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| PartNumber | 1N991BUR-1 | 1N991B | 1N991A |
| 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 | 180 V | - | - |
| Mounting Style | Axial | - | - |
| Package / Case | DO-35-2 | - | - |
| Pd Power Dissipation | 500 mW | - | - |
| Voltage Tolerance | 5 % | - | - |
| Voltage Temperature Coefficient | 0.11 %/C | - | - |
| Zener Current | 2 mA | - | - |
| Zz Zener Impedance | 2200 Ohms | - | - |
| Minimum Operating Temperature | - 65 C | - | - |
| Maximum Operating Temperature | + 175 C | - | - |
| Configuration | Single | - | - |
| Test Current | 0.68 mA | - | - |
| Packaging | Foil Bag | Foil Bag | Foil Bag |
| Diameter | 2.29 mm | - | - |
| Length | 5.08 mm | - | - |
| Brand | Microchip / Microsemi | Microchip / Microsemi | Microchip / Microsemi |
| Ir Reverse Current | 0.5 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 | 1.3 V | - | - |
