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

Diodes Incorporated ZXTN25020DZTA

Name: ZXTN25020DZTA
Brand: Diodes Incorporated
SKU: ZXTN25020DZTA
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: ZXTN25020DZTA

Manufacturer:: Diodes Incorporated

Category:: Single Bipolar Transistors

Package:: TO-243AA

Datasheet:: ZXTN25020DZTA.pdf

Description:: TRANS NPN 20V 6A SOT-89-3

Quantity:: RFQ Add To RFQ list

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Inventory:1,280

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Product details

Overview

ZXTN25020DZTA from Diodes Incorporated is a 20V NPN high-gain bipolar junction transistor in SOT89 package, rated for 6.0A continuous collector current, with V_CE(sat) < 48mV at 1A and R_sat = 30mΩ, designed for low-loss switching in LED drivers, motor control, and MOSFET gate drive circuits.

For engineers reviewing the ZXTN25020DZTA datasheet, ZXTN25020DZTA pinout, ZXTN25020DZTA application, or ZXTN25020DZTA equivalent, key selection criteria include its 20V V_CEO, 6A I_C, 2.4W power dissipation at T_A = +25°C with 51°C/W R_θJA on 50mm×50mm copper, and complementary PNP pairing with ZXTP25020DZ.

Technical Context

This NPN transistor operates as a high-current, low-saturation switch optimized for DC-DC converter topologies and active load control. Its BV_CEO = 20V and BV_CEX = 100V support both standard and forward-blocking configurations in boost and inverter stages.

The device delivers h_FE = 300–900 across I_C = 10mA to 15A, f_T = 215MHz, and C_obo = 16.5–25pF, enabling fast switching with controlled turn-on/turn-off timing (t_d = 67.7ns, t_r = 72.2ns, t_s = 361ns, t_f = 63.9ns) under pulsed conditions (≤300μs, ≤2% duty).

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	20V - Maximum safe collector-emitter voltage in normal forward-active operation
I_C (continuous)	6.0A - Sustained DC current handling capability with thermal derating above +25°C
V_CE(sat)	48mV @ 1A/100mA - Low conduction loss enabling high-efficiency switching below 50mV threshold
R_sat	30mΩ - Equivalent on-resistance derived from V_CE(sat)/I_C, critical for power loss calculation
P_D	2.4W @ T_A = +25°C on 50mm×50mm 2oz Cu - Practical power limit for surface-mount thermal management
h_FE	300 min @ I_C = 10mA - High DC current gain reduces required base drive current
f_T	215MHz - Transition frequency supporting >100kHz switching in power stages

Pinout & Package

Package: SOT89 - Surface-mount plastic case with exposed collector tab for thermal conduction; dimensions: 4.50 × 2.50 × 1.05 mm (L × W × H); weight ≈ 0.05 g; UL 94V-0 rated molding compound.

Pin/Terminal	Circuit Role	Design Meaning
Pin 1 (Emitter)	E	Current return path; connected to ground or low-side reference in common-emitter switches
Pin 2 (Collector)	C	Main current output terminal; electrically and thermally tied to exposed metal tab for heatsinking
Pin 3 (Base)	B	Control input; requires ~300mA peak drive for full 6A saturation per datasheet test condition

Key Features

Feature	Design Value
Low V_CE(sat)	48mV @ 1A enables <50mW conduction loss, reducing thermal stress in high-duty-cycle applications
High h_FE range	300–900 supports stable DC biasing across production lots and temperature without feedback compensation
Exposed collector tab	SOT89 thermal pad delivers R_θJC = 7.95°C/W, allowing direct PCB copper connection for enhanced heat transfer
Automotive-ready construction	Totally lead-free, halogen- and antimony-free "Green" formulation compliant with RoHS 3 and AEC-Q101 qualification path

Applications

LED Driving

MOSFET Gate Drivers

Use Scenario: Constant-current switching for automotive interior lighting and emergency strobes.

IC Role / Device Role / Timing Role: NPN switch controlling LED anode current in high-side or low-side configurations.

Use Value: 48mV V_CE(sat) minimizes voltage headroom loss, preserving efficiency in 12V systems with tight forward-voltage margins.

Use Scenario: Fast-turn-on driver for logic-level N-channel MOSFETs in DC-DC converters.

IC Role / Device Role / Timing Role: Active pull-down stage accelerating gate discharge during turn-off transitions.

Use Value: 361ns storage time and 63.9ns fall time enable sub-100ns gate discharge, supporting >500kHz switching frequencies.

Boost Converters

Camera Strobe Circuits

Use Scenario: Main switching transistor in non-isolated boost regulators powering display backlights.

IC Role / Device Role / Timing Role: Synchronous rectifier or main switch operating in discontinuous conduction mode.

Use Value: 215MHz f_T and low C_obo (16.5pF) reduce switching losses and improve loop stability at 200–500kHz.

Use Scenario: High-pulse-current switch for xenon flash capacitor discharge in industrial imaging systems.

IC Role / Device Role / Timing Role: Primary discharge switch triggered by microcontroller GPIO with minimal propagation delay.

