The 1N4728A THRU 1N4764A series are 1W Silicon Zener Diodes with a voltage range from 3.3 to 100 Volts. These diodes offer high surge capability (400 Watts at 1ms), fast response time (typically less than 1.0ps), low zener impedance, and excellent clamping capability. They are suitable for various applications requiring voltage regulation.
| PART NUMBER | ZENER VOLTAGE (V) NOM. | TEST CURRENT (mA) IZT1 | REVERSE LEAKAGE CURRENT (A) IR at VR | DYNAMIC RESISTANCE () ZZT at IZT1 | SURGE CURRENT (mA) IZM | REGULATOR CURRENT (mA) |
| 1N4728A | 3.3 | 76 | 1 | 1 | 400 | 1380 |
| 1N4729A | 3.6 | 69 | 1 | 1 | 400 | 1260 |
| 1N4730A | 3.9 | 64 | 1 | 1 | 400 | 1190 |
| 1N4731A | 4.3 | 58 | 1 | 1 | 400 | 1070 |
| 1N4732A | 4.7 | 53 | 1 | 1 | 500 | 970 |
| 1N4733A | 5.1 | 49 | 1 | 1 | 550 | 890 |
| 1N4734A | 5.6 | 45 | 2 | 2 | 600 | 810 |
| 1N4735A | 6.2 | 41 | 3 | 3.5 | 700 | 730 |
| 1N4736A | 6.8 | 37 | 4 | 3.5 | 700 | 660 |
| 1N4737A | 7.5 | 34 | 5 | 4 | 700 | 605 |
| 1N4738A | 8.2 | 31 | 6 | 4.5 | 700 | 550 |
| 1N4739A | 9.1 | 28 | 7 | 5 | 700 | 500 |
| 1N4740A | 10 | 25 | 7.6 | 7 | 700 | 454 |
| 1N4741A | 11 | 23 | 8.4 | 8 | 700 | 414 |
| 1N4742A | 12 | 21 | 9.1 | 9 | 700 | 380 |
| 1N4743A | 13 | 19 | 9.9 | 10 | 700 | 344 |
| 1N4744A | 15 | 17 | 11.4 | 14 | 700 | 304 |
| 1N4745A | 16 | 15.5 | 12.2 | 16 | 700 | 285 |
| 1N4746A | 18 | 14 | 13.7 | 20 | 750 | 250 |
| 1N4747A | 20 | 12.5 | 15.2 | 22 | 750 | 225 |
| 1N4748A | 22 | 11.5 | 16.7 | 23 | 750 | 205 |
| 1N4749A | 24 | 10.5 | 18.2 | 25 | 750 | 190 |
| 1N4750A | 27 | 9.5 | 20.6 | 35 | 750 | 170 |
| 1N4751A | 30 | 8.5 | 22.8 | 40 | 1000 | 150 |
| 1N4752A | 33 | 7.5 | 25.1 | 45 | 1000 | 135 |
| 1N4753A | 36 | 7 | 27.4 | 50 | 1000 | 125 |
| 1N4754A | 39 | 6.5 | 29.7 | 60 | 1000 | 115 |
| 1N4755A | 43 | 6 | 32.7 | 70 | 1500 | 110 |
| 1N4756A | 47 | 5.5 | 35.8 | 80 | 1500 | 95 |
| 1N4757A | 51 | 5 | 38.8 | 95 | 1500 | 90 |
| 1N4758A | 56 | 4.5 | 42.6 | 110 | 2000 | 80 |
| 1N4759A | 62 | 4 | 47.1 | 125 | 2000 | 70 |
| 1N4760A | 68 | 3.7 | 51.7 | 150 | 2000 | 65 |
| 1N4761A | 75 | 3.3 | 56 | 175 | 2000 | 60 |
| 1N4762A | 82 | 3 | 62.2 | 200 | 3000 | 55 |
| 1N4763A | 91 | 2.8 | 69.2 | 250 | 3000 | 50 |
| 1N4764A | 100 | 2.5 | 76 | 350 | 3000 | 45 |