Equivalent & Substitute Parts for BK/C515-4A

Part Overview

The BK/C515-4A is a 4 A 125 V AC DC fuse cartridge manufactured by Eaton - Electronics Division. This glass through-hole fuse features a 2AG package format with 5mm x 15mm (axial) dimensions and slow-blow response characteristics. The part is classified as obsolete, necessitating identification of active equivalent and substitute components that maintain identical electrical and mechanical specifications for direct circuit board replacement.

Substiute Parts

BK/C515-4A

Eaton - Electronics DivisionIn Stock: 765BK/C515-4A Datasheet

Current PartRFQ

BK/C515-4-R

Eaton - Electronics DivisionIn Stock: 806BK/C515-4-R Datasheet

DirectRFQ

BK/C515S-4-R

Eaton - Electronics DivisionIn Stock: 1066BK/C515S-4-R Datasheet

Parametric EquivalentRFQ

0230004.HXP

Littelfuse Inc.In Stock: 9690230004.HXP Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the BK/C515-4A is determined by strict equivalence across the following critical parameters:

Electrical Parameters:

• Current Rating: 4 A (exact match required)
• Voltage Rating - AC: 125 V (exact match required)
• Response Time: Slow Blow (exact match required)
• Breaking Capacity @ Rated Voltage: 400 A (exact match required)

Mechanical Parameters:

• Fuse Type: Cartridge, Glass (exact match required)
• Package / Case: 2AG, 5mm x 15mm (Axial) (exact match required)
• Mounting Type: Through Hole (exact match required)

Compliance Parameters:

• Approval Agency: UL certification (minimum requirement)

All substitute parts listed maintain these specifications without deviation. Substitutes are grouped into two categories: direct manufacturer equivalents from Eaton - Electronics Division (BK/C515-4-R, BK/C515S-4-R) and parametric equivalents from alternative manufacturers (0230004.HXP).

Parameter Comparison

Engineering Selection Recommendations

Primary Substitutes (Eaton - Electronics Division):

BK/C515-4-R and BK/C515S-4-R are direct manufacturer equivalents from Eaton - Electronics Division. Both parts are active products with identical electrical and mechanical specifications to the obsolete BK/C515-4A. Both achieve RoHS compliance, addressing environmental regulatory requirements. BK/C515S-4-R maintains the highest inventory availability at 960 pieces. Selection between these two Eaton equivalents is based on packaging preference and supply chain availability.

Secondary Substitute (Littelfuse Inc.):

0230004.HXP is a parametric equivalent manufactured by Littelfuse Inc. This part maintains electrical equivalence across current rating, voltage rating, response time, and breaking capacity. Physical dimensions differ slightly (0.177" Dia x 0.571" L versus 0.217" Dia x 0.598" L), and the package classification is listed as non-standard cartridge format rather than standard 2AG. DC cold resistance is marginally higher at 0.0258 Ohms compared to 0.023 Ohms. This part carries expanded approval certifications (CE, CSA, PSE, UL) and ROHS3 compliance. Selection of this substitute requires verification of mechanical fit within the circuit board fuse holder due to dimensional variance.

Frequently Asked Questions (FAQ)

Q: Can BK/C515-4-R directly replace BK/C515-4A without circuit modification?

A: Yes. BK/C515-4-R maintains identical electrical specifications (4 A, 125 V AC, slow-blow response, 400 A breaking capacity) and mechanical dimensions (5mm x 15mm 2AG package, through-hole mounting). Direct substitution is supported without circuit board redesign.

Q: What is the difference between BK/C515-4-R and BK/C515S-4-R?

A: Both parts are electrically and mechanically identical. The primary difference is product designation within the Eaton C515 series. BK/C515S-4-R maintains higher inventory availability (960 pieces versus 793 pieces). Selection may be based on supplier stock status and lead time requirements.

Q: Is 0230004.HXP a suitable replacement for BK/C515-4A?

A: 0230004.HXP maintains electrical equivalence but differs in physical dimensions and package classification. The fuse diameter is 0.177" (4.50mm) compared to 0.217" (5.50mm), and length is 0.571" (14.50mm) compared to 0.598" (15.20mm). Mechanical fit within existing fuse holders must be verified before substitution. DC cold resistance is also marginally higher at 0.0258 Ohms versus 0.023 Ohms.

Q: Does RoHS compliance affect substitution eligibility?

A: RoHS compliance is a regulatory requirement for new product designs and procurement in restricted markets. BK/C515-4A is RoHS non-compliant. Both BK/C515-4-R and BK/C515S-4-R achieve RoHS compliance, making them preferred for applications subject to environmental regulations. 0230004.HXP achieves ROHS3 compliance. Compliance status does not affect electrical or mechanical substitution but influences procurement policy and regulatory acceptance.

Q: What is the significance of the melting I²t value difference between BK/C515-4A and 0230004.HXP?

A: Melting I²t (233.346 for BK/C515-4A versus 148 for 0230004.HXP) indicates the thermal energy required to melt the fuse element. The lower value for 0230004.HXP indicates faster thermal response under fault conditions. This difference, combined with dimensional variance, requires thermal performance verification before substitution in applications with specific time-current curve requirements.

Q: Are all substitute parts UL-approved?

A: Yes. BK/C515-4-R, BK/C515S-4-R, and 0230004.HXP all carry UL approval. 0230004.HXP additionally carries CE, CSA, and PSE certifications, providing broader international regulatory acceptance.