Circuit Breaker Thermal Magnetic 1CU2L Equivalent & Substitute Parts

Part Overview

The 1CU2L is a thermal magnetic circuit breaker manufactured by Altech Corporation, rated for 2A at 277V AC and 125V DC with lever actuation on DIN rail mounting. This component is classified as obsolete, making identification of active equivalent parts essential for system maintenance and component replacement in industrial control applications. The 1CU2L series provides overcurrent and short-circuit protection in single-pole configurations with CE, cULus, and UL489 certifications.

Substiute Parts

1CU2L

Altech CorporationIn Stock: 9221CU2L Datasheet

Current PartRFQ

1C2UL

Altech CorporationIn Stock: 11301C2UL Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the 1CU2L is determined by strict equivalence across the following electrical and mechanical parameters:

• Current Rating: 2A (exact match required)
• Voltage Rating - AC: 277V (exact match required)
• Breaker Type: Thermal Magnetic (exact match required)
• Actuator Type: Lever (exact match required)
• Number of Poles: 1 (exact match required)
• Mounting Type: DIN Rail (exact match required)
• Approval Agencies: CE, cULus, UL489 (minimum compliance required)

The 1C2UL from Altech Corporation meets all substitution criteria as an active product with identical electrical ratings, thermal magnetic protection characteristics, and regulatory certifications.

Parameter Comparison

Engineering Selection Recommendations

The 1C2UL is the direct substitute for the obsolete 1CU2L. Both components are manufactured by Altech Corporation and share identical electrical specifications, thermal magnetic protection characteristics, and regulatory certifications (CE, cULus, UL489). The 1C2UL maintains active product status with current manufacturing support and inventory availability. Selection of the 1C2UL eliminates obsolescence risk while preserving functional equivalence in DIN rail-mounted single-pole circuit breaker applications rated for 2A at 277V AC.

Frequently Asked Questions (FAQ)

Q: Can the 1C2UL directly replace the 1CU2L in existing installations?

A: Yes. Both components share identical current ratings (2A), voltage ratings (277V AC), breaker type (thermal magnetic), actuator type (lever), pole configuration (1), mounting type (DIN rail), and regulatory certifications (CE, cULus, UL489). The 1C2UL is the active equivalent.

Q: What is the primary reason for substitution?

A: The 1CU2L is classified as obsolete. The 1C2UL provides functional equivalence with active product status and ongoing manufacturer support.

Q: Are there packaging differences between these parts?

A: The 1CU2L is specified with dash packaging notation, while the 1C2UL is supplied in bulk packaging. Both are suitable for DIN rail installation.

Q: Do both parts meet the same regulatory standards?

A: Yes. Both the 1CU2L and 1C2UL carry CE, cULus, and UL489 certifications and are ROHS3 compliant.

Q: Is DC voltage rating a concern for substitution?

A: The 1CU2L specifies 125V DC rating. The 1C2UL substitute data does not explicitly state DC voltage rating. Verify DC voltage requirements in your application before final selection.