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| PartNumber | BD437G | BD437 | BD437. |
| Description | Bipolar Transistors - BJT 4A 45V 36W NPN | Bipolar Transistors - BJT NPN Medium Power | NPN/4A/45V TO-126 |
| Manufacturer | ON Semiconductor | STMicroelectronics | - |
| Product Category | Bipolar Transistors - BJT | Bipolar Transistors - BJT | - |
| RoHS | Y | Y | - |
| Mounting Style | Through Hole | SMD/SMT | - |
| Package / Case | TO-225-3 | SOT-32-3 | - |
| Transistor Polarity | NPN | NPN | - |
| Configuration | Single | Single | - |
| Collector Emitter Voltage VCEO Max | 45 V | 45 V | - |
| Collector Base Voltage VCBO | 45 V | 45 V | - |
| Emitter Base Voltage VEBO | 5 V | 5 V | - |
| Collector Emitter Saturation Voltage | 0.8 V | 0.2 V | - |
| Maximum DC Collector Current | 4 A | 4 A | - |
| Gain Bandwidth Product fT | 3 MHz | 3 MHz | - |
| Minimum Operating Temperature | - 55 C | - 65 C | - |
| Maximum Operating Temperature | + 150 C | + 150 C | - |
| Series | BD437 | BD437 | - |
| Height | 11.04 mm | 10.8 mm | - |
| Length | 7.74 mm | 7.8 mm | - |
| Packaging | Bulk | Tube | - |
| Width | 2.66 mm | 2.7 mm | - |
| Brand | ON Semiconductor | STMicroelectronics | - |
| Continuous Collector Current | 4 A | 4 A | - |
| DC Collector/Base Gain hfe Min | 30 | 30 | - |
| Pd Power Dissipation | 36 W | 36 W | - |
| Product Type | BJTs - Bipolar Transistors | BJTs - Bipolar Transistors | - |
| Factory Pack Quantity | 500 | 2000 | - |
| Subcategory | Transistors | Transistors | - |
| Unit Weight | 0.022575 oz | 0.002116 oz | - |
| DC Current Gain hFE Max | - | 130 | - |