Altech Corporation 3B50UM Circuit Breaker - Equivalent & Substitute Parts

Part Overview

The 3B50UM is a three-pole thermal magnetic circuit breaker manufactured by Altech Corporation, rated for 50A at 480V AC and 60V DC. This DIN rail-mounted device features lever actuation and is part of the V-EA series. The product is active and widely stocked, with 836 units currently available. Circuit breakers of this specification are essential components in industrial and commercial electrical distribution systems for overcurrent protection and load switching. Substitute parts become necessary when the primary model is unavailable, when specific thermal characteristics are required for application-specific load profiles, or when inventory optimization across equivalent product lines is needed.

Substiute Parts

3B50UM

Altech CorporationIn Stock: 9093B50UM Datasheet

Current PartRFQ

3C50UM

Altech CorporationIn Stock: 10363C50UM Datasheet

Parametric EquivalentRFQ

3E50UM

Altech CorporationIn Stock: 11113E50UM Datasheet

Parametric EquivalentRFQ

3G50UM

Altech CorporationIn Stock: 11473G50UM Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

The 3B50UM circuit breaker has three direct parametric equivalents within the Altech V-EA series: 3C50UM, 3E50UM, and 3G50UM. These substitutes are qualified based on identical electrical and mechanical parameters:

Qualifying Parameters for Substitution:

• Current Rating: 50A (all models)
• Voltage Rating - AC: 480V (all models)
• Voltage Rating - DC: 60V (all models)
• Number of Poles: 3 (all models)
• Breaker Type: Thermal Magnetic (all models)
• Mounting Type: DIN Rail (all models)
• Actuator Type: Lever (all models)
• Series: V-EA (all models)
• Approval Agencies: CSA, UL508 (all models)
• RoHS Status: ROHS3 Compliant (all models)

The primary distinction among these models is the thermal characteristic designation (B, C, E, and G), which defines the trip curve behavior under thermal load conditions. All four models share identical voltage, current, and mechanical specifications, making them interchangeable from an electrical installation perspective within systems designed for the V-EA series.

Parameter Comparison

Engineering Selection Recommendations

All four circuit breaker models (3B50UM, 3C50UM, 3E50UM, 3G50UM) are active products with full regulatory compliance under CSA and UL508 standards. Each model maintains ROHS3 compliance and identical electrical ratings, ensuring compatibility within V-EA series installations.

Selection among these equivalents should be based on application-specific thermal load requirements, as the B, C, E, and G designations represent different thermal trip curve characteristics. All models are suitable for direct substitution in DIN rail-mounted three-pole distribution systems rated for 50A at 480V AC or 60V DC operation.

Inventory availability varies across the product line, with 3G50UM currently showing the highest stock level at 1048 units, followed by 3E50UM at 1001 units, 3C50UM at 933 units, and 3B50UM at 836 units.

Frequently Asked Questions (FAQ)

Q: Can 3C50UM, 3E50UM, and 3G50UM be used interchangeably with 3B50UM in existing installations?

A: Yes. All four models share identical electrical ratings (50A, 480V AC, 60V DC), mechanical specifications (three-pole, DIN rail mount, lever actuation), and regulatory approvals (CSA, UL508). They are direct parametric equivalents within the V-EA series and can be substituted without modification to the electrical installation.

Q: What is the difference between the B, C, E, and G designations?

A: These letters designate the thermal characteristic or trip curve of the breaker, defining how quickly the thermal element responds to sustained overcurrent conditions. The specific thermal curve selection depends on the load profile and protection requirements of the application.

Q: Are all substitute models ROHS3 compliant?

A: Yes. The 3B50UM, 3C50UM, 3E50UM, and 3G50UM are all ROHS3 compliant and meet REACH requirements.

Q: What certifications apply to these circuit breakers?

A: All models carry CSA and UL508 approvals, qualifying them for use in certified electrical distribution systems.

Q: Is packaging identical across all substitute models?

A: Yes. All four models are supplied in bulk packaging.

Q: Can these breakers be used in both AC and DC applications?

A: Yes. All models are rated for 480V AC and 60V DC operation, allowing use in mixed AC/DC distribution systems within these voltage specifications.