Equivalent & Substitute Parts for 5HT 8 Ceramic Fuse

Part Overview

The 5HT 8 is an 8A 250VAC ceramic cartridge fuse manufactured by Bel Fuse Inc., designed for 5mm x 20mm holder applications. This part is classified as obsolete, making equivalent substitutes necessary for ongoing system maintenance and new designs. The 5HT 8 provides slow-blow response characteristics suitable for circuits requiring transient current tolerance. Identification of compatible alternatives ensures design continuity and supply chain flexibility.

Substiute Parts

5HT 8

Bel Fuse Inc.In Stock: 10315HT 8 Datasheet

Current PartRFQ

5HT 8-R

Bel Fuse Inc.In Stock: 60915HT 8-R Datasheet

DirectRFQ

0001.2513

SCHURTER Inc.In Stock: 559540001.2513 Datasheet

DirectRFQ

0034.2525

SCHURTER Inc.In Stock: 13020034.2525 Datasheet

SimilarRFQ

0215008.MXBP

Littelfuse Inc.In Stock: 10330215008.MXBP Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 5HT 8 is determined by the following mandatory parameters: current rating (8A), AC voltage rating (250V), fuse type (cartridge ceramic), physical package (5mm x 20mm), response time (slow blow), and mounting configuration (requires holder). Parts meeting all these criteria are classified as direct equivalents. Parts with variations in secondary parameters such as DC voltage rating, melting I²t characteristics, or response time classification are classified as similar alternatives and require application-specific validation.

The substitute parts listed below are grouped by substitution classification:

Direct Equivalents: Parts with identical electrical and mechanical specifications to the 5HT 8.

Similar Alternatives: Parts with compatible primary specifications but variations in secondary electrical characteristics or response time classification.

Parameter Comparison

Engineering Selection Recommendations

5HT 8-R (Bel Fuse Inc.): This part is the primary direct equivalent to the 5HT 8. It maintains identical electrical specifications (8A, 250VAC, slow-blow response, 1.5kA breaking capacity) and mechanical package (5mm x 20mm). The 5HT 8-R is active in production status and ROHS3 compliant, making it the preferred substitute for new designs and maintenance applications. Approval certifications include CE, CSA, and cURus.

0001.2513 (SCHURTER Inc.): This part is a direct electrical equivalent with identical current rating, AC voltage rating, slow-blow response, and package dimensions. It includes DC voltage rating (150V) and maintains 1.5kA breaking capacity at DC. The part is active in production and ROHS3 compliant with cURus and VDE certifications. Melting I²t (268) is lower than the 5HT 8 (330), which may affect transient current handling characteristics in specific applications.

0034.2525 (SCHURTER Inc.): This part shares the 8A current rating, 250VAC voltage rating, and 5mm x 20mm package with the 5HT 8. However, it features medium-blow response time (versus slow-blow), reduced breaking capacity (300A), lower melting I²t (237), and narrower operating temperature range (-40°C ~ 85°C). This part is suitable only for applications where medium-blow response is acceptable and operating temperatures remain within the specified range.

0215008.MXBP (Littelfuse Inc.): This part is a direct electrical equivalent with identical 8A current rating, 250VAC voltage rating, slow-blow response, and 1.5kA breaking capacity. It is active in production and ROHS3 compliant with comprehensive certifications (CE, CSA, KC, PSE, SEMKO, UL, VDE). Melting I²t (209.88) is lower than the 5HT 8, which may affect transient current handling in sensitive applications.

Frequently Asked Questions (FAQ)

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

A: Yes. The 5HT 8-R maintains identical electrical specifications (8A, 250VAC, slow-blow response, 1.5kA breaking capacity) and mechanical package (5mm x 20mm). Both parts require the same holder configuration. The primary difference is product status: the 5HT 8 is obsolete while the 5HT 8-R is active in production.

Q: What is the significance of melting I²t values in fuse selection?

A: Melting I²t represents the thermal energy required to melt the fuse element. Lower I²t values indicate faster response to overcurrent conditions. The 5HT 8 has a melting I²t of 330, while substitutes range from 209.88 to 330. Applications with strict transient current tolerance requirements should prioritize parts with I²t values closest to the original specification.

Q: Can 0034.2525 be used in place of the 5HT 8?

A: 0034.2525 is not recommended as a direct substitute. While it shares the 8A current rating and 5mm x 20mm package, it features medium-blow response (versus slow-blow), significantly lower breaking capacity (300A versus 1.5kA), and a narrower operating temperature range (-40°C ~ 85°C versus -55°C ~ 125°C). Use only if the application specifically requires medium-blow response and operates within the reduced temperature range.

Q: Are all substitute parts ROHS3 compliant?

A: The 5HT 8 is RoHS non-compliant. All listed substitutes (5HT 8-R, 0001.2513, 0034.2525, and 0215008.MXBP) are ROHS3 compliant, making them suitable for applications with RoHS compliance requirements.

Q: What certifications should I verify for my specific application?

A: Certification requirements depend on end-use application and regional standards. The 5HT 8 carries CCC, CE, CSA, and UL approvals. Substitutes carry varying certifications: 5HT 8-R (CE, CSA, cURus), 0001.2513 (cURus, VDE), 0034.2525 (none listed), and 0215008.MXBP (CE, CSA, KC, PSE, SEMKO, UL, VDE). Verify that the selected substitute meets all required certifications for your application.

Q: Can these fuses be used in different holder types?

A: No. All listed parts require a 5mm x 20mm holder. They are not compatible with other fuse holder configurations. Verify holder compatibility before component selection.