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FZT600TA

DIOFZT600TA

Diodes Incorporated
Bipolar (BJT) Transistor NPN - Darlington 140 V 2 A 250MHz 2 W Surface Mount SOT-223-3
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Overview

The FZT600TA is a high-gain NPN Darlington transistor in a SOT-223 package designed for medium power switching and amplification. It features a high collector-emitter breakdown voltage of 140V and can handle continuous collector currents up to 2A.

Why Choose This Part

The FZT600TA offers an exceptionally high current gain of over 10,000 at 500mA, reducing the drive requirements for control circuitry. Its SOT-223 package provides a 2W power dissipation rating, making it more thermally capable than standard SOT-23 alternatives while maintaining a small footprint.

Applications

Solenoid and Relay Driving
The high current gain (hFE > 10,000) allows low-power logic signals to drive inductive loads directly.
Stepper Motor Control
Used in H-bridge or unipolar configurations for driving motor phases with minimal base current requirements.
Lamp and LED Driving
Switching high-voltage or high-current lighting arrays from microcontroller GPIO pins.
Linear Regulator Series Pass Element
Acts as the power pass component in discrete linear power supply designs needing high current gain.

Key Specifications

Power - Max 2 W
Mounting Type Surface Mount
Package / Case TO-261-4, TO-261AA
Transistor Type NPN - Darlington
Operating Temperature -55degC ~ 150degC (TJ)
Frequency - Transition 250MHz
Supplier Device Package SOT-223-3
Vce Saturation (Max) @ Ib, Ic 1.2V @ 10mA, 1A
Current - Collector (Ic) (Max) 2 A
Current - Collector Cutoff (Max) 10uA
DC Current Gain (hFE) (Min) @ Ic, Vce 2000 @ 500mA, 10V
Voltage - Collector Emitter Breakdown (Max) 140 V

Getting Started

Ensure adequate copper area on the PCB collector pad to manage heat dissipation at the 2W limit. When driving inductive loads, always include a freewheeling diode across the load to protect the transistor from voltage spikes during turn-off.