Diodes Incorporated ZXT951KTC

Overview

ZXT951KTC from Diodes Incorporated is a 60V PNP medium-power bipolar transistor optimized for high-current switching in automotive and industrial power conversion. It delivers -6A continuous collector current, -60V V_CEO, 53 mΩ typical equivalent on-resistance, and maintains h_FE ≥100 at -2A - enabling robust DC-DC converter and motor control stage operation.

For engineers reviewing the ZXT951KTC datasheet, ZXT951KTC pinout, ZXT951KTC application, or ZXT951KTC equivalent, key selection criteria include its AEC-Q101 qualification, low V_CE(sat) down to -13 mV at -0.1A/-10mA drive, thermal resistance of 1.77°C/W (junction-to-leads), and TO252 package suitability for high-power PCB layouts with 2oz copper.

Technical Context

This PNP transistor operates in linear and saturated switching modes, with guaranteed BV_CEO = -60V and BVCBO = -100V for reliable blocking in inductive load circuits. Its f_T = 120 MHz supports fast turn-on/turn-off transitions, while t_ON/t_OFF = 82/350 ns ensures precise timing control in PWM-driven power stages.

The device uses a planar epitaxial structure with optimized base doping and emitter geometry to sustain high gain (h_FE = 100–300) across -10mA to -10A collector currents. Thermal design leverages low R_θJL = 1.77°C/W and compatibility with 25mm × 25mm FR4 PCBs using 1oz or 2oz copper for scalable power dissipation up to 4.2 W.

Key Specifications

Pinout & Package

Package: TO252 (DPAK), surface-mount, 3-terminal plastic case with exposed collector tab for thermal and electrical connection.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar PNP medium-power switching applications.

Compared with ZXT951MTC and MJD127G, the ZXT951KTC uniquely combines AEC-Q101 compliance, -60V rating, and sub-100 mV V_CE(sat) at 2A - making it the only option qualified for automotive body electronics requiring both transient robustness and efficiency-critical conduction loss reduction.

Availability

ZXT951KTC is available at Aetrix Electronics and suitable for automotive body control modules, industrial DC-DC converters, and brushed DC motor drivers requiring stable component supply and long-term lifecycle support.

Supply support for ZXT951KTC 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 is a global manufacturer of discrete semiconductors and analog ICs, specializing in high-reliability power management, signal integrity, and protection solutions.

The ZXT951KTC belongs to Diodes' ZXT series of medium-power bipolar transistors engineered for automotive-grade switching in harsh-environment power conversion and motor control applications.

FAQ

What is the maximum allowable junction temperature for continuous operation?

The ZXT951KTC has an operating junction temperature range of -55°C to +150°C. For continuous operation, the absolute maximum is +150°C, but sustained operation above +125°C requires derating based on PCB copper coverage and ambient airflow. The device's R_θJL = 1.77°C/W enables reliable thermal management even at full -6A current on 2oz copper layouts.

Can ZXT951KTC be used in parallel configurations for higher current handling?

Yes - the ZXT951KTC exhibits positive temperature coefficient for V_CE(sat), promoting current sharing when paralleled. However, individual base resistors must be used to ensure balanced drive, and layout symmetry (matched trace lengths, thermal coupling) is critical. Derating to ≤80% of total combined current is recommended for reliability.

Does the TO252 package require special soldering profile considerations?

Yes - the large exposed collector tab acts as a thermal mass. Reflow profiles must provide sufficient time above liquidus (≥60 seconds at >217°C) to ensure complete wetting of the tab to the PCB copper pour. Diodes' AP02001 recommends a minimum 10 mm² thermal pad with 4–6 thermal vias (0.3 mm diameter) to inner ground layers for optimal performance.

Is there a recommended gate/base driver IC compatible with ZXT951KTC?

No gate driver is needed since ZXT951KTC is a bipolar transistor, not a MOSFET. For base drive, Diodes' AP2204K (±200 mA dual-output LDO) or Texas Instruments' UCC27531 (4-A peak, single-channel driver) are suitable for fast-switching applications. Base current must be sized per h_FE curve - e.g., -600 mA for -6A I_C at h_FE = 10.