Equivalent & Substitute Parts for BK/ABC-3XO Ceramic Fuse Cartridge

Part Overview

The BK/ABC-3XO is a 3 A ceramic fuse cartridge rated for 250 V AC and 125 V DC operation, manufactured by Eaton - Electronics Division. This fast-blow cartridge fuse requires a compatible holder (3AB, 3AG format) and is designed for circuit protection in industrial and commercial applications. The part is currently active in production with 741 pieces in stock.

Substitute parts are identified when equivalent electrical ratings, mechanical dimensions, and functional characteristics align with the original specification, enabling direct replacement without circuit redesign or holder modification.

Substiute Parts

BK/ABC-3XO

Eaton - Electronics DivisionIn Stock: 809BK/ABC-3XO Datasheet

Current PartRFQ

0314003.HXP

Littelfuse Inc.In Stock: 27790314003.HXP Datasheet

DirectRFQ

0314003.MXP

LittelfuseIn Stock: 16620314003.MXP Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the BK/ABC-3XO is determined by strict alignment of the following parameters:

Mandatory Matching Parameters:

• Current Rating: 3 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"
• Breaking Capacity @ Rated Voltage: 100 A AC, 10 kA DC

Acceptable Variation Parameters:

• Melting I²t: Minor variation permitted within thermal response envelope
• DC Cold Resistance: Negligible variation acceptable
• Physical dimensions: Tolerance within holder compatibility range
• Approval agencies: Equivalent or expanded certifications acceptable
• RoHS compliance: Enhanced compliance acceptable

The substitute parts 0314003.HXP and 0314003.MXP, both manufactured by Littelfuse Inc., meet all mandatory matching parameters and are therefore qualified as direct equivalents.

Parameter Comparison

Engineering Selection Recommendations

Direct Substitution Eligibility:

Both 0314003.HXP and 0314003.MXP are qualified as direct substitutes for BK/ABC-3XO based on electrical and mechanical parameter equivalence. Both parts are active products with current manufacturing status.

Compliance Considerations:

The Littelfuse substitute parts (0314003.HXP and 0314003.MXP) provide expanded regulatory compliance, including CE, K-MARK, and PSE certifications in addition to CSA and UL. Both are ROHS3 compliant, whereas the original BK/ABC-3XO is RoHS non-compliant. This enhanced compliance may be advantageous for applications subject to environmental or regional regulatory requirements.

Inventory Availability:

0314003.HXP: 2673 pieces in stock 0314003.MXP: 1633 pieces in stock BK/ABC-3XO: 741 pieces in stock

Thermal Response:

The Littelfuse parts exhibit a lower melting I²t value (14.6 versus 19.5), indicating a faster thermal response. This difference remains within acceptable parameters for fast-blow ceramic cartridge fuses and does not preclude substitution in standard circuit protection applications.

Physical Dimensions:

Minor dimensional variation exists between the original and substitute parts. The Littelfuse parts measure 0.250" diameter × 1.250" length, compared to the Eaton part at 0.266" diameter × 1.292" length. Both dimensions remain compatible with standard 3AB and 3AG holder specifications.

Frequently Asked Questions (FAQ)

Q: Can 0314003.HXP and 0314003.MXP be used interchangeably with BK/ABC-3XO?

A: Yes. Both Littelfuse parts meet all mandatory electrical and mechanical parameters: 3 A current rating, 250 V AC / 125 V DC voltage ratings, fast-blow ceramic cartridge type, and 3AB/3AG package compatibility. Direct substitution is supported without circuit modification.

Q: What is the difference between 0314003.HXP and 0314003.MXP?

A: Both parts are electrically and mechanically identical. They share the same current rating, voltage ratings, breaking capacity, melting I²t, DC cold resistance, physical dimensions, operating temperature range, and regulatory certifications. Selection between them is based on inventory availability and procurement lead time.

Q: Are the physical dimension differences between BK/ABC-3XO and the Littelfuse substitutes significant?

A: No. The Littelfuse parts measure 0.250" diameter × 1.250" length versus the Eaton part at 0.266" diameter × 1.292" length. Both dimensions fall within the tolerance range for 3AB and 3AG holder compatibility and do not affect functional performance or mechanical fit.

Q: Does the lower melting I²t value of the Littelfuse parts affect circuit protection performance?

A: No. The melting I²t difference (14.6 versus 19.5) represents a faster thermal response within the fast-blow ceramic fuse category. This variation is acceptable for standard circuit protection applications and does not compromise protection characteristics.

Q: What regulatory advantages do the Littelfuse substitutes offer?

A: The 0314003.HXP and 0314003.MXP parts carry expanded certifications (CE, CSA, K-MARK, PSE, UL) and are ROHS3 compliant, compared to the original BK/ABC-3XO which carries only CSA and UL certifications and is RoHS non-compliant. Enhanced compliance may be required for applications in regulated markets or industries.

Q: Can I mix BK/ABC-3XO and Littelfuse substitute parts in the same circuit or equipment?

A: Yes. All three parts are functionally equivalent and can be used together in the same application without performance degradation or compatibility issues.

Q: What holder types are compatible with these fuse cartridges?

A: All three parts require a compatible holder and are specified for 3AB and 3AG holder types with 1/4" × 1-1/4" dimensions. Verify holder compatibility before installation.