Circuit Breaker Thermal Magnetic 1CU6L - Equivalent & Substitute Parts

Part Overview

The 1CU6L is a single-pole thermal magnetic circuit breaker rated for 6A at 277V AC and 125V DC, designed for DIN rail mounting with lever actuation. This component is classified as obsolete, making identification of functionally equivalent alternatives essential for system maintenance, repair, and component sourcing in applications where the original part is no longer readily available through standard distribution channels.

Substiute Parts

1CU6L

Altech CorporationIn Stock: 10411CU6L Datasheet

Current PartRFQ

1C6UL

Altech CorporationIn Stock: 11421C6UL Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 1CU6L is determined by strict equivalence across the following electrical and mechanical parameters:

• Current Rating: 6A (exact match required)
• Voltage Rating - AC: 277V (exact match required)
• Breaker Type: Thermal Magnetic (exact match required)
• Number of Poles: 1 (exact match required)
• Mounting Type: DIN Rail (exact match required)
• Actuator Type: Lever (exact match required)
• Approval Agencies: CE, cULus, UL489 (certification compliance required)

The 1C6UL meets all substitution criteria. While the 1C6UL does not specify a DC voltage rating in the provided data, it maintains electrical and mechanical compatibility across all other critical parameters, including the same AC voltage rating, current capacity, breaker topology, and regulatory certifications.

Parameter Comparison

Engineering Selection Recommendations

The 1C6UL is the direct functional equivalent for the obsolete 1CU6L. Both components are manufactured by Altech Corporation and maintain identical electrical ratings, breaker topology, and regulatory certifications. The 1C6UL carries active product status, ensuring continued availability and supply chain reliability. Both parts comply with ROHS3 requirements and hold equivalent approval certifications (CE, cULus, UL489), confirming suitability for the same applications and regulatory environments.

Frequently Asked Questions (FAQ)

Q: Can the 1C6UL directly replace the 1CU6L in existing installations?

A: Yes. Both components share identical electrical ratings (6A, 277V AC), breaker type (thermal magnetic), pole configuration (single-pole), mounting interface (DIN rail), and actuation mechanism (lever). Regulatory certifications are equivalent.

Q: What is the significance of the 1CU6L being obsolete?

A: Obsolete status indicates the part is no longer manufactured or distributed through standard channels. The 1C6UL, with active product status, provides continued component availability for replacement and new system designs.

Q: Are there differences in packaging between these parts?

A: The 1CU6L packaging is specified as "-" (not defined in available data). The 1C6UL is supplied in bulk packaging. Packaging format does not affect electrical or mechanical compatibility.

Q: Do both parts meet the same regulatory standards?

A: Yes. Both the 1CU6L and 1C6UL hold identical approval certifications: CE, cULus, and UL489. Both comply with ROHS3 requirements.

Q: Is DC voltage rating a factor in substitution?

A: The 1CU6L specifies 125V DC capability. The 1C6UL data does not include a DC voltage specification. For applications requiring DC operation at 125V, the DC rating specification should be confirmed with the manufacturer or distributor before final selection.