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Technical Data Sheet
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FRN-R40 — Technical Data Sheet

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— · MRO · MRO_GENERAL
WHAT YOU NEED TO KNOW
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Confirm exact part number — similar PNs may be different parts
PRODUCT OVERVIEW

The FUSE,CARTRIDGE is a the manufacturer industrial component. Key specifications include material: CERAMIC OR FIBER OR GLASS OR PLASTIC MELAMINE CASE, body_style: REJECTION GROOVE TYPE, overall_length: 3.000 INCHES NOMINAL IN, overall_diameter: 0.812 INCHES NOMINAL IN, features_provided: NONRENEWABLE FUSIBLE ELEMENT, specification/standard_data: 81348-W-F-1814/57 GOVERNMENT SPECIFICATION. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System under NSN 5920-01-272-6234, 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→ FRN-R40
NSN: 5920-01-272-6234
FSC: 5920
CAGE: 71400 — COOPER BUSSMANN, LLC DBA COOPER INDUSTRIES (USA)
SPECIFICATIONS
materialCERAMIC OR FIBER OR GLASS OR PLASTIC MELAMINE CASE
body_styleREJECTION GROOVE TYPE
overall_length3.000 INCHES NOMINAL IN
overall_diameter0.812 INCHES NOMINAL IN
features_providedNONRENEWABLE FUSIBLE ELEMENT
specification/standard_data81348-W-F-1814/57 GOVERNMENT SPECIFICATION
interruption_indicator_methodOPAQUE BODY
maximum_voltage_rating_in_volts250.0 AC
continuous_current_rating_in_amps40.000
circuit_over-current_interruption_typeTIME DELAY
circuit_over-current_interruption_delay_time_in_seconds10.0 500 PCT OF CURRENT RATING
NSN5920-01-272-6234
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available FUSE,CARTRIDGE TITLE COMPONENT PN FRN-R40 MFR FUSE,CARTRIDGE
KEY FEATURES
•
FEATURES PROVIDED: NONRENEWABLE FUSIBLE ELEMENT
•
CONTINUOUS CURRENT RATING IN AMPS: 40.000
•
MAXIMUM VOLTAGE RATING IN VOLTS: 250.0 AC
•
CIRCUIT OVER-CURRENT INTERRUPTION DELAY TIME IN SECONDS: 10.0 500 PCT OF CURRENT RATING
•
TEST DATA DOCUMENT: 81348-W-F-1814 SPECIFICATION (INCLUDES ENGINEERING TYPE BULLETINS, BROCHURES,ETC., THAT REFLECT SPECIFICATION TYPE DATA IN SPECIFICATION FORMAT; EXCLUDES COMMERCIAL CATALOGS, INDUSTRY DIRECTORIES, AND SIMILAR TRADE PUBLICATIONS, REFLECTING GENERAL TYPE DATA ON CERTAIN ENVIRONMENTAL AND PERFORMANCE REQUIREMENTS AND TEST CONDITIONS THAT ARE SHOWN AS "TYPICAL", "AVERAGE", "NOMINAL", ETC.).
•
OVERALL DIAMETER: 0.812 INCHES NOMINAL IN
•
SPECIFICATION/STANDARD DATA: 81348-W-F-1814/57 GOVERNMENT SPECIFICATION
TECHNICAL CHARACTERISTICS
FEATURES PROVIDEDNONRENEWABLE FUSIBLE ELEMENT
CONTINUOUS CURRENT RATING IN AMPS40.000
MAXIMUM VOLTAGE RATING IN VOLTS250.0 AC
OVERALL LENGTH3.000 INCHES NOMINAL IN
CIRCUIT OVER-CURRENT INTERRUPTION DELAY TIME IN SECONDS10.0 500 PCT OF CURRENT RATING
TEST DATA DOCUMENT81348-W-F-1814 SPECIFICATION (INCLUDES ENGINEERING TYPE BULLETINS, BROCHURES,ETC., THAT REFLECT SPECIFICATION TYPE DATA IN SPECIFICATION FORMAT; EXCLUDES COMMERCIAL CATALOGS, INDUSTRY DIRECTORIES, AND SIMILAR TRADE PUBLICATIONS, REFLECTING GENERAL TYPE DATA ON CERTAIN ENVIRONMENTAL AND PERFORMANCE REQUIREMENTS AND TEST CONDITIONS THAT ARE SHOWN AS "TYPICAL", "AVERAGE", "NOMINAL", ETC.).
OVERALL DIAMETER0.812 INCHES NOMINAL IN
SPECIFICATION/STANDARD DATA81348-W-F-1814/57 GOVERNMENT SPECIFICATION
INTERRUPTION INDICATOR METHODOPAQUE BODY
CIRCUIT OVER-CURRENT INTERRUPTION TYPETIME DELAY
VERIFIED SUBSTITUTES & CROSS-REFERENCES 14
WF1814/57-D160InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
W-F-1814/57InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
WF1814/57-F140InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
WF1814/57-D560InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
W-F-1726/2-010InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
WF791AInterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVEGOVERNMENT REGISTRY
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is FRN-R40?
FRN-R40 is a FUSE,CARTRIDGE. It is classified as a MRO (MRO_GENERAL).
What parts can replace FRN-R40?
There are 14 known substitutes for FRN-R40: WF1814/57-D160, W-F-1814/57, WF1814/57-F140 and 11 more. Substitute compatibility should be verified for your specific system.
What is the NSN for FRN-R40?
FRN-R40 is cataloged in the Federal Logistics Information System under NSN 5920-01-272-6234. This indicates validated use in U.S. government and defense supply chains.
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Last verified: October 2026