Altech Corporation 3B3UM Circuit Breaker Equivalent & Substitute Parts

Part Overview

The 3B3UM is a thermal magnetic circuit breaker manufactured by Altech Corporation, rated for 3A at 480V AC and 80V DC with lever actuation on DIN rail mounting. This component is active in production and widely used in industrial control and distribution applications. Substitute parts become necessary due to inventory availability, supply chain considerations, or specific approval agency requirements across different regions and applications.

Substiute Parts

3B3UM

Altech CorporationIn Stock: 8493B3UM Datasheet

Current PartRFQ

3C3UM

Altech CorporationIn Stock: 7913C3UM Datasheet

Parametric EquivalentRFQ

3D3UM

Altech CorporationIn Stock: 10313D3UM Datasheet

Parametric EquivalentRFQ

3G3UM

Altech CorporationIn Stock: 7903G3UM Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

The 3B3UM circuit breaker has three parametric equivalents within the Altech V-EA series: 3C3UM, 3D3UM, and 3G3UM. All substitute parts maintain identical electrical and mechanical specifications:

• Current Rating: 3A
• Voltage Rating: 480V AC / 80V DC
• Mounting: DIN Rail
• Breaker Type: Thermal Magnetic
• Actuator: Lever
• Poles: 3
• Series: V-EA
• RoHS Compliance: ROHS3 Compliant

The primary distinction among these parts is the thermal magnetic characteristic curve designation (B, C, D, and G characters), which defines the trip point behavior under fault conditions. All parts share identical approval certifications (CSA, UL508) with the exception that 3C3UM and 3D3UM carry additional VDE approval.

Parameter Comparison

Engineering Selection Recommendations

All four circuit breaker models (3B3UM, 3C3UM, 3D3UM, 3G3UM) are active products with identical electrical ratings and mechanical form factors. Selection among these parts should be based on:

1. Thermal magnetic characteristic curve requirement (B, C, D, or G designation) as specified in the application circuit design
2. Regional approval requirements: 3C3UM and 3D3UM include VDE certification for European applications
3. Current inventory availability and supply lead times
4. Packaging requirements (all available in Bulk packaging)

All parts comply with ROHS3 and are REACH Unaffected, meeting current environmental compliance standards.

Frequently Asked Questions (FAQ)

Q: Can 3C3UM, 3D3UM, and 3G3UM be used interchangeably with 3B3UM?

A: These parts are parametric equivalents with identical electrical ratings (3A, 480V AC, 80V DC) and mechanical specifications (DIN rail mounting, 3-pole, lever actuation). Interchangeability depends on the specific thermal magnetic characteristic curve required by the application circuit. The letter designation (B, C, D, G) indicates the trip point curve; substitution is valid only when the application permits the alternative curve characteristic.

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

A: These designations define the thermal magnetic trip point behavior under fault conditions. The specific curve selection is determined by application requirements and circuit protection coordination. Consult application documentation to confirm which characteristic is required.

Q: Do all substitute parts have the same approvals?

A: 3B3UM and 3G3UM carry CSA and UL508 approvals. 3C3UM and 3D3UM carry CSA, UL508, and VDE approvals. For applications requiring VDE certification, only 3C3UM or 3D3UM are suitable.

Q: Are these parts available in different packaging options?

A: All parts listed are available in Bulk packaging. No alternative packaging formats are specified in the product data.

Q: What is the current inventory status?

A: 3B3UM: 834 Pcs, 3C3UM: 781 Pcs, 3D3UM: 946 Pcs, 3G3UM: 703 Pcs. All are listed as new original stock.