| PartNumber | 1N4478/TR | 1N4478 | 1N4478US |
| Description | Zener Diodes Zener Diodes | Zener Diodes Z MET 36V | Zener Diodes 36V ZENER 1.5W |
| Manufacturer | Microchip | Semtech | Semtech |
| Product Category | Zener Diodes | Zener Diodes | Zener Diodes |
| RoHS | N | N | - |
| Vz Zener Voltage | 36 V | 36 V | 36 V |
| Mounting Style | Through Hole | Through Hole | SMD/SMT |
| Package / Case | DO-41-2 | DO-41-2 | - |
| Pd Power Dissipation | 1.5 W | 1.5 W | - |
| Voltage Tolerance | 5 % | - | - |
| Zener Current | 40 mA | 50 nA | 40 mA |
| Zz Zener Impedance | 27 Ohms | 27 Ohms | 27 Ohms |
| Minimum Operating Temperature | - 65 C | - 55 C | - 55 C |
| Maximum Operating Temperature | + 175 C | + 175 C | + 175 C |
| Configuration | Single | Single | Single |
| Test Current | 7 mA | - | - |
| Packaging | Reel | - | Bulk |
| Diameter | 2.16 mm | 2.16 mm | - |
| Length | 4.06 mm | 4.06 mm | - |
| Brand | Microchip / Microsemi | Semtech | Semtech |
| If Forward Current | 200 mA | - | - |
| Ir Reverse Current | 0.05 uA | 50 nA | 2 uA |
| Product Type | Zener Diodes | Zener Diodes | Zener Diodes |
| Factory Pack Quantity | 100 | 1 | 1 |
| Subcategory | Diodes & Rectifiers | Diodes & Rectifiers | Diodes & Rectifiers |
| Vf Forward Voltage | 1 V | - | - |
| Voltage Temperature Coefficient | - | 0.093 %/C | 0.093 %/C |
| Series | - | 1N447 | 1N447 |
| Voltage Regulation Accuracy | - | 1.7 V | 1.7 V |