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Technical Data Sheet
PartsTable / COMPONENT / 9-S-4778L
9-S-4778L ✓ 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 SWITCH ASSEMBLY-DIODE is a the manufacturer industrial component. Key specifications include material: COPPER ALLOY BODY, terminal_type: WIRE LEAD, overall_height: 2.125 INCHES NOMINAL IN, mounting_method: TERMINAL LOCATION NOT OTHERWISE SPECIFIED, outside_diameter: 1.625 INCHES NOMINAL IN, style_designator: WIRE LEADS. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 6250-00-255-4215, 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
9-S-4778L
NSN: 6250-00-255-4215
FSC: 6250
CAGE: 81348 — FEDERAL SPECIFICATIONS PROMULGATED BY GENERAL SERVICES ADMINISTRATION WASHINGTON DC (USA)
SPECIFICATIONS
materialCOPPER ALLOY BODY
terminal_typeWIRE LEAD
overall_height2.125 INCHES NOMINAL IN
mounting_methodTERMINAL LOCATION NOT OTHERWISE SPECIFIED
outside_diameter1.625 INCHES NOMINAL IN
style_designatorWIRE LEADS
voltage_in_volts250.0
terminal_quantity2
mounting_feature_typeANY ACCEPTABLE
wattage_rating_in_watts660.0
wiring_provision_length12.500 INCHES NOMINAL IN
mounting_device_quantity2
NSN6250-00-255-4215
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available SWITCH ASSEMBLY-DIODE TITLE COMPONENT PN 9-S-4778L MFR SWITCH ASSEMBLY-DIODE
KEY FEATURES
•
TERMINAL QUANTITY: 2
•
MATERIAL: COPPER ALLOY BODY
•
MOUNTING METHOD: TERMINAL LOCATION NOT OTHERWISE SPECIFIED
•
HAZARDOUS LOCATIONS/ENVIRONMENTAL PROTECTION: WEATHERPROOF-NEMA TYPE 3
•
ACCESSORY MOUNTING PROVISION: GROOVE
•
WATTAGE RATING IN WATTS: 660.0
•
LAMP BASE TYPE ACCOMMODATED: MEDIUM SCREW
TECHNICAL CHARACTERISTICS (FLIS)
TERMINAL QUANTITY2
MATERIALCOPPER ALLOY BODY
MOUNTING METHODTERMINAL LOCATION NOT OTHERWISE SPECIFIED
OVERALL HEIGHT2.125 INCHES NOMINAL IN
HAZARDOUS LOCATIONS/ENVIRONMENTAL PROTECTIONWEATHERPROOF-NEMA TYPE 3
ACCESSORY MOUNTING PROVISIONGROOVE
WATTAGE RATING IN WATTS660.0
LAMP BASE TYPE ACCOMMODATEDMEDIUM SCREW
TERMINAL TYPEWIRE LEAD
MOUNTING DEVICE QUANTITY2
VERIFIED SUBSTITUTES & CROSS-REFERENCES 30
A-A-51145 TY 1 FORM BInterchangeable
interchangeable cross-reference
interchangeable
0F506Interchangeable
interchangeable cross-reference
interchangeable
A-A-51145DInterchangeable
interchangeable cross-reference
interchangeable
W-L-142Interchangeable
interchangeable cross-reference
interchangeable
W-L-142 TY1CLCST5Interchangeable
interchangeable cross-reference
interchangeable
UL 496Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 9-S-4778L?
9-S-4778L is a SWITCH ASSEMBLY-DIODE.
What parts can replace 9-S-4778L?
There are 30 known substitutes for 9-S-4778L: A-A-51145 TY 1 FORM B, 0F506, A-A-51145D and 27 more. Substitute compatibility should be verified for your specific system.
Is 9-S-4778L still available?
9-S-4778L is currently cancelled.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026