3C8UM 8A Circuit Breaker Equivalent & Substitute Parts

Part Overview

The 3C8UM is a thermal magnetic circuit breaker manufactured by Altech Corporation, part of the V-EA series. This DIN rail-mounted breaker is designed for 8A applications at 480V AC and 80V DC with a 3-pole lever actuator configuration. The product is currently active and widely available in inventory. Substitute parts may be required due to supply constraints, regional availability, or specific application requirements where alternative thermal magnetic characteristics are acceptable within the defined electrical and mechanical parameters.

Substiute Parts

3C8UM

Altech CorporationIn Stock: 10523C8UM Datasheet

Current PartRFQ

3D8UM

Altech CorporationIn Stock: 9883D8UM Datasheet

Parametric EquivalentRFQ

3G8UM

Altech CorporationIn Stock: 9723G8UM Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

The 3C8UM has two parametric equivalents: 3D8UM and 3G8UM. Substitution eligibility is determined by matching the following critical parameters: current rating (8A), voltage ratings (480V AC / 80V DC), breaker type (thermal magnetic), mounting configuration (DIN rail), pole count (3), and actuator type (lever). All three parts belong to the Altech V-EA series and maintain identical electrical and mechanical specifications. The primary distinction between these parts lies in their thermal magnetic characteristic curves (C, D, and G designations), which define trip response times under fault conditions. Parts are interchangeable when the application permits operation across the specified characteristic curve range.

Parameter Comparison

Engineering Selection Recommendations

All three parts maintain active product status and full regulatory compliance. The 3C8UM and 3D8UM both carry CSA, UL508, and VDE approvals, while the 3G8UM carries CSA and UL508 approvals. Selection between these parts should be based on application-specific requirements for thermal magnetic trip characteristics and regional certification requirements. The 3C8UM offers the highest current inventory level at 967 pieces. All parts are ROHS3 compliant and REACH unaffected, meeting environmental regulatory standards. Substitution is valid when the application circuit design accommodates the characteristic curve differences inherent to each part designation.

Frequently Asked Questions (FAQ)

Q: Can 3D8UM replace 3C8UM in an existing installation? A: Yes, provided the application permits operation with D-characteristic thermal magnetic response. Both parts share identical electrical ratings (8A, 480V AC, 80V DC), mounting configuration (DIN rail), pole count (3), and actuator type (lever). Verification of circuit design compatibility with the D-characteristic curve is required.

Q: What is the difference between C, D, and G characteristic designations? A: These designations define the thermal magnetic trip response curve. The characteristic curve determines the current threshold and time delay before the breaker trips under fault conditions. Selection depends on the specific load characteristics and protection requirements of the circuit.

Q: Are all three parts suitable for the same voltage and current applications? A: Yes. All three parts are rated for 8A at 480V AC and 80V DC. Electrical compatibility is confirmed across all three part numbers.

Q: Does the 3G8UM have the same certifications as the 3C8UM? A: The 3G8UM carries CSA and UL508 approvals. The 3C8UM carries CSA, UL508, and VDE approvals. Applications requiring VDE certification must use 3C8UM or 3D8UM.

Q: Are these parts available in different packaging options? A: All three parts are supplied in bulk packaging. No alternative packaging configurations are provided for this product line.

Q: What is the lead time for substitute parts? A: Current inventory levels are 967 pieces for 3C8UM, 883 pieces for 3D8UM, and 879 pieces for 3G8UM. Availability should be confirmed with the supplier for specific delivery requirements.