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 ELECTRON TUBE is a the manufacturer industrial component. Key specifications include tube_type: IGNITRON, special_features: ENVELOPE MATERIAL: METAL, nondefinitive_spec/std_data: 5550 TYPE. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5960-00-669-8515, 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
RELEASE 521
NSN:5960-00-669-8515 FSC:5960 CAGE:80131 — ELECTRONIC INDUSTRIES ASSOCIATION
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FREQUENTLY ASKED QUESTIONS
What is RELEASE 521?
RELEASE 521 is a ELECTRON TUBE.
What parts can replace RELEASE 521?
There are 17 known substitutes for RELEASE 521: 5550, 1523, 05550-091-030 and 14 more. Substitute compatibility should be verified for your specific system.
Is RELEASE 521 still available?
RELEASE 521 is currently cancelled.
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