BK1/ABC-1/2GX-R Ceramic Fuse Cartridge Equivalent & Substitute Parts

Part Overview

The BK1/ABC-1/2GX-R is a 500 mA ceramic fuse cartridge rated for 250 V AC and 125 V DC operation, manufactured by Eaton - Electronics Division. This fast-blow cartridge fuse is designed for use with 3AB and 3AG holders and measures 1/4" x 1-1/4" (6.35mm x 31.75mm). The part is currently active in production with 810 pieces in stock.

Equivalent and substitute parts are identified when they share identical electrical ratings, mechanical dimensions, package specifications, and mounting requirements. This reference provides engineering-grade alternatives for component selection, procurement planning, and design flexibility.

Substiute Parts

BK1/ABC-1/2GX-R

Eaton - Electronics DivisionIn Stock: 865BK1/ABC-1/2GX-R Datasheet

Current PartRFQ

ABC-1/2-R

Eaton - Electronics DivisionIn Stock: 1016ABC-1/2-R Datasheet

Parametric EquivalentRFQ

BK/ABC-1/2-R

Eaton - Electronics DivisionIn Stock: 865BK/ABC-1/2-R Datasheet

Parametric EquivalentRFQ

0314.500HXP

Littelfuse Inc.In Stock: 25690314.500HXP Datasheet

Parametric EquivalentRFQ

0314.500MXP

Littelfuse Inc.In Stock: 7350314.500MXP Datasheet

Parametric EquivalentRFQ

0314.500VXP

Littelfuse Inc.In Stock: 7960314.500VXP Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the BK1/ABC-1/2GX-R is determined by strict equivalence across the following critical parameters:

Electrical Parameters:

• Current Rating: 500 mA (exact match required)
• Voltage Rating - AC: 250 V (exact match required)
• Voltage Rating - DC: 125 V (exact match required)
• Response Time: Fast Blow (exact match required)
• Breaking Capacity @ Rated Voltage: 35A AC, 10kA DC (exact match required)

Mechanical Parameters:

• Fuse Type: Cartridge, Ceramic (exact match required)
• Package / Case: 3AB, 3AG, 1/4" x 1-1/4" (exact match required)
• Size / Dimension: 0.250" Dia x 1.250" L (6.35mm x 31.75mm) (exact match required)
• Mounting Type: Requires Holder (exact match required)

Compliance Parameters:

• RoHS Status: ROHS3 Compliant (exact match required)
• Approval Agency: CSA, UL minimum (equivalent or expanded certifications acceptable)

All identified substitute parts meet these criteria and are functionally interchangeable within the specified electrical and mechanical constraints.

Parameter Comparison

Engineering Selection Recommendations

All identified substitute parts are functionally equivalent to the BK1/ABC-1/2GX-R and meet the required electrical, mechanical, and compliance specifications.

Eaton - Electronics Division Alternatives:

• ABC-1/2-R and BK/ABC-1/2-R are direct part number variants within the same manufacturer's product line. Both maintain identical electrical ratings, mechanical dimensions, and certifications (CSA, UL). These parts are suitable for direct substitution with no design modifications required.

Littelfuse Inc. Alternatives:

• 0314.500HXP, 0314.500MXP, and 0314.500VXP are cross-manufacturer equivalents from the Littelfuse 314 series. These parts match all critical electrical and mechanical parameters. Littelfuse parts carry expanded certification coverage (CE, CSA, UL) and operate across a wider temperature range (-55°C ~ 125°C). These parts are suitable for direct substitution with no design modifications required.

All substitute parts are ROHS3 compliant and carry active product status, ensuring long-term availability and supply chain continuity.

Frequently Asked Questions (FAQ)

Q: Can ABC-1/2-R be used as a direct replacement for BK1/ABC-1/2GX-R?

A: Yes. ABC-1/2-R is a parametric equivalent manufactured by Eaton - Electronics Division with identical current rating (500 mA), voltage ratings (250 V AC, 125 V DC), fuse type (ceramic cartridge), response time (fast blow), package specification (3AB, 3AG, 1/4" x 1-1/4"), and certifications (CSA, UL). No design modifications are required.

Q: What is the difference between Eaton and Littelfuse substitute options?

A: Eaton alternatives (ABC-1/2-R, BK/ABC-1/2-R) are from the same manufacturer as the primary part. Littelfuse alternatives (0314.500HXP, 0314.500MXP, 0314.500VXP) are cross-manufacturer equivalents from a different supplier. All parts share identical electrical ratings and mechanical dimensions. Littelfuse parts include CE certification in addition to CSA and UL, and operate across a wider temperature range (-55°C ~ 125°C versus unspecified for Eaton parts).

Q: Are the Littelfuse 314 series fuses compatible with 3AB and 3AG holders?

A: Yes. The 0314.500HXP, 0314.500MXP, and 0314.500VXP fuses are specified for 3AB and 3AG holders with identical dimensions (0.250" Dia x 1.250" L / 6.35mm x 31.75mm). These parts are mechanically and electrically compatible with the same holder types required for the BK1/ABC-1/2GX-R.

Q: Do all substitute parts meet RoHS3 compliance?

A: Yes. All identified substitute parts, including both Eaton and Littelfuse options, are ROHS3 compliant. This ensures compatibility with RoHS3-regulated applications and supply chains.

Q: What is the breaking capacity specification, and is it consistent across all parts?

A: Breaking capacity is specified as 35A AC and 10kA DC at rated voltage. This specification is identical across the BK1/ABC-1/2GX-R and all substitute parts, ensuring equivalent fault protection performance.

Q: Are there differences in melting I²t values between Eaton and Littelfuse parts?

A: Yes. Eaton parts (BK1/ABC-1/2GX-R, ABC-1/2-R, BK/ABC-1/2-R) specify a melting I²t of 0.039. Littelfuse parts (0314.500HXP, 0314.500MXP, 0314.500VXP) specify a melting I²t of 0.115. Both values are provided in the technical specifications; however, all parts maintain identical current ratings, voltage ratings, and response time classification (fast blow), ensuring functional equivalence for circuit protection applications.

Q: Can these fuses be used interchangeably in the same circuit?

A: Yes. All substitute parts are parametric equivalents with identical electrical ratings (500 mA, 250 V AC, 125 V DC), response time (fast blow), and breaking capacity (35A AC, 10kA DC). They are mechanically compatible with the same holder types (3AB, 3AG) and maintain the same physical dimensions. Direct substitution is supported without circuit redesign.