Equivalent & Substitute Parts for BK/C515-3.5A

Part Overview

The BK/C515-3.5A is a 3.5 A 125 V AC/DC fuse cartridge manufactured by Eaton - Electronics Division. This component is a glass through-hole fuse in the 2AG package format with 5mm x 15mm dimensions and slow-blow response characteristics. The part is currently classified as obsolete, necessitating identification of active equivalent alternatives for ongoing procurement and system maintenance.

Substiute Parts

BK/C515-3.5A

Eaton - Electronics DivisionIn Stock: 884BK/C515-3.5A Datasheet

Current PartRFQ

BK/C515-3.5-R

Eaton - Electronics DivisionIn Stock: 1863BK/C515-3.5-R Datasheet

DirectRFQ

BK/C515S-3.5-R

Eaton - Electronics DivisionIn Stock: 1065BK/C515S-3.5-R Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the BK/C515-3.5A is determined by strict equivalence across the following critical parameters:

• Current Rating: 3.5 A (exact match required)
• Voltage Rating (AC): 125 V (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 @ Rated Voltage: 400 A (exact match required)
• Melting I²t: 149.279 (exact match required)
• Mounting Type: Through Hole (exact match required)
• DC Cold Resistance: 0.028 Ohms (exact match required)

Two active substitute parts meet all parametric requirements: BK/C515-3.5-R and BK/C515S-3.5-R. Both are manufactured by Eaton - Electronics Division and maintain identical electrical and mechanical specifications to the obsolete BK/C515-3.5A.

Parameter Comparison

Engineering Selection Recommendations

Both BK/C515-3.5-R and BK/C515S-3.5-R are direct parametric equivalents to the obsolete BK/C515-3.5A. Selection between these two active alternatives should be based on the following criteria:

BK/C515-3.5-R is recommended for applications where ROHS3 compliance is required. This part is actively stocked with 1769 units available and carries ROHS3 Compliant certification along with REACH Unaffected status.

BK/C515S-3.5-R is recommended for applications requiring RoHS Compliant certification. This part is actively stocked with 1039 units available and carries RoHS Compliant designation.

Both parts are supplied in bulk packaging and maintain identical electrical performance, mechanical dimensions, and UL approval to the original BK/C515-3.5A. The choice between them depends solely on regulatory compliance requirements for the end application.

Frequently Asked Questions (FAQ)

Q: Can BK/C515-3.5-R and BK/C515S-3.5-R be used interchangeably with BK/C515-3.5A?

A: Yes. Both substitute parts are parametrically identical to BK/C515-3.5A across all critical electrical and mechanical specifications, including current rating, voltage rating, fuse type, package format, response time, breaking capacity, and resistance characteristics.

Q: What is the difference between BK/C515-3.5-R and BK/C515S-3.5-R?

A: The primary difference is regulatory compliance status. BK/C515-3.5-R carries ROHS3 Compliant certification with REACH Unaffected status. BK/C515S-3.5-R carries RoHS Compliant certification. All other electrical and mechanical parameters are identical.

Q: Why is the original BK/C515-3.5A classified as obsolete?

A: The BK/C515-3.5A is obsolete and has been superseded by active alternatives BK/C515-3.5-R and BK/C515S-3.5-R, which offer improved regulatory compliance status while maintaining identical performance specifications.

Q: Are there any packaging differences between the substitute parts?

A: Both substitute parts are supplied in bulk packaging, whereas the original BK/C515-3.5A was supplied with standard packaging. The fuse cartridges themselves maintain identical 2AG, 5mm x 15mm dimensions and through-hole mounting configuration.

Q: Which substitute part should be selected for new designs?

A: For new designs, selection should be based on the regulatory compliance requirements of the target application. BK/C515-3.5-R is suitable for applications requiring ROHS3 compliance. BK/C515S-3.5-R is suitable for applications requiring RoHS compliance. Both are actively manufactured and stocked.