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AT-1668 ✓ 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 body_width: 1.125 INCHES NOMINAL IN, body_height: 1.188 INCHES NOMINAL IN, body_length: 1.438 INCHES NOMINAL IN, inclosure_type: FULLY INCLOSED, overall_length: 2.062 INCHES NOMINAL IN, mounting_method: FLANGE AND UNTHREADED HOLE(S) SINGLE GROUP. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4920-00-651-3952, 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
AT-1668
NSN: 4920-00-651-3952
FSC: 4920
CAGE: 11599 — TRIUMPH ENGINE CONTROL SYSTEMS LLC (USA)
SPECIFICATIONS
body_width1.125 INCHES NOMINAL IN
body_height1.188 INCHES NOMINAL IN
body_length1.438 INCHES NOMINAL IN
inclosure_typeFULLY INCLOSED
overall_length2.062 INCHES NOMINAL IN
mounting_methodFLANGE AND UNTHREADED HOLE(S) SINGLE GROUP
frequency_rating200.0 HERTZ MINIMUM AND 6000.0 HERTZ MAXIMUM SINGLE COMPONENT
special_featuresCOMPANY ITEM NAME-STAND, CHECKING FIXTURE
reliability_indicatorNOT ESTABLISHED
mounting_hole_diameter0.187 INCHES NOMINAL SINGLE GROUP IN
impedance_rating_in_ohms45.0 NOMINAL SINGLE COMPONENT SINGLE PRIMARY
mounting_facility_quantity2 SINGLE GROUP
NSN4920-00-651-3952
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available TRANSFORMER,AUDIO FREQUENCY TITLE COMPONENT PN AT-1668 MFR TRANSFORMER,AUDIO FREQ
TECHNICAL CHARACTERISTICS (FLIS)
SPECIAL FEATURESCOMPANY ITEM NAME-STAND, CHECKING FIXTURE
VERIFIED SUBSTITUTES & CROSS-REFERENCES 3
PE-120Interchangeable
interchangeable cross-reference
interchangeable
C91Interchangeable
interchangeable cross-reference
interchangeable
51856Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is AT-1668?
AT-1668 is a TRANSFORMER,AUDIO FREQUENCY.
What parts can replace AT-1668?
There are 3 known substitutes for AT-1668: PE-120, C91, 51856. Substitute compatibility should be verified for your specific system.
What is the NSN for AT-1668?
AT-1668 is cataloged in the Federal Logistics Information System (FLIS) under NSN 4920-00-651-3952. 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