BUX63 Dimensions in mm (inches). 3.68 (0.145) rad. max. 6.35 (0.250) 8.64 (0.340) 3.61 (0.142) 4.08(0.161) rad. Bipolar NPN Device in a Hermetically sealed TO66 Metal Package. 11.94 (0.470) 12.70 (0.500) 24.13 (0.95) 24.63 (0.97) 1 14.48 (0.570) 14.99 (0.590) 2 0.71 (0.028) 0.86 (0.034) Bipolar NPN Device. VCEO = 325V IC = 5A All Semelab hermetically sealed products can be processed in accordance with the requirements of BS, CECC and JAN, JANTX, JANTXV and JANS specifications 4.83 (0..