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

Diodes Incorporated ZXTN4002ZTA

Name: ZXTN4002ZTA
Brand: Diodes Incorporated
SKU: ZXTN4002ZTA
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: ZXTN4002ZTA

Manufacturer:: Diodes Incorporated

Category:: Single Bipolar Transistors

Package:: TO-243AA

Datasheet:: ZXTN4002ZTA.pdf

Description:: TRANS NPN 100V 1A SOT-89-3

Quantity:: RFQ Add To RFQ list

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Inventory:2,225

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Product details

Overview

ZXTN4002ZTA from Diodes Incorporated is a 100V NPN bipolar junction transistor optimized for LED backlight driving in LCD TVs, featuring BV_CEO ≥ 100 V, I_C(cont) = 1 A, h_FE > 100 at 150 mA / 200 mV, SOT89 package, and AEC-Q101 qualification for high-reliability industrial and display applications.

For engineers reviewing the ZXTN4002ZTA datasheet, ZXTN4002ZTA pinout, ZXTN4002ZTA application, or ZXTN4002ZTA equivalent, key selection criteria include high-voltage switching capability (100 V), robust continuous current handling (1 A), low V_BE(on) (0.72–0.95 V), fast switching times (t_s = 1540 ns, t_f = 251 ns), and thermal performance (R_θJL = 22.44 °C/W) in SOT89.

Technical Context

This NPN transistor operates as a high-voltage, medium-current switch in constant-current LED string drivers. Its 100 V V_CEO rating supports operation across wide input rails (e.g., 48–80 V DC bus), while its h_FE ≥ 100 at 150 mA ensures stable base drive efficiency under typical backlight bias conditions.

Thermal design leverages the SOT89 package's low R_θJL (22.44 °C/W) to sustain 1.5 W power dissipation on standard FR4 PCBs. Switching behavior is characterized under pulsed conditions (300 µs, ≤2% duty cycle), with measured t_d/t_r/t_s/t_f enabling predictable timing in PWM-dimmed LED drivers.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	100 V - Enables direct switching of LED strings powered from 48–80 V supplies without external voltage clamping.
I_C(cont)	1 A - Supports driving up to 8–12 parallel LED strings at 80–120 mA each in TV backlight modules.
h_FE	≥100 @ 150 mA/0.2 V - Reduces required base drive current, easing MCU GPIO or driver IC loading in compact designs.
V_BE(on)	0.72–0.95 V @ 150 mA - Minimizes base power loss and improves efficiency in high-duty-cycle PWM dimming.
R_θJL	22.44 °C/W - Allows 1.5 W dissipation with <10 °C rise above solder point, simplifying thermal layout on single-layer PCBs.
t_s + t_f	1791 ns total - Ensures clean turn-off transitions in 1–5 kHz PWM dimming, reducing LED current overshoot and EMI.

Pinout & Package

Package: SOT89 - surface-mount plastic package with exposed collector tab for enhanced thermal conduction and mechanical anchoring; UL 94V-0 rated, MSL Level 1, matte tin terminals, 0.052 g weight.

Pin/Terminal	Circuit Role	Design Meaning
Pin 1 (Emitter)	Current sink node	Connected to ground or current-sense resistor; low-impedance path for full LED string return current.
Pin 2 (Base)	Control input	Receives TTL- or CMOS-compatible drive; requires ~1.5 mA for full saturation at 150 mA load.
Pin 3 (Collector)	High-side switch output	Connected to LED anode(s); electrically and thermally tied to exposed metal tab for heat spreading.

Key Features

Feature	Design Value
AEC-Q101 qualified	Validated for automotive-grade reliability (−55°C to +150°C TJ), supporting industrial display and transportation lighting use.
100 V breakdown rating	Eliminates need for external snubbers or TVS diodes in 48–80 V LED supply rails, reducing BOM count and board space.
SOT89 thermal performance	R_θJL = 22.44 °C/W enables 1.5 W operation without heatsink on standard FR4, lowering system cost and assembly complexity.
Lead-free & halogen-free	Complies with RoHS and Diodes Inc.'s "Green" policy - no antimony, bromine, or intentionally added lead.

Applications

LED TV Backlight Driver

Industrial Panel Display

Use Scenario: Driving 6–10 parallel white LED strings in 32–55 inch LCD TVs with PWM dimming at 1–3 kHz.

IC Role / Device Role: High-voltage NPN switch controlling LED cathode current path; operated in saturation for minimal conduction loss.

Use Value: 100 V V_CEO withstands transient surges on 72 V bus; 1 A rating supports multi-string scalability without paralleling devices.

Use Scenario: Constant-current LED array control in factory HMIs, medical displays, and outdoor kiosks operating at −40°C to +85°C ambient.

IC Role / Device Role: Robust discrete switch replacing less reliable MOSFETs in high-temp, high-humidity environments.

Use Value: AEC-Q101 qualification and −55°C to +150°C T_J range ensure long-term stability where conformal coating and thermal cycling are critical.

Commercial Signage Lighting

Automotive Interior Lighting

Use Scenario: Modular LED strip drivers in retail signage with 24–48 V input and analog/PWM dimming interfaces.

IC Role / Device Role: Primary current-switching element in linear or quasi-resonant LED driver stages.

