Equivalent & Substitute Parts for BK/HTB-38I

Part Overview

The BK/HTB-38I is a cartridge fuse holder manufactured by Eaton - Electronics Division, designed for 20 A circuits at 250V with panel mount configuration. This component accommodates 0.25" diameter by 1.26" length cartridge fuses (3AG, 1/4" x 1-1/4" SFE-20 standard). The part is classified as obsolete, necessitating identification of active equivalent alternatives to maintain design continuity and ensure supply chain availability for new production and field replacement applications.

Substiute Parts

BK/HTB-38I

Eaton - Electronics DivisionIn Stock: 1186BK/HTB-38I Datasheet

Current PartRFQ

BK/HTB-38I-R

Eaton - Electronics DivisionIn Stock: 1800BK/HTB-38I-R Datasheet

DirectRFQ

03453LS7H

Littelfuse Inc.In Stock: 116703453LS7H Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the BK/HTB-38I is determined by strict equivalence across the following electrical and mechanical parameters:

• Current Rating: 20 A (exact match required)
• Voltage Rating: 250V (exact match required)
• Fuse Size: 0.25" Dia x 1.26" L / 6.35mm x 32mm (exact match required)
• Mounting Configuration: Panel Mount (exact match required)
• Circuit Count: 1 Circuit (exact match required)
• Fuse Type: Cartridge (exact match required)
• Termination Interface: Quick Connect - 0.250" (6.3mm) (exact match required)

All identified substitute parts meet these criteria without deviation. Substitutes are grouped into two categories: direct manufacturer equivalents from Eaton - Electronics Division and cross-manufacturer alternatives from Littelfuse Inc. that satisfy identical electrical and mechanical specifications.

Parameter Comparison

Engineering Selection Recommendations

BK/HTB-38I-R (Eaton - Electronics Division): This part represents the direct manufacturer equivalent to the obsolete BK/HTB-38I. It maintains identical electrical and mechanical specifications while offering active product status and ROHS3 compliance. Selection of this substitute provides continuity with the original equipment manufacturer and eliminates potential compatibility concerns. Higher inventory availability (1703 units) supports procurement reliability.

03453LS7H (Littelfuse Inc.): This cross-manufacturer substitute meets all electrical and mechanical requirements and carries active product status with ROHS3 compliance. The Littelfuse 345 series cartridge fuse holder provides functional equivalence with documented contact material (Copper Alloy) and finish (Tin) specifications. This option is suitable for applications where multi-source qualification is required or where Littelfuse components are already integrated into the supply chain.

Both substitutes are suitable for direct replacement in applications currently using the BK/HTB-38I, with selection based on procurement strategy, supply chain integration, and compliance requirements.

Frequently Asked Questions (FAQ)

Q: Can BK/HTB-38I-R be used as a direct replacement for BK/HTB-38I?

A: Yes. BK/HTB-38I-R is electrically and mechanically identical to BK/HTB-38I across all specified parameters: 20 A current rating, 250V voltage rating, 0.25" x 1.26" fuse size, panel mount configuration, single circuit, cartridge fuse type, and quick connect 0.250" termination. The primary difference is product status (active versus obsolete) and RoHS compliance level.

Q: What are the compatibility requirements for fuse selection with these holders?

A: All three fuse holders (BK/HTB-38I, BK/HTB-38I-R, and 03453LS7H) accept 3AG cartridge fuses with dimensions 0.25" diameter by 1.26" length, also referenced as 1/4" x 1-1/4" (SFE-20) standard. Fuse amperage rating must match the 20 A specification of the holder.

Q: Are there differences in contact material between the Eaton and Littelfuse options?

A: Contact material specifications are not provided for the Eaton parts (BK/HTB-38I and BK/HTB-38I-R). The Littelfuse 03453LS7H specifies Copper Alloy contact material with Tin finish. Both options meet the electrical requirements for 20 A, 250V operation.

Q: What is the significance of RoHS compliance differences?

A: BK/HTB-38I is RoHS non-compliant, while both BK/HTB-38I-R and 03453LS7H are ROHS3 compliant. For applications subject to RoHS regulations or customer requirements, BK/HTB-38I-R or 03453LS7H must be selected. The obsolete status of BK/HTB-38I further supports transition to compliant alternatives.

Q: Can these fuse holders be used interchangeably in existing equipment?

A: Yes, provided the equipment design accommodates panel mount configuration and quick connect 0.250" termination. All three parts share identical mounting type, termination style, and fuse accommodation specifications. Physical panel cutout dimensions and electrical connection points remain consistent across all three options.

Q: What packaging considerations apply to these substitutes?

A: BK/HTB-38I-R and 03453LS7H are supplied in bulk packaging. Packaging specifications for the original BK/HTB-38I are not provided. Bulk packaging is standard for industrial fuse holder components and does not affect functional compatibility.