2B1UM 1A Circuit Breaker Equivalent & Substitute Parts

Part Overview

The 2B1UM is an active Altech Corporation thermal magnetic circuit breaker rated for 1A at 480V AC and 80V DC, designed for DIN rail mounting with lever actuation. This component is part of the V-EA series and carries CSA and UL508 approvals. Equivalent substitute parts within this series share identical electrical and mechanical specifications, differing only in thermal magnetic trip characteristics. Substitute parts are necessary when specific trip curve requirements or inventory availability necessitate alternative configurations within the same performance envelope.

Substiute Parts

2B1UM

Altech CorporationIn Stock: 9192B1UM Datasheet

Current PartRFQ

2C1UM

Altech CorporationIn Stock: 8602C1UM Datasheet

Parametric EquivalentRFQ

2D1UM

Altech CorporationIn Stock: 7972D1UM Datasheet

Parametric EquivalentRFQ

2E1UM

Altech CorporationIn Stock: 10312E1UM Datasheet

Parametric EquivalentRFQ

2G1UM

Altech CorporationIn Stock: 11132G1UM Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution within the 2B1UM family is determined by equivalence across the following critical parameters: current rating (1A), voltage ratings (480V AC / 80V DC), breaker type (thermal magnetic), mounting configuration (DIN rail), actuator type (lever), pole count (2), and series designation (V-EA). All substitute parts 2C1UM, 2D1UM, 2E1UM, and 2G1UM maintain these specifications identically. The designations B, C, D, E, and G indicate different thermal magnetic trip curve characteristics, which define the time-current response of the breaker but do not affect electrical or mechanical compatibility. Selection among these substitutes depends on the specific trip curve requirement for the application.

Parameter Comparison

Engineering Selection Recommendations

All five parts in this family maintain active product status and comply with ROHS3 and REACH requirements. Selection among 2B1UM, 2C1UM, 2D1UM, 2E1UM, and 2G1UM is based on trip curve specification and regulatory scope. Parts 2C1UM and 2D1UM carry additional VDE certification, suitable for applications requiring European compliance. Parts 2B1UM, 2E1UM, and 2G1UM carry CSA and UL508 approvals, appropriate for North American regulatory environments. Inventory availability ranges from 692 to 1073 units across the family. Direct substitution is valid across all five part numbers provided the application's trip curve requirement aligns with the selected part designation.

Frequently Asked Questions (FAQ)

Q: Can 2C1UM replace 2B1UM in my application? A: Yes, provided your application does not require the specific trip curve of the B characteristic. Both parts share identical electrical ratings (1A, 480V AC, 80V DC), mounting configuration (DIN rail), and mechanical interface (2-pole lever actuator). Verify that the C characteristic trip curve meets your circuit protection requirements.

Q: What is the difference between the B, C, D, E, and G designations? A: These letters denote distinct thermal magnetic trip curve characteristics that define the time-current response of the breaker. All other electrical and mechanical parameters remain identical across the family. Selection depends on the specific overcurrent protection curve required by your application.

Q: Are 2C1UM and 2D1UM interchangeable with 2B1UM? A: Electrically and mechanically, yes. Both 2C1UM and 2D1UM maintain the same current rating, voltage ratings, DIN rail mounting, and 2-pole lever configuration. The difference is trip curve characteristic and regulatory approvals. 2C1UM and 2D1UM include VDE certification in addition to CSA and UL508.

Q: Which part should I select for European applications? A: 2C1UM or 2D1UM are recommended for European regulatory environments due to VDE certification. Both maintain identical electrical and mechanical specifications to 2B1UM while providing additional compliance scope.

Q: Can I use any of these parts interchangeably in a DIN rail installation? A: Yes. All five parts are designed for DIN rail mounting with identical mechanical footprint and lever actuation. Physical installation compatibility is assured across the entire family.

Q: What is the inventory status for these substitutes? A: 2G1UM has the highest availability at 1073 units, followed by 2E1UM at 1006 units. 2B1UM is available at 865 units, 2C1UM at 835 units, and 2D1UM at 692 units.