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R3B1E — PROTECTOR,TELEPHONE

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

R3B1E: PROTECTOR,TELEPHONE.

The PROTECTOR,TELEPHONE is a the manufacturer industrial component. Key specifications include special_features: REGULATOR, HIGH PRESSURE, end_item_identification: AK R21 NDS GENERATOR. This part is cataloged in the U.S.

Government catalog under NSN 5920-01-651-0722, 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→ R3B1E
NSN: 5920-01-651-0722
FSC: 5920 — Fuses, Arrestors, Absorbers, and Protectors
CAGE: 3P1P8 — COMBUSTION CONTROLS INC (USA)
SPECIFICATIONS
special_featuresREGULATOR, HIGH PRESSURE
end_item_identificationAK R21 NDS GENERATOR
NSN5920-01-651-0722
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available PROTECTOR,TELEPHONE TITLE COMPONENT PN R3B1E MFR PROTECTOR,TELEPHONE
TECHNICAL CHARACTERISTICS
SPECIAL FEATURESREGULATOR, HIGH PRESSURE
END ITEM IDENTIFICATIONAK R21 NDS GENERATOR
OTHER ITEMS IN FSC 5920 — Fuses, Arrestors, Absorbers, and Protectors
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5920-00-001-3111 5920-00-001-3260 5920-00-001-3261 5920-00-001-3262 5920-00-001-3263 5920-00-001-3264 5920-00-001-3296 5920-00-001-3840
SUBSTITUTES & CROSS-REFERENCES

No substitute or cross-reference records for this part.

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 R3B1E?
R3B1E is a PROTECTOR,TELEPHONE. It is classified as a MRO (MRO_GENERAL).
What is the NSN for R3B1E?
R3B1E is cataloged in the U.S. Government catalog under NSN 5920-01-651-0722. 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.