I did some research after posting the idea of what I needed and I understand better now (I assume) What I was looking was for a relay with the signal coil to be 48V and the contact switch has to be able to support 100A 110VAC or 50A 220VAC so either a single or double contact depending whether I will use a 110V or 220V power source. I am doing 50% above nominal that is why Amps are so high but I am looking for reliable and long lasting.what kind of source is 100VAC and can supply 100A?
btw. you want o make sure that your product is properly sized. normally at least 20% above the nominal. And probably more for devices that store energy or are nonlinear (that includes any charger/rectifier).
btw. i have used many different relays and contactors and product ratings are sometimes apples and oranges.
for example an AB relay 100-C series, rated for just 9A will easily outperform Omron relay G9L... rated for 10A when same (over)current goes through their contacts. G9 will always have contacts weld before 100C has same defect. Products manufactured in different parts of world simply have different safety margins and looking at the product it is clear that 100C is obviously larger. the current rating is simply more conservative..
contactors and relays serve basically same function but construction is different.
for large loads i would rather go with a contactor or maybe an SSR (quiet option)
It will be feeding a battery charger for lithium batteries 55V 60A the charger has an input of 220V AC24VDC is far more common as that is what industry runs on - practically every machine in every plant in every country is using IO and controls that run on 24V. This is why they are so common. but products with different coil voltage including 48V are available too. product you are after will have a pretty large coil. it will definitely need suppression (diode across coil) or whatever is feeding will be smoked the moment that coil is de-energized.
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by Aaron Carman