BK/HTB-52M Cartridge Fuse Holder Equivalent & Substitute Parts

Part Overview

The BK/HTB-52M is a cartridge fuse holder manufactured by Eaton - Electronics Division, designed for 16 A, 250V panel mount applications with 5mm x 20mm fuse compatibility. This component is classified as obsolete, necessitating identification of active equivalent and substitute parts for ongoing procurement and system maintenance. The HTB series holder features quick connect termination and single-circuit configuration suitable for industrial and commercial electrical protection circuits.

Substiute Parts

BK/HTB-52M

Eaton - Electronics DivisionIn Stock: 1210BK/HTB-52M Datasheet

Current PartRFQ

BK/HTB-52M-R

Eaton - Electronics DivisionIn Stock: 1120BK/HTB-52M-R Datasheet

DirectRFQ

03455HS2H

Littelfuse Inc.In Stock: 133603455HS2H Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the BK/HTB-52M is determined by strict alignment of the following critical parameters:

Direct Equivalent Criteria:

• Identical current rating (16 A)
• Identical voltage rating (250V)
• Identical fuse size (5mm x 20mm)
• Identical fuse type (Cartridge)
• Identical mounting type (Panel Mount)
• Identical number of circuits (1)
• Identical termination style (Quick Connect - 0.187")

Similar Substitute Criteria:

• Identical voltage rating (250V)
• Identical fuse size (5mm x 20mm)
• Identical fuse type (Cartridge)
• Identical mounting type (Panel Mount)
• Identical number of circuits (1)
• Identical termination style (Quick Connect - 0.187")
• Variation permitted in current rating only when application requirements allow

The BK/HTB-52M-R qualifies as a direct equivalent. The 03455HS2H qualifies as a similar substitute with a reduced current rating of 10 A, suitable only for applications where the lower current specification meets design requirements.

Parameter Comparison

Engineering Selection Recommendations

BK/HTB-52M-R (Direct Equivalent - Recommended Primary Choice)

The BK/HTB-52M-R is the direct equivalent replacement for the obsolete BK/HTB-52M. Both components are manufactured by Eaton - Electronics Division within the HTB series and maintain identical electrical and mechanical specifications across all critical parameters. The BK/HTB-52M-R holds active product status with 1020 units in stock. The primary distinction is RoHS compliance: the BK/HTB-52M-R is RoHS Compliant, whereas the original part is RoHS non-compliant. For applications subject to RoHS regulations or environmental compliance requirements, the BK/HTB-52M-R is the appropriate selection.

03455HS2H (Similar Substitute - Conditional Use)

The 03455HS2H manufactured by Littelfuse Inc. is a similar substitute suitable only for applications where a 10 A current rating satisfies design requirements. This part maintains identical mechanical compatibility and voltage rating but operates at a reduced current specification. The 03455HS2H is ROHS3 Compliant and carries REACH Unaffected status. Selection of this substitute requires verification that the application circuit does not require the full 16 A capacity of the original part. The 03455HS2H provides 1300 units in stock availability.

Frequently Asked Questions (FAQ)

Q: Can the BK/HTB-52M-R be used as a direct replacement for the BK/HTB-52M?

A: Yes. The BK/HTB-52M-R is a direct equivalent with identical current rating (16 A), voltage rating (250V), fuse size (5mm x 20mm), mounting configuration, and termination style. Both are manufactured by Eaton - Electronics Division. The primary difference is RoHS compliance status.

Q: What is the key limitation of the 03455HS2H as a substitute?

A: The 03455HS2H operates at 10 A current rating compared to the 16 A rating of the BK/HTB-52M. This substitute is suitable only for circuits designed to operate at or below 10 A. The reduced current rating must be verified against application requirements before selection.

Q: Are the mechanical dimensions identical across all three parts?

A: Yes. All three parts accommodate 5mm x 20mm cartridge fuses, feature panel mount configuration, single-circuit design, and quick connect termination at 0.187" (4.7mm). Mechanical interchangeability is confirmed.

Q: What is the difference in RoHS compliance between the parts?

A: The BK/HTB-52M is RoHS non-compliant. The BK/HTB-52M-R is RoHS Compliant. The 03455HS2H is ROHS3 Compliant. Selection depends on regulatory requirements applicable to the end application.

Q: Which part should be selected for new designs?

A: For new designs requiring 16 A capacity, the BK/HTB-52M-R is the appropriate selection as an active product with RoHS compliance. For applications where 10 A capacity is sufficient, the 03455HS2H offers ROHS3 compliance and alternative manufacturer sourcing.

Q: Are there voltage or frequency limitations for these fuse holders?

A: All three parts are rated for 250V operation. No frequency limitations are specified in the provided parameters.