SEMICONDUCTOR DEVICES, DIODE, 50-WATT, SILCON, B AND RB TYPE, JAN-1N2804 THRU JAN-1N2811, JAN-1N2813, JAN-1N2814, JAN-1N2816, JAN-1N2818 THRU JAN-1N2820, JAN-1N2822 THRU JAN-1N2827, JAN-1N2829, JAN-1N2831 THRU JAN-1N2838, AND JAN-1N2840 THRU JAN-1N2846