| PartNumber | 1N3997 | 1N3997RA | 1N3997A |
| Description | Zener Diodes Zener Diodes | Zener Diodes Zener Diodes | Zener Diodes Zener Diodes |
| Manufacturer | Microchip | Microchip | Microchip |
| Product Category | Zener Diodes | Zener Diodes | Zener Diodes |
| RoHS | N | N | N |
| Packaging | Tray | Tray | Tray |
| Brand | Microchip / Microsemi | Microchip / Microsemi | Microchip / Microsemi |
| Product Type | Zener Diodes | Zener Diodes | Zener Diodes |
| Factory Pack Quantity | 1 | 1 | 1 |
| Subcategory | Diodes & Rectifiers | Diodes & Rectifiers | Diodes & Rectifiers |
| Vz Zener Voltage | - | 5.6 V | - |
| Mounting Style | - | Stud Mount | - |
| Package / Case | - | DO-203AA-2 | - |
| Pd Power Dissipation | - | 10 W | - |
| Voltage Tolerance | - | 5 % | - |
| Voltage Temperature Coefficient | - | 0.04 %/C | - |
| Zener Current | - | 1680 mA | - |
| Zz Zener Impedance | - | 1 Ohms | - |
| Minimum Operating Temperature | - | - 65 C | - |
| Maximum Operating Temperature | - | + 175 C | - |
| Configuration | - | Single | - |
| Test Current | - | 445 mA | - |
| Diameter | - | 11.1 mm | - |
| Length | - | 20.32 mm | - |
| Ir Reverse Current | - | 10 uA | - |
| Vf Forward Voltage | - | 1.5 V | - |