Eaton BK/ABC-20RX Ceramic Cartridge Fuse – Equivalent & Substitute Parts

Part Overview

The Eaton BK/ABC-20RX is a 20 A ceramic cartridge fuse rated for 250 V AC and 125 V DC operation. This fast-blow fuse is designed for use in 3AB, 3AG holder configurations with dimensions of 0.250" diameter by 1.250" length (6.35 mm × 31.75 mm). The part is currently active in production and maintains a stock inventory of 921 pieces. Equivalent and substitute parts are identified based on matching electrical ratings, mechanical package specifications, and functional performance characteristics. Alternative part numbers are necessary for supply chain flexibility, regional availability, and design standardization across manufacturing facilities.

Substiute Parts

BK/ABC-20RX

Eaton - Electronics DivisionIn Stock: 1013BK/ABC-20RX Datasheet

Current PartRFQ

ABC-20-R

Eaton - Electronics DivisionIn Stock: 987ABC-20-R Datasheet

Parametric EquivalentRFQ

BK/ABC-20-R

Eaton - Electronics DivisionIn Stock: 1731BK/ABC-20-R Datasheet

Parametric EquivalentRFQ

BK/GBB-20-R

Eaton - Electronics DivisionIn Stock: 1525BK/GBB-20-R Datasheet

Parametric EquivalentRFQ

0314020.HXP

Littelfuse Inc.In Stock: 15940314020.HXP Datasheet

Parametric EquivalentRFQ

0314020.MXP

Littelfuse Inc.In Stock: 81230314020.MXP Datasheet

Parametric EquivalentRFQ

0314020.VXP

Littelfuse Inc.In Stock: 11170314020.VXP Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the BK/ABC-20RX ceramic cartridge fuse is determined by the following mandatory parameters:

Primary Substitution Criteria:

• Current Rating: 20 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" × 1-1/4" (exact match required)
• Size / Dimension: 0.250" Dia × 1.250" L (exact match required)
• Mounting Type: Requires Holder (exact match required)

All substitute parts listed below satisfy these primary criteria. Secondary parameters such as breaking capacity, melting I²t, DC cold resistance, and approval agencies may vary within acceptable engineering tolerances for the application category. Substitute parts are sourced from Eaton – Electronics Division and Littelfuse Inc., both established manufacturers of ceramic cartridge fuses.

Parameter Comparison

Engineering Selection Recommendations

All substitute parts listed are active production items from established manufacturers. Selection among equivalent parts is based on the following factors:

Eaton – Electronics Division Parts (ABC-20-R, BK/ABC-20-R, BK/GBB-20-R): These parts maintain direct compatibility with the original BK/ABC-20RX specification. The ABC-20-R and BK/ABC-20-R variants offer identical electrical characteristics and are recommended for direct replacement in existing designs. Both parts carry CSA and UL approvals. The BK/GBB-20-R variant is also CSA and UR approved and operates within the same electrical parameters, though with a lower AC breaking capacity of 200 A compared to 400 A in the primary ABC series.

Littelfuse Inc. Parts (0314020.HXP, 0314020.MXP, 0314020.VXP): These ceramic cartridge fuses from the 314 series provide functional equivalence with extended operating temperature range (-55°C to 125°C) and broader approval agency coverage (CE, CSA, PSE, UL, and KC for the VXP variant). All three Littelfuse variants carry ROHS3 compliance and REACH unaffected status. The 0314020.MXP variant maintains the highest inventory availability at 8,100 pieces. Breaking capacity specifications vary: 0314020.HXP and 0314020.MXP are rated at 200 A AC, while 0314020.VXP is rated at 1 kA AC. All three maintain 10 kA DC breaking capacity.

Selection should prioritize parts with active product status and appropriate approval certifications for the target application region and end-use environment.

Frequently Asked Questions (FAQ)

Q: Can I substitute the BK/ABC-20RX with any of the listed equivalent parts?

A: Yes. All listed parts meet the mandatory substitution criteria: 20 A current rating, 250 V AC / 125 V DC voltage ratings, ceramic cartridge fuse type, fast-blow response, and 3AB/3AG package configuration with 0.250" × 1.250" dimensions. Physical and electrical compatibility is confirmed across all substitute options.

Q: What is the difference between the Eaton ABC-20-R and BK/ABC-20-R?

A: Both parts are manufactured by Eaton – Electronics Division and share identical electrical specifications, current ratings, voltage ratings, and physical dimensions. The primary difference is the part number designation. Both are active production items suitable for direct substitution.

Q: Why do the Littelfuse parts have different breaking capacities?

A: Breaking capacity is a secondary parameter that does not affect the primary substitution criteria. The 0314020.HXP and 0314020.MXP variants are rated at 200 A AC breaking capacity, while the 0314020.VXP is rated at 1 kA AC. All three maintain 10 kA DC breaking capacity. Selection should be based on the specific breaking capacity requirement of the application circuit.

Q: Are the Littelfuse parts RoHS compliant?

A: Yes. All three Littelfuse variants (0314020.HXP, 0314020.MXP, 0314020.VXP) are ROHS3 compliant and REACH unaffected.

Q: What is the operating temperature range for each part?

A: The Eaton parts (BK/ABC-20RX, ABC-20-R, BK/ABC-20-R, BK/GBB-20-R) do not specify an operating temperature range in the provided data. The Littelfuse parts (0314020.HXP, 0314020.MXP, 0314020.VXP) operate across -55°C to 125°C.

Q: Which part has the highest inventory availability?

A: The Littelfuse 0314020.MXP variant maintains the highest inventory at 8,100 pieces in stock. The BK/ABC-20-R (Eaton) has 1,666 pieces available.

Q: Do all parts require the same holder configuration?

A: Yes. All parts are designed for use with 3AB and 3AG holder configurations and share identical physical dimensions of 0.250" diameter by 1.250" length (6.35 mm × 31.75 mm). No holder modifications are required when substituting between listed parts.

Q: What approval agencies certify these fuses?

A: The Eaton BK/ABC-20RX carries CSA and UR approvals. The Eaton ABC-20-R and BK/ABC-20-R carry CSA and UL approvals. The Littelfuse variants carry CE, CSA, PSE, and UL approvals, with the 0314020.VXP additionally certified by KC.