Equivalent & Substitute Parts for BK/HTB-42-R Cartridge Fuse Holder

Part Overview

The BK/HTB-42-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 accommodates 0.25" diameter by 1.26" length (6.35mm x 32mm) cartridge fuses, specifically compatible with 3AG and 1/4" x 1-1/4" fuse types such as the SFE-20. The product is classified as obsolete, making identification of functionally equivalent alternatives necessary for ongoing maintenance, repair, and new design applications where this specific model is no longer available from the original manufacturer.

Substiute Parts

BK/HTB-42-R

Eaton - Electronics DivisionIn Stock: 780BK/HTB-42-R Datasheet

Current PartRFQ

03453LS2HXNP

Littelfuse Inc.In Stock: 113903453LS2HXNP Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the BK/HTB-42-R is determined by strict equivalence across the following critical 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)
• Fuse Type: Cartridge (exact match required)
• Number of Circuits: 1 (exact match required)
• Mounting Configuration: Panel Mount (exact match required)
• Termination Interface: Quick Connect - 0.187" (4.7mm) (exact match required)
• Compatible Fuse Standards: 3AG, 1/4" x 1-1/4" (SFE-20) (exact match required)

The substitute part 03453LS2HXNP from Littelfuse Inc. meets all of these critical parameters without deviation, establishing direct functional equivalence for replacement and design applications.

Parameter Comparison

Engineering Selection Recommendations

The 03453LS2HXNP from Littelfuse Inc. is the direct functional equivalent for the obsolete BK/HTB-42-R. Selection of this substitute is based on:

1. Complete Parameter Equivalence: All electrical and mechanical specifications match without exception, ensuring direct interchangeability in existing circuit designs and panel mount installations.

2. Active Product Status: The 03453LS2HXNP is classified as active, ensuring ongoing availability and supply chain continuity, whereas the BK/HTB-42-R is obsolete and subject to discontinuation.

3. Enhanced Compliance: The substitute part carries ROHS3 compliance and REACH unaffected status, providing additional regulatory alignment for applications requiring modern environmental and safety standards.

4. Inventory Availability: The substitute part is available in higher inventory quantities (1030 Pcs) compared to the original part (724 Pcs), supporting both immediate replacement needs and future procurement.

5. Identical Electrical Performance: Both parts operate at 20 A, 250V with identical fuse accommodation specifications, guaranteeing equivalent circuit protection and performance characteristics.

Frequently Asked Questions (FAQ)

Q: Can the 03453LS2HXNP directly replace the BK/HTB-42-R in existing installations?

A: Yes. The 03453LS2HXNP is a direct functional equivalent. All electrical ratings (20 A, 250V), mechanical dimensions (0.25" Dia x 1.26" L), mounting configuration (panel mount), and termination interface (Quick Connect - 0.187") are identical, enabling direct substitution without circuit modification.

Q: What fuse types are compatible with both the BK/HTB-42-R and 03453LS2HXNP?

A: Both holders accommodate 3AG cartridge fuses and 1/4" x 1-1/4" fuses, specifically including the SFE-20 standard. The 0.25" diameter by 1.26" length specification ensures compatibility with all fuses meeting this dimensional standard.

Q: Why is the BK/HTB-42-R classified as obsolete?

A: The BK/HTB-42-R is an older design from Eaton's product line. Littelfuse's 03453LS2HXNP represents the current generation equivalent, offering the same functionality with modern manufacturing standards and compliance certifications.

Q: Are there any compliance differences between the two parts?

A: The 03453LS2HXNP carries ROHS3 compliance and REACH unaffected status. The BK/HTB-42-R specifications do not include these certifications. For applications requiring environmental compliance, the Littelfuse substitute is the appropriate selection.

Q: What is the termination interface for both parts?

A: Both the BK/HTB-42-R and 03453LS2HXNP use Quick Connect termination with 0.187" (4.7mm) spade connectors, ensuring identical electrical connection compatibility.

Q: Is the 03453LS2HXNP available in different packaging options?

A: The 03453LS2HXNP is supplied in bulk packaging. The BK/HTB-42-R packaging specification is not detailed in the available data. Confirm packaging requirements with your procurement department for order specifications.

Q: What is the moisture sensitivity level for both parts?

A: The BK/HTB-42-R is rated MSL 1 (Unlimited). The 03453LS2HXNP is rated as Not Applicable, indicating no moisture sensitivity restrictions for either part.