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

Diodes Incorporated ZXTN2031FTA

Name: ZXTN2031FTA
Brand: Diodes Incorporated
SKU: ZXTN2031FTA
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: ZXTN2031FTA

Manufacturer:: Diodes Incorporated

Category:: Single Bipolar Transistors

Package:: TO-236-3, SC-59, SOT-23-3

Datasheet:: ZXTN2031FTA.pdf

Description:: TRANS NPN 50V 5A SOT-23-3

Quantity:: RFQ Add To RFQ list

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Inventory:15,525

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Product details

Overview

ZXTN2031FTA from Diodes Incorporated is a 50V NPN medium-power transistor in SOT23 package, rated for 5A continuous collector current and 80V forward blocking voltage (BVCEV), with low saturation voltage (V_CE(SAT) < 40mV @1A) and on-resistance (R_CE(SAT) = 24mΩ). It is AEC-Q101 qualified and used in MOSFET/IGBT gate driving and motor control circuits.

For engineers reviewing the ZXTN2031FTA datasheet, ZXTN2031FTA pinout, ZXTN2031FTA application, or ZXTN2031FTA equivalent, key selection criteria include V_CE(SAT) at high I_C, thermal resistance (R_θJA = 125°C/W on 18mm × 18mm Cu), safe operating area (SOA) limits, and AEC-Q101 qualification for automotive-grade reliability.

Technical Context

This NPN bipolar junction transistor operates in linear and switching modes with h_FE ranging from 190 to 560 across I_C = 10mA–5A and V_CE = 2V. Its BV_CEO = 50V and BV_CEV = 80V support robust blocking in inductive load switching.

Thermal design is enabled by R_θJL = 57°C/W (junction-to-lead) and derated power dissipation: 1.0W at T_A = 25°C, dropping to zero at T_A = 125°C on 18mm × 18mm 2oz Cu PCB. ESD ratings meet JEDEC HBM Class 3A (4kV) and MM (400V).

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	50 V - Maximum DC collector-emitter voltage before breakdown under open-base conditions
I_C (continuous)	5 A - Sustained collector current capability without thermal runaway on standard PCB layout
V_CE(SAT) @ I_C=1A	< 40 mV - Enables <100mW conduction loss at 1A, critical for high-efficiency gate drive stages
R_CE(SAT)	24 mΩ - Equivalent on-resistance derived from V_CE(SAT)/I_C, simplifying loss modeling vs. MOSFETs
h_FE @ I_C=5A	340–560 - High current gain ensures low base drive requirement in saturated switch applications
T_J range	−55°C to +150°C - Supports operation in under-hood automotive environments and industrial motor drives
ESD HBM	4000 V - Robust handling during board assembly and system integration without additional protection

Pinout & Package

Package: SOT23 (JEDEC TO-236AB), molded green plastic housing, matte tin-plated leads, 0.008g weight, moisture sensitivity level 1.

Pin/Terminal	Circuit Role	Design Meaning
1 (Emitter)	E	Current return path; connected to ground or low-side reference in common-emitter switching
2 (Base)	B	Control input; requires ~250mA peak drive for full saturation at I_C = 5A
3 (Collector)	C	High-current output node; thermally coupled to PCB copper via lead for enhanced heat transfer (R_θJL = 57°C/W)

Key Features

Feature	Design Value
Low V_CE(SAT) at high current	13–40mV range up to 5A enables sub-100mW conduction loss in gate drivers and relay drivers
AEC-Q101 qualification	Validated for automotive applications including engine control modules and body electronics
Complementary PNP pairing	ZXTP2025F provides matched performance for push-pull output stages and H-bridge drivers
Green, halogen-free construction	<900ppm Br/Cl, <1000ppm Sb - compliant with global environmental regulations and soldering standards

Applications

MOSFET Gate Driver

DC-DC Converter Switch

Use Scenario: Driving the gate of a high-side N-channel MOSFET in a synchronous buck converter.

IC Role / Device Role / Timing Role: NPN switch providing fast, low-loss turn-on pulse with minimal Miller capacitance interaction.

Use Value: V_CE(SAT) < 40mV at 1A reduces driver-stage power loss; SOA supports 100µs–1ms pulses at 5A.

Use Scenario: Low-side switching in non-isolated boost or flyback converters.

IC Role / Device Role / Timing Role: Primary current-handling switch replacing small-signal transistors where higher I_C and lower R_CE(SAT) are required.

Use Value: 5A continuous rating and 12A peak allow handling of transient overloads without derating; R_CE(SAT) = 24mΩ minimizes conduction loss vs. standard BJT alternatives.

Automotive Relay Driver

Industrial Solenoid Control

Use Scenario: Controlling 12V automotive relays in body control modules (BCM).

IC Role / Device Role / Timing Role: High-current interface between microcontroller GPIO and relay coil, with built-in flyback protection compatibility.

Use Value: BV_CEV = 80V withstands inductive kickback; AEC-Q101 qualification ensures reliability across temperature and vibration profiles.

