Axial Leaded Glass Zener Diode  
					Comchip  
					S M D D i o d e S p e c i a l i s t  
					1N5221B-G Thru. 1N5267B-G  
					Voltage: 2.4 to 75 Volts  
					Power: 0.5 Watts  
					RoHS Device  
					DO-35  
					Features  
					-500mW power dissipation  
					1.02(26.00) Min.  
					-Stabilizing voltage.  
					0.165(4.20)Max.  
					Mechanical data  
					0.079(2.00)Max.  
					-Case: Glass, DO-35  
					1.02(26.00) Min.  
					-Polarity: Indicated by cathode band  
					0.022(0.55)Max.  
					Dimensions in inches and (millimeter)  
					Maximum Ratings (TA=25°C, unless otherwise noted)  
					Symbol  
					Parameter  
					Conditions  
					Value  
					500  
					Unit  
					mW  
					mA  
					Power dissipation  
					TL=25°C  
					Ptot  
					IZ  
					Zener current  
					Ptot/VZ  
					Junction temperature  
					Storage temperature range  
					TJ  
					175  
					°C  
					°C  
					TSTG  
					-65 to +175  
					Electrical Characteristics (TA=25°C, unless otherwise noted)  
					Symbol  
					Parameter  
					Thermal resistance (Note 1)  
					Forward voltage  
					Conditions  
					Max  
					300  
					1.1  
					Unit  
					°C/W  
					V
					junction to ambient air  
					L=4mm, TL=25°C  
					RθJA  
					IF=200mA  
					VF  
					Note: Based on dc-measurement at thermal equilibrium; lead length = 9.5 (3/8”); thermal resistance of heat sink =30°C/W  
					Company reserves the right to improve product design , functions and reliability without notice.  
					REV: C  
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					QW-BZ001  
					Comchip Technology CO., LTD.