Littelfuse 031506.3MXP Glass Cartridge Fuse - Equivalent & Substitute Parts

Part Overview

The Littelfuse 031506.3MXP is a 6.3 A, 250 V AC/DC slow-blow glass cartridge fuse with 3AB/3AG package configuration. This through-hole mounted fuse is designed for circuit protection in industrial and commercial applications requiring reliable overcurrent protection with delayed response characteristics. The part maintains active product status with full regulatory compliance across multiple approval agencies. Substitute parts are identified to support inventory continuity, supply chain flexibility, and application requirements where equivalent electrical and mechanical specifications are maintained.

Substiute Parts

031506.3MXP

Littelfuse Inc.In Stock: 1101031506.3MXP Datasheet

Current PartRFQ

031506.3HXP

Littelfuse Inc.In Stock: 1340031506.3HXP Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 031506.3MXP are identified based on strict equivalence across the following critical parameters:

• Current Rating: 6.3 A (exact match required)
• Voltage Rating: 250 V AC (exact match required)
• Fuse Type: Cartridge, Glass (exact match required)
• Response Time: Slow Blow (exact match required)
• Package / Case: 3AB, 3AG, 1/4" x 1-1/4" (Axial) (exact match required)
• Mounting Type: Through Hole (exact match required)
• Breaking Capacity: 200 A (exact match required)
• Physical Dimensions: 0.275" Dia x 1.275" L (exact match required)
• DC Cold Resistance: 0.0154 Ohms (exact match required)
• Operating Temperature Range: -55°C ~ 125°C (exact match required)
• Melting I²t: 242 (exact match required)

The substitute part 031506.3HXP meets all specified electrical and mechanical parameters, ensuring direct functional equivalence for circuit protection applications.

Parameter Comparison

Engineering Selection Recommendations

Both the 031506.3MXP and 031506.3HXP maintain active product status with identical regulatory compliance across CE, CSA, K-MARK, PSE, and UL approval agencies. Both parts are ROHS3 compliant and carry REACH Unaffected status, meeting environmental and regulatory requirements for industrial applications. Selection between these parts may be based on inventory availability, supply chain considerations, or procurement lead times, as electrical and mechanical performance characteristics are equivalent. The 031506.3HXP currently maintains higher inventory levels (1253 Pcs vs. 1083 Pcs), which may support faster procurement cycles where supply continuity is a consideration.

Frequently Asked Questions (FAQ)

Q: Can the 031506.3HXP be used as a direct replacement for the 031506.3MXP?

A: Yes. Both parts share identical electrical ratings (6.3 A, 250 V AC), fuse type (cartridge, glass), response characteristics (slow blow), package configuration (3AB, 3AG), physical dimensions (0.275" Dia x 1.275" L), and regulatory certifications. Direct substitution is supported for all circuit protection applications.

Q: Are there any differences in breaking capacity or melting characteristics?

A: No. Both parts specify 200 A breaking capacity at rated voltage and 242 melting I²t, ensuring equivalent protection performance across the rated operating range.

Q: Do both parts meet the same regulatory standards?

A: Yes. Both the 031506.3MXP and 031506.3HXP carry identical approval agency certifications (CE, CSA, K-MARK, PSE, UL) and maintain ROHS3 compliance with REACH Unaffected status.

Q: What is the operating temperature range for these fuses?

A: Both parts operate across -55°C to 125°C, supporting applications in industrial environments with wide temperature variations.

Q: Are there any package or mounting differences between these parts?

A: No. Both parts use identical through-hole mounting with 3AB/3AG package configuration and matching physical dimensions, ensuring compatibility with existing PCB layouts and fuse holders.