5HFP 2.5-R Ceramic Fuse Equivalent & Substitute Parts

Part Overview

The 5HFP 2.5-R is a 2.5 A 250 V AC ceramic cartridge fuse manufactured by Bel Fuse Inc., designed for through-hole mounting in 5mm x 20mm form factor. This fast-blow fuse is an active product with full compliance to international standards including CCC, CE, CSA, cULus, IMQ, PSE, SEMKO, and VDE certifications. Equivalent and substitute parts are identified when component availability is limited, supply chain disruptions occur, or design flexibility is required while maintaining identical electrical and mechanical specifications.

Substiute Parts

5HFP 2.5-R

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

Current PartRFQ

0001.1008.PT

SCHURTER Inc.In Stock: 37760001.1008.PT Datasheet

DirectRFQ

021602.5MXEP

Littelfuse Inc.In Stock: 1749021602.5MXEP Datasheet

DirectRFQ

021602.5MXESPP

Littelfuse Inc.In Stock: 1646021602.5MXESPP Datasheet

DirectRFQ

FCD-P-2.5A

OptiFuseIn Stock: 3407FCD-P-2.5A Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 5HFP 2.5-R are classified based on strict electrical and mechanical parameter matching:

Direct Manufacturer Equivalents share identical or functionally equivalent specifications across all critical parameters: 2.5 A current rating, 250 V AC voltage rating, fast-blow response time, 5mm x 20mm ceramic cartridge form factor, through-hole mounting, 1.5 kA breaking capacity, and -55°C to 125°C operating temperature range. These parts are interchangeable in applications where the specified electrical characteristics and physical dimensions are required.

Parametric Equivalents meet all electrical and mechanical requirements but may have minor variations in secondary parameters such as melting I²t values, DC cold resistance, or dimensional tolerances within acceptable ranges. These parts maintain functional compatibility while offering alternative sourcing options.

The following parameters determine substitution eligibility:

• Current Rating: 2.5 A (exact match required)
• Voltage Rating (AC): 250 V (exact match required)
• Fuse Type: Cartridge, Ceramic (exact match required)
• Response Time: Fast Blow (exact match required)
• Package / Case: 5mm x 20mm (exact match required)
• Mounting Type: Through Hole (exact match required)
• Breaking Capacity: 1.5 kA (exact match required)
• Operating Temperature: -55°C ~ 125°C (exact match required)

Parameter Comparison

Engineering Selection Recommendations

All listed substitute parts maintain active product status and meet the core electrical and mechanical requirements of the 5HFP 2.5-R. Selection among these alternatives should be based on the following factors:

Certification Coverage: The 5HFP 2.5-R carries approvals from CCC, CE, CSA, cULus, IMQ, PSE, SEMKO, and VDE. The 021602.5MXEP (Littelfuse) provides the broadest certification alignment with CCC, CE, CSA, KC, PSE, SEMKO, UL, and VDE. The 021602.5MXESPP (Littelfuse) includes CE, CSA, CQC, KC, PSE, UR, and VDE. The 0001.1008.PT (SCHURTER) carries cURus certification. The FCD-P-2.5A (OptiFuse) includes cURus and IEC 60127 approvals. Verify that the selected substitute meets all regulatory requirements for the target application and geographic market.

Dimensional Compatibility: While all parts conform to the 5mm x 20mm nominal package specification, dimensional tolerances vary. The 021602.5MXESPP offers the closest dimensional match to the 5HFP 2.5-R at 5.20mm x 20.00mm. The FCD-P-2.5A matches exactly at 5.50mm x 21.00mm. The 0001.1008.PT and 021602.5MXEP have slightly larger dimensions at 5.40mm x 22.50mm and 5.80mm x 22.50mm respectively. Confirm that PCB footprints and mechanical clearances accommodate these variations.

Inventory Availability: Current stock levels are 1785 pcs (5HFP 2.5-R), 3702 pcs (0001.1008.PT), 1666 pcs (021602.5MXEP), 1634 pcs (021602.5MXESPP), and 3310 pcs (FCD-P-2.5A). Higher inventory levels may support extended lead times or volume requirements.

Frequently Asked Questions (FAQ)

Q: Can the 021602.5MXESPP (Littelfuse) be used as a direct replacement for the 5HFP 2.5-R?

A: Yes. Both parts share identical electrical specifications: 2.5 A current rating, 250 V AC voltage rating, fast-blow response time, 1.5 kA breaking capacity, and -55°C to 125°C operating temperature. Both are ceramic cartridge fuses in 5mm x 20mm form factor with through-hole mounting. The 021602.5MXESPP has dimensional specifications of 5.20mm x 20.00mm, which falls within acceptable tolerance for the 5mm x 20mm package class. Verify that your PCB design accommodates this dimension.

Q: What is the significance of the melting I²t values shown in the parameter comparison?

A: Melting I²t represents the thermal energy required to melt the fuse element and is a secondary characteristic that varies among manufacturers while maintaining the same current rating and response time classification. The 5HFP 2.5-R has a melting I²t of 6.78, while substitutes range from 1.995 to 3.28. These variations reflect different fuse element designs but do not affect the primary function of protecting circuits at 2.5 A. All parts maintain fast-blow response characteristics and identical breaking capacity.

Q: Are there any voltage rating differences between the main part and substitutes?

A: The 5HFP 2.5-R, 0001.1008.PT, 021602.5MXEP, and 021602.5MXESPP are all rated for 250 V AC. The FCD-P-2.5A provides dual voltage rating of 250 V AC and 250 V DC, offering additional flexibility for DC circuit applications. If your application requires DC voltage protection, the FCD-P-2.5A is the appropriate selection.

Q: How do dimensional variations affect PCB design?

A: All substitute parts conform to the 5mm x 20mm nominal cartridge fuse standard. However, actual dimensions vary: 5HFP 2.5-R is 5.50mm x 21.00mm, 0001.1008.PT is 5.40mm x 22.50mm, 021602.5MXEP is 5.80mm x 22.50mm, 021602.5MXESPP is 5.20mm x 20.00mm, and FCD-P-2.5A is 5.50mm x 21.00mm. Verify that your PCB footprint and mechanical clearances accommodate the maximum dimensions of the selected substitute, particularly the 021602.5MXEP at 5.80mm diameter.

Q: Which substitute offers the best certification coverage for international markets?

A: The 021602.5MXEP (Littelfuse) carries the most comprehensive certification set including CCC, CE, CSA, KC, PSE, SEMKO, UL, and VDE. This part is suitable for applications requiring broad international market compliance. The 021602.5MXESPP provides CE, CSA, CQC, KC, PSE, UR, and VDE certifications. Select based on your specific geographic and regulatory requirements.