A9F74440 SCHNEIDER ELECTRIC

The A9F74440 from Schneider Electric's Acti9 series is a miniature circuit breaker (MCB) designed to protect electrical circuits from overcurrents caused by both overload and short circuits. This four-pole MCB is rated for 40 amps and 400 VAC, operating at 50/60 Hz. It features a C-curve tripping characteristic, making it suitable for applications with moderate inrush currents, such as lighting and general-purpose circuits. The A9F74440 utilizes thermal-magnetic trip technology, providing reliable and accurate protection against both thermal overloads and instantaneous short circuits. An integrated trip indicator clearly signals when the breaker has tripped, facilitating quick identification and resolution of faults. This MCB is designed to operate in a wide temperature range from -40 to +85 degrees Celsius, ensuring reliable performance in harsh environments. The Acti9 series is known for its robust construction and enhanced safety features. It is commonly used in residential, commercial, and industrial applications to protect electrical equipment and prevent damage from electrical faults. Its compact design allows for easy installation in distribution boards and consumer units.