3Z40UM 40A Circuit Breaker Equivalent & Substitute Parts

Part Overview

The 3Z40UM is a three-pole thermal magnetic circuit breaker manufactured by Altech Corporation, rated for 40A at 480V AC and 60V DC with lever actuation and DIN Rail mounting. This component is classified as Active product status with full CSA and UL508 approval. Equivalent and substitute parts within the V-EA series share identical electrical and mechanical specifications, allowing direct replacement based on application requirements and inventory availability.

Substiute Parts

3Z40UM

Altech CorporationIn Stock: 9633Z40UM Datasheet

Current PartRFQ

3B40UM

Altech CorporationIn Stock: 9493B40UM Datasheet

Parametric EquivalentRFQ

3C40UM

Altech CorporationIn Stock: 10253C40UM Datasheet

Parametric EquivalentRFQ

3E40UM

Altech CorporationIn Stock: 7873E40UM Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution within this product group is determined by matching the following critical parameters: current rating (40A), voltage ratings (480V AC / 60V DC), breaker type (thermal magnetic), pole configuration (3-pole), mounting interface (DIN Rail), and actuator mechanism (lever). All substitute parts listed maintain identical values across these parameters, establishing full parametric equivalence. The distinction between 3Z40UM, 3B40UM, 3C40UM, and 3E40UM lies in the thermal trip characteristic designation (Z, B, C, and E respectively), which defines the current threshold at which thermal protection activates. Selection between these variants depends on the specific overcurrent protection curve required by the application circuit.

Parameter Comparison

Engineering Selection Recommendations

All four circuit breaker models (3Z40UM, 3B40UM, 3C40UM, 3E40UM) maintain Active product status and comply with applicable regulatory standards. The 3Z40UM, 3B40UM, and 3E40UM carry dual CSA and UL508 certification, while the 3C40UM holds UL508 certification. Selection should be based on the specific thermal trip characteristic required by the application. All variants are ROHS3 compliant and REACH unaffected, meeting environmental compliance requirements. Inventory levels range from 741 to 936 pieces across the substitute group, supporting procurement flexibility.

Frequently Asked Questions (FAQ)

Q: Can 3B40UM, 3C40UM, and 3E40UM be used interchangeably with 3Z40UM? A: These parts are parametric equivalents sharing identical electrical ratings (40A, 480V AC, 60V DC), pole configuration (3-pole), mounting type (DIN Rail), and actuator mechanism (lever). Interchangeability depends on whether the application circuit requires the specific thermal trip characteristic of the Z designation. If the circuit design specifies a Z-characteristic breaker, substitution with B, C, or E variants is not appropriate.

Q: What is the difference between the Z, B, C, and E designations? A: These letters denote the thermal trip characteristic curve, which defines the current threshold at which the thermal protection element activates. Each characteristic is engineered for different load profiles and fault conditions. Selection must align with the original circuit design specification.

Q: Are all substitute parts certified to the same standards? A: The 3Z40UM, 3B40UM, and 3E40UM carry CSA and UL508 approvals. The 3C40UM carries UL508 approval. Verify that the certification profile matches your application requirements before substitution.

Q: What is the packaging format for these circuit breakers? A: All parts are supplied in Bulk packaging, suitable for direct installation on DIN Rail systems without additional mounting hardware.

Q: Are these parts RoHS and REACH compliant? A: All four models are ROHS3 compliant and REACH unaffected, meeting current environmental and hazardous substance regulations.