BK/C520-375-R Equivalent & Substitute Parts Reference

Part Overview

The BK/C520-375-R is a 375 mA, 250 V AC fast-blow glass cartridge fuse manufactured by Eaton - Electronics Division, designated for the 2AG package format (5mm x 15mm). This component is classified as obsolete, requiring identification of active equivalent alternatives for continued circuit protection applications. Substitute parts must maintain identical current ratings, voltage specifications, and mechanical form factors to ensure direct compatibility within existing fuse holder assemblies.

Substiute Parts

BK/C520-375-R

Eaton - Electronics DivisionIn Stock: 1032BK/C520-375-R Datasheet

Current PartRFQ

0225.375HXP

Littelfuse Inc.In Stock: 9980225.375HXP Datasheet

DirectRFQ

0225.375MXP

Littelfuse Inc.In Stock: 15250225.375MXP Datasheet

DirectRFQ

0225.375VXP

Littelfuse Inc.In Stock: 11250225.375VXP Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the BK/C520-375-R is determined by strict equivalence across the following parameters:

Critical Matching Parameters:

• Current Rating: 375 mA (exact match required)
• Voltage Rating - AC: 250 V (exact match required)
• Package / Case: 2AG, 5mm x 15mm (exact match required)
• Fuse Type: Cartridge, Glass (exact match required)
• Response Time: Fast Blow (exact match required)
• Mounting Type: Requires Holder (exact match required)

All three substitute parts—0225.375HXP, 0225.375MXP, and 0225.375VXP—manufactured by Littelfuse Inc., satisfy these critical parameters. These parts are classified as active products with current inventory availability. The substitute parts provide enhanced DC voltage rating (125 V DC) and extended operating temperature range (-55°C ~ 125°C) compared to the obsolete original part, while maintaining full AC circuit protection specifications.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitutes: All three Littelfuse 225 series parts (0225.375HXP, 0225.375MXP, 0225.375VXP) are direct functional equivalents for the obsolete BK/C520-375-R.

Compliance Advantages: The substitute parts carry expanded regulatory approvals (CE, CSA, UL) compared to the original part (CSA, UL), providing broader market compliance. All parts maintain ROHS3 compliance and REACH unaffected status.

Inventory Availability: Littelfuse substitutes demonstrate superior stock levels: 0225.375MXP (1493 pcs), 0225.375VXP (1041 pcs), and 0225.375HXP (983 pcs) versus the original part (926 pcs).

Mechanical Compatibility: All substitute parts are physically compatible with existing 2AG fuse holders due to identical package specifications (5mm x 15mm).

Frequently Asked Questions (FAQ)

Q: Can the Littelfuse 0225.375MXP, 0225.375HXP, or 0225.375VXP be used as direct replacements for the BK/C520-375-R?

A: Yes. All three Littelfuse parts meet the critical electrical and mechanical parameters: 375 mA current rating, 250 V AC voltage rating, 2AG package format, fast-blow response, and cartridge glass construction. They install directly into existing BK/C520-375-R fuse holders without modification.

Q: What is the difference between the three Littelfuse substitute parts?

A: The 0225.375HXP, 0225.375MXP, and 0225.375VXP are functionally equivalent. All three share identical electrical specifications, package dimensions, and performance characteristics. Selection may be based on inventory availability or internal part numbering systems.

Q: Do the substitute parts provide additional capabilities?

A: The Littelfuse substitutes include DC voltage rating (125 V DC) and extended operating temperature range (-55°C ~ 125°C), which the original part does not specify. These represent enhanced specifications that do not compromise AC circuit protection performance.

Q: Are there any compatibility concerns with the substitute parts?

A: No compatibility concerns exist for AC applications. The substitute parts maintain identical 250 V AC ratings, 375 mA current ratings, and 2AG mechanical form factors. Physical dimensions are equivalent (5mm x 15mm).

Q: What certifications do the substitute parts carry?

A: All three Littelfuse substitutes carry CE, CSA, and UL approvals, providing broader regulatory coverage than the original BK/C520-375-R (CSA, UL only).