Littelfuse 0318.100H Glass Cartridge Fuse Equivalent & Substitute Parts

Part Overview

The Littelfuse 0318.100H is a 100 mA, 250 V AC/DC fast-blow glass cartridge fuse in 3AB/3AG package format (1/4" x 1-1/4" axial). This component is classified as obsolete product status. Equivalent and substitute parts are necessary to maintain circuit protection functionality in applications where the original part is no longer readily available or where design updates require active product alternatives with enhanced compliance certifications.

Substiute Parts

0318.100H

Littelfuse Inc.In Stock: 12200318.100H Datasheet

Current PartRFQ

0318.100HXP

Littelfuse Inc.In Stock: 9660318.100HXP Datasheet

DirectRFQ

0318.100MXP

Littelfuse Inc.In Stock: 10980318.100MXP Datasheet

Parametric EquivalentRFQ

0318.100VXP

Littelfuse Inc.In Stock: 10020318.100VXP Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 0318.100H are qualified based on strict electrical and mechanical parameter matching:

Critical Parameters for Substitution:

• Current Rating: 100 mA (exact match required)
• Voltage Rating (AC): 250 V (exact match required)
• Response Time: Fast Blow (exact match required)
• Package / Case: 3AB, 3AG, 1/4" x 1-1/4" (Axial) (exact match required)
• Fuse Type: Cartridge, Glass (exact match required)
• Breaking Capacity @ Rated Voltage: 35 A (exact match required)
• Melting I²t: 0.00102 (exact match required)
• Size / Dimension: 0.275" Dia x 1.288" L (6.99mm x 32.72mm) (exact match required)

All substitute parts listed below meet these critical parameters and are therefore electrically and mechanically interchangeable with the 0318.100H.

Parameter Comparison

Engineering Selection Recommendations

All three substitute parts (0318.100HXP, 0318.100MXP, 0318.100VXP) are direct functional equivalents to the 0318.100H based on identical electrical and mechanical parameters. The primary distinction between the main part and substitutes is product status and regulatory compliance.

The 0318.100H is classified as obsolete. The substitute parts 0318.100HXP, 0318.100MXP, and 0318.100VXP are all active products with current manufacturing support. All three substitutes carry enhanced regulatory certifications including CE marking in addition to CSA and UL approvals. All substitute parts are ROHS3 compliant and REACH unaffected, whereas the original 0318.100H is RoHS non-compliant.

For new designs or component replenishment, selection from the active substitute parts ensures compliance with current regulatory requirements and access to ongoing manufacturer support.

Frequently Asked Questions (FAQ)

Q: Are the substitute parts electrically identical to the 0318.100H?

A: Yes. The substitute parts 0318.100HXP, 0318.100MXP, and 0318.100VXP share identical electrical parameters with the 0318.100H: 100 mA current rating, 250 V AC voltage rating, fast-blow response time, 35 A breaking capacity, and 0.00102 melting I²t value.

Q: Are the substitute parts mechanically compatible with the 0318.100H?

A: Yes. All substitute parts use the identical 3AB/3AG package format with 1/4" x 1-1/4" (6.99mm x 32.72mm) axial dimensions. Direct mechanical substitution is possible without circuit board or holder modifications.

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

A: The three substitute parts (0318.100HXP, 0318.100MXP, 0318.100VXP) are parametrically equivalent. All meet identical electrical and mechanical specifications. Differences are limited to packaging format (all bulk) and inventory availability. Selection between them is based on procurement and supply chain considerations rather than technical performance.

Q: Why is the 0318.100H classified as obsolete?

A: The 0318.100H is no longer in active production. The active substitute parts provide equivalent functionality with current manufacturing support and enhanced regulatory compliance certifications.

Q: Can I use these substitute parts in existing applications designed for the 0318.100H?

A: Yes. The substitute parts are direct functional and mechanical equivalents. No circuit modifications or holder changes are required for substitution.

Q: What regulatory certifications do the substitute parts carry?

A: All substitute parts carry CE, CSA, and UL approvals. All are ROHS3 compliant and REACH unaffected. The original 0318.100H carries only CSA and UL approvals and is RoHS non-compliant.

Q: Is there a difference in DC cold resistance between the main part and substitutes?

A: The 0318.100H has a DC cold resistance of 11.2 Ohms, while all substitute parts measure 11.28 Ohms. This minor variation (0.08 Ohms) is within normal manufacturing tolerance and does not affect functional equivalence.