bc303THE BC303, BC304 ARE PNP SILICON PLANAR EPITAXIAL. TRANSISTORS RECOMMENDED BC303 only. 85. V. Collector Cutoff Current. Emitter Cutoff Current.THE BC303, BC304 ARE PNP SILICON PLANAR EPITAXIAL. TRANSISTORS RECOMMENDED BC303 only. 85. V. Collector Cutoff Current. Emitter Cutoff Current.