Use Scenario: Actuating 24V industrial solenoids in PLC I/O modules.

IC Role / Device Role / Timing Role: Robust discrete switch interfacing logic-level signals to high-energy mechanical loads.

Use Value: −55°C to +150°C operating range supports harsh factory-floor environments; 1.0W power rating sustains duty cycles up to 30% at 5A with proper heatsinking.

Equivalent & Alternatives

The following parts are listed as comparable options for similar NPN medium-power transistor applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
ZXTN2012E6TA	Lower V_CEO (30V), lower I_C (2A), same SOT23 package	Suitable only for ≤24V systems; not recommended for 48V or automotive 12V/24V with surge margin	Select when cost sensitivity outweighs voltage headroom and thermal margin requirements
MMBT4401LT1G	Higher V_CEO (40V), lower I_C (600mA), no AEC-Q101 qualification	Lacks automotive qualification and high-current capability; limited to signal-level switching	Choose only for non-automotive, low-power general-purpose use where qualification and SOA are not required

Compared with ZXTN2031FTA, ZXTN2012E6TA trades voltage and current headroom for cost, while MMBT4401LT1G offers broader availability but lacks AEC-Q101 validation and fails to meet 5A/50V operational demands in gate drive or motor control.

Availability

ZXTN2031FTA is available at Aetrix Electronics and suitable for MOSFET gate driving, automotive relay control, and industrial DC-DC converter designs requiring stable component supply and AEC-Q101 compliance.

Supply support for ZXTN2031FTA 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 computing markets.

ZXTN2031FTA belongs to Diodes' ZXT series of medium-power transistors engineered for high-current switching in space-constrained applications such as gate drivers, motor controls, and power conversion stages.

FAQ

What is the maximum allowable base current for reliable operation?

The absolute maximum base current is 1.2A per datasheet Absolute Maximum Ratings. For sustained 5A collector current, the recommended peak base drive is 250mA (I_C/I_B = 20), ensuring saturation without excessive base power dissipation or thermal stress on the bond wires.

Does ZXTN2031FTA require external base resistors in gate-drive applications?

Yes - a series base resistor is required to limit peak base current and prevent damage during fast switching. For 3.3V or 5V MCU outputs driving at I_B = 250mA, a 12–20Ω resistor (1/4W) is typical, sized to account for V_BE(sat) ≈ 0.9V and MCU output impedance.

How does its thermal performance compare between 18mm×18mm and 30mm×30mm copper areas?

R_θJA improves from 125°C/W (18mm×18mm) to 104°C/W (30mm×30mm) at steady-state. This yields ~17% higher power dissipation margin at 25°C ambient - e.g., 1.0W vs. 1.2W - making larger copper beneficial for continuous 5A operation in enclosed enclosures.

Is ZXTP2025F truly complementary, and how closely do their parameters match?

Yes - ZXTP2025F is the designated complementary PNP, sharing identical SOT23 package, AEC-Q101 qualification, 5A I_C, 50V V_CEO, and matched V_CE(SAT) (<45mV @1A). h_FE curves and SOA boundaries are symmetrically aligned, enabling balanced push-pull stage design without gain skew.

ZXTN2031FTA Specifications

Product attributes: Attribute value

Manufacturer:: Diodes Incorporated

Series:: -

Package/Case:: TO-236-3, SC-59, SOT-23-3

Packaging:: Tape & Reel (TR)

Product Status:: Active

Transistor Type:: NPN

Current - Collector (Ic) (Max):: 5 A

Voltage - Collector Emitter Breakdown (Max):: 50 V

Vce Saturation (Max) @ Ib, Ic:: 170mV @ 250mA, 5A

Current - Collector Cutoff (Max):: 20nA (ICBO)

DC Current Gain (hFE) (Min) @ Ic, Vce:: 200 @ 500mA, 2V

Power - Max:: 1.2 W

Frequency - Transition:: 125MHz

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

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: SOT-23-3

ZXTN2031FTA FAQ

1.How can I place an order for ZXTN2031FTA through Aetrix?

Please submit a Request for Quotation (RFQ) for ZXTN2031FTA 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 ZXTN2031FTA reliable?

The price and inventory of ZXTN2031FTA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ZXTN2031FTA is usually 5 days.

3.What payment methods are accepted for ZXTN2031FTA?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ZXTN2031FTA transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for ZXTN2031FTA?

ZXTN2031FTA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your ZXTN2031FTA 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 ZXTN2031FTA?

For technical support, including ZXTN2031FTA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ZXTN2031FTA requirements.

6.How does Aetrix verify that ZXTN2031FTA is sourced from the original manufacturer or authorized distributors?

All ZXTN2031FTA 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 ZXTN2031FTA meets industry standards.

7.What is the process for return or replacement of ZXTN2031FTA?

All ZXTN2031FTA units undergo pre-shipment inspection (PSI). If there is an issue with ZXTN2031FTA, 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 ZXTN2031FTA part is unused and in its original packaging.

Return procedure for ZXTN2031FTA:

1.Submit a request within 90 days.

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

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