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| PartNumber | JAN1N4978C | JAN1N4978CUS | JAN1N4978 |
| Description | Zener Diodes Zener Diodes | Zener Diodes Zener Diodes | TVS Diodes / ESD Suppressors 68V ZENER 500W |
| Manufacturer | Microchip | Microchip | Microchip |
| Product Category | Zener Diodes | Zener Diodes | Zener Diodes |
| RoHS | N | N | N |
| Vz Zener Voltage | 68 V | 68 V | - |
| Mounting Style | Axial | SMD/SMT | Through Hole |
| Package / Case | E-Package-2 | D-5B-2 | E-Package-2 |
| Pd Power Dissipation | 5 W | 5 W | - |
| Voltage Tolerance | 2 % | 2 % | - |
| Voltage Temperature Coefficient | 0.1 %/C | 0.1 %/C | - |
| Zener Current | 70 mA | 70 mA | - |
| Zz Zener Impedance | 50 Ohms | 50 Ohms | - |
| Minimum Operating Temperature | - 65 C | - 65 C | - |
| Maximum Operating Temperature | + 175 C | + 175 C | - |
| Configuration | Single | Single | - |
| Test Current | 20 mA | 20 mA | - |
| Packaging | Foil Bag | Foil Bag | Bulk |
| Diameter | 3.42 mm | - | 3.42 mm |
| Length | 4.5 mm | 5.72 mm | 6.1 mm |
| Brand | Microchip / Microsemi | Microchip / Microsemi | Microchip / Microsemi |
| Voltage Regulation Accuracy | 5.5 V | 5.5 V | - |
| Ir Reverse Current | 2 uA | 2 uA | - |
| Product Type | Zener Diodes | Zener Diodes | Zener Diodes |
| Factory Pack Quantity | 1 | 1 | 1 |
| Subcategory | Diodes & Rectifiers | Diodes & Rectifiers | Diodes & Rectifiers |
| Vf Forward Voltage | 1.5 V | 1.5 V | - |
| Height | - | 3.76 mm | - |
| Width | - | 3.76 mm | - |
| Termination Style | - | - | Axial |