What stands out about the relay is the INDUSTRIAL MRO brand, familiar in many plants.
STAHL 9001/51-280-091-141 20-35V NSMP
A Phase Sequence Relay is built in, which is a nice touch for anyone wiring three phase gear.
You will find that the brand is NOFUEL, and it looks consistent with other items in the lineup.
You will find that the Relay Bypass Switch Kit helps keep things steady during long test sessions.
A nice touch is the way the SEL branding lines up neatly on the side, giving a tidy appearance.
You will find that a protection relay is included, which helps reduce risk by reacting to faults quickly.
You will find that the Eaton brand gives this relay a dependable feel in everyday control setups.
A nice touch is that Phoenix Contact relays often pair well with standard sockets, saving you from hunting for special parts.
I keep a few MAS50MV units on hand because the part number is easy to remember.
You will find that the relay is completely plug and play, making setup quick and stress free for anyone.