Littelfuse 0239.700H Glass Cartridge Fuse - Equivalent & Substitute Parts

Part Overview

The Littelfuse 0239.700H is a 700 mA, 250 V AC/DC slow-blow glass cartridge fuse in 5mm x 20mm form factor, designed for circuit protection in industrial and commercial applications. This part is classified as obsolete, necessitating identification of active equivalent alternatives that maintain identical electrical and mechanical specifications for direct replacement in existing designs and production environments.

Substiute Parts

0239.700H

Littelfuse Inc.In Stock: 11790239.700H Datasheet

Current PartRFQ

0239.700HXP

Littelfuse Inc.In Stock: 8250239.700HXP Datasheet

Parametric EquivalentRFQ

0239.700MXP

LittelfuseIn Stock: 8820239.700MXP Datasheet

Parametric EquivalentRFQ

0239.700TXP

Littelfuse Inc.In Stock: 9950239.700TXP Datasheet

Parametric EquivalentRFQ

0239.700VXP

Littelfuse Inc.In Stock: 9230239.700VXP Datasheet

Parametric EquivalentRFQ

5TT 700-R

Bel Fuse Inc.In Stock: 16105TT 700-R Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility is determined by strict equivalence across the following critical parameters: current rating (700 mA), voltage rating (250 V AC), response time (slow blow), physical dimensions (5mm x 20mm), fuse type (cartridge glass), and mounting configuration (requires holder). All substitute parts listed maintain these core specifications.

Littelfuse parametric equivalents (0239.700HXP, 0239.700MXP, 0239.700TXP, 0239.700VXP) are direct replacements from the same manufacturer series 239, with active product status and RoHS3 compliance. The Bel Fuse 5TT 700-R represents a cross-manufacturer equivalent from a different series with enhanced breaking capacity (100A vs. 35A) and marginally different physical tolerances within the 5mm x 20mm envelope.

Parameter Comparison

Engineering Selection Recommendations

For direct replacement of the obsolete 0239.700H, the Littelfuse parametric equivalents 0239.700HXP, 0239.700MXP, 0239.700TXP, and 0239.700VXP are preferred selections. These parts maintain identical electrical characteristics, are manufactured by the original equipment supplier, carry active product status, and provide RoHS3 compliance with expanded regulatory certifications (CE, CSA, KC, UL).

The Bel Fuse 5TT 700-R cross-manufacturer equivalent is electrically compatible and offers enhanced breaking capacity (100A), lower DC cold resistance (0.465 Ohms), and cULus certification. This option is suitable for applications where higher fault current handling is beneficial, though dimensional tolerances differ marginally (5.10mm diameter vs. 5.20mm).

Selection between Littelfuse and Bel Fuse alternatives depends on supply chain requirements, regulatory certification scope, and application fault current specifications. All listed substitutes maintain the 700 mA current rating, 250 V voltage rating, slow-blow response, and 5mm x 20mm form factor required for mechanical and electrical compatibility.

Frequently Asked Questions (FAQ)

Q: Can the 0239.700HXP, 0239.700MXP, 0239.700TXP, and 0239.700VXP be used interchangeably with the 0239.700H?

A: Yes. These Littelfuse parts are parametric equivalents with identical current rating (700 mA), voltage rating (250 V AC), response time (slow blow), and physical dimensions (5mm x 20mm). All are glass cartridge fuses requiring a holder and operate across the same temperature range (-55°C to 125°C).

Q: What is the difference between the Littelfuse and Bel Fuse options?

A: The Littelfuse 0239.700HXP, 0239.700MXP, 0239.700TXP, and 0239.700VXP are from the same manufacturer series as the original part. The Bel Fuse 5TT 700-R is a cross-manufacturer equivalent with higher breaking capacity (100A vs. 35A), lower DC cold resistance (0.465 Ohms vs. 0.5375 Ohms), and slightly different physical tolerances (5.10mm diameter vs. 5.20mm).

Q: Are all substitute parts RoHS compliant?

A: Yes. All listed substitute parts (0239.700HXP, 0239.700MXP, 0239.700TXP, 0239.700VXP, and 5TT 700-R) are RoHS3 compliant. The original 0239.700H is RoHS non-compliant.

Q: Do the substitute parts fit the same fuse holder as the 0239.700H?

A: The Littelfuse equivalents (0239.700HXP, 0239.700MXP, 0239.700TXP, 0239.700VXP) maintain the 5mm x 20mm form factor and are designed for the same holder configuration. The Bel Fuse 5TT 700-R has a nominal diameter of 5.10mm (vs. 5.20mm) and length of 20mm, which may require holder tolerance verification for applications with tight mechanical specifications.

Q: What certifications apply to each substitute part?

A: Littelfuse equivalents carry CE, CSA, KC, and UL certifications. The Bel Fuse 5TT 700-R carries CE, CSA, and cULus certifications. The original 0239.700H carries CSA, K-MARK, METI, and UL certifications.

Q: Can I use the 5TT 700-R in place of the Littelfuse options?

A: Yes, electrically and mechanically. The 5TT 700-R maintains the 700 mA current rating, 250 V voltage rating, slow-blow response, and 5mm x 20mm envelope. The higher breaking capacity (100A) and lower DC cold resistance provide enhanced performance characteristics suitable for higher fault current applications.