Littelfuse 0318004.MXP Glass Cartridge Fuse - Equivalent & Substitute Parts

Part Overview

The Littelfuse 0318004.MXP is a 4 A, 250 V AC/DC fast-blow glass cartridge fuse designed for through-hole mounting in 3AB and 3AG package configurations. This fuse is classified as Active product status and carries multiple international approvals including CE, CSA, KC, PSE, and UL certifications. Equivalent substitute parts are identified when all critical electrical and mechanical parameters match the original specification, ensuring direct interchangeability without circuit redesign or validation.

Substiute Parts

0318004.MXP

Littelfuse Inc.In Stock: 8830318004.MXP Datasheet

Current PartRFQ

0318004.HXP

Littelfuse Inc.In Stock: 13050318004.HXP Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 0318004.MXP is determined by strict equivalence across all critical electrical and mechanical parameters. The following parameters must match identically for a part to qualify as a direct substitute:

• Current Rating: 4 A
• Voltage Rating (AC): 250 V
• Fuse Type: Cartridge, Glass
• Response Time: Fast Blow
• Package / Case: 3AB, 3AG, 1/4" x 1-1/4" (Axial)
• Mounting Type: Through Hole
• Breaking Capacity @ Rated Voltage: 200 A
• Melting I²t: 28.5
• Operating Temperature Range: -55°C ~ 125°C
• Size / Dimension: 0.275" Dia x 1.288" L (6.99mm x 32.72mm)
• DC Cold Resistance: 0.0293 Ohms
• Approval Agencies: CE, CSA, KC, PSE, UL
• RoHS Status: ROHS3 Compliant

The 0318004.HXP meets all these criteria and is classified as a parametric equivalent.

Parameter Comparison

Engineering Selection Recommendations

Both the 0318004.MXP and 0318004.HXP are Active product status components manufactured by Littelfuse Inc. and carry identical international certifications (CE, CSA, KC, PSE, UL). Both parts are ROHS3 compliant and REACH unaffected. The 0318004.HXP offers higher inventory availability (1212 Pcs versus 802 Pcs), which may provide supply chain advantages. Selection between these parts is based on availability and procurement lead time, as all electrical, mechanical, and compliance parameters are identical.

Frequently Asked Questions (FAQ)

Q: Can the 0318004.HXP be used as a direct replacement for the 0318004.MXP?

A: Yes. The 0318004.HXP is a parametric equivalent with identical current rating (4 A), voltage rating (250 V AC), fuse type (cartridge, glass), response time (fast blow), package configuration (3AB, 3AG), breaking capacity (200 A), melting I²t (28.5), operating temperature range (-55°C ~ 125°C), physical dimensions (0.275" Dia x 1.288" L), and DC cold resistance (0.0293 Ohms). No circuit modifications are required.

Q: Are the approval certifications identical between these parts?

A: Yes. Both parts carry CE, CSA, KC, PSE, and UL approvals and are ROHS3 compliant. Regulatory compliance is equivalent.

Q: What is the difference between the 0318004.MXP and 0318004.HXP?

A: The parts are electrically and mechanically identical. The only difference is inventory availability: 0318004.MXP has 802 Pcs in stock, while 0318004.HXP has 1212 Pcs in stock.

Q: Will the 0318004.HXP fit in the same socket or holder as the 0318004.MXP?

A: Yes. Both parts have identical physical dimensions (0.275" Dia x 1.288" L / 6.99mm x 32.72mm) and the same 3AB, 3AG package configuration, ensuring mechanical compatibility with existing through-hole mounting hardware.

Q: Are there any temperature or environmental differences between these parts?

A: No. Both parts operate across the identical temperature range of -55°C ~ 125°C and have the same DC cold resistance specification (0.0293 Ohms).