Reddit mentions of TinaWood 2PCS SSR-25DD Solid State Relay 25A 3-32V DC/5-200V DC (SSR-25DD x2) (DC to DC 25A x2)

Thanks for the response. Here is the diode spec:

https://www.mouser.com/ProductDetail/GeneSiC-Semiconductor/MBR200100CT?qs=sGAEpiMZZMtQ8nqTKtFS%2FHVp1T5850G0TwaW7MIEjcA%3D

Sorry allow me to clarify the problem a bit more. The load I am driving is a motor controller attached to a 3 phase BLDC motor. On shutdown the motor causes the voltage to rise steadily to 60V and then back down to 36V. This causes the power supplies to trip their OVP circuits which require a power cycle to clear the fault. The motor controller and motor were originally meant to run of a 36V battery. The circuit diagram is as show here: https://en.wikipedia.org/wiki/Flyback_diode

The flyback diode seemed to work when I initially switched on the + 36 VDC line going to a motor controller and a motor. The power supplies were separated from the inductive load kick and this allowed me to reconnect after the energy had been dissipated. I believe the issue with the flyback diode after my initial success was due to this SSR:

https://www.mouser.com/ProductDetail/Crydom/HDC100D160?qs=sGAEpiMZZMtyXJl6MftlF9Ozj4Qj0dXsoS3PeWG6bs8%3D

Although I am unsure why this is the case. I am currently debugging it. The issue now seems that the SSR does not turn off quick enough or allows too much voltage through before closing tripping the OVP on the power supplies. In my initial setup, where the system worked as expected, I was using these SSR:

https://www.amazon.com/TinaWood-SSR-25DD-Solid-State-5-200V/dp/B07F3WGRP4/ref=sr_1_2?keywords=tinawood&qid=1552598915&s=industrial&sr=1-2

One used to trigger the motor controller low power signal and one to switch the 36 V power. The system at no load draws around 8 - 15 A so using the 40 A version worked out fine. However, during full operation, the system would draw around 60 - 80 A with some peaks of 100 A. I thought the Crydom SSR would work for the power line switch. The diodes were working when I checked them with a multimeter.

Thanks again, would this be an acceptable relay to use.

https://www.amazon.com/HiLetgo-Channel-optocoupler-Support-Trigger/dp/B00LW15A4W/ref=pd_lpo_sbs_147_t_2?_encoding=UTF8&psc=1&refRID=G3S0E83TCCD6FZ78SFFW

or this one.

https://www.amazon.com/TinaWood-SSR-25DD-Solid-State-5-200V/dp/B07F3WGRP4/ref=sr_1_8?keywords=5+volt+dc+relay&qid=1566485708&s=gateway&sr=8-8