Circuit Breaker Thermal Magnetic 4A 4420.0638

Part Overview

The SCHURTER 4420.0638 is a single-pole thermal magnetic circuit breaker rated for 4A at 180 V DC with lever actuation and DIN rail mounting. This component is classified as obsolete, making substitute parts necessary for new designs and ongoing system maintenance. The breaker provides overcurrent and short-circuit protection in DC applications requiring CSA, EN, GB, IEC, and UL certifications.

Substiute Parts

4420.0638

SCHURTER Inc.In Stock: 10714420.0638 Datasheet

Current PartRFQ

1C4UL

Altech CorporationIn Stock: 8061C4UL Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the 4420.0638 is based on the following critical parameters that must align for functional equivalence:

• Current Rating: 4A (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: 1 (exact match required)
• Voltage Rating: DC or AC/DC rated at or above 180 V
• Approval Certifications: UL and CSA compliance for safety-critical applications

The Altech Corporation 1C4UL meets these substitution criteria with matching current rating, breaker type, mounting configuration, and pole count. While the voltage rating differs (277 V AC versus 180 V DC), the 1C4UL is rated for both AC and DC operation, providing compatibility in DC applications at 180 V and below.

Parameter Comparison

Engineering Selection Recommendations

The Altech 1C4UL is an active product with current manufacturing support, addressing the obsolescence of the SCHURTER 4420.0638. Both components share identical electrical and mechanical specifications for the critical parameters: 4A current rating, thermal magnetic protection, single-pole configuration, and lever-actuated DIN rail mounting.

The 1C4UL carries cULus and UL489 certifications, providing UL compliance for North American applications. The SCHURTER part includes additional international certifications (EN 60934, GB 17701, IEC 60934). For applications requiring specific regional compliance beyond UL/CSA, verify that the 1C4UL certifications satisfy local regulatory requirements.

Both parts are ROHS3 compliant and REACH unaffected, meeting environmental standards for new equipment design.

Frequently Asked Questions (FAQ)

Q: Can the Altech 1C4UL directly replace the SCHURTER 4420.0638 in existing installations?

A: Yes, for DC applications at 180 V and below. Both components have identical current ratings (4A), breaker type (thermal magnetic), mounting configuration (DIN rail), and actuation method (lever). Physical form factor and electrical performance are equivalent.

Q: What is the voltage compatibility difference between these two breakers?

A: The SCHURTER 4420.0638 is rated for 180 V DC. The Altech 1C4UL is rated for 277 V AC and operates in both AC and DC applications. In DC circuits at 180 V, the 1C4UL operates within its rated voltage envelope.

Q: Are the certifications equivalent between the two parts?

A: Both parts carry UL certification. The SCHURTER includes additional international standards (EN 60934, GB 17701, IEC 60934). The Altech includes CE marking and cULus certification. For applications requiring specific regional compliance, verify that the applicable certifications are present on the selected part.

Q: What is the packaging difference?

A: The SCHURTER 4420.0638 is supplied with unspecified packaging. The Altech 1C4UL is supplied in bulk packaging. Confirm packaging requirements with your procurement process.

Q: Are both parts RoHS compliant?

A: Yes, both the SCHURTER 4420.0638 and Altech 1C4UL are ROHS3 compliant and REACH unaffected.