Frequently asked questions
What is the backup protection device for MAX9 SPD?
FAQ000222859
20 June 2025
We recommend using MAX9 MCB backup protection device for MAX9 SPD.You can use 1P 40A MCB (MX9MC140) for 1P SPD (MX9SP140), and 3P 40A MCB (MX9MC340) for 3P SPD
(MX9SP340).
