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Home > Products > Discrete Semiconductor Products > Transistors > Bipolar (BJT) > Single Bipolar Transistors

Diodes Incorporated ZX5T1951GQTA

Name: ZX5T1951GQTA
Brand: Diodes Incorporated
SKU: ZX5T1951GQTA
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: ZX5T1951GQTA

Manufacturer:: Diodes Incorporated

Category:: Single Bipolar Transistors

Package:: TO-261-4, TO-261AA

Datasheet:: ZX5T1951GQTA.pdf

Description:: TRANS PNP 60V 6A SOT-223-3

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Product details

Overview

ZX5T1951GQTA from Diodes Incorporated is a PNP bipolar junction transistor (BJT) in SOT223 package, rated for -60V V_CEO, -6A continuous collector current, and featuring V_CE(sat) < -95mV at -1A. It delivers R_CE(sat) = 40mΩ and h_FE ≥ 100 up to -10A, and is AEC-Q101 qualified for automotive motor driving and solenoid control.

For engineers reviewing the ZX5T1951GQTA datasheet, ZX5T1951GQTA pinout, ZX5T1951GQTA application, or ZX5T1951GQTA equivalent, key selection criteria include its low saturation voltage under high-current switching, thermal performance on 52mm × 52mm 2oz copper PCBs, and IATF16949-certified manufacturing traceability for automotive-grade reliability.

Technical Context

This PNP BJT operates as a medium-power switch with robust avalanche-rated breakdown (V_CBO = -90V, V_CES = -90V) and specified h_FE across wide current range (-10mA to -10A). Its safe operating area (SOA) supports pulsed loads up to -15A with defined transient thermal impedance curves.

Designed for DC-DC modules and backlight inverters, it uses a planar epitaxial structure with green molding compound (UL 94V-0), matte tin-plated leads, and J-STD-020 Level 1 moisture sensitivity - enabling reflow compatibility without bake requirements.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	-60V - Maximum allowable collector-emitter voltage before breakdown in common-emitter configuration.
I_C (cont)	-6A - Continuous collector current rating at T_A = +25°C with 52mm × 52mm 2oz copper PCB.
V_CE(sat)	< -95mV @ -1A/ -100mA base drive - Enables low conduction loss in high-side switching applications.
R_CE(sat)	40mΩ - Equivalent on-resistance derived from V_CE(sat)/I_C, critical for thermal design in motor drivers.
h_FE	100–240 @ -10mA to -2A - High, stable current gain supports reliable base drive sizing across load conditions.
T_J Range	-55°C to +150°C - Extended junction temperature range enables operation in under-hood automotive environments.
ESD HBM	4000V - Robust electrostatic discharge immunity per JEDEC JESD22-A114, reducing handling sensitivity.

Pinout & Package

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

Pin/Terminal	Circuit Role	Design Meaning
Pin 1 (Emitter)	E	Current sink terminal; connected to system ground or low-side return path in high-side switch configurations.
Pin 2 (Base)	B	Control input; requires -100mA base current to saturate at -1A collector load per datasheet test condition.
Pin 3 (Collector)	C	Main power output terminal; electrically tied to exposed metal tab for direct PCB thermal coupling.
Pin 4 (Collector Tab)	C (thermal)	Exposed metal pad - must be soldered to ≥52mm² 2oz copper pour for rated 3.0W power dissipation.

Key Features

Feature	Design Value
AEC-Q101 qualification	Validated for automotive use with PPAP capability and IATF16949 manufacturing - eliminates qualification overhead for Tier 1 suppliers.
Low V_CE(sat) at high current	< -200mV @ -5A ensures ≤1W conduction loss, reducing heatsink requirements in 12V actuator drivers.
High h_FE up to -10A	Minimum h_FE = 5 at -10A enables simplified base drive circuitry without Darlington staging.
Green, RoHS-compliant construction	Halogen- and antimony-free (<900ppm Br/Cl, <1000ppm Sb) - meets EU Directive 2015/863/EU and OEM environmental mandates.

Applications

Motor Driving

DC-DC Modules

Use Scenario: Driving brushed DC motors in automotive HVAC blower systems with PWM-controlled speed regulation.

IC Role / Device Role / Timing Role: High-side PNP switch controlling motor supply rail; handles peak currents up to -6A during stall conditions.

Use Value: Low R_CE(sat) minimizes I²R heating during continuous 12V operation, extending motor driver board lifetime.

Use Scenario: Regulating output voltage in non-isolated buck converters for infotainment power rails.

IC Role / Device Role / Timing Role: Synchronous rectifier replacement in low-voltage, high-current secondary-side switching.

Use Value: Fast switching (t_on = 33ns, t_off = 215ns) reduces dead-time losses and improves efficiency above 92% at 5A load.

Backlight Inverters

Actuator, Relay and Solenoid Drivers

Use Scenario: Driving cold-cathode fluorescent lamp (CCFL) transformers in instrument cluster backlighting.

IC Role / Device Role / Timing Role: High-voltage PNP switch toggling transformer primary at 50–100kHz with fast turn-off to limit voltage spikes.

Use Value: -90V V_CBO withstands flyback transients >70V, eliminating need for external snubbers in compact layouts.

Use Scenario: Energizing 12V fuel injector solenoids and ABS hydraulic valves in engine control units.

IC Role / Device Role / Timing Role: Current-sinking switch interfacing microcontroller GPIO via base resistor network.

