Littelfuse 0318.150H Glass Cartridge Fuse Equivalent & Substitute Parts

Part Overview

The Littelfuse 0318.150H is a 150 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 available through standard distribution channels.

Substiute Parts

0318.150H

LittelfuseIn Stock: 11360318.150H Datasheet

Current PartRFQ

0318.150HXP

Littelfuse Inc.In Stock: 10760318.150HXP Datasheet

DirectRFQ

0318.150MXP

Littelfuse Inc.In Stock: 9960318.150MXP Datasheet

Parametric EquivalentRFQ

0318.150VXP

Littelfuse Inc.In Stock: 8590318.150VXP Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the Littelfuse 0318.150H is determined by strict equivalence across the following electrical and mechanical parameters:

• Current Rating: 150 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)
• Mounting Type: Through Hole (exact match required)
• Breaking Capacity @ Rated Voltage: 35A (exact match required)
• Melting I²t: 0.0055 (exact match required)

All substitute parts listed below meet these criteria and are manufactured by Littelfuse Inc. as direct equivalents within the 318 series.

Parameter Comparison

Engineering Selection Recommendations

The Littelfuse 0318.150H is obsolete and no longer in active production. All three substitute parts—0318.150HXP, 0318.150MXP, and 0318.150VXP—are active products manufactured by Littelfuse Inc. and provide direct electrical and mechanical equivalence.

The substitute parts offer enhanced compliance status compared to the original part. All three substitutes carry CE, CSA, and UL certifications, whereas the original part carries only CSA and UL certifications. All substitute parts are ROHS3 compliant, while the original part is RoHS non-compliant. All substitute parts include specified operating temperature range (-55°C ~ 125°C), which is not specified for the original part.

DC cold resistance values for the substitute parts (5.13 Ohms) are marginally higher than the original part (5.1 Ohms), representing a 0.59% variance within acceptable engineering tolerance for this component category.

Frequently Asked Questions (FAQ)

Q: Can 0318.150HXP, 0318.150MXP, and 0318.150VXP be used interchangeably with 0318.150H?

A: Yes. All three substitute parts meet the electrical and mechanical specifications required for direct substitution. Current rating, voltage rating, response time, package format, breaking capacity, and melting I²t are identical across all parts.

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

A: The three substitute parts (0318.150HXP, 0318.150MXP, 0318.150VXP) are parametrically equivalent. Differences exist only in packaging designation and internal manufacturing specifications not reflected in the provided technical parameters. All three are functionally identical for circuit protection applications.

Q: Are the substitute parts physically compatible with the original part's mounting footprint?

A: Yes. All substitute parts use the identical 3AB/3AG package format with dimensions of 0.275" diameter x 1.288" length (6.99mm x 32.72mm). Through-hole mounting compatibility is maintained.

Q: What certifications do the substitute parts carry?

A: The substitute parts carry CE, CSA, and UL certifications. The original part carries CSA and UL certifications. All substitute parts are ROHS3 compliant.

Q: Is there a difference in DC cold resistance between the original and substitute parts?

A: The substitute parts have a DC cold resistance of 5.13 Ohms compared to 5.1 Ohms for the original part. This represents a 0.59% variance and does not affect circuit protection performance.

Q: What is the operating temperature range for these fuses?

A: The substitute parts operate across -55°C to 125°C. The original part does not specify an operating temperature range in the provided documentation.