Altech Corporation 2B2UM Thermal Magnetic Circuit Breaker Equivalent & Substitute Parts

Part Overview

The 2B2UM is a thermal magnetic circuit breaker manufactured by Altech Corporation, rated for 2A current with dual voltage capability (480V AC / 80V DC). This DIN rail-mounted breaker features a lever actuator and is designed for industrial control applications requiring reliable overcurrent protection. The product maintains active status with full compliance to CSA and UL508 standards. Substitute parts become necessary when addressing supply chain constraints, regional availability requirements, or specific approval agency certifications needed for particular installations.

Key Parameters

Parameter	Value
Manufacturer	Altech Corporation
Series	V-EA
Breaker Type	Thermal Magnetic
Current Rating	2A
Voltage Rating - AC	480V
Voltage Rating - DC	80V
Mounting Type	DIN Rail
Actuator Type	Lever
Number of Poles	2
Packaging	Bulk
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

All substitute parts (2C2UM, 2D2UM, 2E2UM, 2G2UM) are classified as parametric equivalents to the 2B2UM based on identical electrical and mechanical specifications. Substitution eligibility is determined by the following criteria:

Critical Parameters for Substitution:

Current Rating: 2A (all substitutes match)
Voltage Rating - AC: 480V (all substitutes match)
Voltage Rating - DC: 80V (all substitutes match)
Breaker Type: Thermal Magnetic (all substitutes match)
Mounting Type: DIN Rail (all substitutes match)
Actuator Type: Lever (all substitutes match)
Number of Poles: 2 (all substitutes match)
Series: V-EA (all substitutes match)

The primary differentiator among these parts is the thermal trip characteristic designation (B, C, D, E, or G), which defines the specific thermal response curve. All parts share identical voltage ratings, current capacity, and mechanical form factor, making them interchangeable from an electrical and physical installation perspective.

Parameter Comparison

Part Number	Manufacturer	Current Rating	Voltage AC	Voltage DC	Breaker Type	Mounting	Poles	Approval Agency	Inventory (Pcs)	Product Status
2B2UM	Altech Corporation	2A	480V	80V	Thermal Magnetic	DIN Rail	2	CSA, UL508	1139	Active
2C2UM	Altech Corporation	2A	480V	80V	Thermal Magnetic	DIN Rail	2	CSA, UL508, VDE	875	Active
2D2UM	Altech Corporation	2A	480V	80V	Thermal Magnetic	DIN Rail	2	CSA, UL508, VDE	1151	Active
2E2UM	Altech Corporation	2A	480V	80V	Thermal Magnetic	DIN Rail	2	CSA, UL508	825	Active
2G2UM	Altech Corporation	2A	480V	80V	Thermal Magnetic	DIN Rail	2	CSA, UL508	897	Active

Engineering Selection Recommendations

All five circuit breaker models maintain active product status and comply with CSA and UL508 standards. Selection between 2B2UM and its substitutes should be based on the following factors:

Approval Agency Requirements: Parts 2C2UM and 2D2UM include VDE certification in addition to CSA and UL508, making them suitable for installations requiring European compliance standards. Parts 2B2UM, 2E2UM, and 2G2UM carry CSA and UL508 certifications only.

Thermal Characteristic Designation: The letter designation (B, C, D, E, G) indicates the thermal trip curve. Selection of the appropriate characteristic depends on the specific load profile and protection requirements of the circuit being protected. All characteristics are available within the V-EA series at identical electrical ratings.

Inventory Availability: Current stock levels range from 825 to 1151 pieces across all models, providing flexibility for procurement planning.

RoHS Compliance: All substitute parts maintain ROHS3 compliance, ensuring environmental regulatory alignment with the original 2B2UM specification.

Frequently Asked Questions (FAQ)

Q: Can 2C2UM, 2D2UM, 2E2UM, and 2G2UM be used interchangeably with 2B2UM in the same circuit?

A: Yes, from an electrical and mechanical installation perspective. All parts share identical current ratings (2A), voltage ratings (480V AC / 80V DC), mounting configuration (DIN Rail), and physical form factor (2-pole lever actuator). The thermal characteristic designation differs, which affects the trip response curve but not the installation compatibility.

Q: What is the significance of the thermal characteristic letter (B, C, D, E, G)?

A: The letter designation defines the thermal trip curve of the breaker, determining how quickly the thermal element responds to overcurrent conditions. Selection of the appropriate characteristic depends on the specific application requirements and load characteristics. All characteristics are electrically and mechanically compatible within the V-EA series.

Q: Are there regional compliance differences between these substitute parts?

A: Parts 2C2UM and 2D2UM include VDE certification, making them suitable for applications requiring European standards compliance. Parts 2B2UM, 2E2UM, and 2G2UM carry CSA and UL508 certifications. Selection should align with the regulatory requirements of the installation location.

Q: Does substitution affect the RoHS or REACH compliance status?

A: No. All substitute parts maintain ROHS3 compliance and REACH Unaffected status identical to the 2B2UM, ensuring no change in environmental regulatory alignment.

Q: What packaging format is available for these circuit breakers?

A: All parts are supplied in Bulk packaging, consistent with industrial component distribution standards for DIN rail-mounted devices.

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