HTB-28M Cartridge Fuse Holder - Equivalent & Substitute Parts

Part Overview

The HTB-28M is a cartridge fuse holder manufactured by Eaton - Electronics Division, designed for 20 A, 250V single-circuit panel mount applications. This component accommodates 5mm x 20mm cartridge fuses with quick connect termination (0.250" / 6.3mm). The HTB-28M maintains active product status with 777 units in current inventory stock.

Substitute parts are identified when equivalent mechanical and electrical specifications align with the main part's functional requirements, enabling direct replacement in circuit protection applications where the same voltage, fuse size, mounting configuration, and termination style are required.

Substiute Parts

HTB-28M

Eaton - Electronics DivisionIn Stock: 854HTB-28M Datasheet

Current PartRFQ

03455LF7H

Littelfuse Inc.In Stock: 147403455LF7H Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the HTB-28M is determined by strict alignment of the following parameters:

• Voltage Rating: Must be 250V
• Fuse Size: Must be 0.197" Dia x 0.787" L (5mm x 20mm)
• Fuse Type: Must be Cartridge
• Number of Circuits: Must be 1
• Mounting Type: Must be Panel Mount
• Termination Style: Must be Quick Connect - 0.250" (6.3mm)

The substitute part 03455LF7H (Littelfuse Inc.) shares these core mechanical and electrical specifications. However, the current rating differs: the HTB-28M is rated for 20 A, while the 03455LF7H is rated for 10 A. This difference reflects distinct circuit protection applications and must be evaluated against specific load requirements.

Parameter Comparison

Engineering Selection Recommendations

HTB-28M Selection: Choose the HTB-28M for 20 A circuit protection applications. This part maintains active product status and is available in substantial inventory. The HTB-28M is RoHS non-compliant; applications requiring RoHS compliance must select alternative components.

03455LF7H Selection: The Littelfuse 03455LF7H is suitable for 10 A circuit protection applications requiring identical mechanical and electrical specifications. This part is ROHS3 compliant and REACH unaffected, meeting environmental regulatory requirements. The 03455LF7H is available in higher inventory quantity (1435 units).

Current Rating Consideration: The 10 A rating of the 03455LF7H differs from the 20 A rating of the HTB-28M. Selection between these parts must align with the actual circuit protection requirement. The fuse holder accommodates 5mm x 20mm cartridge fuses; the fuse element itself determines the final circuit protection characteristic.

Frequently Asked Questions (FAQ)

Q: Can the 03455LF7H replace the HTB-28M in all applications?

A: The 03455LF7H shares identical mechanical specifications (fuse size, mounting type, termination style, voltage rating, and circuit count) with the HTB-28M. However, the current rating differs (10 A vs. 20 A). Substitution is valid only when the circuit protection requirement is 10 A. The fuse holder itself does not limit current; the installed cartridge fuse element determines protection level.

Q: What is the significance of the different current ratings?

A: The current rating indicates the maximum current the fuse holder is designed to interrupt safely. The HTB-28M is rated for 20 A interruption capacity, while the 03455LF7H is rated for 10 A. These ratings reflect the mechanical and electrical design of each holder. Selection must match the intended circuit protection level.

Q: Are there compatibility issues with the Quick Connect termination?

A: Both parts use identical Quick Connect - 0.250" (6.3mm) termination. No compatibility issues exist for termination interface.

Q: What is the impact of RoHS compliance status?

A: The HTB-28M is RoHS non-compliant; the 03455LF7H is ROHS3 compliant. Applications subject to RoHS directives must use the 03455LF7H or equivalent compliant alternatives. The HTB-28M is suitable for applications without RoHS requirements.

Q: Are both parts suitable for 250V applications?

A: Yes. Both the HTB-28M and 03455LF7H are rated for 250V operation.

Q: What fuse types are compatible with these holders?

A: Both holders accommodate 5mm x 20mm cartridge fuses. Specific fuse selection (current rating, breaking capacity, response time) must be determined independently based on circuit requirements.