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| Part Number: | 1N4957US | 
| Category: | Discrete Semiconductor Products | 
| Subcategory: | Diodes - Zener - Single | 
| Manufacturer: | Semtech Corporation | 
| Packaging: | Bulk | 
| Product Status: | Discontinued at Digi-Key | 
| Voltage - Zener (Nom) (Vz): | 9.1 V | 
| Tolerance: | ±4.95% | 
| Power - Max: | 5 W | 
| Impedance (Max) (Zzt): | 2 Ohms | 
| Current - Reverse Leakage @ Vr: | 25 µA @ 6.9 V | 
| Voltage - Forward (Vf) (Max) @ If: | - | 
| Operating Temperature: | -55°C ~ 175°C | 
| Mounting Type: | Surface Mount | 
| Package / Case: | SQ-MELF | 
| Supplier Device Package: | - |