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Technical Data Sheet
PartsTable / COMPONENT / C18
C18 ✓ 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 TRANSFORMER,AUDIO FREQUENCY is a the manufacturer industrial component. Key specifications include color: NATURAL AND TAN, phase: THREE, shape: STRAIGHT, width: 0.312 INCHES NOMINAL IN, height: 0.156 INCHES NOMINAL IN, length: 14.000 INCHES NOMINAL 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 5220-00-056-5918, 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
C18
NSN: 5220-00-056-5918
FSC: 5220
CAGE: 26630 — COMPAIR, INC (USA)
SPECIFICATIONS
colorNATURAL AND TAN
phaseTHREE
shapeSTRAIGHT
width0.312 INCHES NOMINAL IN
height0.156 INCHES NOMINAL IN
length14.000 INCHES NOMINAL IN
diameter0.491 INCHES MINIMUM AND 0.496 INCHES MAXIMUM IN
materialSTEEL OVERALL
nut_styleSQUARE
thickness0.120 INCHES NOMINAL IN
unit_typeNONREFILLABLE
head_styleFLAT CHAMFER
NSN5220-00-056-5918
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available TRANSFORMER,AUDIO FREQUENCY TITLE COMPONENT PN C18 MFR TRANSFORMER,AUDIO FREQ
TECHNICAL CHARACTERISTICS (FLIS)
SPECIAL FEATURESGAGE,TURBINE VANE
VERIFIED SUBSTITUTES & CROSS-REFERENCES 19
YC4-2SInterchangeable
interchangeable cross-reference
interchangeable
S3127Y-C018Interchangeable
interchangeable cross-reference
interchangeable
2504572-1Interchangeable
interchangeable cross-reference
interchangeable
C18Interchangeable
interchangeable cross-reference
interchangeable
47-631-149-1Interchangeable
interchangeable cross-reference
interchangeable
FERR0WELDInterchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is C18?
C18 is a TRANSFORMER,AUDIO FREQUENCY.
What parts can replace C18?
There are 19 known substitutes for C18: YC4-2S, S3127Y-C018, 2504572-1 and 16 more. Substitute compatibility should be verified for your specific system.
What is the NSN for C18?
C18 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5220-00-056-5918. 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