The 3UG4621-1AW30: The two adjustable current thresholds each cover 0.003 to 0.5 A, and the measurable range extends to 0.6 A — so the relay can be set to trip on either overcurrent or undercurrent within that span. The supply voltage accepts 20.4 to 264 V AC (50/60 Hz) or DC, which covers most standard control voltages from 24 V to 240 V without needing a separate power supply. Output contacts are rated 3 A at 250 V or 400 V AC, sufficient for signaling a PLC input or a contactor coil.
Snap-on mounting for 35 mm DIN rail, any orientation.