Circuit Breaker Thermal Magnetic 20A 277V 65V (SCHURTER 4420.0485)

Part Overview

The SCHURTER 4420.0485 is a single-pole thermal magnetic circuit breaker rated for 20A at 277V AC and 65V DC, designed for DIN rail mounting with lever actuation. This component is classified as obsolete, making equivalent substitutes necessary for ongoing system maintenance and new installations where this specific model is no longer available from primary sources.

Substiute Parts

4420.0485

SCHURTER Inc.In Stock: 8404420.0485 Datasheet

Current PartRFQ

4420.0262

SCHURTER Inc.In Stock: 8374420.0262 Datasheet

Parametric EquivalentRFQ

2907573

Phoenix ContactIn Stock: 12602907573 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the SCHURTER 4420.0485 is determined by strict equivalence across the following critical parameters:

• Current Rating: 20A (exact match required)
• Voltage Rating - AC: 277V (exact match required)
• Mounting Type: DIN Rail (exact match required)
• Breaker Type: Thermal Magnetic (exact match required)
• Number of Poles: 1 (exact match required)
• Actuator Type: Lever (exact match required)

The substitute parts are grouped into two categories:

Parametric Equivalent: SCHURTER 4420.0262 maintains identical electrical and mechanical specifications, differing only in packaging format (Bulk vs. standard packaging).

Similar Substitute: Phoenix Contact 2907573 provides functional equivalence with a minor voltage rating variance on the DC side (60V DC versus 65V DC), while maintaining all other critical parameters.

Parameter Comparison

Engineering Selection Recommendations

SCHURTER 4420.0262 is the primary substitute for direct replacement. As a parametric equivalent from the same manufacturer and series (AS168XAC1), it provides identical electrical performance and mechanical compatibility. Both parts carry equivalent regulatory approvals (CSA C22.2 No 14, CSA C22.2 No 235, EN 60934, GB 17701, IEC 60934, UL1077, UL508) and maintain ROHS3 compliance. The only distinction is packaging format.

Phoenix Contact 2907573 serves as an alternative when SCHURTER equivalents are unavailable. This part maintains all critical electrical and mechanical parameters with the exception of DC voltage rating (60V versus 65V). The Phoenix Contact component carries active product status, ensuring ongoing availability and supply chain continuity. It meets identical RoHS and REACH compliance requirements.

Frequently Asked Questions (FAQ)

Q: Can SCHURTER 4420.0262 be used as a direct replacement for SCHURTER 4420.0485?

A: Yes. Both parts are parametric equivalents with identical electrical ratings (20A, 277V AC, 65V DC), breaker type (thermal magnetic), mounting configuration (DIN rail), and pole count (1). The difference is packaging only.

Q: What is the significance of the DC voltage difference between the SCHURTER and Phoenix Contact parts?

A: The SCHURTER 4420.0485 and 4420.0262 are rated for 65V DC, while the Phoenix Contact 2907573 is rated for 60V DC. This 5V difference represents the maximum DC voltage at which the breaker will operate within specification. Selection depends on the actual DC voltage present in the application circuit.

Q: Why is the SCHURTER 4420.0485 listed as obsolete?

A: Obsolete status indicates the manufacturer has discontinued production. The SCHURTER 4420.0262 is also obsolete, making the Phoenix Contact 2907573 the recommended long-term supply source due to its active product status.

Q: Are all three parts certified to the same standards?

A: The SCHURTER parts (4420.0485 and 4420.0262) carry identical certifications: CSA C22.2 No 14, CSA C22.2 No 235, EN 60934, GB 17701, IEC 60934, UL1077, and UL508. The Phoenix Contact 2907573 carries RoHS3 and REACH compliance but specific approval agency certifications are not provided in the available data.

Q: What packaging formats are available?

A: SCHURTER 4420.0485 is supplied in standard packaging, SCHURTER 4420.0262 in bulk packaging, and Phoenix Contact 2907573 in box packaging. Packaging selection should align with procurement and inventory management requirements.