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| PartNumber | 1N5990B | 1N5990A | 1N5990B BK |
| Description | Zener Diodes Zener Diodes | Zener Diodes Zener Diodes | Zener Diodes 3.9Vz 90 Ohm 10 uA 1 Vr 128mA 500mW |
| Manufacturer | Microchip | Microchip | Central Semiconductor |
| Product Category | Zener Diodes | Zener Diodes | Zener Diodes |
| RoHS | N | N | Y |
| Vz Zener Voltage | 3.9 V | - | 3.9 V |
| Mounting Style | Axial | Through Hole | Through Hole |
| Package / Case | DO-35-2 | DO-35-2 | DO-35 |
| Pd Power Dissipation | 0.5 W | - | 500 mW |
| Voltage Tolerance | 5 % | - | 5 % |
| Voltage Temperature Coefficient | - 0.045 %/C | - | - |
| Zener Current | 128 mA | - | 10 uA |
| Zz Zener Impedance | 90 Ohms | - | 90 Ohms |
| Minimum Operating Temperature | - 65 C | - | - 65 C |
| Maximum Operating Temperature | + 175 C | - | + 200 C |
| Configuration | Single | - | Single |
| Test Current | 5 mA | - | 5 mA |
| Packaging | Foil Bag | Foil Bag | Bulk |
| Diameter | 1.7 mm | - | 2.29 mm |
| Length | 3.7 mm | - | 5.08 mm |
| Brand | Microchip / Microsemi | Microchip / Microsemi | Central Semiconductor |
| Ir Reverse Current | 10 uA | - | 10 uA |
| Product Type | Zener Diodes | Zener Diodes | Zener Diodes |
| Factory Pack Quantity | 1 | 1 | 2500 |
| Subcategory | Diodes & Rectifiers | Diodes & Rectifiers | Diodes & Rectifiers |
| Vf Forward Voltage | 1.1 V | - | 1.5 V |
| Unit Weight | 0.004833 oz | 0.004833 oz | - |
| Part # Aliases | - | - | 1N5990B BK PBFREE |