Equivalent & Substitute Parts for BK/C515-1.25A

Part Overview

The BK/C515-1.25A is a 1.25 A, 250 V AC/DC slow-blow glass cartridge fuse in 2AG package format (5mm x 15mm axial). Manufactured by Eaton - Electronics Division, this component is classified as obsolete product status. Due to its obsolete designation, equivalent substitute parts with active product status are available to ensure continued circuit protection functionality and design continuity in applications requiring this current and voltage rating.

Substiute Parts

BK/C515-1.25A

Eaton - Electronics DivisionIn Stock: 1148BK/C515-1.25A Datasheet

Current PartRFQ

BK/C515-1.25-R

Eaton - Electronics DivisionIn Stock: 1108BK/C515-1.25-R Datasheet

DirectRFQ

BK/C515S-1.25-R

Eaton - Electronics DivisionIn Stock: 1153BK/C515S-1.25-R Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the BK/C515-1.25A is determined by strict equivalence across the following critical parameters:

• Current Rating: 1.25 A (exact match required)
• Voltage Rating: 250 V AC (exact match required)
• Fuse Type: Cartridge, Glass (exact match required)
• Package / Case: 2AG, 5mm x 15mm (Axial) (exact match required)
• Response Time: Slow Blow (exact match required)
• Breaking Capacity: 100 A (exact match required)
• Melting I²t: 22.961 (exact match required)
• Mounting Type: Through Hole (exact match required)

Two substitute parts meet all electrical and mechanical parameters:

1. BK/C515-1.25-R (Direct Manufacturer Substitute): Active product status, RoHS Compliant
2. BK/C515S-1.25-R (Parametric Equivalent): Active product status, RoHS Compliant

Both substitutes maintain identical electrical characteristics, physical dimensions, and performance specifications as the main part.

Parameter Comparison

Engineering Selection Recommendations

Primary Recommendation: BK/C515-1.25-R

The BK/C515-1.25-R is the direct manufacturer substitute with active product status. This part is RoHS Compliant and maintains full electrical and mechanical equivalence to the obsolete BK/C515-1.25A. Selection of this part ensures continued availability and compliance with current environmental regulations.

Secondary Recommendation: BK/C515S-1.25-R

The BK/C515S-1.25-R is a parametric equivalent with active product status and RoHS Compliance. This part provides identical electrical performance and physical compatibility. The "S" designation indicates a variant within the C515 series that meets all substitution criteria.

Both substitute parts carry CSA and UL approvals, matching the certification profile of the main part. The transition from the obsolete BK/C515-1.25A to either active substitute ensures uninterrupted circuit protection without design modification.

Frequently Asked Questions (FAQ)

Q: Can BK/C515-1.25-R be used as a direct replacement for BK/C515-1.25A?

A: Yes. The BK/C515-1.25-R is electrically and mechanically equivalent across all critical parameters: 1.25 A current rating, 250 V voltage rating, slow-blow response, 2AG package format, 100 A breaking capacity, and 22.961 melting I²t. Physical dimensions and mounting type are identical.

Q: What is the difference between BK/C515-1.25-R and BK/C515S-1.25-R?

A: Both parts are parametrically equivalent with identical electrical specifications and physical dimensions. The "S" designation in BK/C515S-1.25-R indicates a variant within the C515 series. Both are active products with RoHS Compliance and CSA/UL approvals.

Q: Why is the main part BK/C515-1.25A listed as obsolete?

A: The BK/C515-1.25A has reached end-of-life status. Active substitute parts with identical specifications are available to maintain design continuity and ensure component availability for new production and field replacements.

Q: Are the substitute parts compatible with existing PCB designs?

A: Yes. Both BK/C515-1.25-R and BK/C515S-1.25-R maintain the same through-hole mounting type, axial orientation, and 5mm x 15mm physical dimensions as the main part. No PCB layout modifications are required.

Q: What is the difference in RoHS compliance between the main part and substitutes?

A: The BK/C515-1.25A is RoHS non-compliant, while both substitute parts (BK/C515-1.25-R and BK/C515S-1.25-R) are RoHS Compliant. This compliance upgrade aligns with current environmental and regulatory requirements for electronic components.

Q: Do the substitute parts have the same breaking capacity?

A: Yes. All three parts have a breaking capacity of 100 A at rated voltage, ensuring equivalent fault protection performance in circuit applications.

Q: Can these fuses be used in AC and DC applications?

A: The specifications indicate 250 V AC rating. All electrical parameters are based on AC voltage rating. Application in DC circuits requires verification against the specific circuit requirements and voltage levels.