BK/ABC-12NR Ceramic Cartridge Fuse 12A 250VAC 125VDC Equivalent & Substitute Parts

Part Overview

The BK/ABC-12NR is a ceramic cartridge fuse manufactured by Eaton - Electronics Division, rated for 12 amperes at 250 volts AC and 125 volts DC. This fast-blow fuse is designed for use in 3AB, 3AG holder configurations with dimensions of 0.250" diameter by 1.250" length (6.35mm x 31.75mm). The part maintains active product status and is RoHS compliant. Equivalent and substitute parts are identified based on matching electrical ratings, mechanical package specifications, response time characteristics, and approval agency certifications. Alternative sources and series variants are documented to support procurement flexibility and supply chain continuity.

Substiute Parts

BK/ABC-12NR

Eaton - Electronics DivisionIn Stock: 1085BK/ABC-12NR 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 eligibility for the BK/ABC-12NR is determined by strict equivalence across the following critical parameters:

Primary Substitution Criteria:

• Current Rating: 12 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)
• Size / Dimension: 0.250" Dia x 1.250" L (exact match required)
• Mounting Type: Requires Holder (exact match required)

Secondary Compliance Criteria:

• Approval Agency certifications (CSA, UL, or equivalent recognized standards)
• RoHS compliance status
• Product Status: Active

All substitute parts listed below meet these criteria. Variations in breaking capacity, melting I²t, DC cold resistance, and operating temperature ranges are noted but do not disqualify substitution when primary electrical and mechanical parameters are identical.

Parameter Comparison

Engineering Selection Recommendations

Eaton ABC Series (Same Manufacturer): ABC-12-R, BK/ABC-12-R, and BK/ABC-12NR are functionally equivalent within the Eaton ABC product line. All three maintain identical electrical ratings, mechanical dimensions, and fast-blow response characteristics. BK/ABC-12-R offers the highest inventory availability (2271 units) among Eaton variants. ABC-12-R and BK/ABC-12-R carry ROHS3 compliance certification, representing current RoHS standards.

Eaton GBB Series (Same Manufacturer, Alternative Series): BK/GBB-12-R and GBB-12-R are Eaton GBB series alternatives meeting all primary substitution criteria. These parts carry CSA and UR certifications. DC cold resistance is lower (0.0062 Ω versus 0.0068 Ω for ABC series), and breaking capacity specifications differ. GBB-12-R specifies 200 A AC breaking capacity, while BK/GBB-12-R specifies 10 kA AC breaking capacity.

Littelfuse 314 Series (Alternative Manufacturer): 0314012.HXP, 0314012.MXANP, 0314012.MXP, and 0314012.VXP are Littelfuse 314 series ceramic cartridge fuses meeting all primary electrical and mechanical specifications. These parts carry expanded approval agency certifications including CE, CSA, K-MARK, and UL. Operating temperature range is specified as -55°C to 125°C. DC cold resistance is 0.0076 Ω. 0314012.MXP offers the highest inventory availability among Littelfuse variants (5908 units).

Selection Basis:

• All listed parts are active products with current manufacturing status
• All parts meet or exceed the approval agency requirements of the original BK/ABC-12NR
• All parts are RoHS compliant
• Substitution is based solely on matching electrical ratings, mechanical package specifications, response time, and holder compatibility

Frequently Asked Questions (FAQ)

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

A: Yes. ABC-12-R and BK/ABC-12-R are direct parametric equivalents to BK/ABC-12NR. All three parts share identical current ratings (12 A), voltage ratings (250 V AC, 125 V DC), fuse type (ceramic cartridge), response time (fast blow), package designation (3AB, 3AG), and physical dimensions (0.250" Dia x 1.250" L). The primary difference is RoHS certification version. BK/ABC-12-R has the highest inventory availability among Eaton ABC variants.

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

A: Yes. Littelfuse 0314012.HXP, 0314012.MXANP, 0314012.MXP, and 0314012.VXP are mechanically and electrically compatible with 3AB and 3AG holder configurations. All parts maintain the identical 0.250" diameter by 1.250" length specification. Littelfuse parts carry expanded international certifications (CE, K-MARK) in addition to CSA and UL.

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

A: ABC and GBB series fuses are both Eaton ceramic cartridge fuses with identical electrical ratings and mechanical dimensions. The primary differences are in breaking capacity specifications and DC cold resistance. ABC series specifies 750 A AC breaking capacity with 0.0068 Ω DC cold resistance. GBB series specifies either 10 kA or 200 A AC breaking capacity with 0.0062 Ω DC cold resistance. Both series are approved by CSA and carry UL or UR certifications.

Q: Can I use a Littelfuse fuse in place of an Eaton fuse?

A: Yes. Littelfuse 314 series fuses (0314012.HXP, 0314012.MXANP, 0314012.MXP, 0314012.VXP) are parametric equivalents meeting all primary electrical and mechanical requirements. Littelfuse parts carry CSA and UL certifications matching or exceeding Eaton certifications. Operating temperature range for Littelfuse parts is -55°C to 125°C. DC cold resistance is 0.0076 Ω, which is within acceptable tolerance for ceramic cartridge fuses of this rating.

Q: What does "Fast Blow" response time mean?

A: Fast Blow indicates the fuse will open quickly when current exceeds the rated 12 A threshold. All substitute parts listed maintain fast-blow response characteristics, ensuring consistent circuit protection behavior across all equivalent options.

Q: Are all substitute parts RoHS compliant?

A: Yes. All substitute parts listed carry RoHS3 compliance certification or equivalent RoHS compliance status. The original BK/ABC-12NR is RoHS compliant. This ensures environmental and regulatory compliance across all equivalent options.

Q: What holder types are compatible with these fuses?

A: These fuses require a holder designed for 3AB or 3AG cartridge fuses with 0.250" diameter and 1.250" length specifications. The fuse does not mount directly to a circuit board or panel; a separate holder assembly is required.

Q: Does inventory availability affect substitution eligibility?

A: No. Inventory levels do not determine substitution eligibility. All listed parts meet identical electrical and mechanical specifications. Inventory quantities are provided for procurement planning purposes only. BK/ABC-12-R (2271 units) and 0314012.MXP (5908 units) offer the highest availability among Eaton and Littelfuse options respectively.