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| PartNumber | 1N5991/TR | 1N5991A | 1N5991 |
| 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 |
| Vz Zener Voltage | 4.3 V | 4.3 V | - |
| Mounting Style | Through Hole | Axial | - |
| Package / Case | DO-35-2 | DO-35-2 | - |
| Pd Power Dissipation | 500 mW | 0.5 W | - |
| Voltage Tolerance | 20 % | 10 % | - |
| Voltage Temperature Coefficient | - 0.01 %/C | - 0.01 %/C | - |
| Zener Current | 116 mA | 116 mA | - |
| Zz Zener Impedance | 90 Ohms | 90 Ohms | - |
| Minimum Operating Temperature | - 65 C | - 65 C | - |
| Maximum Operating Temperature | + 175 C | + 175 C | - |
| Configuration | Single | Single | - |
| Test Current | 5 mA | 5 mA | - |
| Packaging | Reel | Foil Bag | Bulk |
| Diameter | 2.03 mm | 1.7 mm | - |
| Length | 4.44 mm | 3.7 mm | - |
| Brand | Microchip / Microsemi | Microchip / Microsemi | Microchip / Microsemi |
| If Forward Current | 200 mA | - | - |
| Ir Reverse Current | 15 uA | 15 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 | 1.1 V | 1.1 V | - |
| Unit Weight | - | 0.004833 oz | - |