SHD203/40 is a three-pole isolator switch disconnector, also known as a disconnect switch.
"40" in the model number indicates the maximum rated current of the switch disconnector, which in this case is 40 amperes.
"3P" designation signifies that the switch disconnector has three poles. In electrical terminology, a pole refers to a set of contacts that opens or closes the circuit.
SHD203/40 may feature an enclosed design, providing protection for the internal components against environmental factors such as dust, moisture, and accidental contact.
switch disconnector is equipped with a handle that allows users to manually operate the switch, turning it on or off as needed.