BK/HTB-34I Cartridge Fuse Holder Equivalent & Substitute Parts

Part Overview

The BK/HTB-34I is a cartridge fuse holder manufactured by Eaton - Electronics Division, designed for panel mount applications with a 20 A current rating at 250V. This single-circuit holder accommodates 0.25" diameter by 1.26" length cartridge fuses (6.35mm x 32mm) and features quick connect termination. The product is currently active in production with 795 pieces in stock.

Equivalent and substitute parts are identified when component availability is limited, supply chain disruptions occur, or design revisions require alternative sourcing while maintaining electrical and mechanical compatibility within the specified parameter ranges.

Substiute Parts

BK/HTB-34I

Eaton - Electronics DivisionIn Stock: 819BK/HTB-34I Datasheet

Current PartRFQ

BK/HTB-34I-R

Eaton - Electronics DivisionIn Stock: 1343BK/HTB-34I-R Datasheet

DirectRFQ

BK2-HTJ-608I

Eaton - Electronics DivisionIn Stock: 2509BK2-HTJ-608I Datasheet

SimilarRFQ

03453LS1H

Littelfuse Inc.In Stock: 112103453LS1H Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the BK/HTB-34I are classified based on strict electrical and mechanical parameter alignment:

Direct Equivalent (BK/HTB-34I-R): Identical electrical specifications (20 A, 250V, 1 circuit), identical mechanical form factor (0.25" Dia x 1.26" L cartridge), identical mounting type (panel mount), and identical termination style (quick connect 0.187"). The primary distinction is RoHS compliance status: BK/HTB-34I-R is ROHS3 compliant, whereas the original BK/HTB-34I is RoHS non-compliant. Both are manufactured by Eaton - Electronics Division within the HTB series.

Cross-Manufacturer Equivalent (03453LS1H): Manufactured by Littelfuse Inc., this part maintains identical electrical parameters (20 A, 250V, 1 circuit), identical fuse size (0.25" Dia x 1.26" L), identical mounting type (panel mount), and identical termination style (quick connect 0.187"). This part is ROHS3 compliant and REACH unaffected. The contact material (copper alloy) and finish (tin) differ from the original specification but remain within acceptable parameters for this product category.

Similar Specification Part (BK2-HTJ-608I): This Eaton part operates at reduced current rating (15 A versus 20 A) and features solder lug termination instead of quick connect. The fuse size is 0.250" diameter (6.35mm) without specified length. This part is suitable only when circuit current requirements do not exceed 15 A and solder termination is acceptable in the application.

Parameter Comparison

Engineering Selection Recommendations

For Direct Replacement (Preferred): Select BK/HTB-34I-R when RoHS3 compliance is required or when the original BK/HTB-34I stock is unavailable. This part maintains 100% electrical and mechanical compatibility with identical current rating, voltage, fuse size, mounting configuration, and termination style. Both parts are manufactured by Eaton within the HTB series and are active products.

For Cross-Manufacturer Substitution: Select 03453LS1H (Littelfuse) when Eaton HTB series parts are unavailable and RoHS3 compliance is required. This part delivers identical electrical performance (20 A, 250V) and mechanical form factor. REACH unaffected status confirms compliance with chemical substance regulations. The contact material composition (copper alloy with tin finish) differs from the original but remains suitable for this product category.

For Reduced Current Applications Only: Select BK2-HTJ-608I only when circuit current requirements do not exceed 15 A. This part is not suitable as a direct replacement for 20 A applications due to lower current rating. Solder lug termination requires different PCB or chassis mounting design compared to quick connect termination of the original part.

Frequently Asked Questions (FAQ)

Q: Can BK/HTB-34I-R be used as a direct replacement for BK/HTB-34I?

A: Yes. Both parts are manufactured by Eaton, operate at identical electrical specifications (20 A, 250V, single circuit), accommodate the same fuse size (0.25" Dia x 1.26" L), feature identical panel mount configuration, and use the same quick connect 0.187" termination. The primary difference is RoHS compliance status. BK/HTB-34I-R is ROHS3 compliant.

Q: Is 03453LS1H (Littelfuse) compatible with applications designed for BK/HTB-34I?

A: Yes, for electrical and mechanical compatibility. The 03453LS1H maintains 20 A current rating, 250V voltage rating, 0.25" Dia x 1.26" L fuse size, panel mount configuration, and quick connect 0.187" termination. The manufacturer differs (Littelfuse versus Eaton), and contact material composition differs, but these parameters remain within acceptable ranges for this product category. ROHS3 compliance and REACH unaffected status are confirmed.

Q: Why is BK2-HTJ-608I listed as a substitute if it has only 15 A rating?

A: BK2-HTJ-608I is classified as a similar specification part, not a direct equivalent. It is suitable only for applications where circuit current does not exceed 15 A. The reduced current rating and solder lug termination (versus quick connect) make this part incompatible with designs requiring 20 A capacity or quick connect termination. This part should be selected only when application requirements align with its 15 A specification.

Q: What is the difference between quick connect and solder lug termination?

A: Quick connect termination (0.187" spade connector) allows tool-free insertion into female connectors on PCBs or chassis. Solder lug termination requires soldering the lug directly to a PCB pad or wire. These termination styles are not interchangeable without redesigning the connection interface.

Q: Are all substitute parts currently in stock?

A: Yes. BK/HTB-34I-R has 1320 pieces in stock, 03453LS1H has 1107 pieces in stock, and BK2-HTJ-608I has 2428 pieces in stock. The original BK/HTB-34I has 795 pieces in stock.

Q: What does RoHS3 compliance mean for these fuse holders?

A: ROHS3 compliance indicates the part meets Restriction of Hazardous Substances Directive requirements, restricting the use of specific hazardous materials including lead, cadmium, mercury, and certain flame retardants. BK/HTB-34I-R and 03453LS1H are ROHS3 compliant; the original BK/HTB-34I is RoHS non-compliant.