BK1/ABC-8-R Equivalent & Substitute Parts

Part Overview

The BK1/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, requiring identification of active equivalent alternatives for continued system support and procurement. The fuse operates with fast-blow response characteristics and requires a compatible holder (3AB, 3AG format). Substitute parts must maintain identical electrical ratings, mechanical dimensions, and breaking capacity specifications to ensure direct functional replacement without circuit redesign.

Substiute Parts

BK1/ABC-8-R

Eaton - Electronics DivisionIn Stock: 1152BK1/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

Substitution eligibility for the BK1/ABC-8-R is determined by strict equivalence across the following critical parameters:

Primary Equivalence Criteria:

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

Secondary Compatibility Parameters:

• Breaking Capacity @ Rated Voltage: 200A AC minimum, 10kA DC minimum
• DC Cold Resistance: tolerance range 0.0136 to 0.153 Ohms
• Melting I²t: tolerance range 105 to 116.5
• Approval Agencies: CSA, UL, or equivalent certifications (CE, K-MARK, PSE, UR)
• RoHS Status: ROHS3 Compliant (required)

All identified substitutes meet or exceed these criteria and are classified as active products, eliminating obsolescence risk.

Parameter Comparison

Engineering Selection Recommendations

Tier 1 - Direct Eaton Equivalents (Recommended for Eaton-specified designs):

ABC-8-R and BK/ABC-8-R are active Eaton products with identical electrical and mechanical specifications to the obsolete BK1/ABC-8-R. Both maintain the same current rating, voltage ratings, breaking capacity, and DC cold resistance. These parts carry CSA and UL certifications matching the original specification. Selection between ABC-8-R and BK/ABC-8-R depends on packaging availability and inventory status.

Tier 2 - Eaton GBB Series (Alternative Eaton platform):

GBB-8-R and BK/GBB-8-R are active Eaton alternatives within the GBB series. Both meet all primary equivalence criteria with identical current, voltage, and package specifications. The GBB series carries CSA and UR certifications. DC cold resistance values (0.0136 Ohms) are within acceptable tolerance. BK/GBB-8-R specifies 10kA AC breaking capacity versus the original 200A AC; GBB-8-R specifies 200A AC matching the original. GBB-8-R is preferred when AC breaking capacity equivalence is required.

Tier 3 - Littelfuse 314 Series (Cross-manufacturer alternative):

0314008.HXP, 0314008.MXP, and 0314008.VXP are active Littelfuse products meeting all primary equivalence criteria. All three maintain 8 A current rating, 250 V AC / 125 V DC voltage ratings, and 3AB/3AG package compatibility. Littelfuse parts provide enhanced breaking capacity (750A AC, 10kA DC) and broader approval agency coverage (CE, CSA, K-MARK, PSE, UL certifications). Operating temperature range (-55°C to 125°C) extends beyond the original specification. DC cold resistance values range from 0.0153 to 0.153 Ohms, within acceptable tolerance. Selection among the three Littelfuse variants depends on specific approval requirements and resistance specifications for the application.

Frequently Asked Questions (FAQ)

Q: Can BK1/ABC-8-R be directly replaced with ABC-8-R or BK/ABC-8-R?

A: Yes. ABC-8-R and BK/ABC-8-R are parametric equivalents with identical current rating (8 A), voltage ratings (250 V AC / 125 V DC), package dimensions (3AB, 3AG, 1/4" x 1-1/4"), and breaking capacity (200A AC, 10kA DC). Both are active products with CSA and UL certifications. The primary difference is product status: BK1/ABC-8-R is obsolete while ABC-8-R and BK/ABC-8-R are active.

Q: What is the difference between Eaton ABC and GBB series fuses?

A: Both ABC and GBB series meet the 8 A, 250 V AC / 125 V DC specification and 3AB/3AG package requirements. The GBB series carries UR certification in addition to CSA. GBB-8-R maintains 200A AC breaking capacity matching the original. BK/GBB-8-R specifies 10kA AC breaking capacity. DC cold resistance in the GBB series (0.0136 Ohms) is slightly lower than the original ABC series (0.014 Ohms), remaining within acceptable tolerance.

Q: Are Littelfuse 314 series fuses compatible with Eaton-specified applications?

A: Littelfuse 0314008.HXP, 0314008.MXP, and 0314008.VXP meet all primary equivalence criteria: 8 A current rating, 250 V AC / 125 V DC voltage ratings, 3AB/3AG package compatibility, and fast-blow response. All three carry CSA and UL certifications required for North American applications. Littelfuse parts provide higher breaking capacity (750A AC versus 200A AC) and extended operating temperature range (-55°C to 125°C). These characteristics make Littelfuse parts suitable for direct substitution in applications where the original Eaton part was specified.

Q: What is the significance of DC cold resistance differences among substitutes?

A: DC cold resistance values range from 0.0136 Ohms (GBB series) to 0.153 Ohms (0314008.VXP). All values remain within acceptable tolerance for 8 A cartridge fuses. DC cold resistance affects voltage drop during normal operation. Lower resistance values (0.0136 to 0.0153 Ohms) produce minimal voltage drop. The 0314008.VXP variant with 0.153 Ohms resistance remains acceptable but should be evaluated if the application has strict voltage drop requirements.

Q: Which substitute part offers the broadest approval coverage?

A: Littelfuse 0314008.HXP and 0314008.MXP carry the most comprehensive certifications: CE, CSA, K-MARK, PSE, and UL. These parts are suitable for applications requiring international compliance. Eaton ABC and GBB series parts carry CSA and UL certifications, meeting North American requirements. Selection depends on geographic application scope and specific regulatory requirements.

Q: Can 0314008.VXP be used interchangeably with 0314008.HXP and 0314008.MXP?

A: 0314008.VXP is parametrically equivalent to 0314008.HXP and 0314008.MXP for current rating, voltage ratings, package, and breaking capacity. The primary difference is DC cold resistance: 0314008.VXP specifies 0.153 Ohms versus 0.0153 Ohms for the other variants. This tenfold difference in resistance may affect voltage drop characteristics. Interchangeability depends on application voltage drop tolerance. Both variants carry equivalent certifications (CE, CSA, PSE, UL) with 0314008.VXP adding KC certification.

Q: What holder compatibility should be verified when substituting fuses?

A: All substitute parts maintain the 3AB, 3AG, 1/4" x 1-1/4" (6.35mm x 31.75mm) package specification. This ensures mechanical compatibility with existing 3AB and 3AG fuse holders. No holder modification or replacement is required when substituting among the listed parts. Verify that the installed holder accepts the 3AB/3AG package format before component selection.