3G4UM Circuit Breaker - Equivalent & Substitute Parts

Part Overview

The 3G4UM is a thermal magnetic circuit breaker manufactured by Altech Corporation, rated for 4A at 480V AC / 80V DC with lever actuation and DIN rail mounting. This three-pole breaker is part of the V-EA series and holds active product status with CSA and UL508 approvals. Substitute parts are identified when identical electrical and mechanical parameters are maintained across the same product category, enabling direct replacement in applications where the original part number becomes unavailable or inventory constraints require alternative sourcing.

Substiute Parts

3G4UM

Altech CorporationIn Stock: 10883G4UM Datasheet

Current PartRFQ

3D4UM

Altech CorporationIn Stock: 7293D4UM Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

The 3D4UM is classified as a parametric equivalent to the 3G4UM based on matching electrical and mechanical specifications. Substitution eligibility is determined by the following criteria:

• Current Rating: 4A (identical)
• Voltage Rating - AC: 480V (identical)
• Voltage Rating - DC: 80V (identical)
• Breaker Type: Thermal Magnetic (identical)
• Number of Poles: 3 (identical)
• Actuator Type: Lever (identical)
• Mounting Type: DIN Rail (identical)
• Series: V-EA (identical)

The primary distinction between these parts lies in their thermal-magnetic characteristic curves (G-characteristic vs. D-characteristic), which define trip response times under fault conditions. Both parts maintain identical electrical ratings and physical form factors, permitting direct substitution in applications where the specific characteristic curve requirement is not a limiting design constraint.

Parameter Comparison

Engineering Selection Recommendations

Both the 3G4UM and 3D4UM maintain active product status and comply with identical regulatory frameworks (CSA, UL508). The 3D4UM carries additional VDE certification, extending its approval scope for European applications. Both parts are ROHS3 compliant and REACH unaffected, meeting current environmental and hazardous substance restrictions.

Selection between these parts should be based on application-specific requirements for thermal-magnetic trip characteristics. The G-characteristic (3G4UM) and D-characteristic (3D4UM) define distinct response profiles under overload and short-circuit conditions. Electrical ratings, physical dimensions, and DIN rail compatibility are identical, ensuring mechanical and electrical interchangeability within the specified voltage and current parameters.

Frequently Asked Questions (FAQ)

Q: Can the 3D4UM directly replace the 3G4UM in existing installations?

A: Direct replacement is possible from an electrical and mechanical standpoint, as both parts share identical current ratings (4A), voltage ratings (480V AC / 80V DC), pole configuration (3-pole), and DIN rail mounting. The difference in thermal-magnetic characteristic curves (G vs. D) may affect trip response times under fault conditions; application requirements must be evaluated to confirm compatibility.

Q: What is the difference between G-characteristic and D-characteristic breakers?

A: Characteristic curves define the relationship between fault current magnitude and trip time. This information is provided in the part descriptions; specific trip time parameters are not included in this reference and should be obtained from manufacturer datasheets for detailed comparison.

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

A: Both the 3G4UM and 3D4UM are supplied in bulk packaging, consistent with DIN rail mounted circuit breaker distribution standards.

Q: Do both parts meet the same regulatory approvals?

A: Both parts hold CSA and UL508 certifications. The 3D4UM additionally carries VDE approval, providing broader geographic compliance for European markets.

Q: What inventory status should be considered for procurement?

A: The 3G4UM has 1001 pieces in stock, while the 3D4UM has 668 pieces in stock. Both are listed as new original inventory.