BK/HHB Cartridge Fuse Holder 30A 32V Equivalent & Substitute Parts

Part Overview

The BK/HHB is a cartridge fuse holder manufactured by Eaton - Electronics Division, rated for 30 amperes at 32 volts with single-circuit configuration. This free-hanging in-line holder accommodates 0.25" diameter cartridge fuses with lengths ranging from 0.875" to 1.26" (6.35mm x 22.23mm to 32mm). The BK/HHB series is classified as obsolete product status. Identifying equivalent and substitute parts is necessary to maintain circuit protection functionality in applications where original inventory is depleted or long-term availability requires transition to active production alternatives.

Substiute Parts

BK/HHB

Eaton - Electronics DivisionIn Stock: 846BK/HHB Datasheet

Current PartRFQ

BK/HHB-R

Eaton - Electronics DivisionIn Stock: 3265BK/HHB-R Datasheet

DirectRFQ

01550100Z

Littelfuse Inc.In Stock: 314701550100Z Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the BK/HHB cartridge fuse holder is determined by the following critical parameters: current rating (30 A), voltage rating (32 V), fuse size accommodation (0.25" diameter, 0.875" to 1.26" length), single-circuit configuration, free-hanging in-line mounting type, and cartridge fuse type.

Direct Equivalent (BK/HHB-R): This part maintains identical electrical specifications (30 A, 32 V), mechanical dimensions, and fuse compatibility. The primary distinction is product status transition from obsolete to active, with improved RoHS3 compliance and increased inventory availability.

Similar Substitute (01550100Z): This Littelfuse part shares the same voltage rating (32 V), fuse size envelope (0.25" diameter), single-circuit configuration, and free-hanging in-line mounting. However, the current rating is reduced to 20 A, and fuse length accommodation differs (0.625" to 1.26" versus 0.875" to 1.26"). Termination style differs (wire leads versus crimp), and contact materials vary (brass with nickel finish versus copper with tin finish).

Parameter Comparison

Engineering Selection Recommendations

For Direct Replacement: The BK/HHB-R is the primary substitute for the obsolete BK/HHB. Both parts maintain identical electrical ratings (30 A, 32 V), mechanical envelope, and fuse compatibility. The BK/HHB-R offers the advantage of active product status with ROHS3 compliance and significantly higher inventory availability (3176 pieces versus 773 pieces). Selection of BK/HHB-R eliminates obsolescence risk and aligns with current regulatory compliance requirements.

For Current-Reduced Applications: The 01550100Z from Littelfuse may be considered only in applications where the circuit protection requirement is 20 amperes or less. This part shares the 32-volt rating and free-hanging in-line mounting configuration. The reduced current rating, different fuse length accommodation range, wire lead termination, and brass contact material with nickel finish represent material deviations from the original specification. This substitute is suitable only when circuit design permits the lower current rating and termination style change.

Frequently Asked Questions (FAQ)

Q: Can BK/HHB-R be used as a direct replacement for BK/HHB?

A: Yes. The BK/HHB-R maintains identical electrical specifications (30 A, 32 V), fuse size accommodation (0.25" diameter, 0.875" to 1.26" length), mounting configuration (free-hanging in-line), and termination style (crimp). The primary differences are product status (active versus obsolete) and improved RoHS3 compliance.

Q: What are the limitations of using 01550100Z as a substitute?

A: The 01550100Z has a reduced current rating of 20 amperes compared to the 30-ampere rating of BK/HHB. Additionally, the fuse length accommodation begins at 0.625" rather than 0.875", termination is wire leads instead of crimp, and contact materials differ (brass with nickel finish versus copper with tin finish). This part is suitable only for applications rated at 20 amperes or lower.

Q: Are there compatibility concerns with different termination styles?

A: Yes. The BK/HHB and BK/HHB-R use crimp termination, while the 01550100Z uses wire leads. Circuit board layouts, connector designs, and wiring harnesses must accommodate the specific termination style. Termination style changes require verification of mechanical fit and electrical connection integrity in the target application.

Q: How do contact material differences affect performance?

A: Contact material and finish affect electrical conductivity, corrosion resistance, and contact resistance. The BK/HHB and BK/HHB-R use copper with tin finish, while the 01550100Z uses brass with nickel finish. These material combinations have different electrical and environmental performance characteristics. Selection should align with the original circuit design specifications.

Q: What is the significance of RoHS compliance status?

A: The BK/HHB is RoHS non-compliant, while BK/HHB-R and 01550100Z are ROHS3 compliant. RoHS3 compliance indicates restriction of hazardous substances in electrical and electronic equipment. For applications subject to RoHS regulations or customer requirements, ROHS3-compliant alternatives are necessary.

Q: Does packaging type affect part selection?

A: Packaging type (dash, box, or bulk) affects inventory management, handling, and storage but does not alter electrical or mechanical functionality. Selection should consider procurement volume, storage requirements, and supply chain logistics.