Equivalent & Substitute Parts for 5HFP 400 Ceramic Fuse

Part Overview

The 5HFP 400 is a 400 mA, 250 V AC/DC ceramic cartridge fuse with through-hole mounting in a 5mm x 20mm axial package. Manufactured by Bel Fuse Inc., this component is classified as obsolete. Due to its obsolete status, identifying equivalent and substitute parts is necessary to maintain design continuity and ensure component availability for new production runs and field replacements.

Substiute Parts

5HFP 400

Bel Fuse Inc.In Stock: 11835HFP 400 Datasheet

Current PartRFQ

5HF 500-R

Bel Fuse Inc.In Stock: 38405HF 500-R Datasheet

DirectRFQ

5HFP 400-R

Bel Fuse Inc.In Stock: 10045HFP 400-R Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 5HFP 400 is determined by the following critical parameters:

• Current Rating: 400 mA (exact match required for circuit protection integrity)
• Voltage Rating (AC): 250 V (exact match required for safety compliance)
• Fuse Type: Cartridge, Ceramic (functional equivalence)
• Response Time: Fast Blow (circuit protection characteristic)
• Package / Case: 5mm x 20mm (physical form factor)
• Breaking Capacity: 1.5 kA (fault interruption capability)
• Mounting Type: Through Hole (mechanical compatibility)

The 5HFP 400-R qualifies as a direct substitute, maintaining identical electrical and mechanical specifications while offering active product status and RoHS3 compliance. The 5HF 500-R does not qualify as a substitute due to its higher current rating (500 mA) and different mounting requirement (requires holder vs. through hole).

Parameter Comparison

Engineering Selection Recommendations

The 5HFP 400-R is the qualified substitute for the obsolete 5HFP 400. Both components share identical electrical ratings (400 mA, 250 V AC), ceramic cartridge construction, fast-blow response, and through-hole mounting configuration. The 5HFP 400-R maintains active product status with improved compliance: RoHS3 certification and cURus approval provide enhanced regulatory alignment for new designs and production continuity.

The 5HF 500-R is not suitable as a substitute. Its 500 mA current rating exceeds the 400 mA specification, altering circuit protection characteristics. Additionally, its mounting requirement (requires holder) differs from the through-hole configuration of the 5HFP 400, necessitating PCB redesign and mechanical rework.

Frequently Asked Questions (FAQ)

Q: Can the 5HF 500-R be used in place of the 5HFP 400?

A: No. The 5HF 500-R has a 500 mA current rating versus the 400 mA requirement of the 5HFP 400. Using a higher-rated fuse compromises circuit protection and violates the original design specification. Additionally, the 5HF 500-R requires a separate holder, whereas the 5HFP 400 uses through-hole mounting.

Q: What is the difference between the 5HFP 400 and 5HFP 400-R?

A: Both components have identical electrical specifications (400 mA, 250 V AC/DC) and physical dimensions (5mm x 20mm axial, through-hole mounting). The primary differences are product status and compliance: the 5HFP 400 is obsolete and RoHS non-compliant, while the 5HFP 400-R is active and RoHS3 compliant.

Q: Are the physical dimensions of the 5HFP 400 and 5HFP 400-R identical?

A: The dimensions are functionally equivalent for PCB mounting. The 5HFP 400 measures 0.217" diameter x 0.827" length (5.50mm x 21.00mm), while the 5HFP 400-R measures 0.217" diameter x 0.827" length (5.50mm x 21.00mm). Both fit standard 5mm x 20mm through-hole footprints.

Q: What certifications apply to the substitute part?

A: The 5HFP 400-R carries CCC, CE, CSA, and cURus approvals. The original 5HFP 400 carried CCC, CE, CSA, and UL approvals. Both meet international safety standards for ceramic cartridge fuses.

Q: Is the 5HFP 400-R suitable for new product designs?

A: Yes. The 5HFP 400-R is an active product with RoHS3 compliance, making it appropriate for new designs requiring 400 mA, 250 V AC/DC ceramic cartridge fuses with through-hole mounting and fast-blow response.