Equivalent & Substitute Parts for 5HF 2.5

Part Overview

The 5HF 2.5 is a 2.5 A ceramic cartridge fuse rated for 250 V AC/DC operation in a 5mm x 20mm form factor, manufactured by Bel Fuse Inc. This component is classified as obsolete, requiring identification of active equivalent alternatives for new designs and ongoing maintenance applications. The fast-blow response characteristic and ceramic construction provide protection in standard industrial and consumer electronics circuits. Substitute parts must maintain identical electrical ratings, mechanical dimensions, and thermal characteristics to ensure direct functional replacement without circuit redesign.

Substiute Parts

5HF 2.5

Bel Fuse Inc.In Stock: 9215HF 2.5 Datasheet

Current PartRFQ

5HFP 2.5-R

Bel Fuse Inc.In Stock: 18235HFP 2.5-R Datasheet

DirectRFQ

5HF 2.5-R

Bel Fuse Inc.In Stock: 27095HF 2.5-R Datasheet

Parametric EquivalentRFQ

021602.5HXP

Littelfuse Inc.In Stock: 944021602.5HXP Datasheet

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021602.5MXBP

Littelfuse Inc.In Stock: 937021602.5MXBP Datasheet

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021602.5MXP

Littelfuse Inc.In Stock: 4061021602.5MXP Datasheet

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021602.5TXP

Littelfuse Inc.In Stock: 971021602.5TXP Datasheet

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021602.5VXP

Littelfuse Inc.In Stock: 1189021602.5VXP Datasheet

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GDA-2.5A

Eaton - Electronics DivisionIn Stock: 1048GDA-2.5A Datasheet

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S501-2.5-R

Eaton - Electronics DivisionIn Stock: 768S501-2.5-R Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility is determined by strict equivalence across the following parameters: current rating (2.5 A), voltage rating (250 V AC), fuse type (ceramic cartridge), package dimensions (5mm x 20mm), response characteristic (fast blow), breaking capacity (1.5 kA), and mounting requirement (holder-based installation). All substitute parts listed maintain these core electrical and mechanical specifications. Variations in melting I²t values, DC cold resistance, and dimensional tolerances within the specified package class do not preclude functional substitution, as these parameters remain within acceptable operating ranges for the 5mm x 20mm ceramic cartridge fuse category. Compliance certifications and RoHS status are secondary selection criteria based on application requirements.

Parameter Comparison

Engineering Selection Recommendations

For new designs and production applications, 5HF 2.5-R (Bel Fuse Inc.) is the primary direct replacement, offering identical mechanical and electrical specifications with active product status and ROHS3 compliance. This part maintains the same series designation and holder-based mounting architecture as the obsolete 5HF 2.5.

Littelfuse 216 series parts (021602.5HXP, 021602.5MXBP, 021602.5MXP, 021602.5TXP, 021602.5VXP) provide functionally equivalent alternatives with active status and ROHS3 compliance. These parts are suitable for applications requiring multi-source qualification or where Littelfuse supply chain integration is preferred.

Eaton GDA-2.5A and S501-2.5-R offer additional sourcing options with active product status. S501-2.5-R includes ROHS3 compliance and broader certification coverage (BSI, cURus, MITI/JET). GDA-2.5A provides an alternative for applications with established Eaton component qualification.

Selection between substitute parts should prioritize product status (all listed alternatives are active), compliance certifications matching application requirements, and established supplier relationships. All listed parts maintain the 1.5 kA breaking capacity and fast-blow response characteristic required for circuit protection equivalence.

Frequently Asked Questions (FAQ)

Q: Can 5HFP 2.5-R (through-hole variant) replace 5HF 2.5 (holder-based)?

A: No. 5HFP 2.5-R uses through-hole mounting with axial leads, while 5HF 2.5 requires a separate holder for cartridge installation. These are distinct mounting architectures and are not interchangeable without circuit board redesign.

Q: What is the difference between Littelfuse 021602.5MXP and 021602.5TXP?

A: Both parts maintain identical electrical ratings (2.5 A, 250 V AC), package dimensions (5mm x 20mm), and breaking capacity (1.5 kA). The designation suffix indicates internal construction or manufacturing variant within the 216 series. Electrical performance and substitution capability are equivalent.

Q: Are all listed substitutes ROHS3 compliant?

A: Five of nine substitute parts carry explicit ROHS3 compliance: 5HF 2.5-R, all Littelfuse 216 series variants (021602.5HXP, 021602.5MXBP, 021602.5MXP, 021602.5TXP, 021602.5VXP), and S501-2.5-R. GDA-2.5A does not specify RoHS status. Verify compliance requirements for your application before selection.

Q: What certifications are common across all substitutes?

A: CCC, CE, CSA, PSE, and SEMKO certifications are present across all substitute parts. Additional certifications vary by manufacturer: Littelfuse includes KC and VDE; Eaton S501-2.5-R adds BSI, cURus, and MITI/JET; Eaton GDA-2.5A includes IMQ and UR.

Q: Can I use these fuses in any 5mm x 20mm holder?

A: Yes. All listed parts conform to the 5mm x 20mm cartridge fuse standard and are compatible with standard ceramic fuse holders rated for this package size. Verify holder voltage and current ratings match or exceed 250 V and 2.5 A respectively.

Q: What is the significance of melting I²t variation between parts?

A: Melting I²t indicates thermal energy absorption before fuse element rupture. The 5HF 2.5 specifies 6.8 A²s, while Littelfuse variants specify 2.695 A²s and Eaton parts specify 3.9 A²s. All values remain within acceptable ranges for 2.5 A fast-blow ceramic fuses. Variation reflects manufacturing process differences and does not affect circuit protection equivalence for standard applications.

Q: Is the 5HF 2.5 still available for purchase?

A: The 5HF 2.5 is classified as obsolete. Inventory of 814 pieces is available from current stock, but no new production is planned. Active substitutes with higher inventory levels (5HF 2.5-R: 2,601 pieces; 021602.5MXP: 4,022 pieces) are recommended for new procurement.