BK/HHJ-A Fuse Holder Cartridge 20A 250V Equivalent & Substitute Parts

Part Overview

The BK/HHJ-A is a cartridge fuse holder manufactured by Eaton - Electronics Division, designed for 20 A circuits with a 250V rating in free-hanging (in-line) configuration. This component is classified as Active product status and is currently in stock with 731 pieces available. Substitute parts are identified when equivalent electrical and mechanical specifications are required, particularly when voltage rating flexibility, compliance certifications, or alternative manufacturer sourcing becomes necessary for procurement, inventory management, or design requirements.

Substiute Parts

BK/HHJ-A

Eaton - Electronics DivisionIn Stock: 806BK/HHJ-A Datasheet

Current PartRFQ

BK/HHJ-A-R

Eaton - Electronics DivisionIn Stock: 4512BK/HHJ-A-R Datasheet

DirectRFQ

01550020ZXU

Littelfuse Inc.In Stock: 198401550020ZXU Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the BK/HHJ-A are identified based on strict equivalence across the following parameters: current rating (20 A), fuse size (0.25" Dia x 1.26" L), fuse type (Cartridge), mounting type (Free Hanging In-Line), number of circuits (1), termination style (Crimp), and compatibility with 3AG/SFE-20 fuse standards. Voltage rating variations are permitted within the substitution logic when the substitute part maintains or exceeds the electrical performance envelope. The BK/HHJ-A operates at 250V; substitute parts operating at 32V are functionally compatible in applications where the lower voltage rating is acceptable. All substitute parts maintain identical mechanical form factors and circuit configurations.

Parameter Comparison

Engineering Selection Recommendations

BK/HHJ-A-R (Eaton - Electronics Division): This substitute part is manufactured by the same original equipment manufacturer as the main part. It maintains identical mechanical and electrical specifications with the exception of voltage rating (32V versus 250V). The BK/HHJ-A-R carries ROHS3 compliance certification and REACH Unaffected status, providing regulatory advantages over the non-compliant main part. Inventory availability is significantly higher at 4423 pieces. Selection of this part is appropriate for applications where 32V voltage rating is acceptable and RoHS3 compliance is required or preferred.

01550020ZXU (Littelfuse Inc.): This substitute part is manufactured by Littelfuse Inc., Series 155. It maintains identical mechanical specifications and 20 A current rating with 32V voltage rating. Contact material is specified as Brass with Tin finish. The part carries ROHS3 compliance and REACH Unaffected status. Inventory availability is 1900 pieces. Selection of this part is appropriate for applications requiring alternative manufacturer sourcing, where 32V voltage rating is acceptable, and where RoHS3 compliance is required.

Frequently Asked Questions (FAQ)

Q: Can the BK/HHJ-A-R substitute for the BK/HHJ-A in all applications?

A: The BK/HHJ-A-R is mechanically and electrically equivalent with one exception: voltage rating is 32V versus 250V. Substitution is valid only in applications where the circuit operates at or below 32V. The 20 A current rating, fuse size, mounting configuration, and termination style are identical.

Q: What is the primary difference between BK/HHJ-A and BK/HHJ-A-R?

A: The primary differences are voltage rating (250V versus 32V) and regulatory compliance. The BK/HHJ-A-R is ROHS3 compliant and REACH Unaffected, while the main part is RoHS non-compliant. All other electrical and mechanical parameters are equivalent.

Q: Is the 01550020ZXU from Littelfuse mechanically compatible with the BK/HHJ-A?

A: Yes. The 01550020ZXU maintains identical fuse size (0.25" Dia x 1.26" L), mounting type (Free Hanging In-Line), current rating (20 A), and termination style (Crimp). It is compatible with 3AG/SFE-20 fuse standards. The voltage rating is 32V.

Q: What does the voltage rating difference mean for substitution?

A: Voltage rating indicates the maximum voltage the component can safely operate at. A 32V-rated component can be used in circuits operating at 32V or lower. A 250V-rated component can be used in circuits operating at 250V or lower. Substituting a 250V part with a 32V part requires confirmation that circuit voltage does not exceed 32V.

Q: Are all substitute parts available in bulk packaging?

A: The BK/HHJ-A-R and 01550020ZXU are both available in Bulk packaging. The main part BK/HHJ-A packaging specification is not provided.

Q: Which substitute part offers the best regulatory compliance?

A: Both substitute parts (BK/HHJ-A-R and 01550020ZXU) carry ROHS3 compliance and REACH Unaffected status. The main part BK/HHJ-A is RoHS non-compliant. For applications requiring RoHS3 compliance, either substitute part is appropriate.

Q: What is the inventory advantage of selecting a substitute part?

A: The BK/HHJ-A-R offers 4423 pieces in stock versus 731 pieces for the main part, representing a 505% inventory increase. The 01550020ZXU offers 1900 pieces, representing a 160% inventory increase. Higher inventory availability reduces lead time risk.