Surface Mount Zener Diodes COMCHIP www.comchip.com.tw CZRL4728 Thru CZRL4764 Voltage: 3.3 - 100 Volts Power: 1 Watt Features Glass MELF (LL35) Silicon Planar Power Zener Diodes For use in stabilizing and clipping circuits with higher power rating. Standard Zener voltage tolerance is ±10%. Add suffix “A” for ±5% tolerance. Other Zener voltages and tolerances are available upon request. 0.102 (2.6) 0.094 (2.4) Cathode Mark 0.022 (0.55) 0.205 (5.2) 0.189 (4.8) Mechanical data Case: MELF Glass Case Weight: approx. 0.25g Dimensions in mm Maximum Ratings and Electrical Characterics Parameter Zener Current (see Table “Characteristics”) Power Dissipation at Tamb = 25°C Symbol Value Unit Ptot 1.0(1) W Thermal Resistance Junction to Am bient Air Junction Temperature Storage Temperature Range R JA Tj TS (1) 170 200 –65 to +200 °C/W °C °C Note: (1) Valid provided that electrodes are kept at am bient temperature MDS0302003A Page 1 Surface Mount Zener Diodes COMCHIP www.comchip.com.tw Type No. CZRL4728 CZRL4729 CZRL4730 CZRL4731 CZRL4732 CZRL4733 CZRL4734 CZRL4735 CZRL4736 CZRL4737 CZRL4738 CZRL4739 CZRL4740 CZRL4741 CZRL4742 CZRL4743 CZRL4744 CZRL4745 CZRL4746 CZRL4747 CZRL4748 CZRL4749 CZRL4750 CZRL4751 CZRL4752 CZRL4753 CZRL4754 CZRL4755 CZRL4756 CZRL4757 CZRL4758 CZRL4759 CZRL4760 CZRL4761 CZRL4762 CZRL4763 CZRL4764 Maximum Zener Impedance (Note 1.) at Nominal Zener Voltage at IZT VZ (V) (Note 3.) Test current IZT (mA) ZZT at IZT (Ohm) 3.3 3.6 3.9 4.3 4.7 5.1 5.6 6.2 6.8 7.5 8.2 9.1 10 11 12 13 15 16 18 20 22 24 27 30 33 36 39 43 47 51 56 62 68 75 82 91 100 76 69 64 58 53 49 45 41 37 34 31 28 25 23 21 19 17 15.5 14 12.5 11.5 10.5 9.5 8.5 7.5 7 6.5 6 5.5 5 4.5 4 3.7 3.3 3 2.8 2.5 10 10 9 9 8 7 5 2 3.5 4 4.5 5 7 8 9 10 14 16 20 22 23 25 35 40 45 50 60 70 80 95 110 125 150 175 200 250 350 Max reverse Leakage Current at ZZK (Ohm) IZK (mA) IR (uA) VR (V) 400 400 400 400 500 550 600 700 700 700 700 700 700 700 700 700 700 700 750 750 750 750 750 1000 1000 1000 1000 1500 1500 1500 2000 2000 2000 2000 3000 3000 3000 1 1 1 1 1 1 1 1 1 0.5 0.5 0.5 0.25 0.25 0.25 0.25 0.25 0.25 0.25 0.25 0.25 0.25 0.25 0.25 0.25 0.25 0.25 0.25 0.25 0.25 0.25 0.25 0.25 0.25 0.25 0.25 0.25 100 100 50 10 10 10 10 10 10 10 10 10 10 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 1 1 1 1 1 1 2 3 4 5 6 7 7.6 8.4 9.1 9.9 11.4 12.2 13.7 15.2 16.7 18.2 20.6 22.8 25.1 27.4 29.7 32.7 35.8 38.8 42.6 47.1 51.7 56 62.2 69.2 76 Maximum Surge Regulator Current at Current TA = 25°C IZM (mA) Ir(mA) (Note 2.) 1380 1260 1190 1070 970 890 810 730 660 605 550 500 454 414 380 344 304 285 250 225 205 190 170 150 135 125 115 110 95 90 80 70 65 60 55 50 45 276 252 234 217 193 178 162 146 133 121 110 100 91 83 76 69 61 57 50 45 41 38 34 30 27 25 23 22 19 18 16 14 13 12 11 10 9 Notes: (1) The Zener impedance is derived from the 1KHZ AC volt age which results when an AC current having an RMS value equal to 10% of the Zener current (IZTor IZK) is superim posed on IZT or IZK. Zener impedance is m easured at two points to insure a sharp knee on the breakdown curve and to eliminate unstable units (2) Valid provided that electrodes at a distance of 10mm from case are kept at am bient temperature (3) Measured under thermal equilibrium and DC test condit ions. MDS0302003A Page 2 Surface Mount Zener Diodes COMCHIP www.comchip.com.tw Rating and Characteristic Curves (CZRL4728 Thru CZRL4764) Pd, POWER DISSIPATION (W) 1.0 0.8 0.6 0.4 0.2 0 0 100 200 TA, AMBIENT TEMPERATURE (°C) Fig. 1, Power Derating Curve CZRL4728~CZRL4764 MDS0302003A Page 3