Littelfuse 0239005.MXP Glass Cartridge Fuse 5A 125VAC 5x20mm Equivalent & Substitute Parts

Part Overview

The Littelfuse 0239005.MXP is a 5 A, 125 V AC/DC slow-blow glass cartridge fuse in 5mm x 20mm form factor. This component is classified as Active product status and is designed for applications requiring overcurrent protection in low-voltage circuits. Substitute parts are identified when equivalent electrical and mechanical specifications are required due to inventory constraints, supply chain considerations, or application-specific requirements.

Substiute Parts

0239005.MXP

Littelfuse Inc.In Stock: 83140239005.MXP Datasheet

Current PartRFQ

0239005.HXP

Littelfuse Inc.In Stock: 20870239005.HXP Datasheet

DirectRFQ

5TT 5-R

Bel Fuse Inc.In Stock: 398595TT 5-R Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the Littelfuse 0239005.MXP are qualified based on the following critical parameters:

• Current Rating: 5 A (exact match required)
• Voltage Rating (AC): 125 V (exact match required)
• Fuse Type: Cartridge, Glass (exact match required)
• Response Time: Slow Blow (exact match required)
• Package / Case: 5mm x 20mm (exact match required)
• Breaking Capacity @ Rated Voltage: 10kA (exact match required)
• Operating Temperature Range: -55°C ~ 125°C (exact match required)
• Mounting Type: Requires Holder (exact match required)

All identified substitute parts meet these core electrical and mechanical specifications, ensuring direct functional equivalence in applications designed for the main part number.

Parameter Comparison

Engineering Selection Recommendations

All three parts—0239005.MXP, 0239005.HXP, and 5TT 5-R—are Active product status and meet the core electrical and mechanical requirements for direct substitution. Selection should be based on the following factors:

Littelfuse 0239005.MXP and 0239005.HXP: Both parts are manufactured by Littelfuse Inc. and are identical in electrical and mechanical specifications. The 0239005.HXP variant offers an alternative packaging option within the same product family. Both carry CE, CSA, KC, PSE, and UL approvals.

Bel Fuse 5TT 5-R: This part is manufactured by Bel Fuse Inc. and meets all core substitution criteria. It carries CE, CSA, and PSE approvals. The Melting I²t value (157) differs from the Littelfuse variants (302.836), and the DC Cold Resistance is 0.02 Ohms compared to 0.0199 Ohms in the Littelfuse parts. These minor variations remain within acceptable tolerance for the specified 5 A, 125 V slow-blow cartridge fuse application.

Frequently Asked Questions (FAQ)

Q: Can the Littelfuse 0239005.HXP directly replace the 0239005.MXP?

A: Yes. Both parts are manufactured by Littelfuse Inc. and share identical electrical and mechanical specifications, including current rating, voltage rating, fuse type, response time, package dimensions, breaking capacity, and operating temperature range.

Q: Is the Bel Fuse 5TT 5-R a direct substitute for the Littelfuse 0239005.MXP?

A: Yes. The 5TT 5-R meets all critical substitution parameters: 5 A current rating, 125 V AC voltage rating, slow-blow glass cartridge fuse type, 5mm x 20mm package, 10kA breaking capacity, and -55°C to 125°C operating temperature range. Minor differences in Melting I²t and DC Cold Resistance do not affect functional equivalence in standard applications.

Q: What are the key parameters that determine substitution eligibility?

A: Substitution eligibility is determined by exact matching of: current rating (5 A), voltage rating (125 V AC), fuse type (cartridge, glass), response time (slow blow), package dimensions (5mm x 20mm), breaking capacity (10kA), operating temperature range (-55°C to 125°C), and mounting type (requires holder).

Q: Are all substitute parts RoHS and REACH compliant?

A: Yes. All three parts—0239005.MXP, 0239005.HXP, and 5TT 5-R—are ROHS3 Compliant and REACH Unaffected.

Q: What certifications do these fuses carry?

A: The Littelfuse parts (0239005.MXP and 0239005.HXP) carry CE, CSA, KC, PSE, and UL approvals. The Bel Fuse 5TT 5-R carries CE, CSA, and PSE approvals.