Equivalent & Substitute Parts for BK/HTB-24M

Part Overview

The BK/HTB-24M is a cartridge fuse holder manufactured by Eaton - Electronics Division, designed for 16 A at 250V single-circuit panel mount applications with 5mm x 20mm cartridge fuses. This part is classified as obsolete, which necessitates identification of equivalent and substitute components for ongoing procurement and system maintenance. The HTB series holder utilizes quick connect termination at 0.187" (4.7mm) for reliable electrical connection in industrial and commercial panel installations.

Substiute Parts

BK/HTB-24M

Eaton - Electronics DivisionIn Stock: 721BK/HTB-24M Datasheet

Current PartRFQ

BK/HTB-24M-R

Eaton - Electronics DivisionIn Stock: 908BK/HTB-24M-R Datasheet

DirectRFQ

03455LF1H

Littelfuse Inc.In Stock: 245803455LF1H Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the BK/HTB-24M is determined by the following critical parameters:

Direct Equivalency Criteria:

• Fuse size: 5mm x 20mm cartridge format
• Voltage rating: 250V minimum
• Mounting configuration: Panel mount with quick connect termination
• Circuit count: Single circuit (1)

Substitute Classification:

Direct Equivalent (Identical Electrical and Mechanical Specifications): The BK/HTB-24M-R maintains all electrical and mechanical parameters of the main part, including 16 A current rating, 250V voltage, 5mm x 20mm fuse accommodation, and quick connect 0.187" termination. This part qualifies as a direct replacement with no functional or installation differences.

Similar Substitute (Reduced Current Rating): The 03455LF1H from Littelfuse Inc. shares the same fuse size (5mm x 20mm), voltage rating (250V), mounting type (panel mount), circuit count (1), and termination style (quick connect 0.187"). However, this part is rated for 10 A current capacity, which is lower than the 16 A rating of the main part. This substitution is valid only in applications where the actual circuit current requirement does not exceed 10 A.

Parameter Comparison

Engineering Selection Recommendations

For Direct Replacement (Preferred): The BK/HTB-24M-R is the recommended substitute for the obsolete BK/HTB-24M. Both parts are manufactured by Eaton - Electronics Division within the HTB series and maintain identical electrical and mechanical specifications. The BK/HTB-24M-R is classified as active product status with ROHS3 compliance, addressing regulatory requirements that the original part does not meet. Installation requires no modification to existing panel mount configurations or electrical connections.

For Current-Limited Applications: The 03455LF1H from Littelfuse Inc. is suitable only in applications where the circuit current requirement is confirmed to be 10 A or less. This part provides an alternative source with higher inventory availability (2360 Pcs) and ROHS3 compliance. The 10 A current rating represents a functional limitation compared to the 16 A capacity of the main part and must be verified against actual circuit requirements before selection.

Compliance Considerations: Both substitute parts are ROHS3 compliant, whereas the original BK/HTB-24M is RoHS non-compliant. For new installations or systems subject to RoHS regulations, either substitute part satisfies compliance requirements. The BK/HTB-24M-R maintains manufacturer continuity with Eaton, while the 03455LF1H introduces a secondary manufacturer source.

Frequently Asked Questions (FAQ)

Q: Can the BK/HTB-24M-R be used as a direct replacement for BK/HTB-24M without any modifications?

A: Yes. The BK/HTB-24M-R is electrically and mechanically identical to the BK/HTB-24M. Both parts accommodate 5mm x 20mm cartridge fuses, operate at 250V, handle 16 A current, and use identical quick connect 0.187" termination. No panel modifications or rewiring is required.

Q: What is the primary difference between BK/HTB-24M-R and 03455LF1H?

A: The BK/HTB-24M-R maintains the 16 A current rating of the original part. The 03455LF1H is rated for 10 A current capacity. Both parts share the same fuse size, voltage rating, mounting type, and termination style. The current rating difference determines suitability based on actual circuit requirements.

Q: Can 03455LF1H be used in a 16 A circuit?

A: No. The 03455LF1H is rated for maximum 10 A current. Using this part in a circuit requiring 16 A protection would result in inadequate overcurrent protection and potential safety hazards. This substitution is valid only when circuit current does not exceed 10 A.

Q: Are there packaging differences between the substitute parts?

A: The BK/HTB-24M-R is supplied in bulk packaging. The 03455LF1H is also supplied in bulk packaging. Both parts are available in new original condition with no functional packaging differences affecting installation or performance.

Q: Which substitute part should be selected for new system designs?

A: For new designs requiring 16 A protection at 250V with 5mm x 20mm cartridge fuses, the BK/HTB-24M-R is the appropriate selection. It maintains the original electrical specifications, provides active product status, and ensures manufacturer continuity with Eaton - Electronics Division. ROHS3 compliance also satisfies modern regulatory requirements.

Q: Does the contact material or finish affect substitution compatibility?

A: The BK/HTB-24M and BK/HTB-24M-R do not specify contact material or finish in the provided parameters. The 03455LF1H specifies copper alloy contacts with tin finish. For applications where contact material specifications are critical, the BK/HTB-24M-R maintains consistency with the original part specifications.