BK/ABC-B-12 Equivalent & Substitute Parts

Part Overview

The BK/ABC-B-12 is a 12 A ceramic cartridge fuse rated for 250 V AC and 125 V DC operation. This fast-blow fuse cartridge requires a compatible holder and is designed for general-purpose circuit protection applications. The part is currently active in production with 1105 units in stock. Equivalent and substitute parts are identified based on matching electrical ratings, mechanical dimensions, and functional performance characteristics to ensure direct interchangeability in circuit protection applications.

Substiute Parts

BK/ABC-B-12

Eaton - Electronics DivisionIn Stock: 1147BK/ABC-B-12 Datasheet

Current PartRFQ

ABC-12-R

Eaton - Electronics DivisionIn Stock: 1000ABC-12-R Datasheet

Parametric EquivalentRFQ

BK/ABC-12-R

Eaton - Electronics DivisionIn Stock: 2289BK/ABC-12-R Datasheet

Parametric EquivalentRFQ

BK/GBB-12-R

Eaton - Electronics DivisionIn Stock: 1246BK/GBB-12-R Datasheet

Parametric EquivalentRFQ

GBB-12-R

Eaton - Electronics DivisionIn Stock: 975GBB-12-R Datasheet

Parametric EquivalentRFQ

0314012.HXP

Littelfuse Inc.In Stock: 15710314012.HXP Datasheet

Parametric EquivalentRFQ

0314012.MXANP

Littelfuse Inc.In Stock: 14840314012.MXANP Datasheet

Parametric EquivalentRFQ

0314012.MXP

Littelfuse Inc.In Stock: 59560314012.MXP Datasheet

Parametric EquivalentRFQ

0314012.VXP

Littelfuse Inc.In Stock: 7540314012.VXP Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the BK/ABC-B-12 ceramic cartridge fuse is determined by the following critical parameters:

Electrical Equivalence Requirements:

• Current Rating: 12 A (exact match required)
• Voltage Rating - AC: 250 V (exact match required)
• Voltage Rating - DC: 125 V (exact match required)
• Response Time: Fast Blow (exact match required)

Mechanical Compatibility Requirements:

• Fuse Type: Cartridge, Ceramic
• Package / Case: 3AB, 3AG, 1/4" x 1-1/4"
• Size / Dimension: 0.250" Dia x 1.250" L (6.35mm x 31.75mm)
• Mounting Type: Requires Holder

All substitute parts listed maintain these core parameters. Secondary parameters such as melting I²t, DC cold resistance, breaking capacity, and approval agencies may vary within acceptable ranges for the product category while preserving functional interchangeability.

Parameter Comparison

Engineering Selection Recommendations

Eaton ABC Series (BK/ABC-B-12, ABC-12-R, BK/ABC-12-R): These parts are manufactured by Eaton - Electronics Division and maintain identical electrical and mechanical specifications. The ABC-12-R and BK/ABC-12-R variants offer ROHS3 compliance, whereas the original BK/ABC-B-12 is non-compliant. All three carry CSA and UL approvals. Selection between these variants depends on regulatory compliance requirements for the end application.

Eaton GBB Series (BK/GBB-12-R, GBB-12-R): These parts are from the GBB series and provide equivalent electrical performance with slightly lower DC cold resistance (0.0062 Ω versus 0.0068 Ω). Both are ROHS3 compliant and carry CSA and UR approvals. The GBB-12-R has a lower AC breaking capacity (200A) compared to the ABC variants (750A), while DC breaking capacity remains at 10kA.

Littelfuse 314 Series (0314012.HXP, 0314012.MXANP, 0314012.MXP, 0314012.VXP): These Littelfuse parts provide cross-manufacturer equivalence with identical electrical ratings and mechanical dimensions. All variants are ROHS3 compliant and carry CE, CSA, K-MARK, and UL approvals. Operating temperature range is specified as -55°C to 125°C. DC cold resistance is 0.0076 Ω. These parts are suitable for applications requiring multi-source qualification or where Littelfuse supply chain is preferred.

Frequently Asked Questions (FAQ)

Q: Can BK/ABC-B-12 be directly replaced with ABC-12-R or BK/ABC-12-R?

A: Yes. All three parts share identical electrical ratings (12 A, 250 V AC, 125 V DC), response time (Fast Blow), and mechanical dimensions (0.250" Dia x 1.250" L). The primary difference is RoHS compliance status. ABC-12-R and BK/ABC-12-R are ROHS3 compliant, while BK/ABC-B-12 is non-compliant. Both variants fit the same 3AB/3AG holder.

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

A: Both series meet the same electrical and dimensional requirements for 12 A, 250 V AC, 125 V DC operation. The GBB series has a lower DC cold resistance (0.0062 Ω versus 0.0068 Ω in ABC). The GBB-12-R has a lower AC breaking capacity (200A) compared to ABC variants (750A), though DC breaking capacity is identical at 10kA. Selection depends on specific circuit protection requirements.

Q: Are Littelfuse 314 series fuses compatible with Eaton ABC holders?

A: Yes. Littelfuse 0314012.HXP, 0314012.MXANP, 0314012.MXP, and 0314012.VXP all share the same 3AB/3AG package and 0.250" Dia x 1.250" L dimensions as the Eaton parts. They are mechanically and electrically interchangeable in the same holder assembly.

Q: What approval agencies are relevant for each manufacturer?

A: Eaton ABC and GBB series carry CSA and UL approvals (GBB also includes UR). Littelfuse 314 series carries CE, CSA, K-MARK, and UL approvals. Selection should be based on the specific regulatory requirements of the target market and application.

Q: Does operating temperature range affect substitution?

A: The Littelfuse 314 series specifies an operating temperature range of -55°C to 125°C. Eaton parts do not specify an operating temperature range in the provided data. For applications with extreme temperature requirements, the Littelfuse parts provide documented thermal performance limits.

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

A: DC cold resistance values range from 0.0062 Ω (GBB series) to 0.0076 Ω (Littelfuse 314 series), with the original BK/ABC-B-12 at 0.0068 Ω. These minor variations are within acceptable tolerances for ceramic cartridge fuses and do not affect functional interchangeability in standard circuit protection applications.

Q: Can I use these fuses interchangeably in the same circuit?

A: Yes, provided the holder is compatible with the 3AB/3AG package standard. All listed parts maintain identical current ratings (12 A), voltage ratings (250 V AC, 125 V DC), response time (Fast Blow), and physical dimensions (0.250" Dia x 1.250" L). Electrical performance is equivalent across all variants.