Curve 1: Electrical durability of contacts on resistive load in millions of operating cycles

X Current broken in A

Y Millions of operating cycles

Curve 2: Reduction factor k for inductive loads (applies to values taken from durability Curve 1)

X Power factor on breaking (cos φ)

Y Reduction factor K

Load limit curve

X Current in A

Y Voltage in V

1 L/R = 20 ms

2 L/R with load protection diode

3 Resistive load