BK8/ABC-8-R Equivalent & Substitute Parts

Part Overview

The BK8/ABC-8-R is an 8 A ceramic cartridge fuse rated for 250 V AC and 125 V DC operation, manufactured by Eaton - Electronics Division. This component is classified as obsolete product status. Due to its obsolescence, identifying equivalent and substitute parts from active product lines is necessary to maintain system functionality and ensure continued availability for replacement applications. The fuse requires a compatible holder (3AB, 3AG format) and is designed for fast-blow response characteristics in circuit protection applications.

Substiute Parts

BK8/ABC-8-R

Eaton - Electronics DivisionIn Stock: 731BK8/ABC-8-R Datasheet

Current PartRFQ

ABC-8-R

Eaton - Electronics DivisionIn Stock: 1230ABC-8-R Datasheet

Parametric EquivalentRFQ

BK/ABC-8-R

Eaton - Electronics DivisionIn Stock: 1649BK/ABC-8-R Datasheet

Parametric EquivalentRFQ

BK/GBB-8-R

Eaton - Electronics DivisionIn Stock: 3821BK/GBB-8-R Datasheet

Parametric EquivalentRFQ

GBB-8-R

Eaton - Electronics DivisionIn Stock: 927GBB-8-R Datasheet

Parametric EquivalentRFQ

0314008.HXP

Littelfuse Inc.In Stock: 20640314008.HXP Datasheet

Parametric EquivalentRFQ

0314008.MXP

Littelfuse Inc.In Stock: 12440314008.MXP Datasheet

Parametric EquivalentRFQ

0314008.VXP

Littelfuse Inc.In Stock: 9470314008.VXP Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the BK8/ABC-8-R are determined by strict equivalence across the following critical parameters:

Mandatory Matching Parameters:

• Current Rating: 8 A
• Voltage Rating - AC: 250 V
• Voltage Rating - DC: 125 V
• Fuse Type: Cartridge, Ceramic
• Response Time: Fast Blow
• Package / Case: 3AB, 3AG, 1/4" x 1-1/4" (6.35mm x 31.75mm)
• Mounting Type: Requires Holder

All substitute parts listed below maintain identical electrical and mechanical specifications across these parameters. Variations in breaking capacity, DC cold resistance, melting I²t, and approval agencies are noted but do not preclude substitution when the mandatory parameters align.

Parameter Comparison

Engineering Selection Recommendations

Primary Recommendation - Eaton Active Alternatives:

The ABC-8-R and BK/ABC-8-R are direct active-status replacements from Eaton - Electronics Division. Both maintain identical electrical specifications and approval certifications (CSA, UL) to the obsolete BK8/ABC-8-R. These parts are preferred for applications requiring continuity with the original design and certification lineage.

Secondary Recommendation - Eaton GBB Series:

The GBB-8-R and BK/GBB-8-R are active Eaton alternatives within the same manufacturer ecosystem. These parts meet all mandatory electrical and mechanical parameters. The GBB series carries CSA and UR approvals. Minor variations in DC cold resistance (0.0136 Ω versus 0.014 Ω) are within acceptable engineering tolerance for ceramic cartridge fuses.

Cross-Manufacturer Alternative - Littelfuse 314 Series:

The Littelfuse 0314008.HXP, 0314008.MXP, and 0314008.VXP are parametrically equivalent alternatives from an independent manufacturer. These parts satisfy all mandatory electrical and mechanical requirements and carry expanded approval certifications (CE, CSA, K-MARK, PSE, UL). The Littelfuse parts feature higher breaking capacity (750A AC) and broader operating temperature range (-55°C to 125°C). Selection of Littelfuse alternatives is appropriate when cross-manufacturer sourcing is acceptable and expanded certifications provide system-level benefits.

Note on 0314008.VXP: This part exhibits a DC cold resistance specification of 0.153 Ω, which differs significantly from other listed alternatives. Verify compatibility with circuit design requirements before selection.

Frequently Asked Questions (FAQ)

Q: Can I substitute the obsolete BK8/ABC-8-R with any of the listed alternatives?

A: Yes. All listed parts maintain identical current rating (8 A), voltage ratings (250 V AC / 125 V DC), fuse type (ceramic cartridge), response time (fast blow), and physical package (3AB, 3AG, 1/4" x 1-1/4"). These parameters determine functional equivalence for circuit protection applications.

Q: What is the difference between Eaton ABC-8-R and BK/ABC-8-R?

A: Both are active Eaton products with identical electrical and mechanical specifications. The designation difference reflects internal Eaton product line nomenclature. Both are direct substitutes for the obsolete BK8/ABC-8-R.

Q: Are Littelfuse 314 series fuses compatible with the same holder as the Eaton parts?

A: Yes. All listed parts conform to the 3AB, 3AG package standard with dimensions 1/4" x 1-1/4" (6.35mm x 31.75mm). Physical compatibility with existing holders is confirmed.

Q: Why do some parts list different breaking capacities?

A: Breaking capacity (200A AC versus 750A AC) reflects the maximum fault current the fuse can safely interrupt. All listed parts maintain the required 10kA DC breaking capacity. Higher AC breaking capacity in Littelfuse parts provides additional margin in high-fault-current applications but does not affect substitution compatibility for standard circuit protection.

Q: What approvals should I verify for my application?

A: The original BK8/ABC-8-R carries CSA and UL approvals. Eaton alternatives (ABC-8-R, BK/ABC-8-R, GBB-8-R, BK/GBB-8-R) maintain CSA approval. Littelfuse alternatives carry expanded certifications including CE, CSA, K-MARK, PSE, and UL. Confirm that your application requirements align with the approval agencies listed for your selected substitute.

Q: Is there a difference in response time between these fuses?

A: No. All listed parts are specified as fast-blow fuses. Response time characteristics are identical across all alternatives.

Q: Can I use 0314008.VXP as a direct substitute?

A: The 0314008.VXP meets all mandatory electrical and mechanical parameters. However, its DC cold resistance specification (0.153 Ω) differs from other alternatives. Verify that this resistance value is compatible with your circuit design before selection.