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Technical Data Sheet
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HA1 ✓ 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 EARPHONE ELEMENT is a the manufacturer industrial component. Key specifications include material: STEEL, body_style: EARPHONE ELEMENT, CIRCULAR, connection_style: ROUND EYE, overall_diameter: 1.812 INCHES NOMINAL IN, style_designator: SEMI-POINTED, earphone_element_type: MAGNETIC. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5965-00-661-0463, 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
HA1
NSN: 5965-00-661-0463
FSC: 5965
CAGE: 88440 — AT AND T TECHNOLOGIES INC SUB OF AMERICAN TELEPHONE AND TELEGRAPH KEARNY WORKS (USA)
SPECIFICATIONS
materialSTEEL
body_styleEARPHONE ELEMENT, CIRCULAR
connection_styleROUND EYE
overall_diameter1.812 INCHES NOMINAL IN
style_designatorSEMI-POINTED
earphone_element_typeMAGNETIC
earphone_element_depth0.750 INCHES NOMINAL IN
impedance_rating_in_ohms140.0 NOMINAL
connection_inside_diameter0.3750 INCHES NOMINAL IN
accommodated_material_diameter0.281 INCHES NOMINAL IN
connection_to_body_relationshipPARALLEL
acoustic_sensitivity_reference_ratingNOT RATED
NSN5965-00-661-0463
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available EARPHONE ELEMENT TITLE COMPONENT PN HA1 MFR EARPHONE ELEMENT
KEY FEATURES
•
BODY STYLE: EARPHONE ELEMENT, CIRCULAR
•
OVERALL DIAMETER: 1.812 INCHES NOMINAL IN
•
ACOUSTIC SENSITIVITY REFERENCE RATING: NOT RATED
•
EARPHONE ELEMENT TYPE: MAGNETIC
•
IMPEDANCE RATING IN OHMS: 140.0 NOMINAL
•
EARPHONE ELEMENT DEPTH: 0.750 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS (FLIS)
BODY STYLEEARPHONE ELEMENT, CIRCULAR
OVERALL DIAMETER1.812 INCHES NOMINAL IN
ACOUSTIC SENSITIVITY REFERENCE RATINGNOT RATED
EARPHONE ELEMENT TYPEMAGNETIC
IMPEDANCE RATING IN OHMS140.0 NOMINAL
EARPHONE ELEMENT DEPTH0.750 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 16
RA1-INCH FLANGETTEInterchangeable
interchangeable cross-reference
interchangeable
RA1Interchangeable
interchangeable cross-reference
interchangeable
RA100NPPB52MSC1Interchangeable
interchangeable cross-reference
interchangeable
RA1RA2024VDCInterchangeable
interchangeable cross-reference
interchangeable
559325Interchangeable
interchangeable cross-reference
interchangeable
HA1Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is HA1?
HA1 is a EARPHONE ELEMENT.
What parts can replace HA1?
There are 16 known substitutes for HA1: RA1-INCH FLANGETTE, RA1, RA100NPPB52MSC1 and 13 more. Substitute compatibility should be verified for your specific system.
Is HA1 still available?
HA1 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