PartsTable
Technical Data Sheet
PartsTable / MRO / 52-21-01
52-21-01 ✓ Verified by PartsTable
— · MRO · MRO_GENERAL
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

FILTER,RADIO FREQUENCY INTERFERE. Key specifications include overall_width: 0.900 INCHES NOMINAL IN, overall_length: 2.200 INCHES MAXIMUM IN, special_features: FILTER, RFI DB-25 FEMALE/FEMALE, end_item_identification: AUTOMATED WEATHER SENSOR SYSTEM (AWSS), connector_locking_method: LOCK TAB, unthreaded_mounting_hole_diameter: 0.160 INCHES NOMINAL IN. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5935-01-399-2558, 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→ 52-21-01
NSN: 5935-01-399-2558
FSC: 5935
CAGE: 0D3H0 — AIRBORN INTERCONNECT, LLC (USA)
SPECIFICATIONS
overall_width0.900 INCHES NOMINAL IN
overall_length2.200 INCHES MAXIMUM IN
special_featuresFILTER, RFI DB-25 FEMALE/FEMALE
mating_end_quantity2
end_item_identificationAUTOMATED WEATHER SENSOR SYSTEM (AWSS)
connector_locking_methodLOCK TAB
unthreaded_mounting_hole_diameter0.160 INCHES NOMINAL IN
NSN5935-01-399-2558
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available FILTER,RADIO FREQUENCY INTERFERE TITLE COMPONENT PN 52-21-01 MFR FILTER,RADIO FREQUENCY
KEY FEATURES
•
CONNECTOR LOCKING METHOD: LOCK TAB
•
MATING END QUANTITY: 2
•
UNTHREADED MOUNTING HOLE DIAMETER: 0.160 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS (FLIS)
CONNECTOR LOCKING METHODLOCK TAB
END ITEM IDENTIFICATIONAUTOMATED SURFACE OBSERVING SYSTEM (ASOS)
SPECIAL FEATURESADAPTER SHALL BE A FILTER/SURGE SUPPRESSOR TO PERFORM EMI AND SURGE PROTECTION ON TELEPHONE SIGNALS. THE FILTER/SUPPRESSOR SHALL OPERATE WITH NORMAL SWITCHED TELEPHONE SIGNAL LEVELS. IT MUST PASS THE AC RING VOLTAGE OF APPROXIMATELY 170 VAC AS WELL AS AUDIO UP TO 4KHZ. THERE SHALL BE 4 PINS ON EACH FILTER. ALL 4 PINS SHALL BE FILTERED AND PROTECTED FOR SURGE. SURGE PROTECTION SHALL BE SHUNTED TO CASE GROUND. CURRENT RATING - LOAD CURRENT 0.5 AMPERES PER PIN; OPERATING VOLTAGE - 200 VAC; DC RESISTANCE - 0.2 OHMS OR LESS. THE INPUT END OF THE HOUSING SHALL HAVE A RJ-11 SOCKET TELEPHONE CONNECTOR AND A MOUNTING FLANGE. THE FLANGE SHALL HAVE TWO 4-40 SCREW INSERTS. THE OUTPUT END SHALL HAVE A RJ-11 CONNECTOR. THE PINS SHALL BE WIRED PIN TO PIN KHz
MATING END QUANTITY2
UNTHREADED MOUNTING HOLE DIAMETER0.160 INCHES NOMINAL IN
OVERALL LENGTH2.200 INCHES MAXIMUM IN
OVERALL WIDTH0.900 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 7
52-21-01Interchangeable
interchangeable cross-reference
interchangeable
M433011Interchangeable
interchangeable cross-reference
interchangeable
M43011Interchangeable
interchangeable cross-reference
interchangeable
52-20-01Interchangeable
interchangeable cross-reference
interchangeable
M443012Interchangeable
interchangeable cross-reference
interchangeable
62828-90149-1Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 52-21-01?
52-21-01 is a FILTER,RADIO FREQUENCY INTERFERE. It is classified as a MRO (MRO_GENERAL).
What parts can replace 52-21-01?
There are 7 known substitutes for 52-21-01: 52-21-01, M433011, M43011 and 4 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 52-21-01?
52-21-01 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5935-01-399-2558. 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