Equivalent & Substitute Parts for Bel Fuse Inc. 5HF 6.3

Part Overview

The Bel Fuse Inc. 5HF 6.3 is a ceramic cartridge fuse rated at 6.3 A, 250 V AC/DC with a 5mm x 20mm form factor. This component is classified as obsolete, necessitating identification of active equivalent alternatives that maintain identical electrical and mechanical specifications. Substitute parts must preserve the 6.3 A current rating, 250 V voltage rating, fast-blow response characteristic, and 5mm x 20mm package dimensions to ensure direct functional replacement in existing circuit designs.

Substiute Parts

5HF 6.3

Bel Fuse Inc.In Stock: 9365HF 6.3 Datasheet

Current PartRFQ

5HF 6.3-R

Bel Fuse Inc.In Stock: 32395HF 6.3-R Datasheet

DirectRFQ

021606.3HXP

Littelfuse Inc.In Stock: 1340021606.3HXP Datasheet

SimilarRFQ

021606.3MXB940P

Littelfuse Inc.In Stock: 1132021606.3MXB940P Datasheet

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021606.3MXBP

Littelfuse Inc.In Stock: 740021606.3MXBP Datasheet

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021606.3MXP

Littelfuse Inc.In Stock: 2483021606.3MXP Datasheet

SimilarRFQ

021606.3TXP

Littelfuse Inc.In Stock: 958021606.3TXP Datasheet

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021606.3VXP

Littelfuse Inc.In Stock: 901021606.3VXP Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 5HF 6.3 are qualified based on strict electrical and mechanical parameter matching:

Primary Substitution Criteria:

• Current Rating: 6.3 A (exact match required)
• Voltage Rating: 250 V AC (exact match required)
• Fuse Type: Cartridge, Ceramic (exact match required)
• Package Dimensions: 5mm x 20mm (exact match required)
• Response Time: Fast Blow (exact match required)
• Breaking Capacity: 1.5 kA @ rated voltage (exact match required)
• Mounting Type: Requires Holder (exact match required)

Direct Manufacturer Substitute: The 5HF 6.3-R from Bel Fuse Inc. is the direct active equivalent, maintaining all electrical and mechanical specifications while offering improved RoHS3 compliance status.

Cross-Manufacturer Substitutes: Littelfuse Inc. Series 216 ceramic cartridge fuses (021606.3HXP, 021606.3MXB940P, 021606.3MXBP, 021606.3MXP, 021606.3TXP, 021606.3VXP) provide functional equivalence with identical electrical ratings and package form factor. Minor dimensional tolerances exist within acceptable mechanical compatibility ranges.

Parameter Comparison

Engineering Selection Recommendations

Primary Selection: 5HF 6.3-R (Bel Fuse Inc.)

The 5HF 6.3-R is the recommended direct replacement for the obsolete 5HF 6.3. This part maintains identical electrical specifications and package form factor while offering active product status and ROHS3 compliance. Approval agencies include CCC, CE, CSA, cURus, IMQ, PSE, SEMKO, and VDE. Current inventory: 3203 units.

Secondary Selection: Littelfuse Inc. Series 216 Alternatives

When 5HF 6.3-R availability is constrained, Littelfuse Series 216 ceramic cartridge fuses (021606.3HXP, 021606.3MXB940P, 021606.3MXBP, 021606.3MXP, 021606.3TXP, 021606.3VXP) provide functional equivalence. All variants maintain the required 6.3 A, 250 V, fast-blow, 5mm x 20mm specifications with 1.5 kA breaking capacity. These parts carry ROHS3 compliance and broader approval agency coverage including BSI, CCC, CE, CSA, KC, PSE, SEMKO, UR, and VDE. Littelfuse variants exhibit minor differences in melting I²t (56.43 versus 70) and DC cold resistance (0.0137 versus 0.012 Ohms), which remain within acceptable operational tolerances for standard circuit protection applications.

Frequently Asked Questions (FAQ)

Q: Can Littelfuse Series 216 parts directly replace the Bel Fuse 5HF 6.3?

A: Yes. All Littelfuse Series 216 variants listed (021606.3HXP, 021606.3MXB940P, 021606.3MXBP, 021606.3MXP, 021606.3TXP, 021606.3VXP) meet the core electrical and mechanical requirements: 6.3 A current rating, 250 V voltage rating, fast-blow response, 5mm x 20mm package, and 1.5 kA breaking capacity. These parts are mechanically and electrically compatible with existing fuse holders designed for the 5HF 6.3.

Q: What is the difference between the Bel Fuse 5HF 6.3-R and Littelfuse alternatives?

A: The primary differences are manufacturer and minor thermal characteristics. The 5HF 6.3-R maintains the original melting I²t value of 70 and DC cold resistance of 0.012 Ohms. Littelfuse variants have a melting I²t of 56.43 and DC cold resistance of 0.0137 Ohms. Both sets of values are within acceptable ranges for 6.3 A ceramic cartridge fuses and do not affect standard circuit protection performance.

Q: Are all substitute parts RoHS compliant?

A: The original 5HF 6.3 is RoHS non-compliant. The 5HF 6.3-R and all Littelfuse Series 216 variants are ROHS3 compliant, meeting current environmental and regulatory requirements.

Q: Which substitute part has the highest inventory availability?

A: The 5HF 6.3-R (Bel Fuse Inc.) has 3203 units in stock. Among Littelfuse alternatives, the 021606.3MXP has the highest inventory at 2445 units.

Q: Do all substitute parts require the same holder type?

A: Yes. All substitute parts maintain the "Requires Holder" mounting type and are compatible with standard 5mm x 20mm ceramic fuse holders.

Q: What approval agencies certify these substitute parts?

A: The 5HF 6.3-R carries certifications from CCC, CE, CSA, cURus, IMQ, PSE, SEMKO, and VDE. Littelfuse Series 216 variants carry certifications from BSI, CCC, CE, CSA, KC, PSE, SEMKO, UR, and VDE, providing broader international compliance coverage.