The 440R-E21357 safety relay, discontinued by the manufacturer on 12/31/2017, features a 2/4/6 AMP rating with operating voltages of 15-250 VAC and 13-24 VDC. It supports 50/60 Hz frequency at 3 watts, with a maximum ambient temperature of 55°C. This unit comes with a 2-year warranty from RADWELL (original factory warranty not applicable).