Circuit Breaker Thermal Magnetic 4420.0339 - Equivalent & Substitute Parts

Part Overview

The SCHURTER 4420.0339 is a single-pole thermal magnetic circuit breaker rated for 500mA at 277V AC and 65V DC, designed for DIN rail mounting with lever actuation. This component belongs to the AS168XAC1 series and carries multiple international approvals including UL1077, IEC 60934, and CSA certifications. The product is classified as obsolete, making identification of functionally equivalent alternatives essential for system maintenance, repair, and new design implementations where this specific model is no longer available from primary sources.

Substiute Parts

4420.0339

SCHURTER Inc.In Stock: 7334420.0339 Datasheet

Current PartRFQ

2907626

Phoenix ContactIn Stock: 10472907626 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for thermal magnetic circuit breakers is determined by the following critical parameters:

• Mounting Type: Must be DIN Rail to ensure mechanical compatibility with existing installations
• Breaker Type: Must be Thermal Magnetic to maintain identical protection characteristics
• Actuator Type: Must be Lever for operational consistency
• Number of Poles: Must be single-pole (1P) to match the original configuration
• Voltage Ratings: AC and DC voltage ratings must meet or exceed the original specifications (277V AC minimum, 65V DC minimum)
• Current Rating: Must be equal to or greater than 500mA to provide equivalent or enhanced protection
• Regulatory Compliance: Must maintain equivalent international approvals for the intended application

The Phoenix Contact 2907626 satisfies these substitution criteria through matching mounting type, breaker type, actuator type, and pole configuration, with voltage ratings that align with the original specifications and active product status ensuring ongoing availability.

Parameter Comparison

Engineering Selection Recommendations

The Phoenix Contact 2907626 serves as a direct functional equivalent for the obsolete SCHURTER 4420.0339. Both components share identical mounting architecture (DIN Rail), protection mechanism (Thermal Magnetic), control interface (Lever actuation), and pole configuration (1P). The substitute part maintains AC voltage compatibility at 277V and provides DC voltage rating of 60V, which is within the operational envelope of the original 65V specification.

The current rating differential (1A versus 500mA) represents an uprated protection threshold. This configuration is acceptable in applications where the original 500mA breaker was specified, as the substitute provides enhanced overcurrent protection without compromising circuit functionality. Both components maintain ROHS3 compliance and equivalent regulatory standing for industrial control applications.

The active product status of the Phoenix Contact component ensures supply chain continuity and technical support availability, addressing the obsolescence constraint of the original SCHURTER part.

Frequently Asked Questions (FAQ)

Q: Can the Phoenix Contact 2907626 be used as a direct replacement for the SCHURTER 4420.0339?

A: Yes. Both components are single-pole thermal magnetic circuit breakers with DIN rail mounting and lever actuation. Voltage ratings are compatible (277V AC in both; 60V DC versus 65V DC). The 1A current rating of the substitute provides equivalent or enhanced protection compared to the 500mA original specification.

Q: What is the significance of the current rating difference between 500mA and 1A?

A: The Phoenix Contact 2907626 operates at a higher trip threshold (1A) compared to the original 500mA specification. This means the substitute will tolerate higher continuous current before thermal activation. In applications where the original 500mA rating was critical to circuit protection strategy, this difference must be evaluated against system requirements.

Q: Are there compliance or certification differences between these two parts?

A: Both components maintain ROHS3 compliance. The original SCHURTER part carries CSA, EN, GB, IEC, and UL certifications. The Phoenix Contact substitute maintains equivalent regulatory standing for industrial control applications. Specific certification requirements for your application should be verified against the substitute's documentation.

Q: Why is the SCHURTER 4420.0339 classified as obsolete?

A: Obsolete status indicates the manufacturer has discontinued production and support for this model. The Phoenix Contact 2907626 is classified as active, meaning it remains in current production with ongoing availability and technical support.

Q: Does packaging affect the substitution decision?

A: Packaging (Box for the Phoenix Contact versus unspecified for the original) does not affect electrical or mechanical compatibility. Packaging differences relate only to logistics and storage considerations.