2G40UM 40A Circuit Breaker Equivalent & Substitute Parts

Part Overview

The 2G40UM is a thermal magnetic circuit breaker manufactured by Altech Corporation, rated for 40A at 480V AC and 60V DC. This DIN rail-mounted breaker with lever actuator is part of the V-EA series and maintains active product status. Equivalent and substitute parts become necessary when addressing supply chain constraints, inventory availability, or specific application requirements while maintaining identical electrical and mechanical specifications.

Substiute Parts

2G40UM

Altech CorporationIn Stock: 11172G40UM Datasheet

Current PartRFQ

2B40UM

Altech CorporationIn Stock: 8452B40UM Datasheet

Parametric EquivalentRFQ

2E40UM

Altech CorporationIn Stock: 9702E40UM Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

The 2G40UM, 2B40UM, and 2E40UM form a parametric equivalent group based on identical electrical and mechanical specifications. All three parts share the following critical parameters that define substitutability:

• Current Rating: 40A
• Voltage Rating: 480V AC / 60V DC
• Breaker Type: Thermal Magnetic
• Mounting: DIN Rail
• Actuator: Lever
• Poles: 2
• Approvals: CSA, UL508
• Series: V-EA
• RoHS Status: ROHS3 Compliant

The primary distinction between these parts lies in their characteristic designation (G, B, and E), which reflects different trip curve characteristics within the V-EA series. All three maintain identical form factor, electrical ratings, and regulatory compliance.

Parameter Comparison

Engineering Selection Recommendations

All three parts—2G40UM, 2B40UM, and 2E40UM—are suitable for direct substitution based on identical electrical specifications, mechanical form factor, and regulatory compliance. Selection between these parts should be based on:

• Availability and inventory status
• Application-specific trip curve requirements (G, B, or E characteristic)
• Supply chain lead times
• Cost considerations

All parts maintain active product status, ROHS3 compliance, and CSA/UL508 certifications, ensuring compatibility with existing installations and regulatory requirements.

Frequently Asked Questions (FAQ)

Q: Can 2B40UM replace 2G40UM in an existing installation? A: Yes. Both parts share identical electrical ratings (40A, 480V AC, 60V DC), breaker type (thermal magnetic), mounting configuration (DIN rail), and regulatory approvals (CSA, UL508). The primary difference is the trip curve characteristic, which should be verified against application requirements.

Q: What is the difference between the G, B, and E designations? A: These designations indicate different trip curve characteristics within the V-EA series. All three maintain the same current rating, voltage rating, and physical form factor. Selection depends on the specific protection curve required for the application.

Q: Are all three parts ROHS3 compliant? A: Yes. The 2G40UM, 2B40UM, and 2E40UM are all ROHS3 compliant and carry identical regulatory approvals (CSA, UL508).

Q: Can these parts be used interchangeably in the same DIN rail enclosure? A: Yes. All three parts have identical mounting specifications (DIN rail) and physical dimensions, allowing direct mechanical and electrical interchangeability within the same enclosure.

Q: What packaging options are available? A: All three parts are supplied in bulk packaging as new original stock.