Altech Corporation 3B2UM Circuit Breaker Equivalent & Substitute Parts

Part Overview

The Altech Corporation 3B2UM is a three-pole thermal magnetic circuit breaker rated for 2A at 480V AC and 80V DC, designed for DIN rail mounting with lever actuation. This component is classified as Active product status with full inventory availability. Substitute parts become necessary when the primary part number is unavailable, when specific approval agency requirements vary by application, or when alternative thermal magnetic characteristics (B, D, E, or G curve) are required for system compatibility.

Substiute Parts

3B2UM

Altech CorporationIn Stock: 11483B2UM Datasheet

Current PartRFQ

3D2UM

Altech CorporationIn Stock: 10273D2UM Datasheet

Parametric EquivalentRFQ

3E2UM

Altech CorporationIn Stock: 8833E2UM Datasheet

Parametric EquivalentRFQ

3G2UM

Altech CorporationIn Stock: 9553G2UM Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

All substitute parts for the 3B2UM maintain identical electrical and mechanical parameters: 2A current rating, 480V AC / 80V DC voltage ratings, three-pole configuration, DIN rail mounting, and lever actuation. The substitution group consists of four part numbers within the Altech V-EA series, differentiated by thermal magnetic trip curve characteristics (B, D, E, and G curves). These curve designations define the time-current response of the breaker but do not alter the core electrical specifications or physical mounting requirements. Substitution is valid when the application permits interchangeability of thermal magnetic characteristics or when a specific curve type is required for system coordination.

Parameter Comparison

Engineering Selection Recommendations

All four part numbers in this substitution group maintain Active product status and ROHS3 compliance. The 3D2UM offers the broadest approval coverage with CSA, UL508, and VDE certifications, making it suitable for applications requiring European standards compliance. The 3B2UM, 3E2UM, and 3G2UM carry CSA and UL508 approvals, meeting North American industrial standards. Selection between these parts depends on application-specific thermal magnetic curve requirements and regional certification mandates. Inventory levels are adequate across all four part numbers, with 3B2UM maintaining the highest stock position at 1136 units.

Frequently Asked Questions (FAQ)

Q: Can 3D2UM, 3E2UM, and 3G2UM be used interchangeably with 3B2UM?

A: Yes, within the constraints of thermal magnetic curve compatibility. All parts share identical electrical ratings (2A, 480V AC, 80V DC), pole configuration (3-pole), mounting type (DIN rail), and actuation method (lever). The letters B, D, E, and G designate different thermal magnetic trip curves; substitution is valid when the application permits curve interchangeability or when a specific curve is required for system coordination.

Q: What is the difference between the thermal magnetic curves?

A: The B, D, E, and G designations represent different time-current response characteristics of the thermal magnetic mechanism. These curves define the breaker's sensitivity to overcurrent conditions but do not alter the rated current, voltage, or physical specifications. Curve selection depends on the protected circuit's inrush current characteristics and coordination requirements.

Q: Are all parts in this group ROHS3 compliant?

A: Yes, all four part numbers (3B2UM, 3D2UM, 3E2UM, 3G2UM) are ROHS3 compliant and REACH unaffected.

Q: Which part has the broadest approval coverage?

A: The 3D2UM carries CSA, UL508, and VDE certifications, providing coverage for North American and European standards. The other three parts carry CSA and UL508 approvals.

Q: Are these parts available in different packaging options?

A: All parts in this substitution group are supplied in Bulk packaging as specified in the provided data.

Q: What is the current inventory status?

A: All parts are in stock: 3B2UM (1136 pcs), 3D2UM (1005 pcs), 3E2UM (809 pcs), and 3G2UM (935 pcs).