How many switchings can a relay perform safely?
• The life of a relay depends on several factors such as: the connected load, either resistive or inductive, the supply voltage and how frequently the load is switched. The currents appearing on our controllers indicate the maximum switchable currents with a normal duty cycle for a period of at least 5 years. For example, with “normal duty” for a refrigeration thermostat, we mean a switching frequency of about 10 cycles/hour. Lower currents or lower switching frequency will cause a proportional extension of this lifetime.
