Equivalent & Substitute Parts for 5HT 315-R Ceramic Fuse

Part Overview

The 5HT 315-R is a ceramic cartridge fuse manufactured by Bel Fuse Inc., rated for 315 mA at 250 V AC/DC with a 5mm x 20mm form factor. This slow-blow fuse is designed for applications requiring overcurrent protection in industrial and commercial equipment. The part is active in production with full RoHS3 compliance and international safety certifications. Substitute parts are identified based on matching electrical ratings, mechanical dimensions, and functional characteristics to ensure direct interchangeability in existing fuse holders.

Substiute Parts

5HT 315-R

Bel Fuse Inc.In Stock: 19905HT 315-R Datasheet

Current PartRFQ

5HTP 315-R

Bel Fuse Inc.In Stock: 21175HTP 315-R Datasheet

Parametric EquivalentRFQ

0215.315MXP

Littelfuse Inc.In Stock: 168150215.315MXP Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 5HT 315-R is determined by strict equivalence across the following parameters:

Critical Matching Parameters:

• Current Rating: 315 mA (exact match required)
• Voltage Rating: 250 V AC (exact match required)
• Package Dimensions: 5mm x 20mm (exact match required)
• Fuse Type: Cartridge, Ceramic (exact match required)
• Response Time: Slow Blow (exact match required)
• Breaking Capacity: 1.5 kA @ Rated Voltage (exact match required)
• Operating Temperature Range: -55°C to 125°C (exact match required)

Acceptable Variation Parameters:

• Melting I²t: Variation permitted within thermal characteristics
• DC Cold Resistance: Variation permitted within electrical characteristics
• Approval Agencies: Variation permitted provided certifications are maintained
• Manufacturer: Different manufacturers acceptable if all critical parameters match

All identified substitute parts meet these criteria and are suitable for direct replacement in applications designed for the 5HT 315-R.

Parameter Comparison

Engineering Selection Recommendations

5HTP 315-R (Bel Fuse Inc.): This substitute maintains identical electrical and mechanical specifications to the 5HT 315-R with matching current rating, voltage rating, and package dimensions. Both parts are manufactured by Bel Fuse Inc. and carry active product status. The 5HTP 315-R includes additional CE certification alongside existing CCC, CSA, and cULus approvals, providing expanded compliance coverage. Melting I²t differs at 0.18 versus 0.22, representing acceptable thermal characteristic variation within the slow-blow fuse category.

0215.315MXP (Littelfuse Inc.): This substitute is manufactured by Littelfuse Inc. and meets all critical electrical and mechanical parameters. The part carries CE, SEMKO, UL, and VDE certifications, providing comprehensive international compliance. Physical dimensions show minor variation (5.20mm diameter versus 5.10mm), which remains within acceptable tolerance for standard 5mm x 20mm fuse holders. DC cold resistance is lower at 0.88 Ohms compared to 2.08 Ohms in the primary part, and melting I²t is higher at 0.975. These variations are characteristic of different ceramic fuse designs and do not affect functional interchangeability for the specified 315 mA, 250 V application.

All three parts are active products with full RoHS3 compliance and REACH unaffected status, suitable for direct substitution based on availability and certification requirements.

Frequently Asked Questions (FAQ)

Q: Can the 5HTP 315-R be used as a direct replacement for the 5HT 315-R?

A: Yes. Both parts are manufactured by Bel Fuse Inc. and share identical current rating (315 mA), voltage rating (250 V AC), package dimensions (5mm x 20mm), fuse type (ceramic cartridge), response time (slow blow), and breaking capacity (1.5 kA). The parts are mechanically and electrically interchangeable in existing fuse holders.

Q: Is the Littelfuse 0215.315MXP compatible with equipment designed for the 5HT 315-R?

A: Yes. The 0215.315MXP meets all critical electrical specifications: 315 mA current rating, 250 V AC voltage rating, 1.5 kA breaking capacity, and slow-blow response time. Physical dimensions are 5.20mm diameter x 20mm length, which fits standard 5mm x 20mm fuse holders. The part is suitable for direct substitution.

Q: What is the difference in melting I²t between these fuses?

A: Melting I²t values differ across the three parts: 5HT 315-R (0.22), 5HTP 315-R (0.18), and 0215.315MXP (0.975). These variations reflect different ceramic fuse designs and thermal characteristics. All three parts are rated as slow-blow fuses and function within the same 315 mA, 250 V application envelope. The variation does not affect interchangeability for standard overcurrent protection applications.

Q: Are all three parts RoHS3 compliant?

A: Yes. The 5HT 315-R, 5HTP 315-R, and 0215.315MXP are all ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements.

Q: What certifications does each part carry?

A: 5HT 315-R carries CCC, CSA, and cURus certifications. 5HTP 315-R carries CCC, CE, CSA, and cULus certifications. 0215.315MXP carries CE, SEMKO, UL, and VDE certifications. Selection should be based on specific regional compliance requirements for the end application.

Q: Can these fuses be used in any 5mm x 20mm fuse holder?

A: Yes. All three parts are cartridge fuses requiring a holder and are designed for standard 5mm x 20mm fuse holder applications. Physical dimensions are compatible with industry-standard holders.

Q: What is the operating temperature range for these fuses?

A: All three parts operate across the temperature range of -55°C to 125°C, providing consistent thermal performance across standard industrial and commercial operating environments.