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Technical Data Sheet
PartsTable / MRO / 203974-1
203974-1 ✓ Verified by PartsTable
— · MRO · MRO_GENERAL
WHAT YOU NEED TO KNOW
Verify manufacturer and server generation compatibility Check if Option PN or Spare PN — same part, different channel
Confirm exact part number — similar PNs may be different parts
PRODUCT OVERVIEW

The SWITCH,THERMOSTATIC is a the manufacturer industrial component. Key specifications include terminal_type: CONNECTOR, RECEPTACLE, mounting_method: BRACKET(S), features_provided: HERMETICALLY SEALED CASE, capillary_tube_length: 2.000 INCHES MINIMUM AND 2.300 INCHES MAXIMUM IN, contact_adjustability: DEACTUATION POINT NOT ADJUSTABLE AND ACTUATION POINT NOT ADJUSTABLE, contact_action_stimulus: INCREASE. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5930-00-091-9254, 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
MRO→ MRO_GENERAL→ 203974-1
NSN: 5930-00-091-9254
FSC: 5930
CAGE: 70210 — HONEYWELL INTERNATIONAL INC. DIV AEROSPACE - TORRANCE (USA)
SPECIFICATIONS
terminal_typeCONNECTOR, RECEPTACLE
mounting_methodBRACKET(S)
features_providedHERMETICALLY SEALED CASE
capillary_tube_length2.000 INCHES MINIMUM AND 2.300 INCHES MAXIMUM IN
contact_adjustabilityDEACTUATION POINT NOT ADJUSTABLE AND ACTUATION POINT NOT ADJUSTABLE
contact_action_stimulusINCREASE
contact_stimulus_rating400.00 ACTUATION POINT NOMINAL DEGREES FAHRENHEIT
media_for_which_designedGAS OR LIQUID
temp_sensing_element_typeCAPILLARY TUBE
contact_voltage_rating_in_volts28.0 DC AT SEA LEVEL SINGLE VOLTAGE
longest_horizontal_distance_between_mounting_centers0.990 INCHES MINIMUM AND 1.010 INCHES MAXIMUM IN
NSN5930-00-091-9254
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available SWITCH,THERMOSTATIC TITLE COMPONENT PN 203974-1 MFR SWITCH,THERMOSTATIC
KEY FEATURES
•
MOUNTING METHOD: BRACKET(S)
•
CONTACT STIMULUS RATING: 400.00 ACTUATION POINT NOMINAL DEGREES FAHRENHEIT
•
CONTACT ACTION STIMULUS: INCREASE
•
TEMP SENSING ELEMENT TYPE: CAPILLARY TUBE
•
CONTACT ADJUSTABILITY: DEACTUATION POINT NOT ADJUSTABLE AND ACTUATION POINT NOT ADJUSTABLE
•
LONGEST HORIZONTAL DISTANCE BETWEEN MOUNTING CENTERS: 0.990 INCHES MINIMUM AND 1.010 INCHES MAXIMUM IN
•
CONTACT VOLTAGE RATING IN VOLTS: 28.0 DC AT SEA LEVEL SINGLE VOLTAGE
•
MEDIA FOR WHICH DESIGNED: GAS OR LIQUID
TECHNICAL CHARACTERISTICS (FLIS)
MOUNTING METHODBRACKET(S)
CONTACT STIMULUS RATING400.00 ACTUATION POINT NOMINAL DEGREES FAHRENHEIT
CONTACT ACTION STIMULUSINCREASE
TEMP SENSING ELEMENT TYPECAPILLARY TUBE
CONTACT ADJUSTABILITYDEACTUATION POINT NOT ADJUSTABLE AND ACTUATION POINT NOT ADJUSTABLE
LONGEST HORIZONTAL DISTANCE BETWEEN MOUNTING CENTERS0.990 INCHES MINIMUM AND 1.010 INCHES MAXIMUM IN
CONTACT VOLTAGE RATING IN VOLTS28.0 DC AT SEA LEVEL SINGLE VOLTAGE
MEDIA FOR WHICH DESIGNEDGAS OR LIQUID
TERMINAL TYPECONNECTOR, RECEPTACLE
CAPILLARY TUBE LENGTH2.000 INCHES MINIMUM AND 2.300 INCHES MAXIMUM IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 12
21738REVLInterchangeable
interchangeable cross-reference
interchangeable
21738Interchangeable
interchangeable cross-reference
interchangeable
8444L3NInterchangeable
interchangeable cross-reference
interchangeable
15494N REVBInterchangeable
interchangeable cross-reference
interchangeable
15494REVBInterchangeable
interchangeable cross-reference
interchangeable
CTHVNS1Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 203974-1?
203974-1 is a SWITCH,THERMOSTATIC. It is classified as a MRO (MRO_GENERAL).
What parts can replace 203974-1?
There are 12 known substitutes for 203974-1: 21738REVL, 21738, 8444L3N and 9 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 203974-1?
203974-1 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5930-00-091-9254. This indicates validated use in U.S. government and defense supply chains.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026