The SMAJ4728A thru SMAJ4764A series features 1 Watt Zener Diodes with voltage ratings from 3.3 to 100 Volts. These diodes are designed for surface mount applications and offer low Zener impedance and low regulation factor. They are available in a DO-214AC (SMA) package and are RoHS compliant. Key features include a 5% tolerance on Zener voltage, epoxy meeting UL 94 V-0 flammability rating, and Moisture Sensitivity Level 1. Halogen-free options are available upon request.
| Part Number Series | Zener Voltage (VZ) (Volts) | Test Current (IZT) (mA) | Max. Dynamic Impedance (ZZT) @ IZT (Ohms) | Max. Reverse Current (IR) @ VR (A) | Knee Impedance (ZZK) (Ohms) | Knee Current (IZK) (mA) |
|---|---|---|---|---|---|---|
| SMAJ4728A | 3.3 | 76 | 10 | 100 @ 1V | 400 | 1 |
| SMAJ4729A | 3.6 | 69 | 10 | 100 @ 1V | 400 | 1 |
| SMAJ4730A | 3.9 | 64 | 9 | 50 @ 1V | 400 | 1 |
| SMAJ4731A | 4.3 | 58 | 9 | 10 @ 1V | 400 | 1 |
| SMAJ4732A | 4.7 | 53 | 8 | 10 @ 1V | 500 | 1 |
| SMAJ4733A | 5.1 | 49 | 7 | 10 @ 1V | 550 | 1 |
| SMAJ4734A | 5.6 | 45 | 5 | 10 @ 2V | 600 | 1 |
| SMAJ4735A | 6.2 | 41 | 2 | 10 @ 3V | 700 | 1 |
| SMAJ4736A | 6.8 | 37 | 3.5 | 10 @ 4V | 700 | 1 |
| SMAJ4737A | 7.5 | 34 | 4 | 10 @ 5V | 700 | 0.5 |
| SMAJ4738A | 8.2 | 31 | 4.5 | 10 @ 6V | 700 | 0.5 |
| SMAJ4739A | 9.1 | 28 | 5 | 10 @ 7V | 700 | 0.5 |
| SMAJ4740A | 10 | 25 | 7 | 10 @ 7.6V | 700 | 0.25 |
| SMAJ4741A | 11 | 23 | 8 | 5 @ 8.4V | 700 | 0.25 |
| SMAJ4742A | 12 | 21 | 9 | 5 @ 9.1V | 700 | 0.25 |
| SMAJ4743A | 13 | 19 | 10 | 5 @ 9.9V | 700 | 0.25 |
| SMAJ4744A | 15 | 17 | 14 | 5 @ 11.4V | 700 | 0.25 |
| SMAJ4745A | 16 | 15.5 | 16 | 5 @ 12.2V | 700 | 0.25 |
| SMAJ4746A | 18 | 14 | 20 | 5 @ 13.7V | 750 | 0.25 |
| SMAJ4747A | 20 | 12.5 | 22 | 5 @ 15.2V | 750 | 0.25 |
| SMAJ4748A | 22 | 11.5 | 23 | 5 @ 16.7V | 750 | 0.25 |
| SMAJ4749A | 24 | 10.5 | 25 | 5 @ 18.2V | 750 | 0.25 |
| SMAJ4750A | 27 | 9.5 | 35 | 5 @ 20.6V | 750 | 0.25 |
| SMAJ4751A | 30 | 8.5 | 40 | 5 @ 22.8V | 1000 | 0.25 |
| SMAJ4752A | 33 | 7.5 | 45 | 5 @ 25.1V | 1000 | 0.25 |
| SMAJ4753A | 36 | 7 | 50 | 5 @ 27.4V | 1000 | 0.25 |
| SMAJ4754A | 39 | 6.5 | 60 | 5 @ 29.7V | 1000 | 0.25 |
| SMAJ4755A | 43 | 6 | 70 | 5 @ 32.7V | 1500 | 0.25 |
| SMAJ4756A | 47 | 5.5 | 80 | 5 @ 35.8V | 1500 | 0.25 |
| SMAJ4757A | 51 | 5 | 95 | 5 @ 38.8V | 1500 | 0.25 |
| SMAJ4758A | 56 | 4.5 | 110 | 5 @ 42.6V | 2000 | 0.25 |
| SMAJ4759A | 62 | 4 | 125 | 5 @ 47.1V | 2000 | 0.25 |
| SMAJ4760A | 68 | 3.7 | 150 | 5 @ 51.7V | 2000 | 0.25 |
| SMAJ4761A | 75 | 3.3 | 175 | 5 @ 56V | 2000 | 0.25 |
| SMAJ4762A | 82 | 3 | 200 | 5 @ 62.2V | 3000 | 0.25 |
| SMAJ4763A | 91 | 2.8 | 250 | 5 @ 69.2V | 3000 | 0.25 |
| SMAJ4764A | 100 | 2.5 | 350 | 5 @ 76V | 3000 | 0.25 |
| Parameter | Test Conditions | Symbol | Value | Unit |
|---|---|---|---|---|
| Power Dissipation | Tamb≤50 | Pd | 1 | W |
| Operating Junction Temperature | Tj | -65~+150 | ||
| Storage Temperature | Tstg | -65~+150 | ||
| Max. Forward Voltage Drop | IF=100mA | Vf | 1.2 | V |
| Thermal Resistance (Junction to Ambient) | Note: 2 | RΘja | 100 | K/W |
| Thermal Resistance (Junction to Lead) | Note: 2 | RΘjL | 75 | K/W |
Dimensions (Inches/MM):
| Dimension | Min (In) | Max (In) | Min (MM) | Max (MM) | Note |
|---|---|---|---|---|---|
| A | .079 | .096 | 2.00 | 2.44 | |
| B | .050 | .064 | 1.27 | 1.63 | |
| C | .002 | .008 | .05 | .20 | |
| D | --- | .02 | --- | .51 | |
| E | .030 | .060 | .76 | 1.52 | |
| F | .065 | .091 | 1.65 | 2.32 | |
| G | .189 | .220 | 4.80 | 5.59 | |
| H | .157 | .181 | 4.00 | 4.60 | |
| J | .090 | .115 | 2.25 | 2.92 |
Ordering Information:
Device Packing: Part Number-TP Tape&Reel: 7.5Kpcs/Reel
Note: Adding "-HF" suffix for halogen free, e.g. Part Number-TP-HF