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| Part Number | UM9401SM | UM9401 | UM9401B | UM9401F |
| Manufacturer | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Series | - | - | - | - |
| Package/Case | SQ-MELF | Axial | Axial | 2-SMD |
| Packaging | Tape & Reel (TR) | Tape & Reel (TR) | Tape & Reel (TR) | Bag |
| Product Status | Active | Active | Active | Active |
| Diode Type | PIN - Single | PIN - Single | PIN - Single | PIN - Single |
| Voltage - Peak Reverse (Max) | 50V | 50V | 50V | 50V |
| Current - Max | - | - | - | - |
| Capacitance @ Vr, F | 1.5pF @ 0V, 100MHz | 1.5pF @ 0V, 100MHz | 1.5pF @ 0V, 100MHz | 0.9pF @ 50V, 1MHz |
| Resistance @ If, F | 1Ohm @ 50mA, 100MHz | 1Ohm @ 50mA, 100MHz | 1Ohm @ 50mA, 100MHz | 750mOhm @ 50mA, 100MHz |
| Power Dissipation (Max) | 5.5 W | 5.5 W | 5.5 W | 4 W |
| Operating Temperature | -65°C ~ 175°C | -65°C ~ 175°C | -65°C ~ 175°C | -65°C ~ 175°C |
| Grade | - | - | - | - |
| Qualification | - | - | - | - |
| Supplier Device Package | - | Axial | Axial | - |
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