ST901T STD901T High voltage NPN Darlington transistor for ignition coil Features High voltage special Darlington structure TAB Very rugged bipolar technology TAB High DC current gain 3 1 Application 3 DPAK 2 1 High ruggedness electronic ignition for small TO-220 engines Description The device is a high voltage NPN transistor in Figure 1. Internal schematic diagram monolithic special Darlington configuration designed for applications such as electronic (2, TAB) C ignition for small engines (scooters, lawnmowers, chainsaws). B (1) E (3) Table 1. Device summary Order code Marking Packages Packaging ST901T 901T TO-220 Tube STD901T D901T DPAK Tape and reel February 2011 Doc ID 4510 Rev 5 1/12 www.st.com 12Contents ST901T, STD901T Contents 1 Electrical ratings 3 2 Electrical characteristics . 4 2.1 Electrical characteristics (curves) 5 3 Package mechanical data . 6 4 Revision history . 11 2/12 Doc ID 4510 Rev 5