What component could it be? Associated with Uponor C-35 controller. This starts with the Uponor C-37 thermostat, which has sometimes been discussed here. Could there be any fet switch 2 channel? SMD
Thermostat with display Uponor T-75 radio - PS Auction - We value the future - Largest in net auctions
Wired individual room temperature control 230 V | Uponor