SMAJ4744E3/TR13

SMAJ4728A thru SMAJ4751A Transient Voltage Suppressor Breakdown Voltage 3.3 to 30 Volts Features CASE: SMA (DO214AC)       Extensive Voltages selection from 3.3 to 30V Silicon 2.0 Watt Zener Diodes Ideal for high-density and low-profile mounting Regulates voltage over a broad operating current and temperature range Flexible axial-lead mounting terminals High specified maximum current(IZM) when adequately heat sinking 效 无  Application  Use in sensitive electronics protection against voltage transients induced by inductive load switching and lighting on ICS, MOSFE, signal lines of sensor units for consumer, computer, industrial, automotive and telecommunication 印 打  Mechanical Data      Dimensions in inches and (millimeters) Case: Void-free transfer molded thermosetting epoxy body meeting UL94V-O Terminals: Tin-Lead or ROHS Compliant annealed matte-Tin plating readily solderable per MIL-STD-750, Method 2026 Marking: Body marked with part number Polarity: Cathode indicated by band Weight: 0.3g（Approximately） Maximum Ratings and Electrical Characteristics @ Symbol PM(AV) Conditions Steady state maximum power dissipation 25OC unless otherwise specified Value Unit 2.0 W SEE TABLE1 A Izsm Peak surge current VF Maximum instantaneous forward voltage at 200mA 1.2 V Thermal resistance junction to lead 25 ℃/W -65 to +150 ℃ RθJL TJ, TSTG Operating and Storage Temperature Document Number: SMAJ4728A thru SMAJ4751A Feb.29, 2012 www.smsemi.com 1 SMAJ4728A thru SMAJ4751A Electrical Characteristics @ 25°C (Unless Otherwise Noted) TABLE1 Part Number SMAJ4728A SMAJ4729A SMAJ4730A SMAJ4731A SMAJ4732A SMAJ4733A SMAJ4734A SMAJ4735A SMAJ4736A SMAJ4737A SMAJ4738A SMAJ4739A SMAJ4740A SMAJ4741A SMAJ4742A SMAJ4743A SMAJ4744A SMAJ4745A SMAJ4746A SMAJ4747A SMAJ4748A SMAJ4749A SMAJ4750A SMAJ4751A Test Current Maximum Dynamic Impedance ZZT @ IZT Maximum Knee Impedance ZZk @ IZk Knee Current VZ (V) IZT (mA) ZZT (OHMS) ZZK (OHMS) IZK (mA) IR (µA) 3.3 3.6 3.9 4.3 4.7 5.1 5.6 6.2 6.8 7.5 8.2 9.1 10.0 11.0 12.0 13.0 15.0 16.0 18.0 20.0 22.0 24.0 27.0 30.0 76.0 69.0 64.0 58.0 53.0 49.0 45.0 41.0 37.0 34.0 31.0 28.0 25.0 23.0 21.0 19.0 17.0 15.5 14.0 12.5 11.5 10.5 9.5 8.5 10.0 10.0 9.0 9.0 8.0 7.0 5.0 2.0 3.5 4.0 4.5 5.0 7.0 8.0 9.0 10.0 14.0 16.0 20.0 22.0 23.0 25.0 35.0 40.0 400 400 400 400 500 550 600 700 700 700 700 700 700 700 700 700 700 700 750 750 720 750 750 1000 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 0.50 0.50 0.50 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 Zener Voltage VZ @ IZT Maximum Regulator Current TL= 100°C Maximum Surge Current VR (V) IZM (mA) Izsm (mA) 1.0 1.0 1.0 1.0 1.0 1.0 2.0 3.0 4.0 5.0 6.0 7.0 7.6 8.4 9.1 9.9 11.4 12.2 13.7 15.2 16.7 18.2 20.6 22.8 552 504 468 434 386 356 324 292 266 242 220 200 182 166 152 138 132 114 100 90 82 76 68 60 1380 1260 1190 1070 970 890 810 730 660 605 550 500 454 414 380 344 304 285 250 225 205 190 170 150 Maximum Reverse Current IR @ VR 印 打 效 无 Note: 1. The type numbers shown with an A suffix have a 5% tolerance on nominal zener voltage. No suffix signifies a 10% tolerance, C signifies 2%, and D signifies 1% tolerance. 2. The Zener impedance is derived from the 60 HZ ac voltage ,which results when an ac current having an rms value equal to 10% of the dc Zener current (IZT or IZK ) is superimposed on IZT or IZK. Zener impedance is measured at two points to insure a sharp knee on the breakdown curve and eliminate unstable units. 3. The reverse surge current is measured at 25°C ambient using a 1/2 square wave or equivalent sine wave pulse 1/120 second duration superimposed on IZT. 4. Voltage at thermal equilibrium or 90seconds after application of dc current. Document Number: SMAJ4728A thru SMAJ4751A Feb.29, 2012 www.smsemi.com 2