Darlington's

Product Price
Optoisolator with Darlington Driver - 1 Channel Opto-isolator with Darlington pair for controlling large loads. This 4-pin dip can be used in conjunction with relays, small... $1.59
Darlington Driver 8-Channel ULN2803 DIP 8 Darlington Arrays in 18-Pin DIP Package part # ULN2803A. Perfect for running relays and high-power devices up to 500mA and up... $2.21