BK/ABC-V-3/4 Equivalent & Substitute Parts

Part Overview

The BK/ABC-V-3/4 is a 750 mA ceramic cartridge fuse rated for 250 V AC and 125 V DC operation. Manufactured by Eaton - Electronics Division, this through-hole component features fast-blow response characteristics and is approved by CSA and UL agencies. The part is classified as obsolete, making identification of active equivalent and substitute parts essential for ongoing system maintenance and new design implementations.

Substiute Parts

BK/ABC-V-3/4

Eaton - Electronics DivisionIn Stock: 1151BK/ABC-V-3/4 Datasheet

Current PartRFQ

BK/ABC-V-3/4-R

Eaton - Electronics DivisionIn Stock: 700BK/ABC-V-3/4-R Datasheet

DirectRFQ

ABC-V-3/4-R

Eaton - Electronics DivisionIn Stock: 993ABC-V-3/4-R Datasheet

Parametric EquivalentRFQ

0324.750HXP

Littelfuse Inc.In Stock: 8650324.750HXP Datasheet

DirectRFQ

0324.750MXP

Littelfuse Inc.In Stock: 10410324.750MXP Datasheet

DirectRFQ

0324.750VXP

Littelfuse Inc.In Stock: 8750324.750VXP Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the BK/ABC-V-3/4 is determined by strict equivalence across the following critical parameters:

Mandatory Matching Parameters:

• Current Rating: 750 mA
• 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" (Axial)
• Mounting Type: Through Hole
• Breaking Capacity @ Rated Voltage: 35A AC, 10kA DC

All identified substitute parts meet these mandatory parameters. Variations in secondary characteristics such as melting I²t, DC cold resistance, operating temperature range, and RoHS compliance status do not disqualify substitution but are documented for engineering reference.

Parameter Comparison

Engineering Selection Recommendations

Primary Recommendation - Direct Manufacturer Equivalent:

BK/ABC-V-3/4-R (Eaton - Electronics Division) is the direct active equivalent to the obsolete BK/ABC-V-3/4. Both parts are manufactured by Eaton and share identical electrical and mechanical specifications. The -R designation indicates the active production variant. This part maintains CSA and UL approvals and is currently in active product status with 644 units in stock.

Secondary Recommendation - Parametric Equivalent:

ABC-V-3/4-R (Eaton - Electronics Division) provides parametric equivalence with identical electrical ratings and mechanical dimensions. This variant is in active production status with 939 units available. Selection between BK/ABC-V-3/4-R and ABC-V-3/4-R depends on specific circuit board design requirements and part number conventions used in legacy documentation.

Cross-Manufacturer Alternatives:

The Littelfuse 324 series fuses (0324.750HXP, 0324.750MXP, 0324.750VXP) provide full parametric substitution with identical current, voltage, and breaking capacity ratings. These parts are in active production status and carry expanded approval certifications including CE marking. All three Littelfuse variants are available in bulk packaging with inventory levels exceeding 800 units each.

Compliance Considerations:

The original BK/ABC-V-3/4 is RoHS non-compliant. All active substitute parts (Eaton -R variants and Littelfuse 324 series) are ROHS3 compliant, supporting modern procurement and environmental compliance requirements.

Frequently Asked Questions (FAQ)

Q: Can BK/ABC-V-3/4-R be used as a direct replacement for BK/ABC-V-3/4?

A: Yes. BK/ABC-V-3/4-R is the active production equivalent manufactured by Eaton. All electrical ratings (750 mA, 250 V AC, 125 V DC), mechanical dimensions (1/4" x 1-1/4"), and approval certifications (CSA, UL) are identical. The -R designation indicates the current active variant of the same product line.

Q: What is the difference between BK/ABC-V-3/4-R and ABC-V-3/4-R?

A: Both parts are manufactured by Eaton and share identical electrical and mechanical specifications. The difference is in the part number prefix. BK/ABC-V-3/4-R includes the "BK/" prefix, while ABC-V-3/4-R does not. Selection depends on the part number convention specified in your circuit design documentation or procurement system.

Q: Are Littelfuse 0324.750HXP, 0324.750MXP, and 0324.750VXP interchangeable?

A: Yes. All three Littelfuse variants meet the mandatory substitution parameters: 750 mA current rating, 250 V AC / 125 V DC voltage ratings, fast-blow response, 3AB/3AG package, and 35A AC / 10kA DC breaking capacity. Selection among these three variants may depend on specific application requirements or supplier availability.

Q: Does the operating temperature range affect substitution suitability?

A: The original BK/ABC-V-3/4 does not specify an operating temperature range. Littelfuse 324 series parts specify -55°C to 125°C operation. This expanded temperature specification does not disqualify substitution but provides additional environmental capability for applications requiring extended temperature performance.

Q: What is the significance of the melting I²t and DC cold resistance variations?

A: Melting I²t and DC cold resistance are secondary electrical characteristics that vary among the substitute parts but do not affect substitution eligibility. The BK/ABC-V-3/4 specifies 0.8 melting I²t and 0.303 Ohms DC cold resistance. Active substitutes show variations (0.145 to 0.466 melting I²t; 0.25 to 0.3 Ohms DC cold resistance). These variations remain within acceptable ranges for the 750 mA, 250 V AC / 125 V DC fuse category and do not compromise circuit protection function.

Q: Should RoHS compliance status influence part selection?

A: The original BK/ABC-V-3/4 is RoHS non-compliant. All active substitute parts are ROHS3 compliant. For new designs or systems subject to environmental regulations, ROHS3-compliant variants (BK/ABC-V-3/4-R, ABC-V-3/4-R, and all Littelfuse 324 series) are required. For legacy system maintenance where the original non-compliant part is still in use, compliance status may not be a selection factor.

Q: Are there any approval certification differences between Eaton and Littelfuse variants?

A: Eaton variants (BK/ABC-V-3/4-R and ABC-V-3/4-R) carry CSA and UL approvals. Littelfuse 324 series parts carry CE, CSA, and UL approvals. The additional CE marking on Littelfuse parts supports European market applications. All variants meet the CSA and UL requirements of the original BK/ABC-V-3/4.