Equivalent & Substitute Parts for ABC-3/4-R Ceramic Fuse Cartridge

Part Overview

The ABC-3/4-R is a 750 mA 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 full CSA and UL approval certifications. Substitute parts are identified when equivalent electrical and mechanical parameters align with the original specification, ensuring direct compatibility in existing circuit protection designs.

Substiute Parts

ABC-3/4-R

Eaton - Electronics DivisionIn Stock: 946ABC-3/4-R Datasheet

Current PartRFQ

BK/ABC-3/4-R

Eaton - Electronics DivisionIn Stock: 1340BK/ABC-3/4-R Datasheet

DirectRFQ

0314.750HXP

Littelfuse Inc.In Stock: 9840314.750HXP Datasheet

Parametric EquivalentRFQ

0314.750MXP

Littelfuse Inc.In Stock: 26360314.750MXP Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the ABC-3/4-R are classified based on strict electrical and mechanical parameter alignment:

Direct Manufacturer Equivalent: BK/ABC-3/4-R maintains identical specifications across all critical parameters including current rating, voltage ratings, breaking capacity, physical dimensions, and approval certifications. This variant represents the same product line with alternative part numbering.

Parametric Equivalents: 0314.750HXP and 0314.750MXP (Littelfuse Inc., Series 314) satisfy substitution criteria through matching electrical performance parameters: 750 mA current rating, 250 V AC / 125 V DC voltage ratings, fast-blow response, identical physical dimensions, and compatible holder requirements. Both parts maintain CSA and UL certifications with extended operating temperature range (-55°C ~ 125°C) and ROHS3 compliance.

Substitution is valid when the following parameters are identical:

• Current Rating (Amps): 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"
• Size / Dimension: 0.250" Dia x 1.250" L (6.35mm x 31.75mm)
• Breaking Capacity @ Rated Voltage: 35A AC, 10kA DC

Parameter Comparison

Engineering Selection Recommendations

All identified substitute parts maintain Active product status and satisfy the core electrical and mechanical requirements for direct substitution in 750 mA, 250 V AC / 125 V DC circuit protection applications.

BK/ABC-3/4-R (Eaton - Electronics Division): This direct manufacturer equivalent provides identical electrical performance and physical specifications. Selection is appropriate when maintaining single-source procurement from Eaton is required or when inventory availability of the ABC-3/4-R variant is limited.

0314.750HXP and 0314.750MXP (Littelfuse Inc., Series 314): Both Littelfuse variants satisfy substitution criteria through matching electrical ratings and physical dimensions. These parts provide extended operating temperature range (-55°C ~ 125°C) compared to the original specification and include CE certification in addition to CSA and UL approvals. The Littelfuse parts exhibit lower DC cold resistance (0.25 Ohms versus 0.3 Ohms) and higher melting I²t values (0.466 versus 0.145), which remain within acceptable parameters for the specified 750 mA fast-blow application. Selection of Littelfuse variants is appropriate when multi-source qualification is required or when extended temperature performance is beneficial to system design.

All substitute parts are ROHS3 compliant and maintain compatibility with 3AB and 3AG fuse holders requiring 1/4" x 1-1/4" cartridge format.

Frequently Asked Questions (FAQ)

Q: Can 0314.750HXP and 0314.750MXP be used interchangeably with ABC-3/4-R?

A: Yes. Both Littelfuse parts satisfy substitution criteria through identical current rating (750 mA), voltage ratings (250 V AC / 125 V DC), fuse type (cartridge ceramic), response time (fast blow), physical dimensions (0.250" Dia x 1.250" L), and breaking capacity (35A AC, 10kA DC). All parts are approved by CSA and UL and are ROHS3 compliant.

Q: What is the difference between 0314.750HXP and 0314.750MXP?

A: Both parts are parametrically equivalent with identical electrical ratings and physical specifications. The part numbers reflect different manufacturing or packaging variants within the Littelfuse Series 314 product line. Selection between these variants is determined by inventory availability and procurement requirements rather than electrical performance differences.

Q: Are there differences in melting I²t values between the main part and substitutes?

A: The ABC-3/4-R and BK/ABC-3/4-R specify melting I²t of 0.145, while 0314.750HXP and 0314.750MXP specify 0.466. Both values are valid for 750 mA fast-blow ceramic cartridge fuses and reflect different thermal characteristics within the fast-blow classification. The higher I²t value in Littelfuse parts indicates slightly different thermal response but maintains fast-blow operation appropriate for the specified 750 mA rating.

Q: Do all substitute parts fit the same fuse holder?

A: Yes. All parts conform to 3AB and 3AG holder format with identical physical dimensions of 0.250" Dia x 1.250" L (6.35mm x 31.75mm). Direct mechanical compatibility is confirmed across all substitute options.

Q: What certifications apply to each part?

A: ABC-3/4-R and BK/ABC-3/4-R carry CSA and UL certifications. Littelfuse parts (0314.750HXP and 0314.750MXP) carry CE, CSA, and UL certifications, providing additional European compliance documentation.

Q: Is BK/ABC-3/4-R a direct replacement for ABC-3/4-R?

A: Yes. BK/ABC-3/4-R is a direct manufacturer equivalent with identical electrical specifications, physical dimensions, breaking capacity, and approval certifications. This variant represents alternative part numbering within the Eaton ABC series.