TO-220 3-Lead Package Outline (Flow 41) (Reference LTC DWG # 05-08-1481) .147 – .155 (3.734 – 3.937) DIA .390 – .415 (9.906 – 10.541) .165 – .180 (4.191 – 4.572) .045 – .055 (1.143 – 1.397) .230 – .270 (5.842 – 6.858) HEAT SINK MOUNTING HOLE .600 .460 – .500 (11.684 – 12.700) .640 (16.256) MAX .570 – .620 (14.478 – 15.748) .010 ± .010 (0.254 ± 0.254) .330 – .370 (8.382 – 9.398) .045 ± .020 (1.143 ± 0.508) .053 (1.346) TYP .145 ± .010 (3.683 ± 0.254) .090 .070 .100 RECOMMENDED SOLDER PAD LAYOUT .100 (2.54) BSC .050 (1.270) TYP NOTE: CONTROLLING DIMENSIONS ARE IN INCHES .013 – .023 (0.330 – 0.584) .055 ± .010 (1.397 ± 0.254) T3 (FLOW 41) 0502