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B21509 — FUSEHOLDER,BLOCK

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

B21509: FUSEHOLDER,BLOCK.

The FUSEHOLDER,BLOCK is a the manufacturer industrial component. Key specifications include material: ALUMINUM CONTACT, body_style: SIDE BARRIER TYPE, overall_width: 0.562 INCHES NOMINAL IN, overall_height: 0.500 INCHES NOMINAL IN, overall_length: 2.562 INCHES NOMINAL IN, voltage_in_volts: 300.0. This part is cataloged in the U.S.

Government catalog under NSN 5920-01-381-8407, 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→ B21509
NSN: 5920-01-381-8407
FSC: 5920 — Fuses, Arrestors, Absorbers, and Protectors
CAGE: 01014 — AVTRON AEROSPACE INC (USA)
SPECIFICATIONS
materialALUMINUM CONTACT
body_styleSIDE BARRIER TYPE
overall_width0.562 INCHES NOMINAL IN
overall_height0.500 INCHES NOMINAL IN
overall_length2.562 INCHES NOMINAL IN
voltage_in_volts300.0
mounting_hole_styleONE HOLE MOUNTING
mounting_hole_quantity1
accommodated_fuse_length1.750 INCHES NOMINAL IN
terminal_type_and_quantity2 TAB, SOLDER LUG
fuse_accommodation_quantity1
current_carrying_rating_in_amps25.0
NSN5920-01-381-8407
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available FUSEHOLDER,BLOCK TITLE COMPONENT PN B21509 MFR FUSEHOLDER,BLOCK
KEY FEATURES
•
ACCOMMODATED FUSE LENGTH: 1.750 INCHES NOMINAL IN
•
MOUNTING HOLE QUANTITY: 1
•
BODY STYLE: SIDE BARRIER TYPE
•
MOUNTING HOLE STYLE: ONE HOLE MOUNTING
•
VOLTAGE IN VOLTS: 300.0
TECHNICAL CHARACTERISTICS
ACCOMMODATED FUSE LENGTH1.750 INCHES NOMINAL IN
MOUNTING HOLE QUANTITY1
OVERALL HEIGHT0.500 INCHES NOMINAL IN
BODY STYLESIDE BARRIER TYPE
MOUNTING HOLE STYLEONE HOLE MOUNTING
VOLTAGE IN VOLTS300.0
OVERALL LENGTH2.562 INCHES NOMINAL IN
OVERALL WIDTH0.562 INCHES NOMINAL IN
FUSE TERMINAL TYPE ACCOMMODATEDTAB, SOLDER LUG
CURRENT CARRYING RATING IN AMPS25.0
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 B21509?
B21509 is a FUSEHOLDER,BLOCK. It is classified as a MRO (MRO_GENERAL).
What is the NSN for B21509?
B21509 is cataloged in the U.S. Government catalog under NSN 5920-01-381-8407. 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.