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| PartNumber | 1N4557B | 1N4557BJAN | 1N4557B MSC |
| Description | Zener Diodes Zener Diodes | Diode Zener Single 3.9V 5% 50W 2-Pin TO-3 Tray - Trays (Alt: JAN1N4557B) | |
| Manufacturer | Microchip | - | - |
| Product Category | Zener Diodes | - | - |
| RoHS | N | - | - |
| Packaging | Tray | - | - |
| Brand | Microchip / Microsemi | - | - |
| Product Type | Zener Diodes | - | - |
| Factory Pack Quantity | 1 | - | - |
| Subcategory | Diodes & Rectifiers | - | - |