BK/C519-2-R Equivalent & Substitute Parts

Part Overview

The BK/C519-2-R is a 2 A, 250 V AC glass cartridge fuse manufactured by Eaton - Electronics Division. This slow-blow fuse cartridge operates in the 2AG package format (5mm x 15mm) and requires a compatible fuse holder for installation. The part is currently active in production with 1018 pieces in stock.

Substitute parts are identified when equivalent electrical ratings, mechanical dimensions, and approval certifications align with the original specification. The Littelfuse 229 series fuses listed below provide functional equivalence for applications requiring 2 A, 250 V AC protection in the 2AG form factor.

Substiute Parts

BK/C519-2-R

Eaton - Electronics DivisionIn Stock: 1054BK/C519-2-R Datasheet

Current PartRFQ

0229002.HXP

Littelfuse Inc.In Stock: 18080229002.HXP Datasheet

DirectRFQ

0229002.MXP

Littelfuse Inc.In Stock: 23780229002.MXP Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the BK/C519-2-R is determined by the following criteria:

Primary Matching Parameters:

• Current Rating: 2 A (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: Slow Blow (exact match required)

Secondary Compatibility Parameters:

• Mounting Type: Requires Holder (compatible with same holder systems)
• RoHS Compliance: ROHS3 Compliant (all parts meet this requirement)

The Littelfuse 0229002.HXP and 0229002.MXP fuses satisfy all primary matching parameters. Both parts are rated for 2 A at 250 V AC in the 2AG package format with slow-blow response characteristics. The substitute parts provide additional DC voltage rating capability (125 V DC) not specified in the original part, which does not restrict their use in AC-only applications.

Parameter Comparison

Engineering Selection Recommendations

Both Littelfuse substitute parts (0229002.HXP and 0229002.MXP) are suitable replacements for the BK/C519-2-R in applications requiring 2 A, 250 V AC protection in the 2AG package format.

Compliance Considerations:

The substitute parts carry expanded approval certifications (CE, CSA, PSE, UL) compared to the original part (CSA, UL). This broader certification scope supports use in additional regulatory jurisdictions without additional qualification.

Operational Compatibility:

Both substitute parts are rated for the same AC voltage and current specifications as the original part. The additional DC voltage rating (125 V) on the substitute parts does not restrict their application in AC circuits. The slow-blow response characteristic is maintained across all three parts, ensuring consistent protection behavior in inrush-current-sensitive applications.

Physical Compatibility:

The 2AG package dimensions are identical across all three parts, confirming mechanical compatibility with existing fuse holder installations. The slight variation in DC cold resistance (0.059 Ω vs. 0.0698 Ω) is within acceptable tolerance for cartridge fuse applications and does not affect circuit performance.

Inventory Availability:

The Littelfuse substitute parts are available in higher quantities (1797 and 2329 pieces respectively) compared to the original part (1018 pieces), supporting supply chain continuity.

Frequently Asked Questions (FAQ)

Q: Can the Littelfuse 0229002.HXP or 0229002.MXP be used as a direct replacement for the BK/C519-2-R?

A: Yes. Both Littelfuse parts meet the electrical and mechanical requirements for direct substitution. They are rated for 2 A at 250 V AC in the 2AG package format with slow-blow response characteristics. Physical dimensions and holder compatibility are identical.

Q: What is the difference between the 0229002.HXP and 0229002.MXP?

A: Both parts are electrically and mechanically identical. They carry the same electrical ratings, package dimensions, approval certifications, and operating temperature range. The designation difference reflects internal Littelfuse product line categorization and does not affect functional equivalence.

Q: Does the additional 125 V DC rating on the substitute parts affect their use in AC-only applications?

A: No. The DC voltage rating is an additional capability that does not restrict operation in AC circuits. The 250 V AC rating remains the controlling specification for AC applications.

Q: Are the substitute parts compatible with existing fuse holders designed for the BK/C519-2-R?

A: Yes. All three parts use the 2AG package format with identical 5mm x 15mm dimensions. They are mechanically compatible with any fuse holder designed for 2AG cartridge fuses.

Q: What is the significance of the different melting I²t values (60.256 vs. 30)?

A: The melting I²t value characterizes the thermal energy required to melt the fuse element. The lower value on the substitute parts indicates a faster thermal response. Both values are within the slow-blow fuse category and are suitable for general-purpose circuit protection applications. Application-specific thermal requirements should be evaluated during circuit design.

Q: Do all three parts carry the same regulatory approvals?

A: The original BK/C519-2-R carries CSA and UL approvals. The Littelfuse substitute parts carry CE, CSA, PSE, and UL approvals. The broader certification scope of the substitute parts supports compliance in additional regulatory regions.