5HF 400 Ceramic Fuse - Equivalent & Substitute Parts

Part Overview

The 5HF 400 is a 400 mA, 250 V AC/DC ceramic cartridge fuse manufactured by Bel Fuse Inc. in a 5mm x 20mm form factor. This component is classified as obsolete, making equivalent and substitute parts necessary for ongoing system maintenance and new design implementations. The fuse provides fast-blow response characteristics suitable for circuit protection applications requiring ceramic construction and holder-based mounting.

Substiute Parts

5HF 400

Bel Fuse Inc.In Stock: 10835HF 400 Datasheet

Current PartRFQ

5HF 400-R

Bel Fuse Inc.In Stock: 22215HF 400-R Datasheet

DirectRFQ

5HFP 400-R

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

DirectRFQ

GDA-400MA

Eaton - Electronics DivisionIn Stock: 1150GDA-400MA Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the 5HF 400 is determined by strict equivalence across the following electrical and mechanical parameters:

• Current Rating: 400 mA (exact match required)
• Voltage Rating: 250 V AC (exact match required)
• Fuse Type: Cartridge, Ceramic (exact match required)
• Response Time: Fast Blow (exact match required)
• Breaking Capacity: 1.5 kA (exact match required)
• Operating Temperature: -55°C ~ 125°C (exact match required)

Substitute parts are grouped into two categories:

Direct Equivalents maintain identical electrical specifications and holder-based mounting requirements. These parts differ only in product status (active vs. obsolete) and compliance certifications.

Functional Equivalent maintains identical electrical specifications but differs in mounting type (through-hole vs. holder-based) or manufacturer, requiring mechanical design consideration.

Parameter Comparison

Engineering Selection Recommendations

5HF 400-R is the primary direct substitute for the obsolete 5HF 400. Both parts maintain identical electrical specifications, holder-based mounting requirements, and operating temperature range. The 5HF 400-R is active in production status and compliant with ROHS3 standards, making it suitable for new designs and system replacements where holder-based mounting is specified.

5HFP 400-R is a functional equivalent from Bel Fuse Inc. with identical electrical specifications but differs in mounting type (through-hole axial vs. holder-based). This part is suitable only for applications where through-hole mounting can be accommodated in the circuit design. The slightly larger physical dimensions (5.50mm x 21.00mm vs. 5.10mm x 20.00mm) require mechanical verification before substitution.

GDA-400MA is a cross-manufacturer substitute from Eaton - Electronics Division. While electrical specifications match, this part exhibits significantly higher DC cold resistance (2.2 Ohms vs. 0.55 Ohms) and substantially lower melting I²t (0.018 vs. 0.091), indicating different thermal characteristics. Additionally, operating temperature range is not specified for this part. GDA-400MA is suitable only when Eaton certification is required and thermal performance differences are acceptable for the application.

Frequently Asked Questions (FAQ)

Q: Can 5HF 400-R directly replace 5HF 400 in existing designs?

A: Yes. The 5HF 400-R maintains identical electrical specifications (400 mA, 250 V AC/DC), response time (fast blow), breaking capacity (1.5 kA), and mounting type (requires holder). Both parts use the same 5mm x 20mm ceramic cartridge form factor and operate across -55°C to 125°C. The primary difference is product status: 5HF 400-R is active production while 5HF 400 is obsolete.

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

A: The primary difference is mounting type. The 5HF 400-R requires a separate fuse holder for installation, while the 5HFP 400-R features through-hole axial leads for direct PCB mounting. Physically, 5HFP 400-R is slightly larger (5.50mm x 21.00mm vs. 5.10mm x 20.00mm). Both maintain identical electrical specifications and fast-blow response. Substitution between these parts requires mechanical design changes to accommodate the different mounting approaches.

Q: Is GDA-400MA electrically equivalent to 5HF 400?

A: GDA-400MA matches the primary electrical specifications (400 mA, 250 V AC/DC, fast blow, 1.5 kA breaking capacity) and physical package (5mm x 20mm). However, it exhibits significantly different thermal characteristics: DC cold resistance is 2.2 Ohms compared to 0.55 Ohms for 5HF 400, and melting I²t is 0.018 compared to 0.091. Operating temperature range is not specified for GDA-400MA. These differences indicate different thermal response behavior and require application-specific evaluation before substitution.

Q: Which substitute part should I select for new designs?

A: For new designs requiring holder-based mounting, 5HF 400-R is the recommended substitute. It is active in production, ROHS3 compliant, and maintains all electrical and thermal specifications of the obsolete 5HF 400. If through-hole mounting is acceptable, 5HFP 400-R is an alternative from the same manufacturer. GDA-400MA should be selected only when Eaton certification is a specific design requirement and thermal performance differences are acceptable.

Q: Are all substitute parts RoHS compliant?

A: 5HF 400-R and 5HFP 400-R are both ROHS3 compliant. The original 5HF 400 is RoHS non-compliant. GDA-400MA RoHS status is not specified in available documentation. For applications requiring RoHS compliance, 5HF 400-R or 5HFP 400-R are appropriate selections.