Littelfuse 0318.250MXP Glass Cartridge Fuse - Equivalent & Substitute Parts

Part Overview

The Littelfuse 0318.250MXP is a 250 mA, 250 V AC/DC fast-blow glass cartridge fuse designed for through-hole mounting in 3AB and 3AG package configurations. This fuse is actively produced and maintains full compliance with international safety standards including CE, CSA, and UL certifications. Finding equivalent substitute parts is necessary to ensure design flexibility, manage supply chain continuity, and maintain inventory availability across manufacturing operations.

Substiute Parts

0318.250MXP

Littelfuse Inc.In Stock: 9000318.250MXP Datasheet

Current PartRFQ

0318.250HXP

Littelfuse Inc.In Stock: 10640318.250HXP Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 0318.250MXP are determined by strict equivalence across the following critical parameters:

• Current Rating: 250 mA (exact match required)
• Voltage Rating: 250 V AC (exact match required)
• Fuse Type: Cartridge, Glass (exact match required)
• Response Time: Fast 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: 35A (exact match required)
• Melting I²t: 0.0355 (exact match required)
• Operating Temperature Range: -55°C ~ 125°C (exact match required)
• Approval Agencies: CE, CSA, UL (exact match required)
• RoHS Compliance: ROHS3 Compliant (exact match required)

The substitute part 0318.250HXP meets all these criteria and is therefore a direct parametric equivalent.

Parameter Comparison

Engineering Selection Recommendations

Both the 0318.250MXP and 0318.250HXP are active products manufactured by Littelfuse Inc. with identical electrical and mechanical specifications. Both parts carry full compliance with CE, CSA, and UL certifications and meet ROHS3 requirements. Selection between these parts may be based on inventory availability, lead time, or procurement source, as they are functionally and electrically interchangeable in all applications where the 0318.250MXP is specified.

Frequently Asked Questions (FAQ)

Q: Can the 0318.250HXP be used as a direct replacement for the 0318.250MXP?

A: Yes. The 0318.250HXP is a direct parametric equivalent with identical current rating, voltage rating, fuse type, response time, package configuration, mounting type, breaking capacity, melting I²t, operating temperature range, and regulatory certifications.

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

A: No. Both parts share identical physical dimensions of 0.275" diameter by 1.288" length (6.99mm x 32.72mm) and are packaged in the same 3AB, 3AG, 1/4" x 1-1/4" (Axial) configuration.

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

A: Yes. Both the 0318.250MXP and 0318.250HXP carry identical approvals from CE, CSA, and UL, and both are ROHS3 compliant.

Q: What is the difference between the part numbers if they are equivalent?

A: The part numbers differ in their suffix designation (MXP versus HXP), which may reflect internal Littelfuse manufacturing or packaging variations. However, all critical electrical and mechanical parameters remain identical.

Q: Can these fuses be used interchangeably in PCB designs?

A: Yes. Both parts are through-hole mounted cartridge fuses with identical package specifications and can be used interchangeably in any design that specifies either part number.