Equivalent & Substitute Parts for BK/ABC-6KX Ceramic Fuse Cartridge

Part Overview

The BK/ABC-6KX is a 6 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 applications requiring rapid response to overcurrent conditions. The part maintains active product status with 834 pieces currently in stock. Substitute parts are identified to provide alternative sourcing options when the primary part is unavailable or when design requirements necessitate alternative manufacturer specifications.

Substiute Parts

BK/ABC-6KX

Eaton - Electronics DivisionIn Stock: 867BK/ABC-6KX Datasheet

Current PartRFQ

0314006.HXP

Littelfuse Inc.In Stock: 11290314006.HXP Datasheet

DirectRFQ

0314006.MXP

Littelfuse Inc.In Stock: 10030314006.MXP Datasheet

DirectRFQ

0314006.VXP

Littelfuse Inc.In Stock: 12960314006.VXP Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the BK/ABC-6KX is determined by strict equivalence across the following critical parameters:

Mandatory Matching Parameters:

• Current Rating: 6 A (exact match required)
• Voltage Rating - AC: 250 V (exact match required)
• Voltage Rating - DC: 125 V (exact match required)
• Fuse Type: Cartridge, Ceramic (exact match required)
• Response Time: Fast Blow (exact match required)
• Package / Case: 3AB, 3AG, 1/4" x 1-1/4" (exact match required)

Allowable Variations:

• Breaking Capacity: May exceed the main part specification
• Melting I²t: May differ within ceramic fuse cartridge standards
• DC Cold Resistance: Minor variations acceptable within ceramic fuse specifications
• Operating Temperature Range: May exceed the main part specification
• RoHS Compliance: May be more stringent than the main part
• Approval Agencies: May include additional certifications beyond CSA and UL

All three substitute parts (0314006.HXP, 0314006.MXP, 0314006.VXP) manufactured by Littelfuse Inc. meet these substitution criteria and are classified as direct equivalents.

Parameter Comparison

Engineering Selection Recommendations

All three Littelfuse substitute parts (0314006.HXP, 0314006.MXP, 0314006.VXP) are electrically and mechanically equivalent to the BK/ABC-6KX for circuit protection applications requiring 6 A, 250 V AC / 125 V DC ceramic fuse cartridges in 3AB/3AG format.

Compliance Considerations:

The Littelfuse alternatives provide enhanced regulatory coverage with CE, CSA, K-MARK, PSE, and UL certifications compared to the Eaton part's CSA and UL certifications. The Littelfuse parts are ROHS3 compliant, whereas the BK/ABC-6KX is RoHS non-compliant. Applications subject to RoHS requirements should specify one of the Littelfuse substitute parts.

Performance Characteristics:

The Littelfuse substitutes feature higher breaking capacity (750 A AC versus 200 A AC) and higher melting I²t values (45 versus 31.6), indicating enhanced fault current handling capability. These characteristics provide additional safety margin in high-fault-current environments while maintaining identical fast-blow response characteristics for normal overcurrent protection.

Physical Dimensions:

Minor dimensional variations exist between the main part and substitutes. The Littelfuse parts measure 0.250" diameter × 1.250" length (6.35mm × 31.75mm) compared to the Eaton part's 0.266" diameter × 1.292" length (6.76mm × 32.82mm). Both dimensions are within the 3AB/3AG standard envelope and are compatible with standard 3AB/3AG fuse holders.

Availability:

All substitute parts maintain higher inventory levels (989–1190 pieces) compared to the main part (834 pieces), supporting supply chain continuity.

Frequently Asked Questions (FAQ)

Q: Can the Littelfuse 0314006.HXP, 0314006.MXP, or 0314006.VXP be used as direct replacements for the BK/ABC-6KX?

A: Yes. All three Littelfuse parts are direct electrical and mechanical equivalents. They match the required 6 A current rating, 250 V AC / 125 V DC voltage ratings, fast-blow response time, and 3AB/3AG package format. Physical dimensions are within the standard envelope for 3AB/3AG holders.

Q: What is the difference between the three Littelfuse substitute parts?

A: The 0314006.HXP, 0314006.MXP, and 0314006.VXP are electrically identical. The primary difference is in approval agency certifications: 0314006.HXP and 0314006.MXP include K-MARK certification, while 0314006.VXP includes KC certification. All three are CE, CSA, PSE, and UL certified. Selection should be based on regional regulatory requirements.

Q: Are there compatibility issues with existing 3AB/3AG fuse holders?

A: No. All substitute parts conform to the 3AB/3AG standard package format and are compatible with standard 3AB/3AG fuse holders. Minor dimensional variations (0.250" versus 0.266" diameter) fall within the standard tolerance envelope for this package type.

Q: Does the higher breaking capacity of the Littelfuse parts affect circuit protection performance?

A: No. Breaking capacity specifies the maximum fault current the fuse can safely interrupt without rupturing. Higher breaking capacity (750 A AC for Littelfuse versus 200 A AC for Eaton) provides additional safety margin in high-fault-current circuits while maintaining identical fast-blow response characteristics for normal overcurrent protection at the 6 A rating.

Q: What is the significance of the different melting I²t values?

A: Melting I²t (45 for Littelfuse versus 31.6 for Eaton) indicates the thermal energy required to melt the fuse element. The Littelfuse parts require slightly more thermal energy, resulting in marginally slower response to very brief current transients. Both values are within the fast-blow fuse category and provide equivalent protection for standard circuit protection applications.

Q: Should I select a substitute part based on RoHS compliance?

A: If your application or regional regulations require RoHS compliance, specify one of the Littelfuse substitute parts (0314006.HXP, 0314006.MXP, or 0314006.VXP), which are ROHS3 compliant. The BK/ABC-6KX is RoHS non-compliant and should not be used in RoHS-restricted applications.

Q: Are there any temperature operating range differences?

A: The Littelfuse substitute parts specify an operating temperature range of -55°C to 125°C. The BK/ABC-6KX does not specify an operating temperature range. For applications requiring defined temperature performance specifications, the Littelfuse parts provide explicit thermal operating limits.

Q: Can I mix BK/ABC-6KX and Littelfuse substitute parts in the same circuit or equipment?

A: Yes. All parts are electrically and mechanically equivalent and can be used interchangeably within the same circuit or equipment without performance degradation.