I have already looked at this question which looked like it would provide the answer:

How to choose a flyback diode for a relay?

But it didn't, so I also checked out these:

• http://electronics.stackexchange.com/questions/ask
• Flyback Diodes and Relays
• http://electronics.stackexchange.com/questions/163104/what-are-important-parameters-for-a-flyback-diode
• Suppression diode for relays in ULN2803A
• http://electronics.stackexchange.com/questions/136896/pwm-and-flyback-diode-dependency

Which didn't either. So my question is:

When selecting a flyback diode for a relay, how can I determine whether the speed of the diode is adequate for the application?

I am not looking for diode suggestions, but rather:

1. What specifications in the datasheet for a diode I would need to look at
2. How I can calculate the required values from 1. , given whatever information is needed about the circuit that controls the relay coil, and the specs of the relay.

I presume it has to do with capacitances in the diode's datasheet among other things.

Thanks

Edit: to clarify, I don't mind if the relay takes some time to turn off. What I am concerned with is ensuring protection of the controlling circuitry from the spike the coil generates when current to it from the controlling circuitry ceases.

I have already looked at this question which looked like it would provide the answer:

How to choose a flyback diode for a relay?

But it didn't, so I also checked out these:

• https://electronics.stackexchange.com/questions/ask
• Flyback Diodes and Relays
• https://electronics.stackexchange.com/questions/163104/what-are-important-parameters-for-a-flyback-diode
• Suppression diode for relays in ULN2803A
• https://electronics.stackexchange.com/questions/136896/pwm-and-flyback-diode-dependency

Which didn't either. So my question is:

When selecting a flyback diode for a relay, how can I determine whether the speed of the diode is adequate for the application?

I am not looking for diode suggestions, but rather:

1. What specifications in the datasheet for a diode I would need to look at
2. How I can calculate the required values from 1. , given whatever information is needed about the circuit that controls the relay coil, and the specs of the relay.

I presume it has to do with capacitances in the diode's datasheet among other things.

Thanks

Edit: to clarify, I don't mind if the relay takes some time to turn off. What I am concerned with is ensuring protection of the controlling circuitry from the spike the coil generates when current to it from the controlling circuitry ceases.

I have already looked at this question which looked like it would provide the answer:

How to choose a flyback diode for a relay?

But it didn't, so I also checked out these:

• http://electronics.stackexchange.com/questions/ask
• Flyback Diodes and Relays
• http://electronics.stackexchange.com/questions/163104/what-are-important-parameters-for-a-flyback-diode
• Suppression diode for relays in ULN2803A
• http://electronics.stackexchange.com/questions/136896/pwm-and-flyback-diode-dependency

Which didn't either. So my question is:

When selecting a flyback diode for a relay, how can I determine whether the speed of the diode is adequate for the application?

I am not looking for diode suggestions, but rather:

1. What specifications in the datasheet for a diode I would need to look at
2. How I can calculate the required values from 1. , given whatever information is needed about the circuit that controls the relay coil, and the specs of the relay.

I presume it has to do with capacitances in the diode's datasheet among other things.

Thanks

I have already looked at this question which looked like it would provide the answer:

How to choose a flyback diode for a relay?

But it didn't, so I also checked out these:

• http://electronics.stackexchange.com/questions/ask
• Flyback Diodes and Relays
• http://electronics.stackexchange.com/questions/163104/what-are-important-parameters-for-a-flyback-diode
• Suppression diode for relays in ULN2803A
• http://electronics.stackexchange.com/questions/136896/pwm-and-flyback-diode-dependency

Which didn't either. So my question is:

When selecting a flyback diode for a relay, how can I determine whether the speed of the diode is adequate for the application?

I am not looking for diode suggestions, but rather:

1. What specifications in the datasheet for a diode I would need to look at
2. How I can calculate the required values from 1. , given whatever information is needed about the circuit that controls the relay coil, and the specs of the relay.

I presume it has to do with capacitances in the diode's datasheet among other things.

Thanks

Edit: to clarify, I don't mind if the relay takes some time to turn off. What I am concerned with is ensuring protection of the controlling circuitry from the spike the coil generates when current to it from the controlling circuitry ceases.