PartsTable
Technical Data Sheet
Download PDF

2021-12-B — ARRESTER,ELECTRICAL SURGE

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

2021-12-B: ARRESTER,ELECTRICAL SURGE.

The ARRESTER,ELECTRICAL SURGE is a the manufacturer industrial component. Key specifications include usage_design: INDOOR, arrester_type: GAS, body_material: CERAMIC, terminal_type: WIRE LEAD, overall_length: 4.230 INCHES NOMINAL IN, mounting_method: WIRE LEAD. This part is cataloged in the U.S.

Government catalog under NSN 5920-01-056-2818, 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→ 2021-12-B
NSN: 5920-01-056-2818
FSC: 5920 — Fuses, Arrestors, Absorbers, and Protectors
CAGE: 23663 — JOSLYN PRODUCTS (USA)
SPECIFICATIONS
usage_designINDOOR
arrester_typeGAS
body_materialCERAMIC
terminal_typeWIRE LEAD
overall_length4.230 INCHES NOMINAL IN
mounting_methodWIRE LEAD
overall_diameter0.312 INCHES NOMINAL IN
breakdown_voltage750.000 VOLTS NOMINAL
terminal_quantity2
mounting_configurationTERMINAL MOUNTED
NSN5920-01-056-2818
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available ARRESTER,ELECTRICAL SURGE TITLE COMPONENT PN 2021-12-B MFR ARRESTER,ELECTRICAL SU
KEY FEATURES
•
TERMINAL QUANTITY: 2
•
USAGE DESIGN: INDOOR
•
TERMINAL TYPE: WIRE LEAD
•
OVERALL DIAMETER: 0.312 INCHES NOMINAL IN
•
MOUNTING METHOD: WIRE LEAD
•
BREAKDOWN VOLTAGE: 750.000 VOLTS NOMINAL
•
ARRESTER TYPE: GAS
TECHNICAL CHARACTERISTICS
TERMINAL QUANTITY2
USAGE DESIGNINDOOR
TERMINAL TYPEWIRE LEAD
OVERALL DIAMETER0.312 INCHES NOMINAL IN
MOUNTING METHODWIRE LEAD
BREAKDOWN VOLTAGE750.000 VOLTS NOMINAL
ARRESTER TYPEGAS
OVERALL LENGTH4.230 INCHES NOMINAL IN
BODY MATERIALCERAMIC
MOUNTING CONFIGURATIONTERMINAL MOUNTED
SUBSTITUTES & CROSS-REFERENCES 2
2021-12Reference document
Same NSN cross-reference
Reference document — Secondary reference
SGSP250Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusCancelled· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
Ready to buy 2021-12-B?
Compare prices from verified sellers on eBay
Buy on eBay →
As an eBay Partner, PartsTable may earn a commission. Your price is not affected.
FREQUENTLY ASKED QUESTIONS
What is 2021-12-B?
2021-12-B is a ARRESTER,ELECTRICAL SURGE. It is classified as a MRO (MRO_GENERAL).
What parts can replace 2021-12-B?
There are 2 known substitutes for 2021-12-B: 2021-12, SGSP250. Substitute compatibility should be verified for your specific system.
What is the NSN for 2021-12-B?
2021-12-B is cataloged in the U.S. Government catalog under NSN 5920-01-056-2818. This indicates validated use in U.S. government and defense supply chains.
Community Feedback
Leave a Comment
Comments are reviewed before appearing. You will receive an email to verify before your comment appears.

Request a Quote — 2021-12-B

✓ 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.