KTY81/110 - KTY81/120 plastic near cylindrical single-ended package; 2 in-line leads KTY81/121 KTY81/122 KTY81/150 KTY81/210 KTY81/220 KTY81/221 KTY81/222 KTY81/250 Version SOD70 4. Marking KTY81_SER_5 Product data sheet Table 4.