5HTP 1.25 Ceramic Fuse Equivalent & Substitute Parts

Part Overview

The 5HTP 1.25 is a ceramic cartridge fuse manufactured by Bel Fuse Inc., rated for 1.25 A at 250 V AC/DC with slow-blow response characteristics. This component is classified as obsolete, which necessitates identification of active equivalent parts for ongoing design support and procurement. The 5HTP series maintains consistent electrical and mechanical specifications across active variants, enabling direct substitution based on standardized parameters.

Substiute Parts

5HTP 1.25

Bel Fuse Inc.In Stock: 10045HTP 1.25 Datasheet

Current PartRFQ

5HTP 1.25-R

Bel Fuse Inc.In Stock: 21035HTP 1.25-R Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 5HTP 1.25 is determined by equivalence across the following critical parameters:

• Current Rating: 1.25 A (exact match required)
• Voltage Rating: 250 V AC (exact match required)
• Fuse Type: Cartridge, Ceramic (exact match required)
• Response Time: Slow Blow (exact match required)
• Physical Package: 5mm x 20mm (Axial) (exact match required)
• Breaking Capacity: 1.5 kA (exact match required)
• Melting I²t: 3 (exact match required)

The 5HTP 1.25-R variant meets all substitution criteria as an active product within the same manufacturer series, differing only in product status and packaging configuration.

Parameter Comparison

Engineering Selection Recommendations

The 5HTP 1.25-R is the direct active equivalent for the obsolete 5HTP 1.25. Both parts maintain identical electrical and mechanical specifications, including current rating, voltage rating, response time, package dimensions, and breaking capacity. The primary distinction is product status: the 5HTP 1.25-R is actively manufactured and stocked, while the 5HTP 1.25 is obsolete.

The 5HTP 1.25-R provides improved compliance status, meeting ROHS3 requirements compared to the non-compliant status of the original part. Both variants carry equivalent international certifications (CCC, CE, CSA, cULus, IMQ, PSE, SEMKO, VDE), ensuring regulatory acceptance across markets.

For new designs or component replenishment, the 5HTP 1.25-R is the appropriate selection. For legacy system maintenance where original part specifications must be preserved, the 5HTP 1.25-R provides functional and dimensional equivalence.

Frequently Asked Questions (FAQ)

Q: Can the 5HTP 1.25-R be used as a direct replacement for the 5HTP 1.25?

A: Yes. Both parts are identical in electrical performance, mechanical dimensions, and thermal characteristics. The 5HTP 1.25-R is the active production equivalent.

Q: What is the difference between the 5HTP 1.25 and 5HTP 1.25-R?

A: The primary differences are product status (obsolete vs. active) and RoHS compliance (non-compliant vs. ROHS3 compliant). All functional and dimensional parameters are equivalent.

Q: Are there any packaging differences between these parts?

A: The 5HTP 1.25 is supplied in standard packaging, while the 5HTP 1.25-R is supplied in bulk packaging. Both maintain identical component specifications and physical dimensions (5mm x 20mm axial cartridge).

Q: What certifications apply to the 5HTP 1.25-R?

A: The 5HTP 1.25-R carries full international approvals: CCC, CE, CSA, cULus, IMQ, PSE, SEMKO, and VDE.

Q: Is the 5HTP 1.25-R suitable for applications requiring RoHS compliance?

A: Yes. The 5HTP 1.25-R is ROHS3 compliant, making it suitable for applications with RoHS requirements.