Littelfuse 031801.5VXP Glass Cartridge Fuse Equivalent & Substitute Parts

Part Overview

The Littelfuse 031801.5VXP is a 1.5 A, 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 is widely used in circuit protection applications requiring fast response characteristics. Substitute parts are identified when equivalent electrical and mechanical parameters are maintained across the same product series, ensuring direct interchangeability in circuit protection designs.

Substiute Parts

031801.5VXP

Littelfuse Inc.In Stock: 1139031801.5VXP Datasheet

Current PartRFQ

031801.5HXP

Littelfuse Inc.In Stock: 1343031801.5HXP Datasheet

Parametric EquivalentRFQ

031801.5MXP

Littelfuse Inc.In Stock: 1788031801.5MXP Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the Littelfuse 031801.5VXP are identified based on strict equivalence of the following critical parameters:

• Current Rating: 1.5 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: 100 A
• Melting I²t: 2.35
• Operating Temperature Range: -55°C ~ 125°C
• DC Cold Resistance: 0.1036 Ohms
• Approval Agencies: CE, CSA, PSE, UL
• RoHS Status: ROHS3 Compliant

All substitute parts maintain identical electrical and mechanical specifications, ensuring direct interchangeability in circuit protection applications without design modification.

Parameter Comparison

Engineering Selection Recommendations

All three parts—031801.5VXP, 031801.5HXP, and 031801.5MXP—are classified as Active product status and carry identical compliance certifications (CE, CSA, PSE, UL) with ROHS3 compliance. Selection between these parts is based on inventory availability and supply chain considerations rather than technical differentiation. Each part is suitable for direct substitution in circuit protection applications requiring 1.5 A, 250 V AC/DC fast-blow glass cartridge fuses with 3AB/3AG package configuration.

Frequently Asked Questions (FAQ)

Q: Can 031801.5HXP and 031801.5MXP be used interchangeably with 031801.5VXP?

A: Yes. All three parts maintain identical electrical ratings (1.5 A, 250 V AC/DC), response characteristics (fast-blow), mechanical dimensions (0.275" Dia x 1.288" L), and approval certifications. Direct substitution is supported without circuit modification.

Q: What determines substitution eligibility for this fuse series?

A: Substitution is determined by equivalence in current rating, voltage rating, response time, package configuration, breaking capacity, melting I²t, operating temperature range, and regulatory compliance. All substitute parts listed maintain these parameters identically.

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

A: No. All parts use identical 3AB/3AG package configuration with 1/4" x 1-1/4" (Axial) dimensions and through-hole mounting type.

Q: What is the significance of the melting I²t value?

A: The melting I²t value of 2.35 defines the thermal energy required to melt the fuse element. Identical I²t values across all listed parts ensure consistent response behavior and protection characteristics in the circuit.

Q: Are all parts RoHS compliant?

A: Yes. All listed parts are ROHS3 compliant and carry identical regulatory approvals (CE, CSA, PSE, UL).