I want to use SPST relay to control resistive load as well as inductive load i.e. ceiling Fan (Load<150W).
I used the 5VDC relay (HF46F-G) which is capable of 7A current, 250VAC.
As we know, P=VI so that we can control the appliances which power rating is 1000W with this relay (P=230V*4.5A = 1035W; current is less than 7A)
- then why datasheet says that its maximum switching power is 300W?
- What does it exactly mean?
- What would happen if I switch the appliance which is 1000W rated?
- Is ceiling fan (Inductive load <150W) control safe (arching, relay health perspective) with this relay?
We can safely control the appliances rated below 300W which means safe rating is 1.3A current if voltage=230V and 7A means that relay can handle the sudden peak up to 7A without any damage if it happen.
And if load is greater than 300W then arching chance increase more and relay life become shorter.