1 is a SWITCH,THERMOSTATIC.
What parts can replace C4391-8-1?
There are 2 known substitutes for C4391-8-1: SW1253, 4391-8-1. Substitute compatibility should be verified for your specific system.
What is the NSN for C4391-8-1?
C4391-8-1 is cataloged in the U.S. Government catalog under NSN 5930-00-259-7978. This indicates validated use in U.S. government and defense supply chains.
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✓ PartsTable — the parts reference. Every fact cited to its source.
PartsTable Design LLC · partstable.com
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
PartsTable commercial catalog: edition Unified commercial catalog snapshot through 2026-09-28, edition date not on file, retrieved 2026-09-28.