I want to use a relay to remotely switch a 48VDC 1A load (3A peak on startup with capacitive load), however, nearly all relays I have looked at specify a 30VDC maximum contact voltage. When searching Digikey, many parts state 125VDC, but the datasheet strongly derates the current at this maximum. The Omron G5LE for example specifies 8A at 30VDC, but derates to 3A at 50V in the Maximum Switching Capacity graph.
This relay might suite my needs at 48V, but my question is more general. If I need to switch a DC load up to 100V or so, how do I find a relay. There are high-voltage relays designed for >400V, but this seems to be a different specialty that the industrial control regime I am interested in.
Is a mechanically switched relay the right tool for switching loads of a few amps from 30V to 100V, or is there a better solution such as solid state relays?
In my specific case the load is a DCDC supply with a 1A 48V input and peak inrush current of 2.8A. However, this question generally applies to switching of intermediate voltage loads. Since 24V and 48V power supplies are common in industrial control, I assume that switching these is a pretty common requirement.