Equivalent & Substitute Parts for BK/HTB-58I Cartridge Fuse Holder

Part Overview

The BK/HTB-58I is a cartridge fuse holder manufactured by Eaton - Electronics Division, designed for 20 A, 250V panel mount applications with single circuit configuration. This component accommodates 3AG cartridge fuses measuring 0.25" diameter by 1.26" length (6.35mm x 32mm). The BK/HTB-58I is classified as obsolete, necessitating identification of equivalent substitute components for ongoing procurement and system maintenance. Substitute parts must maintain identical electrical ratings, mechanical dimensions, and termination specifications to ensure direct functional replacement without circuit redesign.

Substiute Parts

BK/HTB-58I

Eaton - Electronics DivisionIn Stock: 1152BK/HTB-58I Datasheet

Current PartRFQ

BK/HTB-58I-R

Eaton - Electronics DivisionIn Stock: 1004BK/HTB-58I-R Datasheet

DirectRFQ

03453HS7H

Littelfuse Inc.In Stock: 175403453HS7H Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the BK/HTB-58I are qualified based on strict equivalence across the following parameters:

Electrical Compatibility:

• Current rating: 20 A (exact match required)
• Voltage rating: 250V (exact match required)
• Number of circuits: 1 (exact match required)

Mechanical Compatibility:

• Fuse size: 0.25" Dia x 1.26" L / 6.35mm x 32mm (exact match required)
• Mounting type: Panel Mount (exact match required)
• Termination style: Quick Connect - 0.250" (6.3mm) (exact match required)
• Compatible fuse standard: 3AG, 1/4" x 1-1/4" (SFE-20) (exact match required)

Functional Classification:

• Fuse holder type: Cartridge (exact match required)

All identified substitute parts meet these criteria and are therefore electrically and mechanically interchangeable with the BK/HTB-58I.

Parameter Comparison

Engineering Selection Recommendations

BK/HTB-58I-R (Direct Substitute - Eaton): This part is the primary substitute for the obsolete BK/HTB-58I. Both components are manufactured by Eaton - Electronics Division and share identical electrical and mechanical specifications. The BK/HTB-58I-R maintains active product status and achieves ROHS3 compliance, addressing regulatory requirements that the original part does not meet. This substitute is recommended for direct replacement in new procurement and system redesigns where RoHS compliance is required.

03453HS7H (Similar Substitute - Littelfuse): This Littelfuse component provides functional equivalence across all critical electrical and mechanical parameters. The 03453HS7H is manufactured by an alternative supplier and achieves ROHS3 compliance. Contact material is specified as Copper Alloy with Tin finish, providing documented material composition. This substitute is suitable for applications where cross-manufacturer sourcing is acceptable and inventory availability is a consideration. The part carries active product status and REACH Unaffected designation.

Both substitute parts are electrically and mechanically interchangeable with the BK/HTB-58I and support equivalent circuit performance in 20 A, 250V single-circuit cartridge fuse holder applications.

Frequently Asked Questions (FAQ)

Q: Can BK/HTB-58I-R be used as a direct replacement for BK/HTB-58I?

A: Yes. Both parts are manufactured by Eaton - Electronics Division and share identical current rating (20 A), voltage rating (250V), fuse size (0.25" Dia x 1.26" L), mounting type (Panel Mount), and termination style (Quick Connect - 0.250"). The BK/HTB-58I-R is the active production equivalent of the obsolete BK/HTB-58I.

Q: What is the difference between BK/HTB-58I-R and 03453HS7H?

A: Both parts meet identical electrical and mechanical specifications for 20 A, 250V cartridge fuse holder applications. The primary differences are manufacturer (Eaton vs. Littelfuse) and packaging (Bag vs. Bulk). Contact material composition is documented for the 03453HS7H (Copper Alloy with Tin finish) but not specified for the BK/HTB-58I-R. Both achieve ROHS3 compliance and active product status.

Q: Are these fuse holders compatible with 3AG cartridge fuses?

A: Yes. All three parts (BK/HTB-58I, BK/HTB-58I-R, and 03453HS7H) are designed for use with 3AG cartridge fuses measuring 1/4" x 1-1/4" (SFE-20 standard), which corresponds to the specified fuse size of 0.25" Dia x 1.26" L (6.35mm x 32mm).

Q: Does the packaging type affect electrical or mechanical performance?

A: No. Packaging type (Bag for BK/HTB-58I-R, Bulk for 03453HS7H) is a logistics and procurement consideration only and does not affect component functionality, electrical ratings, or mechanical compatibility.

Q: What is the significance of RoHS compliance for these parts?

A: The BK/HTB-58I is RoHS non-compliant, while both BK/HTB-58I-R and 03453HS7H are ROHS3 compliant. For applications subject to RoHS regulatory requirements, either substitute part is required. For legacy systems without RoHS mandates, the original BK/HTB-58I remains functionally equivalent.

Q: Can 03453HS7H be used in applications originally designed for BK/HTB-58I?

A: Yes. The 03453HS7H meets all electrical and mechanical requirements for direct substitution. The component is manufactured by Littelfuse Inc. rather than Eaton, but functional equivalence is maintained across current rating, voltage rating, fuse size, mounting configuration, and termination style.