It’s a contactor relay, and that extra muscle is a nice touch for powering larger devices safely.
GE Type IAC Time Overcurrent Relay 12IAC53B812A Very Inverse Time 1.5-12A Used
When you open it, you will find that it is the SRD-12VDC-SL-C model.
What stands out about this unit is that it's a contactor relay, which makes handling high current much easier.
A nice touch is that the Digital Loggers brand tends to have straightforward documentation for your reference.
For this unit, what stands out about the motor starting relay is how smoothly it engages the pump at startup.
This power relay helps when you want to keep high power parts away from delicate circuits.
You will find that the FTR-F3 model feels solid and fits well in most control panels.
I keep coming back to the model 301-1C-C-R1 U01 12VDC for steady results.
What stands out about this Omron relay is how smoothly it integrates into compact control panels.
A nice touch is the way the protection relay keeps an eye on your system and steps in when needed.