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Technical Data Sheet
PartsTable / COMPONENT / 558254
558254 ✓ Verified by PartsTable
Legrand · 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 Legrand industrial component. Key specifications include body_width: 1.781 INCHES NOMINAL IN, body_height: 2.156 INCHES NOMINAL IN, body_length: 1.891 INCHES NOMINAL IN, inclosure_type: FULLY INCLOSED, mounting_method: THREADED STUD(S) SINGLE GROUP, frequency_rating: 300.0 HERTZ MINIMUM AND 4.0 KILOHERTZ MAXIMUM SINGLE COMPONENT. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5950-00-178-8514, 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
558254
NSN: 5950-00-178-8514
FSC: 5950
CAGE: 57733 — STEWART-WARNER CORPORATION (USA)
SPECIFICATIONS
body_width1.781 INCHES NOMINAL IN
body_height2.156 INCHES NOMINAL IN
body_length1.891 INCHES NOMINAL IN
inclosure_typeFULLY INCLOSED
mounting_methodTHREADED STUD(S) SINGLE GROUP
frequency_rating300.0 HERTZ MINIMUM AND 4.0 KILOHERTZ MAXIMUM SINGLE COMPONENT
nominal_thread_size0.138 INCHES SINGLE GROUP IN
reliability_indicatorNOT ESTABLISHED
impedance_rating_in_ohms500.0 NOMINAL SINGLE COMPONENT ALL SECONDARY
thread_quantity_per_inch32 SINGLE GROUP
thread_series_designatorUNIFIED NATIONAL COARSE (UNC) SINGLE GROUP
winding_shielding_methodINTERNAL SHIELD GROUNDED TO INCLOSURE SINGLE COMPONENT
NSN5950-00-178-8514
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR MFR: Legrand TRANSFORMER,AUDIO FREQUENCY TITLE COMPONENT PN 558254 MFR Legrand TRANSFORMER,AUDIO FREQ
KEY FEATURES
•
THREAD SERIES DESIGNATOR: UNIFIED NATIONAL COARSE (UNC) SINGLE GROUP
•
WINDING FUNCTION AND QUANTITY: 1 PRIMARY AND 2 SECONDARY SINGLE COMPONENT
•
FREQUENCY RATING: 300.0 HERTZ MINIMUM AND 4.0 KILOHERTZ MAXIMUM SINGLE COMPONENT
•
IMPEDANCE RATING IN OHMS: 500.0 NOMINAL SINGLE COMPONENT ALL SECONDARY
•
MAXIMUM TRANSFORMER POWER RATING: 3.0 WATTS SINGLE COMPONENT
•
PRIMARY TO SECONDARY TURN RATIO: 3.3 TO 1 SINGLE COMPONENT
•
CENTER TO CENTER DISTANCE BETWEEN MOUNTING FACILITIES PARALLEL TO WIDTH: 1.062 INCHES NOMINAL SINGLE MOUNTING FACILITY SINGLE CENTER GROUP IN
•
BODY LENGTH: 1.891 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS (FLIS)
THREAD SERIES DESIGNATORUNIFIED NATIONAL COARSE (UNC) SINGLE GROUP
WINDING FUNCTION AND QUANTITY1 PRIMARY AND 2 SECONDARY SINGLE COMPONENT
FREQUENCY RATING300.0 HERTZ MINIMUM AND 4.0 KILOHERTZ MAXIMUM SINGLE COMPONENT
IMPEDANCE RATING IN OHMS500.0 NOMINAL SINGLE COMPONENT ALL SECONDARY
MAXIMUM TRANSFORMER POWER RATING3.0 WATTS SINGLE COMPONENT
PRIMARY TO SECONDARY TURN RATIO3.3 TO 1 SINGLE COMPONENT
CENTER TO CENTER DISTANCE BETWEEN MOUNTING FACILITIES PARALLEL TO WIDTH1.062 INCHES NOMINAL SINGLE MOUNTING FACILITY SINGLE CENTER GROUP IN
BODY LENGTH1.891 INCHES NOMINAL IN
RELIABILITY INDICATORNOT ESTABLISHED
BODY HEIGHT2.156 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 3
558254Interchangeable
interchangeable cross-reference
interchangeable
564392Interchangeable
interchangeable cross-reference
interchangeable
30331Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 558254?
558254 is a TRANSFORMER,AUDIO FREQUENCY manufactured by Legrand.
What parts can replace 558254?
There are 3 known substitutes for 558254: 558254, 564392, 30331. Substitute compatibility should be verified for your specific system.
What is the NSN for 558254?
558254 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5950-00-178-8514. 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