5HFP 1.25 Ceramic Fuse Equivalent & Substitute Parts

Part Overview

The 5HFP 1.25 is a 1.25 A, 250 V AC/DC ceramic cartridge fuse manufactured by Bel Fuse Inc. with fast-blow response characteristics. This through-hole mounted fuse is designed for 5mm x 20mm axial applications and operates across a temperature range of -55°C to 125°C. The product is currently listed as obsolete, making identification of functionally equivalent alternatives essential for ongoing system maintenance and component procurement.

Substiute Parts

5HFP 1.25

Bel Fuse Inc.In Stock: 10265HFP 1.25 Datasheet

Current PartRFQ

5HF 1.6-R

Bel Fuse Inc.In Stock: 17975HF 1.6-R Datasheet

DirectRFQ

5HFP 1.25-R

Bel Fuse Inc.In Stock: 22035HFP 1.25-R Datasheet

DirectRFQ

0001.1005.PT

SCHURTER Inc.In Stock: 42130001.1005.PT Datasheet

DirectRFQ

02161.25MXEP

Littelfuse Inc.In Stock: 197302161.25MXEP Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 5HFP 1.25 is determined by strict alignment of the following electrical and mechanical parameters:

• Current Rating: 1.25 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: Fast Blow (exact match required)
• Breaking Capacity @ Rated Voltage: 1.5 kA (exact match required)
• Operating Temperature Range: -55°C to 125°C (exact match required)

Three substitute parts meet all substitution criteria and are classified as direct equivalents: 5HFP 1.25-R (Bel Fuse Inc.), 0001.1005.PT (SCHURTER Inc.), and 02161.25MXEP (Littelfuse Inc.). All three parts are currently in active product status with full inventory availability.

The part 5HF 1.6-R does not qualify as a direct substitute due to a higher current rating (1.6 A versus 1.25 A) and different mounting type (Requires Holder versus Through Hole).

Parameter Comparison

Engineering Selection Recommendations

All three substitute parts (5HFP 1.25-R, 0001.1005.PT, and 02161.25MXEP) are functionally equivalent to the obsolete 5HFP 1.25 and meet identical electrical and mechanical specifications.

For applications requiring RoHS3 compliance, all three substitutes are compliant, whereas the original 5HFP 1.25 is non-compliant. The 5HFP 1.25-R maintains manufacturer continuity with Bel Fuse Inc. and carries the broadest approval agency certifications (CCC, CE, CSA, cULus, IMQ, PSE, SEMKO, VDE).

The 0001.1005.PT from SCHURTER Inc. offers the highest current inventory level (4117 pcs) and carries cURus certification. The 02161.25MXEP from Littelfuse Inc. provides the most comprehensive approval agency coverage (CCC, CE, CSA, KC, PSE, SEMKO, UL, VDE) and includes UL certification.

Frequently Asked Questions (FAQ)

Q: Can the 5HF 1.6-R be used as a substitute for the 5HFP 1.25?

A: No. The 5HF 1.6-R has a higher current rating (1.6 A versus 1.25 A) and requires a separate holder for mounting, whereas the 5HFP 1.25 is a through-hole mounted component. These differences make it unsuitable as a direct substitute.

Q: What are the key parameters that determine substitution eligibility?

A: Substitution requires exact matching of current rating (1.25 A), voltage rating (250 V AC), fuse type (Cartridge, Ceramic), package dimensions (5mm x 20mm Axial), mounting type (Through Hole), response time (Fast Blow), breaking capacity (1.5 kA), and operating temperature range (-55°C to 125°C).

Q: Are all three substitute parts physically interchangeable?

A: Yes. All three substitute parts share identical electrical ratings, package dimensions, and through-hole mounting configuration. Physical dimensions vary slightly (diameter and length within millimeter tolerances), but all fit standard 5mm x 20mm axial fuse holders.

Q: Which substitute part offers the best compliance profile?

A: All three substitutes are ROHS3 compliant. The 02161.25MXEP from Littelfuse Inc. carries the broadest regulatory approvals including UL certification. The 5HFP 1.25-R from Bel Fuse Inc. maintains manufacturer continuity and includes cULus certification.

Q: What is the inventory availability for each substitute?

A: 5HFP 1.25-R: 2121 pcs; 0001.1005.PT: 4117 pcs; 02161.25MXEP: 1887 pcs. All substitutes are in active production status with new original stock available.