Circuit Breaker Thermal Magnetic 8A 277V 65V - SCHURTER 4420.0775

Part Overview

The SCHURTER 4420.0775 is a thermal magnetic circuit breaker rated for 8A at 277V AC and 65V DC, designed for DIN rail mounting with lever actuation. This component is classified as obsolete, necessitating identification of equivalent substitute parts for ongoing system maintenance and new installations. The obsolete status requires engineers to evaluate active alternative models that maintain functional and electrical compatibility.

Substiute Parts

4420.0775

SCHURTER Inc.In Stock: 8424420.0775 Datasheet

Current PartRFQ

1019958

Phoenix ContactIn Stock: 10411019958 Datasheet

SimilarRFQ

GMB63H3PC8

Carlo Gavazzi Inc.In Stock: 885GMB63H3PC8 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the SCHURTER 4420.0775 are qualified based on the following critical parameters that determine functional equivalence:

• Current Rating: 8A (exact match required)
• Breaker Type: Thermal Magnetic (exact match required)
• Mounting Type: DIN Rail (exact match required)
• Actuator Type: Lever (exact match required)
• Number of Poles: 3 (exact match required)
• Voltage Rating - AC: 277V minimum (exact match or higher rating acceptable)
• Voltage Rating - DC: Compatibility with 65V DC operation

The identified substitute parts meet these core electrical and mechanical parameters, enabling direct functional replacement in applications designed for the original SCHURTER component.

Parameter Comparison

Engineering Selection Recommendations

Phoenix Contact 1019958 is the primary substitute for the SCHURTER 4420.0775. This part maintains exact electrical specifications (8A, 277V AC) and mechanical configuration (3-pole, lever-actuated, DIN rail mount). The Phoenix Contact component carries active product status with RoHS compliance, ensuring long-term availability and regulatory alignment.

Carlo Gavazzi GMB63H3PC8 serves as an alternative substitute with higher AC voltage rating (480V). This part is suitable for applications where the 277V AC specification is not a limiting constraint, as the higher voltage rating provides operational margin. The Carlo Gavazzi component is active and ROHS3 compliant.

Both substitute parts are thermally and magnetically equivalent to the original SCHURTER breaker, supporting identical trip characteristics and protection functions in 3-pole circuit protection applications.

Frequently Asked Questions (FAQ)

Q: Can the Phoenix Contact 1019958 directly replace the SCHURTER 4420.0775?

A: Yes. Both components share identical current rating (8A), voltage rating (277V AC), pole configuration (3-pole), actuator type (lever), and mounting method (DIN rail). The Phoenix Contact part is functionally equivalent for direct substitution.

Q: What is the difference between the Phoenix Contact and Carlo Gavazzi substitutes?

A: The primary difference is AC voltage rating. The Phoenix Contact 1019958 matches the original 277V AC specification exactly. The Carlo Gavazzi GMB63H3PC8 has a higher 480V AC rating. Both maintain the 8A current rating and 3-pole thermal magnetic configuration. Selection depends on whether the application requires exact voltage matching or can accommodate higher voltage-rated components.

Q: Is the Carlo Gavazzi GMB63H3PC8 suitable for 277V AC applications?

A: Yes. A component rated for 480V AC can operate safely at 277V AC. The higher voltage rating does not restrict operation at lower voltages within the component's design parameters.

Q: What is the significance of the obsolete status for the SCHURTER 4420.0775?

A: Obsolete status indicates the manufacturer no longer produces this part. Existing inventory may be limited. Substitution with active products (Phoenix Contact 1019958 or Carlo Gavazzi GMB63H3PC8) ensures continued availability for maintenance and new installations.

Q: Are there packaging differences between these parts?

A: The SCHURTER 4420.0775 packaging is listed as undefined. Both substitute parts are supplied in box packaging, which is standard for DIN rail circuit breakers.