Littelfuse 0314030.MX52LP Ceramic Fuse - Equivalent & Substitute Parts

Part Overview

The Littelfuse 0314030.MX52LP is a 30A 250VAC ceramic cartridge fuse with fast-blow response characteristics, designed for through-hole mounting in 3AB/3AG package format. This Active product is widely used in industrial and commercial electrical protection circuits. Substitute parts become necessary when specific mounting requirements, voltage ratings, or supply chain availability necessitate alternative configurations while maintaining equivalent electrical protection performance.

Substiute Parts

0314030.MX52LP

Littelfuse Inc.In Stock: 13250314030.MX52LP Datasheet

Current PartRFQ

0314030.HXP

Littelfuse Inc.In Stock: 40660314030.HXP Datasheet

Parametric EquivalentRFQ

0314030.MXP

Littelfuse Inc.In Stock: 33750314030.MXP Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 0314030.MX52LP is determined by the following critical parameters:

Primary Substitution Criteria:

• Current Rating: 30 A (exact match required)
• Voltage Rating - AC: 250 V (exact match required)
• Fuse Type: Cartridge, Ceramic (exact match required)
• Response Time: Fast Blow (exact match required)
• Package / Case: 3AB, 3AG, 1/4" x 1-1/4" (exact match required)
• Melting I²t: 2490 (exact match required)
• Operating Temperature Range: -55°C ~ 125°C (exact match required)

Secondary Compatibility Factors:

• Mounting Type: The main part specifies Through Hole mounting. Substitute parts with "Requires Holder" mounting are electrically equivalent but require holder installation for circuit integration.
• Voltage Rating - DC: The main part has no DC rating specification. Substitute parts with 125V DC rating provide extended functionality without affecting AC circuit performance.
• Breaking Capacity: Substitute parts with 400A DC breaking capacity exceed the main part's 100A AC specification, providing enhanced protection margins.

The two substitute parts (0314030.HXP and 0314030.MXP) are parametrically equivalent to the main part across all critical electrical and thermal parameters. Both maintain identical current, AC voltage, response time, and thermal characteristics. The primary difference is the mounting configuration and extended DC voltage capability.

Parameter Comparison

Engineering Selection Recommendations

All three parts (0314030.MX52LP, 0314030.HXP, and 0314030.MXP) are Active products from Littelfuse Inc. and maintain ROHS3 compliance with REACH Unaffected status.

Selection based on circuit integration requirements:

The 0314030.MX52LP is suitable for applications requiring direct through-hole PCB mounting without additional holder components. This configuration minimizes assembly complexity in designs with integrated fuse mounting provisions.

The 0314030.HXP and 0314030.MXP are suitable for applications utilizing separate fuse holders. Both parts are electrically identical and provide equivalent protection performance. Selection between these two substitute parts should be based on supply chain availability and inventory status, as they are parametrically equivalent.

The substitute parts' extended DC voltage rating (125V DC) provides additional functionality for dual-voltage applications without compromising AC circuit protection performance.

Regulatory compliance across all three parts includes CE, UL, and regional certifications (KC/METI for the main part; K-MARK/PSE for substitutes), supporting deployment in international markets.

Frequently Asked Questions (FAQ)

Q: Can 0314030.HXP or 0314030.MXP be used as direct replacements for 0314030.MX52LP?

A: Both substitute parts are electrically equivalent in terms of current rating, AC voltage, response time, and thermal characteristics. The primary difference is mounting configuration. The main part uses through-hole mounting, while substitutes require a separate fuse holder. If your circuit design accommodates holder-based installation, either substitute part provides equivalent protection.

Q: What is the difference between 0314030.HXP and 0314030.MXP?

A: Both parts are parametrically identical across all electrical and thermal parameters. They differ only in manufacturing batch or supply chain designation. Selection should be based on availability and inventory status.

Q: Does the 125V DC rating on substitute parts affect AC circuit operation?

A: No. The 125V DC rating on 0314030.HXP and 0314030.MXP is an additional capability that does not impact AC circuit performance. These parts maintain the same 250V AC rating and fast-blow response as the main part.

Q: Are all three parts ROHS3 compliant?

A: Yes. The main part 0314030.MX52LP and both substitute parts 0314030.HXP and 0314030.MXP are ROHS3 compliant with REACH Unaffected status.

Q: What certifications apply to each part?

A: The main part carries CE, KC, METI, and UL certifications. The substitute parts carry CE, K-MARK, PSE, and UL certifications. Both certification sets support international deployment, with regional variations reflecting different market requirements.

Q: Can these fuses be used in both AC and DC circuits?

A: The main part 0314030.MX52LP is rated for 250V AC only. The substitute parts 0314030.HXP and 0314030.MXP are rated for 250V AC and 125V DC, enabling use in dual-voltage applications.