SCHURTER 4420.0449 Circuit Breaker Thermal Magnetic 25A 277V 65V DIN Rail

Part Overview

The SCHURTER 4420.0449 is a thermal magnetic circuit breaker rated for 25A at 277V AC and 65V DC, designed for DIN rail mounting with lever actuation and 2-pole configuration. This component is classified as obsolete, necessitating identification of equivalent substitute parts for ongoing system maintenance and new installations. Substitute parts must maintain identical current ratings, mounting type, actuator configuration, and pole count while accommodating different voltage specifications based on application requirements.

Substiute Parts

4420.0449

SCHURTER Inc.In Stock: 9084420.0449 Datasheet

Current PartRFQ

4420.024

SCHURTER Inc.In Stock: 9264420.024 Datasheet

DirectRFQ

1020008

Phoenix ContactIn Stock: 8421020008 Datasheet

SimilarRFQ

2907666

Phoenix ContactIn Stock: 12662907666 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility is determined by strict equivalence in the following parameters: current rating (25A), mounting type (DIN Rail), actuator type (Lever), and number of poles (2). Voltage ratings may vary based on application requirements. The substitute parts are grouped as follows:

Direct Manufacturer Substitute (SCHURTER Series):

• Part 4420.024: Same manufacturer, same current rating, same mounting and actuator configuration. Voltage rating differs at 480V AC (versus 277V AC) and maintains 65V DC rating.

Similar Manufacturer Substitutes (Phoenix Contact Series):

• Part 1020008 (TMC 7 Series): Equivalent current, mounting, and actuator specifications. Voltage rating 277V AC (matching main part) with elevated DC rating of 125V.
• Part 2907666 (TMC 8 Series): Equivalent current, mounting, and actuator specifications. Voltage rating 480V AC with elevated DC rating of 125V.

All substitute parts maintain thermal magnetic breaker type, 2-pole configuration, and DIN rail mounting required for direct functional replacement.

Parameter Comparison

Engineering Selection Recommendations

For 277V AC Applications: Select part 1020008 (Phoenix Contact TMC 7 Series) as the primary substitute. This part maintains the 277V AC voltage specification of the original component while providing active product status and higher DC voltage capability (125V versus 65V). ROHS3 compliance and MSL 1 rating ensure environmental and handling compatibility.

For 480V AC Applications: Select part 2907666 (Phoenix Contact TMC 8 Series) as the primary substitute. This part accommodates higher AC voltage requirements while maintaining 25A current rating and DIN rail mounting. Active product status and ROHS3 compliance support long-term availability and regulatory requirements.

Alternative Within SCHURTER Manufacturer Line: Part 4420.024 remains available as a direct manufacturer substitute for 480V AC applications, maintaining series continuity within the SCHURTER product family. However, both Phoenix Contact alternatives offer active product status, providing superior long-term supply chain stability compared to obsolete SCHURTER components.

Frequently Asked Questions (FAQ)

Q: Can part 4420.024 replace 4420.0449 in all applications? A: Part 4420.024 is suitable only for applications requiring 480V AC operation. The original 4420.0449 is specified for 277V AC systems. For 277V AC applications, use part 1020008 instead.

Q: What is the significance of the DC voltage rating difference between the main part (65V) and substitutes (125V)? A: The substitute parts feature elevated DC voltage ratings (125V) compared to the original (65V). This provides enhanced capability for DC circuit protection and does not create incompatibility in applications designed for the original 65V rating. The higher rating ensures the substitute functions safely across a broader range of DC operating conditions.

Q: Are Phoenix Contact parts 1020008 and 2907666 direct equivalents to the SCHURTER 4420.0449? A: Both Phoenix Contact parts are functionally equivalent in current rating (25A), mounting type (DIN Rail), actuator configuration (Lever), and pole count (2). They differ in AC voltage specification and manufacturer. Part 1020008 matches the 277V AC specification; part 2907666 accommodates 480V AC applications.

Q: Why should I select an active product over an obsolete part? A: Active products ensure ongoing availability, supply chain stability, and manufacturer support. Phoenix Contact parts 1020008 and 2907666 carry active status, whereas SCHURTER 4420.0449 and 4420.024 are obsolete. Active parts reduce procurement risk for future replacements and maintenance cycles.

Q: Are all substitute parts ROHS3 compliant? A: Yes. The main part 4420.0449 and all substitute parts (4420.024, 1020008, 2907666) are ROHS3 compliant, ensuring compatibility with environmental and regulatory requirements across applications.

Q: What packaging options are available for these parts? A: Part 4420.0449 is supplied in standard packaging. Part 4420.024 is available in Bulk packaging. Phoenix Contact parts 1020008 and 2907666 are supplied in Box packaging. Packaging selection does not affect functional compatibility; it addresses logistics and inventory management requirements.