This part is a kind of semiconductor called 1N5062.

Function of this product has GLASS PASSIVATED JUNCTION RECTIFIER.

Manufacturers : General Semiconductor

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Some of the text within the PDF file :

1N5059 THRU 1N5062 GLASS PASSIVATED JUNCTION RECTIFIER Reverse Voltage - 200 to 800 Volts D TE * DO-204AP Forward Current - 1. 0 Ampere FEATURES ♦ High temperature metallurgically bonded construction ♦ 1.0 Ampere operation at TA=75°C with no thermal runaway ♦ Typical IR less than 0.1µA ♦ Hermetically sealed package ♦ Glass passivated cavity-free junction ♦ Capable of meeting environmental standards of MIL-S-19500 ♦ High temperature soldering guaranteed: 350°C/10 seconds 0.375” (9.5mm) lead length, 5 lbs. (2.3kg) tension TE A P N 0.034 (0.86) 0.028 (0.71) DIA. 1.0 (25.4) MIN. 0.240 (6.1) MAX. 0.150 (3.8) 0.100 (2.5) DIA. 1.0 (25.4) MIN. MECHANICAL DATA Case:JEDEC DO-204AP solid glass body Terminals: Solder plated axial leads, solderable per MIL-STD-750, Method 202 [ ... ]

1N5062 PDF Datasheet Download