1C40UM 40A Circuit Breaker Equivalent & Substitute Parts

Part Overview

The 1C40UM is a thermal magnetic circuit breaker manufactured by Altech Corporation, rated for 40A at 480V AC and 24V DC. This single-pole DIN rail-mounted breaker with lever actuation is part of the V-EA series and maintains active product status with CSA and UL508 certifications. Equivalent and substitute parts are identified based on matching electrical ratings, mechanical mounting specifications, and approval certifications to ensure direct interchangeability in circuit protection applications.

Substiute Parts

1C40UM

Altech CorporationIn Stock: 9811C40UM Datasheet

Current PartRFQ

1D40UM

Altech CorporationIn Stock: 7021D40UM Datasheet

Parametric EquivalentRFQ

1E40UM

Altech CorporationIn Stock: 10951E40UM Datasheet

Parametric EquivalentRFQ

1G40UM

Altech CorporationIn Stock: 10351G40UM Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 1C40UM are identified based on the following critical parameters that determine functional interchangeability:

Mandatory Matching Parameters:

• Current Rating: 40A
• Breaker Type: Thermal Magnetic
• Mounting Type: DIN Rail
• Actuator Type: Lever
• Number of Poles: 1
• Series: V-EA
• Approval Agency: CSA, UL508
• Product Status: Active

Voltage Rating Consideration: The 1C40UM operates at 480V AC. Substitute parts 1D40UM also maintains 480V AC rating. Parts 1E40UM and 1G40UM operate at 277V AC, representing a different voltage class within the same series and current rating. Selection depends on the specific circuit voltage requirement.

Parameter Comparison

Engineering Selection Recommendations

Direct Substitution (Same Voltage Class): The 1D40UM is a direct parametric equivalent to the 1C40UM, matching all electrical and mechanical specifications including the 480V AC rating. Both parts maintain active product status and identical CSA and UL508 certifications, supporting seamless substitution in 480V AC circuits.

Voltage-Dependent Substitution: Parts 1E40UM and 1G40UM are functionally equivalent within the V-EA series at the 40A current rating but operate at 277V AC instead of 480V AC. These parts are suitable only for circuits designed for 277V AC operation and are not interchangeable with the 1C40UM in 480V AC applications.

Compliance and Availability: All substitute parts maintain ROHS3 compliance and active product status. Selection should be based on circuit voltage requirements and application-specific approval certifications.

Frequently Asked Questions (FAQ)

Q: Can 1E40UM or 1G40UM replace 1C40UM in a 480V AC circuit? A: No. The 1E40UM and 1G40UM are rated for 277V AC operation, while the 1C40UM is rated for 480V AC. Voltage mismatch will result in improper breaker operation and potential safety hazards. Use only in circuits matching the specified voltage rating.

Q: What is the difference between 1C40UM and 1D40UM? A: Both parts are parametric equivalents with identical electrical ratings (40A, 480V AC, 24V DC), mechanical specifications (DIN rail mounting, lever actuation, single pole), and certifications (CSA, UL508). The primary distinction is the base product number designation within the V-EA series.

Q: Are all substitute parts available in the same packaging? A: Yes. All listed substitute parts are supplied in bulk packaging, consistent with the 1C40UM packaging specification.

Q: Do all substitute parts carry the same certifications? A: Yes. All substitute parts listed maintain CSA and UL508 certifications, ensuring compliance with the same regulatory standards as the 1C40UM.

Q: Can these breakers be used interchangeably in DIN rail installations? A: Yes, for voltage-matched applications. All parts feature identical DIN rail mounting and lever actuation, supporting direct mechanical interchangeability when voltage ratings align with circuit requirements.