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77A1 — FILTER,RADIO FREQUENCY INTERFERE

✓ Government record, cited
— · MRO · MRO_GENERAL
PRODUCT OVERVIEW

77A1: FILTER,RADIO FREQUENCY INTERFERE.

FILTER,RADIO FREQUENCY INTERFERE. Key specifications include body_width: 2.470 INCHES MINIMUM AND 2.750 INCHES MAXIMUM IN, body_height: 1.910 INCHES MINIMUM AND 1.970 INCHES MAXIMUM IN, body_length: 2.630 INCHES MINIMUM AND 2.690 INCHES MAXIMUM IN, inclosure_type: ENCASED, overall_length: 3.940 INCHES MINIMUM AND 4.000 INCHES MAXIMUM IN, style_designator: RECTANGULAR TERMINAL/TERMINALS ON OPPOSITE SURFACES. This part is cataloged in the U.S.

Government catalog under NSN 5915-00-501-3334, 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
MRO→ MRO_GENERAL→ 77A1
NSN: 5915-00-501-3334
NIINs: 005013334, 005337336
FSC: 5915 — Filters and Networks
CAGE: 72914 — GRIMES AEROSPACE COMPANY (USA)
SPECIFICATIONS
body_width2.470 INCHES MINIMUM AND 2.750 INCHES MAXIMUM IN
body_height1.910 INCHES MINIMUM AND 1.970 INCHES MAXIMUM IN
body_length2.630 INCHES MINIMUM AND 2.690 INCHES MAXIMUM IN
inclosure_typeENCASED
overall_length3.940 INCHES MINIMUM AND 4.000 INCHES MAXIMUM IN
style_designatorRECTANGULAR TERMINAL/TERMINALS ON OPPOSITE SURFACES
nominal_thread_size0.190 INCHES IN
load_impedance_per_function50.0 OHMS BLANK LOCATION NOT OTHERWISE SPECIFIED
mounting_facility_type_and_quantity1 THREADED HOLE(S) LOCATION NOT OTHERWISE SPECIFIED
source_impedance_rating_per_function50.0 OHMS BLANK LOCATION NOT OTHERWISE SPECIFIED
functional_terminal_type_and_quantity1 WIRE LEAD OUTPUT SECOND FUNCTION
operating_current_rating_per_function_in_amps5.0 BLANK LOCATION NOT OTHERWISE SPECIFIED
NSN5915-00-501-3334
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available FILTER,RADIO FREQUENCY INTERFERE TITLE COMPONENT PN 77A1 MFR FILTER,RADIO FREQUENCY
KEY FEATURES
•
MOUNTING FACILITY TYPE AND QUANTITY: 1 THREADED HOLE(S) LOCATION NOT OTHERWISE SPECIFIED
•
INCLOSURE TYPE: ENCASED
•
DISTANCE BETWEEN CENTERLINES OF MOUNTING FACILITIES PARALLEL TO BODY LENGTH: 3.365 INCHES MINIMUM AND 3.385 INCHES MAXIMUM IN
•
FUNCTIONAL TERMINAL TYPE AND QUANTITY: 1 WIRE LEAD OUTPUT SECOND FUNCTION
•
SOURCE IMPEDANCE RATING PER FUNCTION: 50.0 OHMS BLANK LOCATION NOT OTHERWISE SPECIFIED
•
BODY WIDTH: 2.470 INCHES MINIMUM AND 2.750 INCHES MAXIMUM IN
•
BODY HEIGHT: 1.910 INCHES MINIMUM AND 1.970 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS
MOUNTING FACILITY TYPE AND QUANTITY1 THREADED HOLE(S) LOCATION NOT OTHERWISE SPECIFIED
INCLOSURE TYPEENCASED
DISTANCE BETWEEN CENTERLINES OF MOUNTING FACILITIES PARALLEL TO BODY LENGTH3.365 INCHES MINIMUM AND 3.385 INCHES MAXIMUM IN
FUNCTIONAL TERMINAL TYPE AND QUANTITY1 WIRE LEAD OUTPUT SECOND FUNCTION
FUNCTIONAL TERMINAL TYPE AND QUANTITY1 WIRE LEAD INPUT FIRST FUNCTION
SOURCE IMPEDANCE RATING PER FUNCTION50.0 OHMS BLANK LOCATION NOT OTHERWISE SPECIFIED
BODY WIDTH2.470 INCHES MINIMUM AND 2.750 INCHES MAXIMUM IN
BODY HEIGHT1.910 INCHES MINIMUM AND 1.970 INCHES MAXIMUM IN
STYLE DESIGNATORRECTANGULAR TERMINAL/TERMINALS ON OPPOSITE SURFACES
MOUNTING FACILITY SCREW THREAD SERIES DESIGNATORUNF
SUBSTITUTES & CROSS-REFERENCES 1
NF202Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 77A1?
77A1 is a FILTER,RADIO FREQUENCY INTERFERE. It is classified as a MRO (MRO_GENERAL).
What parts can replace 77A1?
There is 1 known substitute for 77A1: NF202. Substitute compatibility should be verified for your specific system.
What is the NSN for 77A1?
77A1 is cataloged in the U.S. Government catalog under NSN 5915-00-501-3334. 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.