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SA-521/A ✓ 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 SA-521/A is a the manufacturer industrial component. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5985-00-837-9973, 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
SA-521/A
NSN: 5985-00-837-9973
FSC: 5985
CAGE: 80058 — JOINT ELECTRONICS TYPE DESIGNATION SYSTEM (USA)
SPECIFICATIONS
Part NumberSA-521/A
NSN5985-00-837-9973
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available SA-521/A TITLE COMPONENT PN SA-521/A MFR SA-521/A
KEY FEATURES
•
FREQUENCY RATING: 0.0 GIGAHERTZ MINIMUM AND 1.2 GIGAHERTZ MAXIMUM SINGLE FREQUENCY RF POWER HANDLING
•
POLE QUANTITY: 1
•
SWITCH OPERATION SEQUENCE: BREAKS BEFORE MAKES
•
COUPLING POSITION QUANTITY: 2
•
THROW QUANTITY: 2
•
SWITCH TYPE: NONTRANSFER
•
CONNECTOR END DESIGN: FEMALE
TECHNICAL CHARACTERISTICS (FLIS)
FREQUENCY RATING0.0 GIGAHERTZ MINIMUM AND 1.2 GIGAHERTZ MAXIMUM SINGLE FREQUENCY RF POWER HANDLING
POLE QUANTITY1
SWITCH OPERATION SEQUENCEBREAKS BEFORE MAKES
COUPLING POSITION QUANTITY2
THROW QUANTITY2
SWITCH TYPENONTRANSFER
CONNECTOR END DESIGNFEMALE
FREQUENCY RATING1.2 GIGAHERTZ NOMINAL SINGLE FREQUENCY INSERTION LOSS REFERENCE
COAXIAL CONNECTOR SERIES DESIGNATIONN
ACTUATOR CURRENT TYPE AND RATING IN AMPS1.0 DC MAXIMUM
VERIFIED SUBSTITUTES & CROSS-REFERENCES 8
MIL-S-25879Interchangeable
interchangeable cross-reference
interchangeable
MIL-DTL-25879Interchangeable
interchangeable cross-reference
interchangeable
SA-521A/A W/O MTGInterchangeable
interchangeable cross-reference
interchangeable
11989Interchangeable
interchangeable cross-reference
interchangeable
MT-1995/AInterchangeable
interchangeable cross-reference
interchangeable
MILS25879AInterchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is SA-521/A?
SA-521/A is a SA-521/A.
What parts can replace SA-521/A?
There are 8 known substitutes for SA-521/A: MIL-S-25879, MIL-DTL-25879, SA-521A/A W/O MTG and 5 more. Substitute compatibility should be verified for your specific system.
Is SA-521/A still available?
SA-521/A 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