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Technical Data Sheet
PartsTable / COMPONENT / KR-3657-1
KR-3657-1 ✓ Verified by PartsTable
— · COMPONENT
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 RELAY,ELECTROMAGNETIC is a the manufacturer industrial component. Key specifications include duty_type: INTERMITTENT, thread_class: 2A SINGLE MOUNTING FACILITY A, overall_width: 1.250 INCHES NOMINAL IN, overall_height: 1.620 INCHES NOMINAL IN, overall_length: 1.810 INCHES NOMINAL IN, nominal_thread_size: 0.138 INCHES SINGLE MOUNTING FACILITY IN. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5945-00-201-7195, 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
KR-3657-1
NSN: 5945-00-201-7195
FSC: 5945
CAGE: 77342 — TE CONNECTIVITY CORPORATION (USA)
SPECIFICATIONS
duty_typeINTERMITTENT
thread_class2A SINGLE MOUNTING FACILITY A
coil_quantity1
overall_width1.250 INCHES NOMINAL IN
overall_height1.620 INCHES NOMINAL IN
overall_length1.810 INCHES NOMINAL IN
winding_quantity1
nominal_thread_size0.138 INCHES SINGLE MOUNTING FACILITY IN
end_item_identificationTYPE AN/CRT-3
thread_quantity_per_inch32 SINGLE MOUNTING FACILITY
thread_series_designatorUNIFIED NATIONAL COARSE (UNC) SINGLE MOUNTING FACILITY
terminal_type_and_quantity6 PIN ALL FUNCTIONS
NSN5945-00-201-7195
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available RELAY,ELECTROMAGNETIC TITLE COMPONENT PN KR-3657-1 MFR RELAY,ELECTROMAGNETIC
KEY FEATURES
•
DUTY TYPE: INTERMITTENT
•
OPERATING VOLTAGE RATING AND TYPE AT SPECIFIED TEMP: 9.0 VOLTS DC 25 DEG CELSIUS SINGLE WINDING
•
THREAD QUANTITY PER INCH: 32 SINGLE MOUNTING FACILITY
•
WINDING DC RESISTANCE RATING: 250.0 OHMS NOMINAL SINGLE WINDING
•
NOMINAL THREAD SIZE: 0.138 INCHES SINGLE MOUNTING FACILITY IN
•
THREAD SERIES DESIGNATOR: UNIFIED NATIONAL COARSE (UNC) SINGLE MOUNTING FACILITY
•
NOMINAL OPERATING CURRENT RATING AND TYPE: 56.0 MILLIAMPERES DC SINGLE WINDING
•
MAIN CONTACT MAXIMUM VOLTAGE RATING IN VOLTS: 300.0 DC
TECHNICAL CHARACTERISTICS (FLIS)
DUTY TYPEINTERMITTENT
OPERATING VOLTAGE RATING AND TYPE AT SPECIFIED TEMP9.0 VOLTS DC 25 DEG CELSIUS SINGLE WINDING
THREAD QUANTITY PER INCH32 SINGLE MOUNTING FACILITY
WINDING DC RESISTANCE RATING250.0 OHMS NOMINAL SINGLE WINDING
NOMINAL THREAD SIZE0.138 INCHES SINGLE MOUNTING FACILITY IN
THREAD SERIES DESIGNATORUNIFIED NATIONAL COARSE (UNC) SINGLE MOUNTING FACILITY
NOMINAL OPERATING CURRENT RATING AND TYPE56.0 MILLIAMPERES DC SINGLE WINDING
MAIN CONTACT MAXIMUM VOLTAGE RATING IN VOLTS300.0 DC
MAIN CONTACT LOAD CURRENT RATING AT MAXIMUM RATED VOLTAGE4.0 MILLIAMPERES DC RESISTIVE LOAD
THREAD CLASS2A SINGLE MOUNTING FACILITY A
VERIFIED SUBSTITUTES & CROSS-REFERENCES 10
43-1185Interchangeable
interchangeable cross-reference
interchangeable
48688Interchangeable
interchangeable cross-reference
interchangeable
2036108Interchangeable
interchangeable cross-reference
interchangeable
971814Interchangeable
interchangeable cross-reference
interchangeable
MOBILGARD ADL 30Interchangeable
interchangeable cross-reference
interchangeable
456672Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is KR-3657-1?
KR-3657-1 is a RELAY,ELECTROMAGNETIC.
What parts can replace KR-3657-1?
There are 10 known substitutes for KR-3657-1: 43-1185, 48688, 2036108 and 7 more. Substitute compatibility should be verified for your specific system.
What is the NSN for KR-3657-1?
KR-3657-1 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5945-00-201-7195. This indicates validated use in U.S. government and defense supply chains.
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Last verified: July 2026