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| Part Number: | 1N4557B |
| Category: | Discrete Semiconductor Products |
| Subcategory: | Diodes - Zener - Single |
| Manufacturer: | Microchip Technology |
| Packaging: | Bulk |
| Product Status: | Active |
| Voltage - Zener (Nom) (Vz): | 3.9 V |
| Tolerance: | ±5% |
| Power - Max: | 50 W |
| Impedance (Max) (Zzt): | 0.16 Ohms |
| Current - Reverse Leakage @ Vr: | 150 µA @ 500 mV |
| Voltage - Forward (Vf) (Max) @ If: | 1.5 V @ 10 A |
| Operating Temperature: | -65°C ~ 175°C |
| Mounting Type: | Through Hole |
| Package / Case: | TO-204AD |
| Supplier Device Package: | TO-204AD (TO-3) |
