Littelfuse 0314.750M Ceramic Fuse Cartridge - Equivalent & Substitute Parts

Part Overview

The Littelfuse 0314.750M is a 750 mA ceramic fuse cartridge rated for 250 V AC and 125 V DC operation. This component is classified as obsolete, which necessitates identification of active equivalent alternatives for continued system support and procurement. The fuse is designed for fast-blow response characteristics and requires a compatible holder (3AB, 3AG format, 1/4" x 1-1/4").

Substiute Parts

0314.750M

Littelfuse Inc.In Stock: 9990314.750M Datasheet

Current PartRFQ

0314.750MXP

Littelfuse Inc.In Stock: 26360314.750MXP Datasheet

DirectRFQ

0314.750HXP

Littelfuse Inc.In Stock: 9840314.750HXP Datasheet

Parametric EquivalentRFQ

0314.750VXP

Littelfuse Inc.In Stock: 11500314.750VXP Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the obsolete 0314.750M is determined by strict equivalence across the following electrical and mechanical parameters:

• Current Rating: 750 mA (exact match required)
• Voltage Rating - AC: 250 V (exact match required)
• Voltage Rating - DC: 125 V (exact match required)
• Response Time: Fast Blow (exact match required)
• Package / Case: 3AB, 3AG, 1/4" x 1-1/4" (exact match required)
• Size / Dimension: 0.250" Dia x 1.250" L (exact match required)
• Breaking Capacity @ Rated Voltage: 35A AC, 10kA DC (exact match required)
• Melting I²t: 0.466 (exact match required)
• DC Cold Resistance: 0.25 Ohms (exact match required)
• Operating Temperature: -55°C ~ 125°C (exact match required)

All three substitute parts (0314.750MXP, 0314.750HXP, 0314.750VXP) meet these criteria and are classified as active products within the Littelfuse 314 series.

Parameter Comparison

Engineering Selection Recommendations

All three substitute parts (0314.750MXP, 0314.750HXP, 0314.750VXP) provide direct functional equivalence to the obsolete 0314.750M across all electrical and mechanical parameters. The primary differentiators are product status and regulatory compliance:

The 0314.750M is obsolete and carries RoHS non-compliant status with CSA and UL approvals. All substitute parts are active products with ROHS3 compliance and expanded certification including CE, CSA, and UL approvals. The substitute parts are available in bulk packaging, whereas the original part was supplied in standard packaging.

Selection among the three active substitutes should be based on procurement availability and packaging requirements, as all three are electrically and mechanically identical.

Frequently Asked Questions (FAQ)

Q: Can the 0314.750MXP, 0314.750HXP, or 0314.750VXP be used as direct replacements for the 0314.750M?

A: Yes. All three substitute parts are electrically and mechanically equivalent to the 0314.750M. They maintain identical current ratings (750 mA), voltage ratings (250 V AC, 125 V DC), response characteristics (fast blow), physical dimensions (0.250" Dia x 1.250" L), and breaking capacity (35A AC, 10kA DC).

Q: What is the difference between the three substitute parts?

A: The 0314.750MXP, 0314.750HXP, and 0314.750VXP are parametrically identical. All are active products with ROHS3 compliance and CE, CSA, UL certifications. Differences are limited to internal manufacturing variants and packaging configurations. Selection should be based on supplier availability.

Q: Is the 0314.750M still available for purchase?

A: The 0314.750M is classified as obsolete. Active substitutes should be used for new procurement and system support.

Q: Are the substitute parts compatible with existing fuse holders designed for the 0314.750M?

A: Yes. All substitute parts maintain the same package specification (3AB, 3AG, 1/4" x 1-1/4") and physical dimensions (0.250" Dia x 1.250" L), ensuring compatibility with existing holder assemblies.

Q: What is the significance of ROHS3 compliance on the substitute parts?

A: ROHS3 compliance indicates that the substitute parts meet current Restriction of Hazardous Substances regulations, whereas the original 0314.750M is RoHS non-compliant. This is relevant for applications subject to environmental and regulatory requirements.

Q: Do the substitute parts have the same thermal and electrical characteristics?

A: Yes. The substitute parts maintain identical operating temperature range (-55°C ~ 125°C), DC cold resistance (0.25 Ohms), melting I²t (0.466), and all other thermal and electrical parameters specified for the 0314.750M.