2G03UM Circuit Breaker - Equivalent & Substitute Parts

Part Overview

The 2G03UM is a thermal magnetic circuit breaker manufactured by Altech Corporation, rated for 300mA at 480V AC / 80V DC with lever actuation and DIN Rail mounting. This component is classified as Active product status with full CSA and UL508 approval. Substitute parts are identified when equivalent electrical and mechanical parameters are required for design flexibility, inventory management, or supply chain continuity while maintaining identical functional specifications.

Substiute Parts

2G03UM

Altech CorporationIn Stock: 7512G03UM Datasheet

Current PartRFQ

2E03UM

Altech CorporationIn Stock: 8482E03UM Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

The 2E03UM qualifies as a parametric equivalent to the 2G03UM based on the following matching electrical and mechanical parameters:

• Identical current rating: 300mA
• Identical voltage ratings: 480V AC and 80V DC
• Identical breaker type: Thermal Magnetic
• Identical mounting configuration: DIN Rail
• Identical actuator type: Lever
• Identical pole count: 2 poles
• Identical approval certifications: CSA, UL508
• Identical series classification: V-EA

Both parts share the same base electrical performance envelope and mechanical interface requirements, establishing direct substitution eligibility.

Parameter Comparison

Engineering Selection Recommendations

Both the 2G03UM and 2E03UM are Active status products with identical regulatory compliance certifications (CSA, UL508) and environmental compliance classifications (ROHS3 Compliant, REACH Unaffected). Selection between these parts is determined by availability and inventory status rather than technical performance differentiation. The 2E03UM currently maintains higher inventory availability (763 Pcs) compared to the 2G03UM (681 Pcs), both in new original condition. Either part satisfies the electrical and mechanical requirements for 300mA thermal magnetic circuit breaker applications on DIN Rail installations rated for 480V AC / 80V DC operation.

Frequently Asked Questions (FAQ)

Q: Can the 2E03UM directly replace the 2G03UM in existing installations?

A: Yes. Both parts share identical electrical ratings (300mA, 480V AC, 80V DC), breaker type (thermal magnetic), mounting configuration (DIN Rail), and regulatory approvals (CSA, UL508). No circuit modifications or recertification is required.

Q: What is the difference between the 2G03UM and 2E03UM part numbers?

A: The part numbers reflect different base product designations (2G03 versus 2E03) within the V-EA series. All specified electrical and mechanical parameters are identical, establishing functional equivalence.

Q: Are both parts available in the same packaging format?

A: Both parts are supplied in Bulk packaging. Verify specific quantity requirements with your supplier based on application needs.

Q: Do these parts carry the same regulatory certifications?

A: Yes. Both the 2G03UM and 2E03UM carry CSA and UL508 approvals and are ROHS3 Compliant with REACH Unaffected status.

Q: Which part should be selected for new designs?

A: Either part is suitable for new designs. Selection should be based on current inventory availability, lead time, and supplier preference, as all technical specifications are equivalent.