Circuit Breaker Thermal Magnetic 4420.0371 - Equivalent & Substitute Parts

Part Overview

The SCHURTER 4420.0371 is a thermal magnetic circuit breaker rated for 20A at 480V AC and 65V DC, designed for DIN rail mounting with lever actuation. This component belongs to the AS168XAC2 series and is currently classified as obsolete. Due to its discontinued status, identifying equivalent substitute parts is essential for system maintenance, repair, and replacement applications where the original component is no longer available from the manufacturer.

Substiute Parts

4420.0371

SCHURTER Inc.In Stock: 8494420.0371 Datasheet

Current PartRFQ

2G20UM

Altech CorporationIn Stock: 11942G20UM Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SCHURTER 4420.0371 is determined by matching the following critical parameters:

• Breaker Type: Thermal Magnetic construction
• Current Rating: 20A nominal
• Voltage Rating - AC: 480V minimum
• Voltage Rating - DC: Minimum 65V (higher ratings are acceptable)
• Mounting Type: DIN Rail
• Actuator Type: Lever
• Number of Poles: 2-pole configuration
• Regulatory Compliance: Relevant certifications for the application

The Altech Corporation 2G20UM meets these substitution criteria with compatible electrical and mechanical specifications.

Parameter Comparison

Engineering Selection Recommendations

The Altech 2G20UM is a direct functional equivalent for the obsolete SCHURTER 4420.0371. Both components share identical current ratings, AC voltage ratings, mounting configurations, and pole counts. The DC voltage rating of the Altech part (80V) exceeds the original specification (65V), providing additional operational margin without compromising compatibility.

Both parts maintain ROHS3 compliance and REACH unaffected status, ensuring regulatory alignment. The Altech 2G20UM holds active product status with established supply availability, making it the appropriate choice for replacement applications. Certification coverage through UL508 and CSA standards supports use in industrial control and distribution systems.

Frequently Asked Questions (FAQ)

Q: Can the Altech 2G20UM directly replace the SCHURTER 4420.0371?

A: Yes. Both components are 20A thermal magnetic circuit breakers with 480V AC ratings, 2-pole lever-actuated configurations, and DIN rail mounting. The higher DC voltage rating of the Altech part (80V vs. 65V) is compatible with the original application.

Q: What is the significance of the higher DC voltage rating on the substitute part?

A: A higher DC voltage rating indicates the component can safely operate across a broader voltage range. This does not affect compatibility when used in applications originally specified for 65V DC.

Q: Are both parts certified for the same applications?

A: Both parts carry UL508 and CSA certifications. The SCHURTER part includes additional certifications (EN 60934, IEC 60934, UL1077, GB 17701). Application requirements should be verified against the specific certifications needed for your system.

Q: Why is the SCHURTER 4420.0371 listed as obsolete?

A: Obsolete status indicates the manufacturer has discontinued production. The Altech 2G20UM remains in active production and is available for new installations and replacements.

Q: Are there packaging differences between these parts?

A: The SCHURTER part is packaged as individual units, while the Altech part is supplied in bulk packaging. This does not affect electrical or mechanical compatibility.