FZT705TA – ZETEX

Overview

The ZETEX FZT705TA is a high-gain PNP Darlington transistor designed for demanding switching and amplification tasks. Its exceptional DC current gain (hFE) of up to 3000 at 2A, coupled with a robust 120V VCEO rating, makes it ideal for driving moderate loads. A critical design consideration when utilizing such high-gain devices is managing leakage currents and ensuring adequate base drive to prevent saturation issues, particularly in high-temperature environments where thermal runaway can become a concern. This component, manufactured by Diodes Incorporated, offers a compelling balance of performance and thermal management capabilities for its class.

Key Features

• Collector-Emitter Voltage (VCEO): 120 V
• Maximum Continuous Collector Current (IC): 2 A
• DC Current Gain (hFE): 3000 (min) at 2 A
• Power Dissipation (Pd): 2 W
• Operating Temperature Range: -55 °C to +150 °C
• Package: SOT-223 (SMD/SMT), 6.7 mm x 3.7 mm x 1.65 mm

Applications

The component is engineered for deployment in systems requiring high reliability and performance under specific operating conditions. It provides functional stability across the stated design envelope.

• High-current switching in power supply regulation circuits
• Driving inductive loads such as relays and solenoids
• Low-frequency audio amplification stages
• Battery-powered device power management and load switching