Diodes Incorporated ZXTP2029FTA

Overview

ZXTP2029FTA from Diodes Incorporated (formerly Zetex Semiconductors) is a PNP medium-power bipolar junction transistor in SOT23 package, rated for V(BR)CEV ≤ −130 V, IC(cont) = −3 A, RCE(sat) = 45 mΩ typical, VCE(sat) < −80 mV at −1 A, and PD = 1.2 W. It serves as a high-voltage, high-current switch in DC-DC converter output stages and IGBT gate drive circuits.

For engineers reviewing the ZXTP2029FTA datasheet, ZXTP2029FTA pinout, ZXTP2029FTA application, or ZXTP2029FTA equivalent, key selection criteria include its −130 V collector-emitter blocking voltage, low −80 mV saturation voltage at −1 A, 150 MHz transition frequency, SOT23 thermal performance (RθJA = 104 °C/W on 30 mm × 30 mm PCB), and suitability for high-side switching in industrial power control.

Technical Context

This PNP BJT employs an advanced epitaxial process to achieve high breakdown voltage while maintaining low saturation resistance and fast switching (t(r) = 12 ns, t(f) = 35 ns). Its high HFE (100–300 across IC = −10 mA to −3 A) supports efficient base drive in discrete power stage designs.

The device is optimized for linear and saturated-mode operation in high-side configurations, with verified performance under pulsed conditions (300 µs pulse width, 2% duty cycle) and stable cutoff leakage (ICEV ≤ −20 nA at VCE = −100 V).

Key Specifications

Pinout & Package

Package: SOT23 - surface-mount, 3-lead plastic package with 1.2 mm height, 2.8–3.04 mm length, and 2.1–2.64 mm width; designed for high thermal dissipation on FR4 PCBs with 2 oz copper.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar PNP high-voltage switching applications.

Compared with ZXTN2020F and MMBT4403, ZXTP2029FTA uniquely combines −130 V blocking, −3 A current, and SOT23 thermal performance-making it the sole option among the three for high-side 100 V industrial switching without derating or parallel devices.

Availability

ZXTP2029FTA is available at Aetrix Electronics and suitable for MOSFET gate driving, high-side DC-DC conversion, and industrial motor control applications requiring stable component supply and long-term production continuity.

Supply support for ZXTP2029FTA includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Diodes Incorporated acquired Zetex Semiconductors in 2008 and maintains its legacy of high-performance discrete semiconductors for power management and signal conditioning.

This device belongs to Zetex's high-voltage PNP transistor product line, engineered specifically for space-constrained, high-efficiency power switching in industrial and automotive subsystems.

FAQ

What is the maximum safe operating voltage for ZXTP2029FTA in DC blocking applications?

The absolute maximum collector-emitter voltage is V(BR)CEO = −100 V under DC conditions, but V(BR)CEV = −130 V applies under pulsed conditions (IC = −1 μA, VBE biased between −0.3 V and +1 V). For reliable DC blocking, design to ≤ −90 V to maintain 10% margin against manufacturing variation and temperature drift.

Can ZXTP2029FTA be used in parallel for higher current handling?

No-this PNP BJT lacks inherent current-sharing characteristics due to negative temperature coefficient of VBE(sat). Parallel operation without individual emitter resistors causes thermal runaway. For >−3 A continuous, use a single higher-rated device such as the DXT13003K (SOT89, −5 A) instead.

What is the recommended PCB layout for optimal thermal performance?

Mount on a 30 mm × 30 mm × 1.6 mm FR4 board with ≥2 oz copper on both sides, connecting the emitter pad directly to a large internal ground/power plane. Use ≥4 thermal vias (0.3 mm diameter, 0.8 mm pitch) under the emitter pad to transfer heat to inner layers, achieving the rated RθJA = 104 °C/W.

Does ZXTP2029FTA require a Baker clamp for fast turn-off in switching applications?

Yes-its 410 ns storage time t(stg) can cause excessive switching loss in high-frequency operation. A Baker clamp (diode from base to collector) is recommended to prevent deep saturation and reduce t(stg) by limiting VBE(on) to ~−0.7 V, improving efficiency in >100 kHz converters.