Use Value: Guaranteed h_FE ≥ 40 at -5A allows precise current control within ±5% tolerance across -40°C to +125°C ambient.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
ZX5T1952GQTA	Same SOT223 package, but NPN polarity; V_CEO = +60V, I_C = +6A, V_CE(sat) < +95mV @ +1A.	Requires inverted logic and low-side placement; unsuitable for high-side 12V rail switching where ground-referenced control is unavailable.	Select only when circuit topology permits NPN-based high-current sinking and PCB layout accommodates reversed current flow direction.
MJD44H11T4G	TO-252 package; V_CEO = -80V, I_C = -8A, V_CE(sat) = -1.5V @ -4A - significantly higher saturation voltage.	Larger footprint and lower power density; thermal resistance R_θJA = 60°C/W vs. 42°C/W - requires larger copper area for same power handling.	Choose only if higher voltage margin (>60V) is mandatory and board space allows TO-252 mounting; not drop-in compatible.

Compared with ZX5T1951GQTA, ZX5T1952GQTA offers complementary NPN functionality but demands redesign of gate drive and layout, while MJD44H11T4G trades higher voltage rating for poorer thermal efficiency and larger footprint - making ZX5T1951GQTA optimal for space-constrained, thermally demanding automotive high-side switches.

Availability

ZX5T1951GQTA is available at Aetrix Electronics and suitable for motor driving, DC-DC modules, and actuator/solenoid control requiring stable component supply in automotive production programs.

Supply support for ZX5T1951GQTA 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, headquartered in Plano, Texas, with design, manufacturing, and sales operations across Asia, Europe, and the Americas.

ZX5T1951GQTA belongs to Diodes' automotive-qualified bipolar transistor product line, engineered specifically for high-reliability, high-current switching in engine control, body electronics, and ADAS subsystems.

FAQ

What is the maximum allowable PCB copper area required to achieve the full 3.0W power dissipation rating?

The 3.0W rating assumes mounting on a 52mm × 52mm (2704 mm²) area of 2oz copper on a single-sided 1.6mm FR4 PCB under still-air conditions. Reducing copper area to 25mm × 25mm lowers PD to 1.6W due to increased R_θJA (78°C/W vs. 42°C/W). Thermal simulation using the provided transient impedance curves is recommended for non-standard layouts.

Is ZX5T1951GQTA suitable for linear regulator applications?

No - this device is optimized for switching operation, not linear regulation. Its SOA curve shows limited safe operating area in the linear region, and V_CE(sat) is specified only under saturated switching conditions. For linear applications, Diodes' ZXT13P series PNP transistors offer extended SOA and guaranteed Safe Operating Area in the active region.

Does the "GQ" suffix indicate lead-free and halogen-free compliance?

Yes - the "GQ" suffix denotes Diodes Incorporated's Green Qualification: RoHS 3 compliant (2015/863/EU), lead-free, and halogen- and antimony-free (<900ppm Br/Cl, <1000ppm Sb), verified per internal material testing and certified to IATF16949 manufacturing standards.

Can ZX5T1951GQTA replace older PN2907 or MPSA92 transistors in legacy designs?

Only with validation - while ZX5T1951GQTA exceeds PN2907 (I_C = -600mA) and MPSA92 (I_C = -500mA) in current rating, its higher gain and lower V_CE(sat) may alter base drive timing and transient response. Layout changes are required due to SOT223 vs. TO-92/TO-92-3 footprints, and thermal interface must be redesigned to leverage the exposed collector tab.

ZX5T1951GQTA Specifications

Product attributes: Attribute value

Manufacturer:: Diodes Incorporated

Series:: -

Package/Case:: TO-261-4, TO-261AA

Packaging:: Tape & Reel (TR)

Product Status:: Active

Transistor Type:: PNP

Current - Collector (Ic) (Max):: 6 A

Voltage - Collector Emitter Breakdown (Max):: 60 V

Vce Saturation (Max) @ Ib, Ic:: 260mV @ 500mA, 5A

Current - Collector Cutoff (Max):: 50nA

DC Current Gain (hFE) (Min) @ Ic, Vce:: 100 @ 2A, 2V

Power - Max:: 1.6 W

Frequency - Transition:: 120MHz

Operating Temperature:: -55°C ~ 150°C (TJ)

Grade:: Automotive

Qualification:: AEC-Q101

Mounting Type:: Surface Mount

Supplier Device Package:: SOT-223-3

ZX5T1951GQTA FAQ

1.How can I place an order for ZX5T1951GQTA through Aetrix?

Please submit a Request for Quotation (RFQ) for ZX5T1951GQTA on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for ZX5T1951GQTA reliable?

The price and inventory of ZX5T1951GQTA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ZX5T1951GQTA is usually 5 days.

3.What payment methods are accepted for ZX5T1951GQTA?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ZX5T1951GQTA transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for ZX5T1951GQTA?

ZX5T1951GQTA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your ZX5T1951GQTA order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for ZX5T1951GQTA?

For technical support, including ZX5T1951GQTA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ZX5T1951GQTA requirements.

6.How does Aetrix verify that ZX5T1951GQTA is sourced from the original manufacturer or authorized distributors?

All ZX5T1951GQTA products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that ZX5T1951GQTA meets industry standards.

7.What is the process for return or replacement of ZX5T1951GQTA?

All ZX5T1951GQTA units undergo pre-shipment inspection (PSI). If there is an issue with ZX5T1951GQTA, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The ZX5T1951GQTA part is unused and in its original packaging.

Return procedure for ZX5T1951GQTA:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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