Electrical Durability of Contacts
Durability (inductive load) = durability (resistive load) x reduction coefficient.
Resistive AC load
Switching capacity (kVA)
Durability (Number of operating cycles)
Reduction coefficient for inductive AC load (depending on power factor cos ϕ)
Reduction coefficient (A)
Maximum switching capacity on resistive DC load
Note : These are typical curves, actual durability depends on load, environment, duty cycle, etc.