What stands out about the unbranded brand is the lack of logos, keeping the look consistent with other anonymous hardware.
1PC for TSR-40DA MGR-3 032 3840Z DC-AC Three-phase 380VAC Solid State Relay
You will find that this unbranded relay fits standard sockets, and the metal tabs feel secure and nicely finished.
A nice touch is the smooth spring action inside this unbranded relay, which feels reliable without being too stiff.
A nice touch is how the unbranded brand uses a bright indicator LED, so you know at a glance when it's active.