Use Value: 15A I_CM peak rating and 30mΩ R_sat sustain >10A pulses with <100mV overshoot, ensuring consistent flash intensity.

Equivalent & Alternatives

The following parts are listed as comparable options for similar NPN high-current switching applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
ZXTN2012E6TA	V_CEO = 12V, I_C = 3A, V_CE(sat) = 100mV @ 1A - lower voltage rating and higher saturation loss	Limited to ≤12V systems; unsuitable for 20V boost or 24V motor drive rails	Select only when board space constraints require SOT23-6 and voltage margin is ≥5V below rail
MMBT4401LT1G	V_CEO = 40V, I_C = 600mA, V_CE(sat) = 750mV @ 150mA - 10× lower current, 15× higher saturation voltage	Only viable for signal-level switching or low-power logic buffering, not power switching	Use only for base-drive isolation or level-shifting where <1A load current is guaranteed

Compared with ZXTN25020DZTA, ZXTN2012E6TA trades voltage headroom and efficiency for smaller footprint, while MMBT4401LT1G sacrifices all power-handling capability for general-purpose availability - neither matches the 6A/20V/48mV combination essential for high-efficiency power switching.

Availability

ZXTN25020DZTA is available at Aetrix Electronics and suitable for LED driving, motor control, and camera strobe applications requiring stable component supply, automotive-grade material compliance, and SOT89 thermal performance.

Supply support for ZXTN25020DZTA 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 distribution operations across Asia, Europe, and the Americas.

ZXTN25020DZTA belongs to Diodes' ZXT series of high-gain, high-current transistors engineered specifically for power switching in automotive lighting, industrial motor drives, and portable power conversion systems.

FAQ

What is the maximum allowable junction temperature for ZXTN25020DZTA?

The absolute maximum junction temperature is +150°C, with continuous operation specified from –55°C to +150°C. Derating begins at +25°C ambient: for example, at T_A = +85°C on a 50mm×50mm 2oz copper PCB, usable power drops to ~1.2W based on R_θJA = 51°C/W.

Is ZXTN25020DZTA qualified to AEC-Q101?

ZXTN25020DZTA is built in IATF 16949-certified facilities and meets Diodes' internal "automotive-grade" process controls; however, it is not formally AEC-Q101-qualified. For certified automotive use, contact Diodes directly to request PPAP-capable AEC-Q101 variants such as ZXTN25020DZQTA.

Can ZXTN25020DZTA replace a MOSFET in low-side switching applications?

No - it is a bipolar transistor requiring sustained base current (e.g., 300mA for 6A I_C), unlike MOSFETs that need only gate charge. Its 30mΩ R_sat is competitive, but base drive complexity and lack of inherent body diode make it unsuitable as a drop-in MOSFET replacement in synchronous rectifiers or half-bridges.

What is the marking code on the ZXTN25020DZTA package?

The top-side marking is "1K8", which corresponds to the product type code for ZXTN25020DZ per Diodes' SOT89 marking convention. This code is laser-etched on the molded plastic body and verified under magnification per MIL-STD-202 Method 208 solderability testing.

ZXTN25020DZTA Specifications

Product attributes: Attribute value

Manufacturer:: Diodes Incorporated

Series:: -

Package/Case:: TO-243AA

Packaging:: Tape & Reel (TR)

Product Status:: Active

Transistor Type:: NPN

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

Voltage - Collector Emitter Breakdown (Max):: 20 V

Vce Saturation (Max) @ Ib, Ic:: 270mV @ 300mA, 6A

Current - Collector Cutoff (Max):: 50nA (ICBO)

DC Current Gain (hFE) (Min) @ Ic, Vce:: 300 @ 10mA, 2V

Power - Max:: 2.4 W

Frequency - Transition:: 215MHz

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

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: SOT-89-3

ZXTN25020DZTA FAQ

1.How can I place an order for ZXTN25020DZTA through Aetrix?

Please submit a Request for Quotation (RFQ) for ZXTN25020DZTA 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 ZXTN25020DZTA reliable?

The price and inventory of ZXTN25020DZTA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ZXTN25020DZTA is usually 5 days.

3.What payment methods are accepted for ZXTN25020DZTA?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ZXTN25020DZTA transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for ZXTN25020DZTA?

ZXTN25020DZTA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your ZXTN25020DZTA 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 ZXTN25020DZTA?

For technical support, including ZXTN25020DZTA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ZXTN25020DZTA requirements.

6.How does Aetrix verify that ZXTN25020DZTA is sourced from the original manufacturer or authorized distributors?

All ZXTN25020DZTA 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 ZXTN25020DZTA meets industry standards.

7.What is the process for return or replacement of ZXTN25020DZTA?

All ZXTN25020DZTA units undergo pre-shipment inspection (PSI). If there is an issue with ZXTN25020DZTA, 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 ZXTN25020DZTA part is unused and in its original packaging.

Return procedure for ZXTN25020DZTA:

1.Submit a request within 90 days.

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

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