Equivalent & Substitute Parts for 5MF 700-R Glass Cartridge Fuse

Part Overview

The 5MF 700-R is a 700 mA, 250 V AC/DC fast-blow glass cartridge fuse manufactured by Bel Fuse Inc. in a 5mm x 20mm form factor. This fuse is designed for circuit protection applications requiring a holder for installation. The part maintains active product status with 1763 units in current inventory. Substitute parts are identified to provide alternative sourcing options when the primary part is unavailable or when design flexibility permits component selection from qualified manufacturers.

Substiute Parts

5MF 700-R

Bel Fuse Inc.In Stock: 18505MF 700-R Datasheet

Current PartRFQ

0235.700HXP

Littelfuse Inc.In Stock: 9430235.700HXP Datasheet

DirectRFQ

0235.700MXP

Littelfuse Inc.In Stock: 30420235.700MXP Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 5MF 700-R is determined by strict equivalence across the following critical parameters:

• Current Rating: 700 mA (exact match required)
• Voltage Rating (AC): 250 V (exact match required)
• Fuse Type: Cartridge, Glass (exact match required)
• Response Time: Fast Blow (exact match required)
• Package / Case: 5mm x 20mm (exact match required)
• Operating Temperature Range: -55°C ~ 125°C (exact match required)
• RoHS Compliance: ROHS3 Compliant (exact match required)

The substitute parts 0235.700HXP and 0235.700MXP, both manufactured by Littelfuse Inc., meet all critical substitution criteria. Both parts are classified as active products with current inventory availability. Dimensional variations within manufacturing tolerances (5.10mm vs. 5.20mm diameter) do not affect functional compatibility in standard fuse holder applications.

Parameter Comparison

Engineering Selection Recommendations

All three parts—5MF 700-R, 0235.700HXP, and 0235.700MXP—are active products with current manufacturing status and full RoHS3 compliance. Selection among these equivalents may be based on:

• Inventory availability: 0235.700MXP offers the highest stock level (2986 units), followed by 5MF 700-R (1763 units) and 0235.700HXP (919 units).
• Regulatory certifications: The Littelfuse parts (0235.700HXP and 0235.700MXP) include KC approval in addition to CE, CSA, and UL certifications, providing broader geographic compliance coverage.
• Electrical characteristics: The 5MF 700-R exhibits higher breaking capacity (200A vs. 35A) and higher melting I²t (0.265 vs. 0.156), which may be relevant for specific circuit protection requirements.

Frequently Asked Questions (FAQ)

Q: Can 0235.700HXP and 0235.700MXP be used interchangeably with 5MF 700-R?

A: Yes. Both Littelfuse parts meet all critical substitution parameters: 700 mA current rating, 250 V AC voltage rating, fast-blow response, 5mm x 20mm package, and identical operating temperature range. Both are active products with current inventory.

Q: What is the significance of the dimensional difference (5.10mm vs. 5.20mm diameter)?

A: The 0.10mm diameter variation falls within standard manufacturing tolerances for fuse cartridges and does not affect compatibility with standard 5mm x 20mm fuse holders.

Q: Are there differences in breaking capacity between these parts?

A: Yes. The 5MF 700-R has a breaking capacity of 200A, while both Littelfuse substitutes have 35A breaking capacity. Breaking capacity defines the maximum fault current the fuse can safely interrupt. Application requirements determine whether this difference is material.

Q: Do all three parts have the same regulatory approvals?

A: No. The 5MF 700-R carries CE, CSA, and cULus approvals. The Littelfuse parts (0235.700HXP and 0235.700MXP) carry CE, CSA, KC, and UL approvals. Both certification sets satisfy standard industrial and consumer electronics requirements.

Q: What is the difference between 0235.700HXP and 0235.700MXP?

A: Both parts are electrically and mechanically identical. The primary difference is inventory availability: 0235.700MXP has 2986 units in stock compared to 919 units for 0235.700HXP.