BK/C515S-1.25-R Equivalent & Substitute Parts

Part Overview

The BK/C515S-1.25-R 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 Active product status and is RoHS Compliant. The fuse is designed for through-hole mounting applications requiring circuit protection with slow-blow response characteristics. Substitute parts are identified when inventory constraints, supply chain disruptions, or procurement requirements necessitate alternative sourcing while maintaining identical electrical and mechanical specifications.

Substiute Parts

BK/C515S-1.25-R

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

Current PartRFQ

BK/C515-1.25-R

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

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the BK/C515S-1.25-R are identified based on strict parametric equivalence. The following electrical and mechanical parameters must match exactly to qualify as a direct substitute:

• Current Rating: 1.25 A
• Voltage Rating (AC): 250 V
• Fuse Type: Cartridge, Glass
• Package / Case: 2AG, 5mm x 15mm (Axial)
• Response Time: Slow Blow
• Breaking Capacity @ Rated Voltage: 100 A
• Melting I²t: 22.961
• DC Cold Resistance: 0.13 Ohms
• Mounting Type: Through Hole
• Approval Agency: CSA, UL certification

The primary substitute identified is BK/C515-1.25-R, which maintains all critical electrical and mechanical parameters. This part differs only in packaging designation but delivers identical performance characteristics in circuit protection applications.

Parameter Comparison

Engineering Selection Recommendations

Both BK/C515S-1.25-R and BK/C515-1.25-R are Active product status components manufactured by Eaton - Electronics Division. Both parts carry CSA and UL approval certifications and maintain RoHS Compliance. Selection between these parts is based on inventory availability and procurement requirements, as they are electrically and mechanically equivalent for all circuit protection applications requiring 1.25 A, 250 V AC/DC slow-blow fuse protection in 2AG through-hole format.

The BK/C515S-1.25-R maintains current inventory of 1100 pieces. The BK/C515-1.25-R substitute maintains inventory of 1085 pieces. Both parts are suitable for direct substitution in existing designs without circuit modification or re-qualification.

Frequently Asked Questions (FAQ)

Q: Can BK/C515-1.25-R be used as a direct replacement for BK/C515S-1.25-R?

A: Yes. Both parts are parametrically equivalent across all electrical and mechanical specifications, including current rating, voltage rating, response time, package format, and breaking capacity. Direct substitution is supported without circuit redesign.

Q: What are the critical parameters that define substitution eligibility for this fuse?

A: The following parameters must match exactly: 1.25 A current rating, 250 V AC voltage rating, slow-blow response time, 2AG package format (5mm x 15mm axial), 100 A breaking capacity, 22.961 melting I²t, and 0.13 Ohms DC cold resistance. All substitute parts must also maintain CSA and UL approval certifications.

Q: Are both parts RoHS Compliant?

A: Yes. Both BK/C515S-1.25-R and BK/C515-1.25-R are RoHS Compliant with Moisture Sensitivity Level 1 (Unlimited).

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

A: The parts are electrically and mechanically identical. The designation difference reflects packaging or internal classification only and does not affect performance or compatibility in circuit applications.

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

A: Yes. Both parts are rated for 250 V AC/DC operation, supporting applications in alternating current and direct current circuits within the specified voltage and current parameters.

Q: What is the breaking capacity specification?

A: Both parts have a breaking capacity of 100 A at rated voltage, indicating the maximum fault current the fuse can safely interrupt without component failure.