BK/HTB-36-R Fuse Holder Equivalent & Substitute Parts

Part Overview

The BK/HTB-36-R is a cartridge fuse holder manufactured by Eaton - Electronics Division, designed for panel mount applications with a 20 A current rating at 250V. This component is classified as obsolete, making identification of functionally equivalent alternatives necessary for ongoing maintenance, repair, and new design applications where the original part is no longer available through standard distribution channels.

The HTB series fuse holder accommodates 3AG cartridge fuses with dimensions of 0.25" diameter by 1.26" length (6.35mm x 32mm). The quick connect termination style (0.250" / 6.3mm) enables straightforward integration into panel-mounted electrical systems.

Substiute Parts

BK/HTB-36-R

Eaton - Electronics DivisionIn Stock: 1232BK/HTB-36-R Datasheet

Current PartRFQ

03450101H

Littelfuse Inc.In Stock: 737803450101H Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the BK/HTB-36-R is determined by the following critical parameters:

Mechanical Compatibility:

• Fuse size must be identical: 0.25" diameter x 1.26" length (6.35mm x 32mm)
• Fuse type must be cartridge format
• Compatible fuse standard: 3AG, 1/4" x 1-1/4" (SFE-20)

Electrical Compatibility:

• Current rating must be equal to or greater than 20 A
• Voltage rating must be equal to or greater than 250V
• Single circuit configuration

Physical Interface:

• Termination style must accommodate quick connect or equivalent connection method
• Mounting configuration must support panel mount or equivalent installation

The substitute part 03450101H from Littelfuse Inc. shares identical mechanical specifications (fuse size, fuse type, and compatible fuse standard) and maintains single-circuit cartridge holder functionality. Electrical parameters exceed the original specification, providing enhanced voltage capability (600V vs. 250V) and are rated for 15 A operation.

Parameter Comparison

Engineering Selection Recommendations

Mechanical Substitution Feasibility: The 03450101H maintains identical fuse size and cartridge format specifications, ensuring mechanical compatibility with 3AG fuses. Both holders accommodate the same 0.25" x 1.26" cartridge dimensions.

Electrical Substitution Feasibility: The 03450101H provides electrical ratings that exceed the original BK/HTB-36-R specification. The 600V rating accommodates applications originally rated at 250V. The 15 A current rating is lower than the original 20 A specification; applications requiring the full 20 A capacity must evaluate whether 15 A operation is acceptable for the intended circuit protection function.

Installation Considerations: The BK/HTB-36-R is panel mount with quick connect termination. The 03450101H is through-hole mounted with PC pin termination. These mounting differences require mechanical redesign or adapter solutions for direct substitution in existing panel mount installations.

Compliance Status: The 03450101H is active product status with ROHS3 compliance certification, supporting long-term availability and regulatory alignment. The BK/HTB-36-R is obsolete, making the 03450101H a viable long-term alternative for new designs and ongoing production.

Frequently Asked Questions (FAQ)

Q: Can the 03450101H directly replace the BK/HTB-36-R in existing panel mount applications?

A: Mechanical fuse compatibility is confirmed (identical 0.25" x 1.26" cartridge size). However, mounting type differs: BK/HTB-36-R is panel mount with quick connect termination, while 03450101H is through-hole with PC pin termination. Physical installation modification is required.

Q: Is the 15 A rating of the 03450101H sufficient for circuits originally protected by the 20 A BK/HTB-36-R?

A: Current rating reduction from 20 A to 15 A changes circuit protection characteristics. Applications must verify that 15 A protection is appropriate for the protected circuit. This is not a transparent substitution for all applications.

Q: What fuse types are compatible with both holders?

A: Both holders accommodate 3AG cartridge fuses with 0.25" diameter and 1.26" length (SFE-20 standard). Fuse selection remains consistent between the two holders.

Q: Does the 03450101H meet current regulatory requirements?

A: The 03450101H is ROHS3 compliant and carries active product status, confirming current regulatory alignment and ongoing manufacturer support.

Q: Are there packaging or inventory considerations for the 03450101H?

A: The 03450101H is supplied in bulk packaging with 7,350 pieces in stock, supporting both prototype and production volume requirements.