I scavenged a 4 terminal power switch (Legion EPS 21) from some electronic device (don't remember what it was) and it has the following markings on it:
Legion EPS21 10A 250VAC TV-5 8A/128A 250V µT85
I would like to use this as the main power switch for my robot which will have nothing higher than 12 volts and a "normal" total Amperage (i.e. with all the motors in it running) of around 25 Amps, but of course if a motor stalls then the current will rise much higher.
First of all I cannot understand how the same switch can be rated for different amperages. I cannot find any datasheets for this switch that might help nor any reference to the standards (TV-5 and µT85). So I would like to know if this can handle 128 Amps at 12 Volts. If it helps at all, the wires currently connected to the terminals are quite thick and have "18 AWG 600 volts" written on them.
Secondly I would like to ask whether I need to cater for normal running amperage levels or for stall current levels, which are obviously much higher. Although people talk about stall currents running over 100 Amps in some cases - which quite frankly cause me some concern - I cannot seem to be able to find any such switches on any robot component websites, so I am starting to think that it is the "normal" level of current I should plan for and not the "stall" one. Am I right in this?