Littelfuse 0318.500MXP Glass Cartridge Fuse Equivalent & Substitute Parts

Part Overview

The Littelfuse 0318.500MXP is a 500 mA, 250 V AC/DC fast-blow glass cartridge fuse designed for through-hole mounting in 3AB and 3AG package configurations. This component is classified as Active product status and maintains full compliance with international safety standards including CE, CSA, and UL certifications. Equivalent and substitute parts are identified when identical electrical ratings, mechanical dimensions, and approval certifications are maintained across alternative manufacturer part numbers within the same product series.

Substiute Parts

0318.500MXP

Littelfuse Inc.In Stock: 12170318.500MXP Datasheet

Current PartRFQ

0318.500HXP

Littelfuse Inc.In Stock: 10460318.500HXP Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the Littelfuse 0318.500MXP is determined by strict equivalence across the following critical parameters:

• Current Rating: 500 mA (exact match required)
• Voltage Rating: 250 V AC (exact match required)
• Response Time: Fast Blow (exact match required)
• Package Configuration: 3AB, 3AG, 1/4" x 1-1/4" (Axial) (exact match required)
• Mounting Type: Through Hole (exact match required)
• Breaking Capacity: 35 A @ Rated Voltage (exact match required)
• Melting I²t: 0.483 (exact match required)
• Approval Certifications: CE, CSA, UL (all certifications must be present)
• RoHS Compliance: ROHS3 Compliant (exact match required)

The substitute part 0318.500HXP meets all these criteria and is therefore classified as a parametric equivalent within the Littelfuse 318 series.

Parameter Comparison

Engineering Selection Recommendations

Both the 0318.500MXP and 0318.500HXP maintain Active product status within the Littelfuse 318 series. Selection between these parts is based on inventory availability and supply chain considerations, as all electrical, mechanical, and compliance parameters are identical. Both parts carry full CE, CSA, and UL certifications and maintain ROHS3 compliance. The 0318.500MXP currently has 1139 pieces in stock, while the 0318.500HXP has 1003 pieces available. Either part is suitable for direct substitution in applications requiring a 500 mA, 250 V AC/DC fast-blow glass cartridge fuse with 3AB/3AG package configuration.

Frequently Asked Questions (FAQ)

Q: Can the 0318.500HXP be used as a direct replacement for the 0318.500MXP?

A: Yes. The 0318.500HXP is a parametric equivalent with identical current rating, voltage rating, response time, package configuration, breaking capacity, melting I²t, operating temperature range, and approval certifications. Direct substitution is permissible.

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

A: Substitution eligibility is determined by exact matching of current rating (500 mA), voltage rating (250 V AC), response time (Fast Blow), package configuration (3AB, 3AG, 1/4" x 1-1/4" Axial), mounting type (Through Hole), breaking capacity (35 A), melting I²t (0.483), and approval certifications (CE, CSA, UL).

Q: Are there differences in physical dimensions between these parts?

A: No. Both parts share identical dimensions of 0.275" diameter by 1.288" length (6.99 mm x 32.72 mm), ensuring mechanical compatibility in existing PCB layouts and through-hole mounting configurations.

Q: Do both parts meet the same regulatory and compliance standards?

A: Yes. Both the 0318.500MXP and 0318.500HXP carry identical CE, CSA, and UL certifications and maintain ROHS3 compliance status.

Q: What is the difference between these two part numbers if all parameters are identical?

A: The part numbers reflect different manufacturing batches or internal Littelfuse product line designations within the 318 series. From an engineering perspective, they are functionally and mechanically equivalent.