Equivalent & Substitute Parts for BK/C519-1A

Part Overview

The BK/C519-1A is a 1 A, 250 V AC/DC slow-blow glass cartridge fuse manufactured by Eaton - Electronics Division. This fuse is designed for 2AG holder applications with a 5mm x 15mm form factor. The part is currently classified as obsolete, making identification of equivalent and substitute components essential for ongoing maintenance, repair, and new design applications. Substitute parts must maintain identical electrical ratings, mechanical dimensions, and functional characteristics to ensure proper circuit protection without modification to existing fuse holders or circuit designs.

Substiute Parts

BK/C519-1A

Eaton - Electronics DivisionIn Stock: 731BK/C519-1A Datasheet

Current PartRFQ

BK/C519-1-R

Eaton - Electronics DivisionIn Stock: 1045BK/C519-1-R Datasheet

DirectRFQ

0229001.MXP

Littelfuse Inc.In Stock: 26360229001.MXP Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the BK/C519-1A are classified based on strict electrical and mechanical compatibility criteria. The primary substitution logic is determined by the following parameters:

Critical Matching Parameters:

• Current Rating: 1 A (exact match required)
• Voltage Rating - AC: 250 V (exact match required)
• Fuse Type: Cartridge, Glass (exact match required)
• Response Time: Slow Blow (exact match required)
• Package / Case: 2AG, 5mm x 15mm (exact match required)
• Mounting Type: Requires Holder (exact match required)

Direct Substitute (BK/C519-1-R): This Eaton part maintains all critical electrical and mechanical parameters identical to the main part. The primary difference is product status (Active vs. Obsolete) and packaging format (Bulk vs. standard). RoHS compliance status differs, with BK/C519-1-R meeting ROHS3 requirements.

Similar Substitute (0229001.MXP): This Littelfuse part matches all critical electrical and mechanical parameters. Additional DC voltage rating (125 V DC) and extended operating temperature range (-55°C ~ 125°C) are provided specifications. Melting I²t value (5.64) differs from the main part (14.289), indicating different thermal response characteristics within the slow-blow classification. Breaking capacity for DC applications is specified at 10 kA.

Parameter Comparison

Engineering Selection Recommendations

For Direct Replacement (BK/C519-1-R): The BK/C519-1-R is the primary substitute for the obsolete BK/C519-1A. Both parts are manufactured by Eaton - Electronics Division and maintain identical electrical and mechanical specifications. The BK/C519-1-R is currently in active production status with improved RoHS3 compliance. This part is suitable for direct substitution in all applications where the original BK/C519-1A was specified, with no circuit modifications required.

For Alternative Substitution (0229001.MXP): The 0229001.MXP from Littelfuse Inc. is a functionally equivalent alternative that meets all critical electrical and mechanical requirements for 2AG fuse holder compatibility. This part provides additional certifications (CE, PSE) beyond the original part's CSA and UL approvals. The 0229001.MXP includes DC voltage rating specification (125 V DC) and extended operating temperature range (-55°C ~ 125°C), providing enhanced environmental performance. However, dimensional variance (4.50mm diameter vs. 5.20mm) and different melting I²t value (5.64 vs. 14.289) indicate different thermal response characteristics. The 0229001.MXP is suitable for applications requiring enhanced environmental specifications or multi-standard compliance.

Compliance Considerations: Both substitute parts meet current RoHS3 compliance requirements, addressing regulatory requirements that may not have been applicable to the original obsolete part. Selection between BK/C519-1-R and 0229001.MXP should be based on specific application requirements regarding DC voltage rating, operating temperature range, and required certifications.

Frequently Asked Questions (FAQ)

Q: Can BK/C519-1-R be used as a direct replacement for BK/C519-1A? A: Yes. The BK/C519-1-R maintains identical current rating (1 A), AC voltage rating (250 V), fuse type (cartridge glass), response time (slow blow), package format (2AG, 5mm x 15mm), and breaking capacity (35 A). Both parts are manufactured by Eaton - Electronics Division and are compatible with the same 2AG fuse holders. No circuit modifications are required.

Q: What are the key differences between BK/C519-1-R and 0229001.MXP? A: Both parts share identical current rating, AC voltage rating, fuse type, response time, and 2AG package designation. Key differences include: manufacturer (Eaton vs. Littelfuse), melting I²t value (14.289 vs. 5.64), DC cold resistance (0.14 Ohms vs. 0.212 Ohms), physical diameter (5.20mm vs. 4.50mm), DC voltage rating specification (not specified vs. 125 V), operating temperature range (not specified vs. -55°C ~ 125°C), and certifications (CSA, UL vs. CE, CSA, PSE, UL).

Q: Will 0229001.MXP fit in a 2AG fuse holder designed for BK/C519-1A? A: The 0229001.MXP is designated as a 2AG package format and is mechanically compatible with standard 2AG fuse holders. However, the diameter specification (4.50mm vs. 5.20mm) indicates a slightly smaller physical dimension. Verification with the specific fuse holder design is recommended to confirm fit tolerance.

Q: What does the melting I²t value indicate, and why does it differ between substitutes? A: The melting I²t value represents the thermal energy required to melt the fuse element and is a measure of thermal response. Both the BK/C519-1A (14.289) and 0229001.MXP (5.64) are classified as slow-blow fuses, but the different I²t values indicate different thermal response curves within the slow-blow classification. This affects the fuse's behavior under transient overcurrent conditions.

Q: Are both substitute parts RoHS compliant? A: Yes. The BK/C519-1-R is ROHS3 compliant. The 0229001.MXP is ROHS3 compliant. The original BK/C519-1A is classified as RoHS non-compliant. Both substitutes meet current RoHS3 regulatory requirements.

Q: What certifications do these fuses carry? A: BK/C519-1A carries CSA and UL approvals. BK/C519-1-R carries CSA and UL approvals. 0229001.MXP carries CE, CSA, PSE, and UL approvals. The 0229001.MXP provides additional international certifications including CE (European Conformity) and PSE (Product Safety Electrical, Japan).

Q: Can these fuses be used in DC applications? A: The BK/C519-1A and BK/C519-1-R are rated for 250 V AC with no specified DC voltage rating. The 0229001.MXP is rated for 250 V AC and 125 V DC. For DC applications, the 0229001.MXP is the appropriate choice among these three parts.