This part is a kind of semiconductor called 1N5956B.

Function of this product has ZENER DIODE.

Manufacturers : RFE

Image and pinout :

Some of the text within the PDF file :

ZENER DIODE 1N5913B Thru 1N5956B RoHS 1.5 Watts MECHANICAL DATA • Case: DO-41, Plastic body, UL 94V-0 rated • Terminals: Solderable per MIL-STD-202, Method 208 • Polarity: Cathode Band • Marking: Type Number • Weight: 0.339 grams MAXIMUM RATINGS & ELECTRICAL CHARACTERISTICS 0.107 (2.7) 0.080 (2.0) 0.034 (0.86) 0.028 (0.71) 1.00 (25.4) MIN. 0.205 (5.2) 0.166 (4.2) 1.00 (25.4) MIN. Item Symbol Conditions Value Max Unit Power Dissipation at Tamb = 25°C Note 1 Zener Current Ptot -- IZ See Characteristics Table 1.5 -- -- W -- mA Maximum Junction Temperature Tj -- 150 -- °C Storage Temperature Range Tstg -- -55 to +150 -- °C Thermal Resistance Junction to Lead Note 1 ROJL -- -- 45 °C / W Forward voltage VF IF= 200mA -- 1.2 V DO-41 Dimensions in inche [ ... ]

1N5956B PDF Datasheet Download