1G30UM 30A Circuit Breaker - Equivalent & Substitute Parts

Part Overview

The 1G30UM is a thermal magnetic circuit breaker manufactured by Altech Corporation, rated for 30A at 277V AC and 24V DC. This DIN rail-mounted breaker is designed for single-pole protection applications and carries active product status with full CSA and UL508 certification. Substitute parts are identified when equivalent electrical and mechanical parameters are required for system compatibility or inventory availability.

Substiute Parts

1G30UM

Altech CorporationIn Stock: 11371G30UM Datasheet

Current PartRFQ

1D30UM

Altech CorporationIn Stock: 6911D30UM Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 1G30UM are identified based on the following critical parameters that must remain constant:

• Current Rating: 30A (fixed requirement)
• Breaker Type: Thermal Magnetic (fixed requirement)
• Mounting Type: DIN Rail (fixed requirement)
• Actuator Type: Lever (fixed requirement)
• Number of Poles: 1 (fixed requirement)
• Series: V-EA (fixed requirement)
• Approval Agency: CSA, UL508 (fixed requirement)

The 1D30UM qualifies as a parametric equivalent substitute because it maintains all critical electrical and mechanical characteristics. The primary difference is the AC voltage rating (480V versus 277V), which represents a higher voltage capability suitable for different circuit applications while preserving all other functional parameters.

Parameter Comparison

Engineering Selection Recommendations

Both the 1G30UM and 1D30UM are active products with identical regulatory certifications (CSA, UL508) and full RoHS3 compliance. Selection between these parts is determined by circuit voltage requirements: the 1G30UM is specified for 277V AC applications, while the 1D30UM is rated for 480V AC applications. Both maintain identical 30A current protection and 24V DC ratings. The choice of substitute should be based on the actual system voltage specification rather than interchangeability assumptions.

Frequently Asked Questions (FAQ)

Q: Can the 1D30UM replace the 1G30UM in a 277V AC circuit?

A: The 1D30UM is rated for 480V AC, which exceeds the 277V requirement. A higher voltage-rated breaker can be used in lower voltage applications without compromising protection characteristics, provided all other parameters (current rating, mounting, pole configuration) remain identical.

Q: Are both parts suitable for DIN rail installation?

A: Yes. Both the 1G30UM and 1D30UM are designed for DIN rail mounting with identical mechanical interfaces and lever actuator configurations.

Q: Do these parts carry the same regulatory approvals?

A: Yes. Both parts are certified by CSA and UL508, and both comply with ROHS3 requirements.

Q: What is the primary difference between these substitute parts?

A: The AC voltage rating differs: 1G30UM is rated for 277V AC, while 1D30UM is rated for 480V AC. All other electrical and mechanical specifications are identical.

Q: Are these parts from the same product series?

A: Yes. Both the 1G30UM and 1D30UM belong to the Altech Corporation V-EA series of thermal magnetic circuit breakers.