Assmann wsw a usb absmt usb 20 sockets assmann wsw a usb bsmt this a usb bsmt usb 20 socket from assmann wsw is a usb b socket designed for printed circuit boards manufactured to a high standard and fitted with a brass shell t03 and nickel plated finish this right angled smd version offers 1000momega min insulation resistance plus a 500v ac withstanding voltage for one minute assmann wsw a usb bsmt usb 20 socket