Hi, @DanGB
What is your project?
What does the solenoid do and why 50ms?
What is the spec of your solenoid?
Are you sure that a relay can operate that quickly?
Tom.... 
Hi, @DanGB
What is your project?
What does the solenoid do and why 50ms?
What is the spec of your solenoid?
Are you sure that a relay can operate that quickly?
Tom....