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AU4003B — TRANSFORMER,AUDIO FREQUENCY

✓ Government record, cited
— · COMPONENT
PRODUCT OVERVIEW

AU4003B: TRANSFORMER,AUDIO FREQUENCY.

The TRANSFORMER,AUDIO FREQUENCY is a the manufacturer industrial component. Key specifications include body_width: 0.458 INCHES MAXIMUM IN, body_height: 0.625 INCHES MAXIMUM IN, body_length: 0.780 INCHES MAXIMUM IN, inclosure_type: OPEN, mounting_method: TERMINAL SINGLE GROUP, frequency_rating: 400.0 HERTZ NOMINAL SINGLE COMPONENT. This part is cataloged in the U.S.

Government catalog under NSN 5950-00-578-1111, 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
AU4003B
NSN: 5950-00-578-1111
FSC: 5950 — Coils and Transformers
CAGE: 53854 — MAGNESPEC INC (USA)
SPECIFICATIONS
body_width0.458 INCHES MAXIMUM IN
body_height0.625 INCHES MAXIMUM IN
body_length0.780 INCHES MAXIMUM IN
inclosure_typeOPEN
mounting_methodTERMINAL SINGLE GROUP
frequency_rating400.0 HERTZ NOMINAL SINGLE COMPONENT
transformer_functionLINE
reliability_indicatorNOT ESTABLISHED
impedance_rating_in_ohms1000.0 NOMINAL SINGLE COMPONENT SINGLE SECONDARY
winding_operating_current2.0 MILLIAMPERES AC MAXIMUM SINGLE COMPONENT SINGLE PRIMARY
terminal_type_and_quantity4 WIRE LEAD
winding_function_and_quantity1 PRIMARY AND 1 SECONDARY SINGLE COMPONENT
NSN5950-00-578-1111
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available TRANSFORMER,AUDIO FREQUENCY TITLE COMPONENT PN AU4003B MFR TRANSFORMER,AUDIO FREQ
KEY FEATURES
•
TRANSFORMER FUNCTION: LINE
•
INCLOSURE TYPE: OPEN
•
MOUNTING METHOD: TERMINAL SINGLE GROUP
•
BODY WIDTH: 0.458 INCHES MAXIMUM IN
•
BODY HEIGHT: 0.625 INCHES MAXIMUM IN
•
WINDING FUNCTION AND QUANTITY: 1 PRIMARY AND 1 SECONDARY SINGLE COMPONENT
•
IMPEDANCE RATING IN OHMS: 1000.0 NOMINAL SINGLE COMPONENT SINGLE SECONDARY
TECHNICAL CHARACTERISTICS
TRANSFORMER FUNCTIONLINE
INCLOSURE TYPEOPEN
MOUNTING METHODTERMINAL SINGLE GROUP
BODY WIDTH0.458 INCHES MAXIMUM IN
BODY HEIGHT0.625 INCHES MAXIMUM IN
WINDING FUNCTION AND QUANTITY1 PRIMARY AND 1 SECONDARY SINGLE COMPONENT
IMPEDANCE RATING IN OHMS1000.0 NOMINAL SINGLE COMPONENT SINGLE SECONDARY
IMPEDANCE RATING IN OHMS20000.0 NOMINAL SINGLE COMPONENT SINGLE PRIMARY
BODY LENGTH0.780 INCHES MAXIMUM IN
WINDING OPERATING CURRENT2.0 MILLIAMPERES AC MAXIMUM SINGLE COMPONENT SINGLE PRIMARY
OTHER ITEMS IN FSC 5950 — Coils and Transformers
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5950-00-000-0146 5950-00-001-1372 5950-00-001-1386 5950-00-001-1410 5950-00-001-1411 5950-00-001-1412 5950-00-001-1413 5950-00-001-1414
SUBSTITUTES & CROSS-REFERENCES 5
311903Reference document
Same NSN cross-reference
Reference document — Secondary reference
AU403Reference document
Same NSN cross-reference
Reference document — Secondary reference
1993023-1Reference document
Same NSN cross-reference
Reference document — Secondary reference
A11903Reference document
Same NSN cross-reference
Reference document — Secondary reference
AR432Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Insurance item — stocked against contingency demandNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is AU4003B?
AU4003B is a TRANSFORMER,AUDIO FREQUENCY.
What parts can replace AU4003B?
There are 5 known substitutes for AU4003B: 311903, AU403, 1993023-1 and 2 more. Substitute compatibility should be verified for your specific system.
What is the NSN for AU4003B?
AU4003B is cataloged in the U.S. Government catalog under NSN 5950-00-578-1111. This indicates validated use in U.S. government and defense supply chains.
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✓ PartsTable — the parts reference. Every fact cited to its source.
PartsTable Design LLC · partstable.com
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
PartsTable commercial catalog: edition Unified commercial catalog snapshot through 2026-09-28, edition date not on file, retrieved 2026-09-28.