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FH21EM — FUSEHOLDER,BLOCK

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

FH21EM: FUSEHOLDER,BLOCK.

The FUSEHOLDER,BLOCK is a the manufacturer industrial component. Key specifications include material: PLASTIC PHENOLIC BODY, body_style: CLIP CONNECTED TYPE, overall_width: 1.375 INCHES NOMINAL IN, base_thickness: 0.175 INCHES MINIMUM AND 0.199 INCHES MAXIMUM IN, overall_height: 0.607 INCHES MINIMUM AND 0.627 INCHES MAXIMUM IN, overall_length: 2.375 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 5920-00-681-2954, 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→ FH21EM
NSN: 5920-00-681-2954
FSC: 5920 — Fuses, Arrestors, Absorbers, and Protectors
CAGE: 81349 — MILITARY SPECIFICATIONS PROMULGATED BY MILITARY DEPARTMENTS/AGENCIES UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M
SPECIFICATIONS
materialPLASTIC PHENOLIC BODY
body_styleCLIP CONNECTED TYPE
overall_width1.375 INCHES NOMINAL IN
base_thickness0.175 INCHES MINIMUM AND 0.199 INCHES MAXIMUM IN
overall_height0.607 INCHES MINIMUM AND 0.627 INCHES MAXIMUM IN
overall_length2.375 INCHES NOMINAL IN
voltage_in_volts250.0
mounting_hole_styleIN-LINE ALONG THE WIDTH
mounting_hole_diameter0.125 INCHES NOMINAL IN
mounting_hole_quantity4
accommodated_fuse_length1.000 INCHES NOMINAL IN
terminal_type_and_quantity8 TAB, SOLDER LUG
NSN5920-00-681-2954
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available FUSEHOLDER,BLOCK TITLE COMPONENT PN FH21EM MFR FUSEHOLDER,BLOCK
KEY FEATURES
•
ACCOMMODATED FUSE LENGTH: 1.000 INCHES NOMINAL IN
•
MOUNTING HOLE QUANTITY: 4
•
BODY STYLE: CLIP CONNECTED TYPE
•
INTERNAL CIRCUIT CONFIGURATION AND POLE QUANTITY: 4 POLE, DOUBLE BRANCH, FUSED
•
MOUNTING HOLE STYLE: IN-LINE ALONG THE WIDTH
•
VOLTAGE IN VOLTS: 250.0
•
MOUNTING HOLE DIAMETER: 0.125 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
ACCOMMODATED FUSE LENGTH1.000 INCHES NOMINAL IN
MOUNTING HOLE QUANTITY4
OVERALL HEIGHT0.607 INCHES MINIMUM AND 0.627 INCHES MAXIMUM IN
BODY STYLECLIP CONNECTED TYPE
INTERNAL CIRCUIT CONFIGURATION AND POLE QUANTITY4 POLE, DOUBLE BRANCH, FUSED
MOUNTING HOLE STYLEIN-LINE ALONG THE WIDTH
VOLTAGE IN VOLTS250.0
MOUNTING HOLE DIAMETER0.125 INCHES NOMINAL IN
OVERALL LENGTH2.375 INCHES NOMINAL IN
OVERALL WIDTH1.375 INCHES NOMINAL IN
SUBSTITUTES & CROSS-REFERENCES 1
3828-4Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
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 FH21EM?
FH21EM is a FUSEHOLDER,BLOCK. It is classified as a MRO (MRO_GENERAL).
What parts can replace FH21EM?
There is 1 known substitute for FH21EM: 3828-4. Substitute compatibility should be verified for your specific system.
What is the NSN for FH21EM?
FH21EM is cataloged in the U.S. Government catalog under NSN 5920-00-681-2954. 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.