2B4UM 4A Circuit Breaker Equivalent & Substitute Parts

Part Overview

The 2B4UM is an active thermal magnetic circuit breaker manufactured by Altech Corporation, rated for 4A at 480V AC and 80V DC. This DIN rail-mounted device features a lever actuator and dual-pole configuration, certified by CSA and UL508. Substitute parts are necessary when the primary model is unavailable or when specific thermal-magnetic characteristics (B, C, D, E, G, or Z curve) are required for application-specific protection requirements.

Substiute Parts

2B4UM

Altech CorporationIn Stock: 9672B4UM Datasheet

Current PartRFQ

2C4UM

Altech CorporationIn Stock: 11412C4UM Datasheet

Parametric EquivalentRFQ

2D4UM

Altech CorporationIn Stock: 12142D4UM Datasheet

Parametric EquivalentRFQ

2E4UM

Altech CorporationIn Stock: 11692E4UM Datasheet

Parametric EquivalentRFQ

2G4UM

Altech CorporationIn Stock: 10192G4UM Datasheet

Parametric EquivalentRFQ

2Z4UM

Altech CorporationIn Stock: 9672Z4UM Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

All substitute parts for the 2B4UM maintain identical electrical and mechanical parameters: 4A current rating, 480V AC / 80V DC voltage ratings, thermal magnetic breaker type, DIN rail mounting, lever actuation, and dual-pole configuration. The substitution logic is based strictly on these matching parameters. The primary distinction between the main part and substitutes is the thermal-magnetic trip curve characteristic (B-curve for 2B4UM versus C, D, E, G, and Z-curve variants for substitute models). All parts are manufactured by Altech Corporation within the V-EA series and maintain equivalent form, fit, and function for applications requiring these specific electrical ratings and mounting standards.

Parameter Comparison

Engineering Selection Recommendations

Selection among 2B4UM and its substitutes is determined by the required thermal-magnetic trip curve characteristic for the application. All parts maintain identical electrical ratings (4A, 480V AC, 80V DC), mounting configuration (DIN rail, 2-pole, lever actuator), and compliance certifications (CSA, UL508). Parts 2C4UM and 2D4UM provide additional VDE certification. Product status is active for all variants, ensuring continued availability and support. Selection should be based on the specific trip curve requirement of the circuit protection scheme rather than electrical or mechanical compatibility, as all parameters are equivalent across the product family.

Frequently Asked Questions (FAQ)

Q: Can 2C4UM, 2D4UM, 2E4UM, 2G4UM, or 2Z4UM be used as direct replacements for 2B4UM?

A: Yes, all listed parts are parametric equivalents with identical electrical ratings (4A, 480V AC, 80V DC), mounting type (DIN rail), pole configuration (2-pole), and actuator type (lever). The difference is the thermal-magnetic trip curve characteristic. Direct substitution is possible when the application permits use of an alternative curve type.

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

A: These designations indicate the thermal-magnetic trip curve characteristic of each breaker. The curve type determines the current threshold and response time for thermal and magnetic trip functions. Selection of the correct curve type is application-dependent and based on circuit protection requirements.

Q: Are all substitute parts certified to the same standards as 2B4UM?

A: All parts carry CSA and UL508 certifications. Additionally, 2C4UM and 2D4UM include VDE certification. All parts are ROHS3 compliant and REACH unaffected.

Q: What is the packaging format for these parts?

A: All parts are supplied in bulk packaging.

Q: Are there inventory considerations when selecting a substitute?

A: Current inventory levels vary: 2B4UM (911 pcs), 2C4UM (1080 pcs), 2D4UM (1169 pcs), 2E4UM (1066 pcs), 2G4UM (969 pcs), and 2Z4UM (951 pcs). Inventory availability should be confirmed at the time of procurement.