| PartNumber | 1N957B | 1N957B-1e3 | 1N957A |
| 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 | Y | N |
| Mounting Style | Through Hole | Through Hole | Through Hole |
| Package / Case | DO-7 | DO-204AH-2 | DO-7 |
| Packaging | Bulk | Bulk | Foil Bag |
| Brand | Microchip / Microsemi | Microchip / Microsemi | Microchip / Microsemi |
| Product Type | Zener Diodes | Zener Diodes | Zener Diodes |
| Factory Pack Quantity | 1 | 1 | 1 |
| Subcategory | Diodes & Rectifiers | Diodes & Rectifiers | Diodes & Rectifiers |
| Vz Zener Voltage | - | 6.8 V | 6.8 V |
| Pd Power Dissipation | - | 0.5 W | 500 mW |
| Voltage Tolerance | - | 5 % | 10 % |
| Voltage Temperature Coefficient | - | 0.05 %/C | 0.05 %/C |
| Zener Current | - | 55 mA | 150 uA |
| Zz Zener Impedance | - | 4.5 Ohms | 4.5 Ohms |
| Minimum Operating Temperature | - | - 65 C | - 65 C |
| Maximum Operating Temperature | - | + 175 C | + 175 C |
| Configuration | - | Single | Single |
| Test Current | - | 18.5 mA | 18.5 mA |
| Diameter | - | 2.29 mm | - |
| Length | - | 5.08 mm | - |
| If Forward Current | - | 200 mA | - |
| Ir Reverse Current | - | 150 uA | - |
| Vf Forward Voltage | - | 1.1 V | 1.1 V |