BK/C515S-3.5-R Equivalent & Substitute Parts

Part Overview

The BK/C515S-3.5-R is a 3.5 A 125 V AC/DC slow-blow glass cartridge fuse manufactured by Eaton - Electronics Division. This component is classified as a Through Hole mounted fuse in the 2AG package format with dimensions of 5mm x 15mm (Axial). The part maintains Active product status and is RoHS Compliant, making it suitable for current circuit protection applications requiring slow-blow response characteristics.

Identifying equivalent and substitute parts is necessary when managing inventory constraints, addressing supply chain disruptions, or standardizing component selections across multiple production batches while maintaining identical electrical and mechanical performance.

Substiute Parts

BK/C515S-3.5-R

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

Current PartRFQ

BK/C515-3.5-R

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

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the BK/C515S-3.5-R is determined by strict equivalence across the following critical parameters:

Electrical Parameters:

• Current Rating: 3.5 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)
• DC Cold Resistance: 0.028 Ohms (exact match required)
• Melting I²t: 149.279 (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 (exact match required)

All substitute parts listed below satisfy these criteria without exception.

Parameter Comparison

Engineering Selection Recommendations

The BK/C515-3.5-R serves as a direct parametric equivalent to the BK/C515S-3.5-R. Both components are manufactured by Eaton - Electronics Division and maintain Active product status with UL approval certification.

The primary distinction between these parts is the RoHS compliance designation: BK/C515S-3.5-R carries RoHS Compliant status, while BK/C515-3.5-R carries ROHS3 Compliant status. Both designations satisfy current regulatory requirements for electronic component manufacturing and distribution.

Selection between these equivalent parts should be based on specific supply chain requirements, inventory availability, and compliance documentation requirements for your application. Both parts are electrically and mechanically interchangeable within circuits designed for 3.5 A 125 V AC/DC slow-blow fuse protection.

Frequently Asked Questions (FAQ)

Q: Can BK/C515-3.5-R replace BK/C515S-3.5-R in existing circuit designs?

A: Yes. Both parts are parametric equivalents with identical electrical characteristics (3.5 A, 125 V AC/DC, slow-blow response, 400 A breaking capacity) and mechanical specifications (2AG package, 5mm x 15mm, Through Hole mounting). Direct substitution is supported without circuit modification.

Q: What is the difference between RoHS Compliant and ROHS3 Compliant designations?

A: Both designations indicate compliance with Restriction of Hazardous Substances regulations. ROHS3 represents the current iteration of the directive. Both statuses satisfy modern regulatory requirements for component procurement and use.

Q: Are the physical dimensions identical between these parts?

A: Yes. Both BK/C515S-3.5-R and BK/C515-3.5-R share identical dimensions of 0.217" Dia x 0.598" L (5.50mm x 15.20mm) and use the same 2AG package format. They are mechanically interchangeable in Through Hole mounting applications.

Q: What is the melting I²t value and why is it important?

A: The melting I²t value of 149.279 defines the thermal energy required to melt the fuse element. This parameter ensures consistent and predictable fuse operation under fault conditions. Both equivalent parts maintain this identical specification.

Q: Can these fuses be used in DC applications?

A: Yes. Both parts are rated for 125 V AC/DC operation. The DC Cold Resistance specification of 0.028 Ohms applies to both components, supporting DC circuit protection applications.

Q: What does the 400 A breaking capacity specification indicate?

A: The breaking capacity of 400 A at rated voltage (125 V) specifies the maximum fault current the fuse can safely interrupt without rupturing or creating hazardous conditions. Both equivalent parts maintain this identical specification.