Specing Point IO to drive 3w 24vdc pneumatic solenoids. Switching frequency is approx every 3.5 sec. Math puts that at .125 amps.
Debating between 1734-OW4 (relays rated at 2 amps) and 1734-OB8 (transistors rated at 1 amp).
I've read on here a rule of thumb that if the relay is rated for 10x the current of the solenoid it can generally handle the spike on opening. My question is because a transistor does not physically break the connection, can it manage the inductive spike better than relay contacts might?
If you were designing this would you choose one over the other? I'd prefer not to add interposing relays in the junction box this point IO is going to be in for simplicity and neatness, but will if the consensus is neither of these cards will last long.
Debating between 1734-OW4 (relays rated at 2 amps) and 1734-OB8 (transistors rated at 1 amp).
I've read on here a rule of thumb that if the relay is rated for 10x the current of the solenoid it can generally handle the spike on opening. My question is because a transistor does not physically break the connection, can it manage the inductive spike better than relay contacts might?
If you were designing this would you choose one over the other? I'd prefer not to add interposing relays in the junction box this point IO is going to be in for simplicity and neatness, but will if the consensus is neither of these cards will last long.