Use Value: Low V_BE(on) (0.72 V) minimizes base drive power; h_FE ≥ 100 ensures consistent gain across production lots.

Use Scenario: Dome light and map light drivers in passenger vehicles requiring ISO 16750-compliant surge immunity and extended temperature operation.

IC Role / Device Role: High-reliability switching transistor in non-safety-critical interior lighting modules.

Use Value: Qualified to AEC-Q101 and rated for 150°C junction temperature - exceeds automotive cabin thermal requirements without derating.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
ZXTN2002ZTA	V_CEO = 60 V, I_C = 1 A, h_FE ≥ 100 - lower voltage rating, same package and gain.	Suitable only for ≤48 V LED supplies; not recommended for 72 V bus systems.	Select when input voltage is capped at 48 V and cost sensitivity outweighs voltage margin.
MJD122G	V_CEO = 100 V, I_C = 1.5 A, h_FE = 40–120 - higher current but wider h_FE spread and TO-252 package.	Requires larger PCB footprint and different thermal layout; less precise gain control in closed-loop drivers.	Prefer when peak current >1 A is needed and SOT89 thermal constraints are not limiting.

Compared with ZXTN2002ZTA and MJD122G, ZXTN4002ZTA uniquely balances 100 V capability, tight h_FE consistency, SOT89 thermal efficiency, and AEC-Q101 compliance - making it optimal for space-constrained, high-reliability LED backlighting where voltage margin and gain predictability are critical.

Availability

ZXTN4002ZTA is available at Aetrix Electronics and suitable for LED TV backlight driver modules, industrial panel displays, and commercial signage lighting requiring stable component supply, long-lifecycle support, and AEC-Q101 traceability.

Supply support for ZXTN4002ZTA 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-efficiency power management, signal integrity, and protection solutions for industrial, computing, and consumer markets.

ZXTN4002ZTA belongs to Diodes' high-voltage bipolar transistor product line, engineered specifically for LED current switching in display backlighting and general-purpose industrial power control applications demanding reliability and thermal efficiency.

FAQ

What is the maximum safe operating temperature for ZXTN4002ZTA?

The ZXTN4002ZTA has a specified junction temperature range of −55°C to +150°C and is qualified per AEC-Q101. Under continuous 1 A operation on a 25 mm × 25 mm FR4 PCB with 1 oz copper, junction temperature remains below 125°C when ambient is ≤85°C - verified by R_θJA = 83 °C/W and R_θJL = 22.44 °C/W data.

Can ZXTN4002ZTA be used in linear regulator configurations?

No - ZXTN4002ZTA is optimized for switching operation in saturation/cutoff modes, not linear regulation. Its SOA curve and thermal resistance are validated for pulsed and switched loads, not continuous linear dissipation. For linear applications, Diodes' ZTX series or dedicated LDOs are recommended.

Does ZXTN4002ZTA require a base resistor in PWM-driven LED circuits?

Yes - a series base resistor is mandatory to limit IB and ensure saturation. With h_FE ≥ 100 at 150 mA, ~1.5 mA base current is required; using a 3.3 kΩ resistor with 5 V drive yields ~1.5 mA, providing sufficient overdrive while avoiding excessive base power loss.

Is ZXTN4002ZTA compatible with lead-free reflow profiles?

Yes - ZXTN4002ZTA is RoHS-compliant and rated for MSL Level 1 per J-STD-020, meaning it can withstand multiple reflow cycles up to 260°C peak without preconditioning. The matte tin finish and green molding compound are fully compatible with standard lead-free soldering processes.

ZXTN4002ZTA 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):: 1 A

Voltage - Collector Emitter Breakdown (Max):: 100 V

Vce Saturation (Max) @ Ib, Ic:: -

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

DC Current Gain (hFE) (Min) @ Ic, Vce:: 100 @ 150mA, 200mV

Power - Max:: 1.5 W

Frequency - Transition:: -

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

Grade:: Automotive

Qualification:: AEC-Q101

Mounting Type:: Surface Mount

Supplier Device Package:: SOT-89-3

ZXTN4002ZTA FAQ

1.How can I place an order for ZXTN4002ZTA through Aetrix?

Please submit a Request for Quotation (RFQ) for ZXTN4002ZTA 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 ZXTN4002ZTA reliable?

The price and inventory of ZXTN4002ZTA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ZXTN4002ZTA is usually 5 days.

3.What payment methods are accepted for ZXTN4002ZTA?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ZXTN4002ZTA transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for ZXTN4002ZTA?

ZXTN4002ZTA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your ZXTN4002ZTA 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 ZXTN4002ZTA?

For technical support, including ZXTN4002ZTA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ZXTN4002ZTA requirements.

6.How does Aetrix verify that ZXTN4002ZTA is sourced from the original manufacturer or authorized distributors?

All ZXTN4002ZTA 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 ZXTN4002ZTA meets industry standards.

7.What is the process for return or replacement of ZXTN4002ZTA?

All ZXTN4002ZTA units undergo pre-shipment inspection (PSI). If there is an issue with ZXTN4002ZTA, 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 ZXTN4002ZTA part is unused and in its original packaging.

Return procedure for ZXTN4002ZTA:

1.Submit a request within 90 days.

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

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