ZTX454 Bipolar Transistor

• Type: NPN
• Collector-Emitter Voltage, max: 120 V
• Collector-Base Voltage, max: 140 V
• Emitter-Base Voltage, max: 5 V
• Collector Current − Continuous, max: 1 A
• Collector Dissipation: 1 W
• DC Current Gain (h_fe): 100 to 300
• Transition Frequency, min: 100 MHz
• Operating and Storage Junction Temperature Range: -55 to +200 °C
• Package: TO-92

The ZTX454 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 emitter, base, and collector leads.
Here is an image showing the pin diagram of this transistor.The complementary PNP transistor to the ZTX454 is the ZTX554.The FMMT455 (SOT-23) and FMMT625 (SOT-23) is the SMD version of the ZTX454 transistor. These transistors are of the same type, have similar parameters and are designed for surface mounting.You can replace the ZTX454 with the ZTX455.