Diodes Incorporated ZX5T951GTA

Overview

ZX5T951GTA from Diodes Incorporated is a 60V PNP medium-power low-saturation transistor in SOT223 package, rated for −5.5A continuous collector current, −15A peak pulse current, and V_CE(sat) < −70mV at −1A. It delivers high gain (h_FE ≥ 100 at −10A) and low on-resistance (R_SAT = 39mΩ), serving as a robust power switch in DC-DC converters and IGBT gate drivers.

For engineers reviewing the ZX5T951GTA datasheet, ZX5T951GTA pinout, ZX5T951GTA application, or ZX5T951GTA equivalent, key selection criteria include verified V_CEO = −60V, thermal resistance R_θJA = 42°C/W (on 52mm × 52mm 2oz Cu PCB), AEC-Q101 qualification, and complementary pairing with ZX5T851G for push-pull topologies.

Technical Context

This PNP bipolar junction transistor operates with reverse-biased collector-base junction (V_CBO = −100V) and emitter-base junction (V_EBO = −7V), supporting stable switching up to 120MHz f_T. Its low V_CE(sat) and high h_FE hold-up at −10A enable efficient conduction in high-current, low-voltage drop applications.

The device uses a thermally optimized SOT223 package with R_θJL = 10.48°C/W (junction-to-lead), enabling direct heat transfer to PCB copper. It meets AEC-Q101 stress testing for automotive-grade reliability and features halogen/antimony-free "Green" molding compound compliant with UL 94V-0.

Key Specifications

Pinout & Package

Package: SOT223 - Surface-mount plastic package with exposed collector tab for enhanced thermal dissipation; 0.112g weight; UL 94V-0 flammability rating; moisture sensitivity level 1.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ZX5T951GTC, the ZX5T951GTA offers identical performance in a smaller reel format ideal for prototyping and low-volume manufacturing; versus ZX5T851G, it serves opposite polarity roles and cannot substitute without topology redesign.

Availability

ZX5T951GTA is available at Aetrix Electronics and suitable for DC-DC converters, MOSFET/IGBT gate drivers, and motor control applications requiring stable component supply, AEC-Q101 reliability, and SOT223 thermal performance.

Supply support for ZX5T951GTA 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 components for automotive, industrial, and consumer markets.

The ZX5T951G belongs to Diodes' medium-power bipolar transistor product line, engineered for high-current switching with low saturation voltage and AEC-Q101 qualification for demanding power management roles.

FAQ

What is the maximum operating temperature for ZX5T951GTA?

The ZX5T951GTA is rated for junction temperature (T_J) from −55°C to +150°C and storage temperature (T_STG) over the same range. Its thermal resistance R_θJA = 42°C/W (on 52mm × 52mm 2oz Cu PCB) means it can sustain 3.0W dissipation at +25°C ambient, derating linearly above that point.

Is ZX5T951GTA pin-compatible with other SOT223 PNP transistors?

ZX5T951GTA follows standard SOT223 pinout (Emitter–Base–Collector–Collector Tab), matching industry conventions. However, electrical parameters-including V_CEO, h_FE, and V_CE(sat)-differ significantly across manufacturers; direct substitution requires validation of gain linearity and thermal behavior under target load conditions.

Does ZX5T951GTA support lead-free reflow soldering?

Yes. ZX5T951GTA features matte tin-plated leads qualified to MIL-STD-202, Method 208, and supports standard lead-free reflow profiles (peak ≤ 260°C). Its moisture sensitivity level is 1 per J-STD-020, eliminating bake requirements prior to assembly.

How does the R_SAT value relate to actual circuit performance?

R_SAT = 39mΩ is derived from V_CE(sat)/I_C at specified test conditions and reflects effective on-resistance in saturation. In practice, this value determines conduction loss (P = I_C² × R_SAT) and impacts thermal rise-e.g., −5A yields ~1W loss, requiring adequate copper area for heat spreading per the datasheet's 52mm × 52mm 2oz Cu reference layout.