The BCR 421U E6327 is a LED Driver can be operated with a supply voltage of more than 40V considering the voltage drop of the LED load which reduces the output voltage to the maximum rating of the driver. It can withstand a maximum voltage of 40V which can be increased adding a series resistor in front of the enable pin reducing the voltage at the enable pin below 40V. This LED driver is a solution for driving 0.25W LEDs with a typical LED current of 75 to 150mA. Internal breakdown voltage is higher than 40V which is the maximum voltage the LED driver can sustain when the output is directly connected to supply voltage.
