This part is a kind of semiconductor called 1N5230.
Function of this product has ZENER VOLTAGE REGULATOR DIODE IN HERMETIC CERAMIC SURFACE MOUNT PACKAGE FOR HIGH RELIABILITY APPLICATIONS.
Manufacturers : Seme LAB
Image and pinout :
Some of the text within the PDF file :
1N5221B-LCC3 TOB-LCC 1N5281B-LCC3 MECHANICAL DATA Dimensions in mm (inches) 5.59 ± 0.13 (0.22 ± 0.005) 0.25 ± 0.03 (0.01 ± 0.001) 1.40 ± 0.15 (0.055 ± 0.006) 0.64 ± 0.08 (0.025 ± 0.003) 0.23 rad. (0.009) 3 2 1.27 ± 0.05 (0.05 ± 0.002) ZENER VOLTAGE REGULATOR DIODE IN HERMETIC CERAMIC SURFACE MOUNT PACKAGE FOR HIGH RELIABILITY APPLICATIONS 0.23 min. (0.009) 3.81 ± 0.13 (0.15 ± 0.005) 4 1 FEATURES • Military Screening Options available 1.02 ± 0.20 (0.04 ± 0.008) 2.03 ± 0.20 (0.08 ± 0.008) 1 = CATHODE 2 = N/C 3 = N/C 4 = ANODE ABSOLUTE MAXIMUM RATINGS Tcase Tstg PTOT RTHJ-A Operating temperature Range Storage Temperature Range Power Dissipation TA = 25°C Thermal resistance (Junction to Ambient) -55 to +175°C -65 to +175°C 500mW 300°C/W ELECTRICAL CHARACTER [ ... ]