View czrm5221b-thru-czrm5263b datasheet:

SMD Zener Diode CZRM5221B-HF Thru CZRM5263B-HF Voltage: 2.4 to 56 Volts Power: 500 mWatts RoHS Device Halogen Free SOD-123 Flat Lead Features - Surface Device Type Mounting. 0.146(3.70) 0.130(3.30) - Moisture Sensitivity Level 1. - Clip bonding construction, good thermal capability. 0.067(1.70) 0.028(0.70) 0.020(0.50) 0.059(1.50) - Ideally suited for automated assembly processes. 0.106(2.70) 0.098(2.50) Mechanical data 0.039(1.00) - Case: SOD-123 Flat Lead,Molded plastic. 0.008(0.20) 0.031(0.80) 0.002(0.05) - Terminals: Solder Plated,solderable per MIL-STD-750,method 2026. - Polarity: Cathode band. Dimensions in inches and (millimeter) Circuit Diagram Cathode Anode Maximum Ratings (@Ta=25°C unless otherwise specified) Symbol Parameter Value Un