Equivalent & Substitute Parts for 5HTP 4 Ceramic Fuse

Part Overview

The 5HTP 4 is a 4 A, 250 V AC ceramic cartridge fuse manufactured by Bel Fuse Inc., designed for through-hole mounting in 5mm x 20mm form factor applications. This component is classified as obsolete, making identification of active equivalent parts essential for ongoing design support, maintenance, and procurement continuity. Substitute parts must maintain identical electrical ratings and mechanical compatibility to ensure proper circuit protection without redesign.

Substiute Parts

5HTP 4

Bel Fuse Inc.In Stock: 11685HTP 4 Datasheet

Current PartRFQ

5HTP 4-R

Bel Fuse Inc.In Stock: 27705HTP 4-R Datasheet

DirectRFQ

0001.2510.PT

SCHURTER Inc.In Stock: 15600001.2510.PT Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 5HTP 4 is determined by strict equivalence across the following critical parameters:

• Current Rating: 4 A (exact match required)
• Voltage Rating (AC): 250 V (exact match required)
• Fuse Type: Cartridge, Ceramic (exact match required)
• Package / Case: 5mm x 20mm (Axial) (exact match required)
• Mounting Type: Through Hole (exact match required)
• Response Time: Slow Blow (exact match required)
• Breaking Capacity: 1.5 kA (exact match required)
• Operating Temperature Range: -55°C to 125°C (exact match required)

Two substitute parts meet these criteria: 5HTP 4-R (Bel Fuse Inc., active status) and 0001.2510.PT (SCHURTER Inc., active status). Both maintain full electrical and mechanical compatibility with the original 5HTP 4 specification.

Parameter Comparison

Engineering Selection Recommendations

Both substitute parts are functionally equivalent to the 5HTP 4 across all critical electrical and mechanical parameters. Selection between them should be based on the following factors:

5HTP 4-R (Bel Fuse Inc.): This part maintains identical specifications to the original 5HTP 4, including current rating, voltage rating, breaking capacity, and melting I²t value of 56. It carries active product status and ROHS3 compliance. The same manufacturer origin provides design continuity. Approval certifications include CCC, CE, CSA, cULus, IMQ, PSE, SEMKO, and VDE.

0001.2510.PT (SCHURTER Inc.): This part meets all core electrical and mechanical requirements with identical current, AC voltage, and breaking capacity ratings. It includes an additional DC voltage rating of 150 V, which may provide enhanced capability in applications requiring DC circuit protection. ROHS3 compliance is confirmed. Approval certification is cURus. The melting I²t value is 62.4, slightly higher than the original specification.

For applications requiring strict adherence to original specifications and certification scope, 5HTP 4-R is the direct equivalent. For applications benefiting from extended DC voltage capability, 0001.2510.PT is suitable provided the higher melting I²t value does not conflict with circuit protection requirements.

Frequently Asked Questions (FAQ)

Q: Can 5HTP 4-R be used as a direct replacement for 5HTP 4?

A: Yes. The 5HTP 4-R maintains identical electrical ratings (4 A, 250 V AC), fuse type (ceramic cartridge), response time (slow blow), package dimensions (5mm x 20mm), and breaking capacity (1.5 kA). It is manufactured by the same company and carries the same approval certifications.

Q: What is the difference between 5HTP 4-R and 0001.2510.PT?

A: Both parts meet the core electrical and mechanical requirements of the 5HTP 4. The 0001.2510.PT adds a 150 V DC rating and has a melting I²t of 62.4 compared to 56 for the 5HTP 4-R. The 0001.2510.PT is manufactured by SCHURTER Inc. and carries cURus certification, while the 5HTP 4-R carries broader certification coverage (CCC, CE, CSA, cULus, IMQ, PSE, SEMKO, VDE).

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

A: The package classification is 5mm x 20mm (Axial) for all three parts. The 5HTP 4 and 5HTP 4-R have identical dimensions of 0.217" Dia x 0.827" L (5.50mm x 21.00mm). The 0001.2510.PT has dimensions of 0.213" Dia x 0.886" L (5.40mm x 22.50mm), representing minor variations within the 5mm x 20mm form factor that remain compatible with standard through-hole mounting.

Q: Does the difference in DC cold resistance affect substitution?

A: The 5HTP 4 has 0.026 Ohms DC cold resistance, while the 5HTP 4-R has 0.03 Ohms. This minor difference does not affect circuit protection function or compatibility in standard fuse holder applications.

Q: Which part should be selected for new designs?

A: For new designs, either 5HTP 4-R or 0001.2510.PT is appropriate. Selection depends on certification requirements and whether DC voltage protection capability is needed. Both parts carry ROHS3 compliance and active product status, ensuring long-term availability.