Component Options for Relay Coil Surge Suppression - Design Tools and Resources - Electronic Component and Engineering Solution Forum - TechForum │ Digi-Key
flyback - Can a Zener diode that protects a switch against inductance when the switch opens, affect turn on speed of the valve when you close it again? - Electrical Engineering Stack Exchange
How to choose a flyback diode for a relay? - Electrical Engineering Stack Exchange
Relays | mbedded.ninja
what is the purpose of the diode connected to the coil of the relay in the circuit - YouTube
Flyback diodes on relays to stop voltage spikes | The Garage Journal
Using Flyback Diodes in Relays Prevents Electrical Noise in Your Circuits | PCB Design Blog | Altium
Signals and Systems: Flyback/Freewheeling Diode
What is the utility of a freewheeling diode with a circuit? - Quora