| PartNumber | BD677A | BD677AG | BD677AS |
| Description | Darlington Transistors NPN Power Darlington | Darlington Transistors 4A 60V 40W NPN | Darlington Transistors NPN Epitaxial Sil |
| Manufacturer | STMicroelectronics | ON Semiconductor | FAI |
| Product Category | Darlington Transistors | Darlington Transistors | Transistors (BJT) - Single |
| RoHS | Y | Y | - |
| Configuration | Single | Single | Single |
| Transistor Polarity | NPN | NPN | NPN |
| Collector Emitter Voltage VCEO Max | 60 V | 60 V | - |
| Emitter Base Voltage VEBO | 5 V | 5 V | - |
| Collector Base Voltage VCBO | 60 V | 60 V | - |
| Maximum DC Collector Current | 4 A | 4 A | 4 A |
| Maximum Collector Cut off Current | 200 uA | 200 uA | 200 uA |
| Pd Power Dissipation | 40 W | - | - |
| Mounting Style | Through Hole | Through Hole | Through Hole |
| Package / Case | SOT-32-3 | TO-225AA-3 | - |
| Maximum Operating Temperature | + 150 C | + 150 C | + 150 C |
| Series | BD677A | BD677A | - |
| Height | 10.8 mm | 11.04 mm | - |
| Length | 7.8 mm | 7.74 mm | - |
| Width | 2.7 mm | 2.66 mm | - |
| Brand | STMicroelectronics | ON Semiconductor | - |
| Continuous Collector Current | 4 A | - | 4 A |
| DC Collector/Base Gain hfe Min | 750 | 750 | - |
| Product Type | Darlington Transistors | Darlington Transistors | - |
| Factory Pack Quantity | 2000 | 500 | - |
| Subcategory | Transistors | Transistors | - |
| Unit Weight | 0.002116 oz | 0.068784 oz | 0.026843 oz |
| Minimum Operating Temperature | - | - 55 C | - |
| Packaging | - | Bulk | Bulk |
| Part Aliases | - | - | BD677AS_NL |
| Package Case | - | - | TO-126 |
| Pd Power Dissipation | - | - | 40 W |
| Collector Emitter Voltage VCEO Max | - | - | 60 V |
| Collector Base Voltage VCBO | - | - | 60 V |
| Emitter Base Voltage VEBO | - | - | 5 V |
| DC Collector Base Gain hfe Min | - | - | 750 |