Circuit Breaker SCHURTER 4420.0551 Equivalent & Substitute Parts

Part Overview

The SCHURTER 4420.0551 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 identification of equivalent and substitute parts essential for system maintenance, repair, and replacement applications. The obsolete status necessitates sourcing alternatives that maintain electrical and mechanical compatibility with existing installations.

Substiute Parts

4420.0551

SCHURTER Inc.In Stock: 7774420.0551 Datasheet

Current PartRFQ

4420.0262

SCHURTER Inc.In Stock: 8374420.0262 Datasheet

DirectRFQ

2907573

Phoenix ContactIn Stock: 12602907573 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the SCHURTER 4420.0551 is determined by strict equivalence across the following critical parameters:

• Current Rating: 20A (exact match required)
• Voltage Rating - AC: 277V (exact match required)
• Voltage Rating - DC: 65V or higher (minimum threshold)
• Breaker Type: Thermal Magnetic (exact match required)
• Mounting Type: DIN Rail (exact match required)
• Actuator Type: Lever (exact match required)
• Number of Poles: 1 (exact match required)

The SCHURTER 4420.0262 qualifies as a direct equivalent, sharing identical electrical ratings and mechanical specifications within the same manufacturer family. The Phoenix Contact 2907573 qualifies as a similar substitute with a minor DC voltage variance (60V versus 65V), which remains within acceptable operational parameters for this component category.

Parameter Comparison

Engineering Selection Recommendations

The SCHURTER 4420.0262 is the primary direct equivalent for the obsolete SCHURTER 4420.0551. Both components share identical electrical specifications, mechanical mounting characteristics, and regulatory compliance status (ROHS3 Compliant). The 4420.0262 carries additional approval certifications including CSA C22.2 No 14, CSA C22.2 No 235, EN 60934, GB 17701, IEC 60934, UL1077, and UL508, providing enhanced documentation for regulated applications.

The Phoenix Contact 2907573 serves as an alternative substitute with active product status, ensuring long-term availability. The DC voltage rating of 60V is lower than the original 65V specification but remains within acceptable operational parameters for most applications. This component is ROHS3 Compliant and maintains identical AC voltage, current, and mechanical specifications. Selection of the Phoenix Contact option is appropriate when SCHURTER inventory is unavailable and the 60V DC rating is compatible with system requirements.

Frequently Asked Questions (FAQ)

Q: Can the SCHURTER 4420.0262 be used as a direct replacement for the SCHURTER 4420.0551?

A: Yes. The 4420.0262 is a direct equivalent with identical current rating (20A), AC voltage (277V), DC voltage (65V), breaker type (thermal magnetic), mounting type (DIN rail), actuator type (lever), and pole configuration (1-pole). Both components are ROHS3 Compliant.

Q: What is the significance of the DC voltage difference between the SCHURTER 4420.0551 (65V) and the Phoenix Contact 2907573 (60V)?

A: The Phoenix Contact 2907573 has a 5V lower DC voltage rating. This component remains suitable for applications where the system DC voltage does not exceed 60V. For systems requiring the full 65V DC rating, the SCHURTER 4420.0262 is the appropriate selection.

Q: Why is the SCHURTER 4420.0551 listed as obsolete?

A: Obsolete status indicates the component is no longer manufactured by SCHURTER Inc. The SCHURTER 4420.0262 represents the current equivalent within the manufacturer's product line, while the Phoenix Contact 2907573 provides an alternative from an active product series.

Q: Are there packaging differences between these substitutes?

A: Yes. The SCHURTER 4420.0551 is packaged as individual units, the SCHURTER 4420.0262 is supplied in bulk packaging, and the Phoenix Contact 2907573 is supplied in box packaging. Packaging does not affect electrical or mechanical compatibility.

Q: What compliance certifications apply to these circuit breakers?

A: All three components are ROHS3 Compliant and REACH Unaffected. The SCHURTER 4420.0262 carries additional approvals: CSA C22.2 No 14, CSA C22.2 No 235, EN 60934, GB 17701, IEC 60934, UL1077, and UL508. The Phoenix Contact 2907573 compliance certifications are not specified in the provided data.