The Schneider Surge Protection Arrester Device SPD 3P+N 4P 40kA A9L40601 is a reliable and efficient circuit breaker designed for any room in a commercial, industrial, or residential setting. With a maximum amperage of 40A and a smart home protocol of Clear Connect, this device offers superior protection against power surges and ensures a safe and stable electrical system. Schneider's reputation for quality and durability ensures that this arrester device will effectively safeguard your electrical equipment and supplies.