The 2SD871 Horizontal Deflection Transistor 6 Amp 1500v 50w can replace the 2sd869, 2sd870 and 2SD898B because its rated the same or higher than them. TO-3 Package. This is a HOT high output transistor for many different monitor chassis. Used on monitor chassis such as GO7 X01, Sanyo 20EZV Q902, Wells Gardner K4900 (Q352), Wells Gardner K4800, Red Tent, Atari Disco monitor at Q902. and may other models and sizes of arcade monitor chassis. This transistor will substitute for the 2SD900B, 2SD900D, 2SD819, 2SC1413A, 2SC1413AV, 7696, B2L, 48S137570, 2SD993A, 2SC1894, ECG89 and NTE89 since its higher rated than both of them.