The Schneider Electric Acti9 NG125L is a 4-pole miniature circuit breaker designed for robust electrical protection in demanding industrial environments. This specific model, identified by the part number 18863, is engineered for applications requiring high current interruption capabilities and features a D tripping curve for rapid response to significant inrush currents, making it suitable for circuits with substantial startup loads such as motors or transformers.

Technical details

• Series: Acti9 NG125L
• Poles: 4
• Tripping Curve: D
• Voltage Rating: Verify against manufacturer datasheet for specific voltage class (e.g., 230/400V AC).
• Current Rating: Verify against manufacturer datasheet for specific amperage (e.g., 125A).
• Interrupting Capacity: High, suitable for circuits with significant fault currents.
• Mounting Type: DIN rail mount.
• Terminal Type: Screw terminals.

Applications & compatibility

This circuit breaker is commonly deployed in power distribution panels, motor control centers, and electrical switchgear for protecting circuits in heavy machinery, industrial automation systems, and large-scale building infrastructure. Its D-curve characteristic makes it particularly well-suited for applications involving inductive loads that experience high initial current draws, such as pumps, fans, and compressors.

Available from Industrial Automation Co as new, refurbished, or surplus stock, backed by a 2-year warranty with same-day shipping on in-stock items. Request a quote for the Schneider 18863 or contact our technical team for cross-reference assistance with compatible Acti9 components.