The Power Relay/Battery Isolator engages smoothly, and you can hear a reassuring click at each cycle.
2Pcs 871-1C-C-R1 U01 35/20A 12VDC Automotive Relay Micro 280 SPDT 5Pins
A nice touch is the DIN-rail housing, which makes swapping the relay later a lot less frustrating.
A nice touch is the auto-off and timer, and you can set it to shut down after a certain period.
With this 500A size, you get a stronger build, and it looks right at home next to beefy components.
The CSJ-38-70010 pairs nicely with socket bases, which makes swaps quick during maintenance.
A nice touch is the 70*20*18mm / 2.75*0.78*0.7" dimension that fits standard brackets.
A nice touch is how the unbranded brand uses a bright indicator LED, so you know at a glance when it's active.