BC338-40 Bipolar Transistor

• Type: NPN
• Collector-Emitter Voltage, max: 25 V
• Collector-Base Voltage, max: 30 V
• Emitter-Base Voltage, max: 5 V
• Collector Current − Continuous, max: 0.8 A
• Collector Dissipation: 0.625 W
• DC Current Gain (h_fe): 250 to 630
• Transition Frequency, min: 100 MHz
• Operating and Storage Junction Temperature Range: -55 to +150 °C
• Package: TO-92

The BC338-40 is manufactured in a plastic TO-92 case. When looking at the flat side with the leads pointed downward, the three leads emerging from the transistor are, from left to right, the collector, base, and emitter leads.
Here is an image showing the pin diagram of this transistor.The BC338-40 transistor can have a current gain of 250 to 630. The gain of the BC338 will be in the range from 100 to 630, for the BC338-16 it will be in the range from 100 to 250, for the BC338-25 it will be in the range from 160 to 400.The complementary PNP transistor to the BC338-40 is the BC328-40.The BC818 (SOT-23), BC818-40 (SOT-23), BC818-40W (SOT-323), BC818W (SOT-323) and BCX20 (SOT-23) is the SMD version of the BC338-40 transistor. These transistors are of the same type, have similar parameters and are designed for surface mounting.You can replace the BC338-40 with the BC337 or BC337-40.