Equivalent & Substitute Parts for BK/C520-375MA

Part Overview

The BK/C520-375MA is a 375 mA, 250 V AC fast-blow glass cartridge fuse manufactured by Eaton - Electronics Division, designed for 2AG holder applications with 5mm x 15mm dimensions. This component is classified as obsolete, necessitating identification of active equivalent alternatives that maintain electrical and mechanical compatibility for continued system operation and procurement.

Substiute Parts

BK/C520-375MA

Eaton - Electronics DivisionIn Stock: 1120BK/C520-375MA 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 of the obsolete BK/C520-375MA is determined by strict equivalence across the following critical parameters:

Mandatory Matching Parameters:

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

All three substitute parts—0225.375HXP, 0225.375MXP, and 0225.375VXP—manufactured by Littelfuse Inc. from the 225 series—satisfy these mandatory parameters. These substitutes are active products with current manufacturing status and enhanced compliance certifications. The substitutes provide additional DC voltage rating capability (125 V DC) not specified in the original part, representing an enhancement rather than a limitation.

Parameter Comparison

Engineering Selection Recommendations

All three Littelfuse 225 series substitutes—0225.375HXP, 0225.375MXP, and 0225.375VXP—are qualified replacements for the obsolete BK/C520-375MA based on electrical and mechanical parameter equivalence. The substitutes maintain active product status with current manufacturing availability.

The Littelfuse alternatives provide enhanced compliance certifications including CE marking in addition to CSA and UL approvals held by the original part. All substitutes achieve ROHS3 compliance, addressing regulatory requirements not met by the obsolete Eaton component.

The substitutes feature improved DC breaking capacity (10kA DC versus unspecified in the original) and expanded operating temperature range (-55°C to 125°C), providing broader application flexibility. DC voltage rating of 125 V on the substitutes extends functionality beyond the AC-only specification of the original part.

Selection among the three substitute options may be determined by internal procurement specifications, supplier relationships, or packaging preferences, as all three parts are electrically and mechanically equivalent.

Frequently Asked Questions (FAQ)

Q: Can the Littelfuse 0225.375HXP, 0225.375MXP, or 0225.375VXP directly replace the Eaton BK/C520-375MA?

A: Yes. All three Littelfuse substitutes match the mandatory electrical parameters (375 mA, 250 V AC, fast-blow response) and mechanical specifications (2AG, 5mm x 15mm package, cartridge glass type, holder-mount configuration). Physical and electrical compatibility is confirmed.

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

A: The 0225.375HXP, 0225.375MXP, and 0225.375VXP are electrically and mechanically identical. All three are 375 mA, 250 V AC, 125 V DC fast-blow glass cartridge fuses in 2AG package format. Differences, if any, relate to internal manufacturing variants or packaging configurations not specified in the provided technical data.

Q: Does the DC voltage rating on the Littelfuse substitutes affect AC-only applications?

A: No. The 125 V DC rating on the Littelfuse substitutes represents additional capability. For AC-only applications matching the original BK/C520-375MA specification, the 250 V AC rating remains the controlling parameter, and the DC rating does not impact performance.

Q: Are the Littelfuse substitutes compatible with existing 2AG fuse holders?

A: Yes. All substitutes conform to the 2AG standard package format (5mm x 15mm) and are designed for use with standard 2AG fuse holders. Physical dimensions and holder interface are equivalent to the original part.

Q: What compliance advantages do the Littelfuse substitutes provide?

A: The Littelfuse alternatives achieve ROHS3 compliance and CE marking, in addition to maintaining CSA and UL certifications present on the original part. These certifications support regulatory compliance in applications subject to environmental and safety standards.