A nice touch is that DEC relays fit standard sockets without any fuss or extra hardware.
2PCS DU1PU 18VDC DEC Power Relay 16A 250VAC 4 Pins NEW
A nice touch is that Phoenix Contact often includes helpful labeling, which can simplify troubleshooting when seems off.
You will find that the 4RD00779404 model number is printed, so there's no confusion about what you bought.
You will find that the Songle brand is familiar, and that familiarity can make testing and setup feel calmer.
What stands out about this item is the consistent Audiopipe branding throughout.
The General Purpose Relay keeps things simple for expanding outputs, and you will find that it integrates easily.
A nice touch is the readable part mark on the 40ISR model for quick inventory checks.
The Power Relay/Battery Isolator engages smoothly, and you can hear a reassuring click at each cycle.
You will find that this unbranded relay is quiet in operation, with minimal hum or buzz during long runs.
With DEC brand, the pin layout is intuitive, so wiring straightforward and less error prone.