| Part Numbers | Manufacturer Name | Datasheet | Voltage - Zener (Vz) | Tolerance | Power - Max | Impedance (Max) (Zzt) | Reverse Leakage Current@ Vr | Forward Voltage (Vf) (Max) @ If | Operating Temperature | Mounting Type | Package / Case |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 1N5257BTR | FAIRCHILD SEMICONDUCTOR CORP | 33V | ±5% | 500mW | 58 Ohm | 100nA @ 25V | 1.2V @ 200mA | -65°C ~ 200°C | Through Hole | DO-204AH, DO-35, Axial | |
| MMSZ5257B | FAIRCHILD SEMICONDUCTOR CORP | 33V | ±5% | 500mW | 58 Ohm | 100nA @ 25V | 900mV @ 10mA | -55°C ~ 150°C | Surface Mount | SOD-123 | |
| 1N5257B | FAIRCHILD SEMICONDUCTOR CORP | 33V | ±5% | 500mW | 58 Ohm | 100nA @ 25V | 1.2V @ 200mA | -65°C ~ 200°C | Through Hole | DO-204AH, DO-35, Axial | |
| 1N973B | FAIRCHILD SEMICONDUCTOR CORP | 33V | ±5% | 500mW | 58 Ohm | 5µA @ 25.1V | - | -65°C ~ 200°C | Through Hole | DO-204AH, DO-35, Axial | |
| 1N973BTR | FAIRCHILD SEMICONDUCTOR CORP | 33V | ±5% | 500mW | 58 Ohm | 5µA @ 25.1V | - | -65°C ~ 200°C | Through Hole | DO-204AH, DO-35, Axial | |
| 1N5257B_T50A | FAIRCHILD SEMICONDUCTOR CORP | 33V | ±5% | 500mW | 58 Ohm | 100nA @ 25V | 1.2V @ 200mA | -65°C ~ 200°C | Through Hole | DO-204AH, DO-35, Axial | |
| 1N5257B_T50R | FAIRCHILD SEMICONDUCTOR CORP | 33V | ±5% | 500mW | 58 Ohm | 100nA @ 25V | 1.2V @ 200mA | -65°C ~ 200°C | Through Hole | DO-204AH, DO-35, Axial | |
| 1N973B_T50A | FAIRCHILD SEMICONDUCTOR CORP | 33V | ±5% | 500mW | 58 Ohm | 5µA @ 25.1V | - | -65°C ~ 200°C | Through Hole | DO-204AH, DO-35, Axial | |
| 1N973B_T50R | FAIRCHILD SEMICONDUCTOR CORP | 33V | ±5% | 500mW | 58 Ohm | 5µA @ 25.1V | - | -65°C ~ 200°C | Through Hole | DO-204AH, DO-35, Axial |
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