| PartNumber | 2N3421 | 2N3420 | 2N3420S |
| Description | Bipolar Transistors - BJT NPN Power SW | Bipolar Transistors - BJT NPN Power SW | Bipolar Transistors - BJT Power BJT |
| Manufacturer | Central Semiconductor | Central Semiconductor | Microchip |
| Product Category | Bipolar Transistors - BJT | Bipolar Transistors - BJT | Bipolar Transistors - BJT |
| RoHS | Y | Y | N |
| Mounting Style | Through Hole | Through Hole | Through Hole |
| Package / Case | TO-39-3 | TO-39-3 | TO-5-3 |
| Transistor Polarity | NPN | NPN | - |
| Configuration | Single | Single | - |
| Collector Emitter Voltage VCEO Max | 80 V | 60 V | - |
| Collector Base Voltage VCBO | 125 V | 85 V | - |
| Emitter Base Voltage VEBO | 8 V | 6 V | - |
| Collector Emitter Saturation Voltage | 500 mV | 0.5 V | - |
| Maximum DC Collector Current | 2 A | - | - |
| Gain Bandwidth Product fT | 40 MHz | 40 MHz | - |
| Series | 2N3421 | 2N3420 | - |
| DC Current Gain hFE Max | 120 | 120 | - |
| Height | 6.6 mm | 6.6 mm | - |
| Length | 9.4 mm | 9.4 mm | - |
| Packaging | Bulk | Bulk | Foil Bag |
| Width | 9.4 mm | 9.4 mm | - |
| Brand | Central Semiconductor | Central Semiconductor | Microchip / Microsemi |
| DC Collector/Base Gain hfe Min | 40 | 40 | - |
| Product Type | BJTs - Bipolar Transistors | BJTs - Bipolar Transistors | BJTs - Bipolar Transistors |
| Factory Pack Quantity | 500 | 500 | 1 |
| Subcategory | Transistors | Transistors | Transistors |
| Part # Aliases | 2N3421 PBFREE | 2N3420 PBFREE | - |
| Unit Weight | 0.035486 oz | - | - |