Newb Asks: How can a 120 amp Contactor carry more current?
Posted: Mon Feb 07, 2022 5:07 pm
forgive me if this belongs in the Getting Started sub forum
I recently tore into bits the BMW 530e Safety Box (ie pre charge circuit container) and found two Panasonic AEV14012 Relays/Contactors call them what you will rated at 400 volts (I'm fine with this spec) but only 120 amps, if I am reading the specs correctly on Digi-Key
I realize there is a big Info on BMW hybrid battery packs? thread and the answer may be buried in it somewheres, but this is more of a general learn me something question. How can this be? I know gals are pulling more current in their conversions than 120 amps through these contactors, upwards of twice as much (think pairing them up with the Lexus GS450h transmotor). So what prevents these from arcing or welding themselves shut? Please take it easy in your explanation as I am a total novice and any time I think I know something I get [ahem] a little shocked.
I recently tore into bits the BMW 530e Safety Box (ie pre charge circuit container) and found two Panasonic AEV14012 Relays/Contactors call them what you will rated at 400 volts (I'm fine with this spec) but only 120 amps, if I am reading the specs correctly on Digi-Key
I realize there is a big Info on BMW hybrid battery packs? thread and the answer may be buried in it somewheres, but this is more of a general learn me something question. How can this be? I know gals are pulling more current in their conversions than 120 amps through these contactors, upwards of twice as much (think pairing them up with the Lexus GS450h transmotor). So what prevents these from arcing or welding themselves shut? Please take it easy in your explanation as I am a total novice and any time I think I know something I get [ahem] a little shocked.