5HTP 8 Ceramic Fuse - Equivalent & Substitute Parts

Part Overview

The 5HTP 8 is an 8 A, 250 V AC ceramic cartridge fuse manufactured by Bel Fuse Inc. in a 5mm x 20mm axial through-hole package with slow-blow response characteristics. This part is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and component procurement. Substitute parts must maintain identical electrical ratings and mechanical compatibility to ensure proper circuit protection without redesign.

Substiute Parts

5HTP 8

Bel Fuse Inc.In Stock: 8145HTP 8 Datasheet

Current PartRFQ

5HTP 8-R

Bel Fuse Inc.In Stock: 21225HTP 8-R Datasheet

DirectRFQ

0001.2513.PT

SCHURTER Inc.In Stock: 10980001.2513.PT Datasheet

DirectRFQ

0215008.MXEP

Littelfuse Inc.In Stock: 161270215008.MXEP Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility is determined by strict equivalence across the following critical parameters:

• Current Rating: 8 A (exact match required)
• Voltage Rating (AC): 250 V (exact match required)
• Package / Case: 5mm x 20mm (Axial) (exact match required)
• Fuse Type: Cartridge, Ceramic (exact match required)
• Response Time: Slow Blow (exact match required)
• Mounting Type: Through Hole (exact match required)

All substitute parts listed below meet these criteria. Variations in secondary parameters such as melting I²t, breaking capacity at rated voltage, and dimensional tolerances are acceptable within industry standards for ceramic fuse cartridges.

Parameter Comparison

Engineering Selection Recommendations

5HTP 8-R (Bel Fuse Inc.) is the primary direct substitute. It maintains identical electrical and mechanical specifications to the obsolete 5HTP 8 while offering active product status and ROHS3 compliance. Inventory availability is substantial at 2105 pieces.

0001.2513.PT (SCHURTER Inc.) is a functionally equivalent alternative with active status and ROHS3 compliance. The DC voltage rating of 150 V provides additional capability for DC applications. Breaking capacity is rated at 1 kA AC and 1.5 kA DC. Dimensional variation is minimal (5.40mm diameter vs. 5.50mm, 22.50mm length vs. 21.00mm). This part is suitable for applications requiring DC circuit protection.

0215008.MXEP (Littelfuse Inc.) is a functionally equivalent alternative with the broadest regulatory approval coverage (CE, CSA, KC, PSE, SEMKO, UL, VDE) and highest inventory availability at 16100 pieces. Melting I²t is lower at 209.88 compared to 330 for the main part, indicating faster thermal response. Dimensional variation is minimal (5.80mm diameter vs. 5.50mm, 22.50mm length vs. 21.00mm). This part is suitable for applications where regulatory compliance across multiple markets is required.

All substitute parts are RoHS3 compliant, addressing environmental compliance requirements absent in the obsolete main part.

Frequently Asked Questions (FAQ)

Q: Can 5HTP 8-R be used as a direct replacement for 5HTP 8?

A: Yes. The 5HTP 8-R maintains identical current rating (8 A), AC voltage rating (250 V), fuse type (ceramic cartridge), package (5mm x 20mm axial), response time (slow blow), and operating temperature range (-55°C ~ 125°C). It is the direct equivalent from the same manufacturer.

Q: What is the difference between 0001.2513.PT and the main part?

A: The 0001.2513.PT is manufactured by SCHURTER Inc. and adds a DC voltage rating of 150 V. Breaking capacity is specified as 1 kA AC and 1.5 kA DC. Physical dimensions vary slightly (5.40mm diameter, 22.50mm length vs. 5.50mm diameter, 21.00mm length for the main part). Melting I²t is 268 compared to 330. These differences are within acceptable tolerances for ceramic fuse cartridges in the 5mm x 20mm package class.

Q: Why does 0215008.MXEP have a lower melting I²t value?

A: Melting I²t is a thermal characteristic that reflects the energy required to melt the fuse element. The 0215008.MXEP value of 209.88 compared to 330 for the main part indicates a faster thermal response. This is a design variation within the same current and voltage rating class and does not affect compatibility for standard circuit protection applications.

Q: Are all substitute parts RoHS compliant?

A: Yes. The 5HTP 8-R, 0001.2513.PT, and 0215008.MXEP are all ROHS3 compliant. The original 5HTP 8 is RoHS non-compliant, making substitution necessary for applications requiring environmental compliance.

Q: Which substitute part has the best regulatory approval coverage?

A: The 0215008.MXEP (Littelfuse Inc.) carries the broadest approval agency certifications: CE, CSA, KC, PSE, SEMKO, UL, and VDE. This makes it suitable for applications requiring compliance across multiple international markets.

Q: Can these parts be used interchangeably in the same circuit board layout?

A: Yes. All substitute parts use the same 5mm x 20mm axial through-hole package and mounting type. Physical dimension variations are minimal and fall within standard PCB footprint tolerances for this package class.