What stands out about this unit is the model 1-1618002-8, which helped me confirm it fits my setup.
Waterproof Relay with Wire Harness 5 PCS 12V 40/30A 5-Pin SPDT Automotive
After a week of testing, Action brand relays stayed stable without chatter drops.
If you check the specs, you will find that KUP-14D15-24=KU is printed right on the side.
The P7TFOS16 model is easy to spot on the shelf and even easier to use in a hurry.