Diodes Incorporated ZXTN4006ZTA

Overview

ZXTN4006ZTA from Diodes Incorporated is a 200V NPN bipolar junction transistor optimized for high-voltage LED backlight driving in large-screen TVs. It delivers 1A continuous collector current, supports 3A peak pulse current, and dissipates up to 1.5W in SOT89 package with 83°C/W junction-to-ambient thermal resistance. Its 200V V_CEO and robust 4kV HBM ESD rating enable reliable operation in high-brightness, high-reliability display power stages.

For engineers reviewing the ZXTN4006ZTA datasheet, ZXTN4006ZTA pinout, ZXTN4006ZTA application, or ZXTN4006ZTA equivalent, key selection criteria include breakdown voltage margin above 160V TV bus rails, thermal performance under pulsed LED load conditions, DC current gain stability across -55°C to +125°C, and compatibility with standard SOT89 PCB layout and reflow profiles.

Technical Context

This NPN transistor operates as a high-voltage switch in constant-current LED string drivers, where its 200V BV_CEO provides headroom above typical 120–160V boost converter outputs. The device uses epitaxial planar construction with fully isolated die and optimized base doping to sustain 1A DC while maintaining h_FE ≥ 60 at I_C = 85mA and V_CE = 0.25V.

Switching behavior is characterized by 600ns delay time, 496ns rise time, and 293ns fall time under 160V/150mA test conditions - enabling efficient PWM dimming control without excessive switching loss. Its 147MHz f_T ensures adequate small-signal bandwidth for feedback loop stability in closed-loop current regulation circuits.

Key Specifications

Pinout & Package

Package: SOT89 - Surface-mount plastic package with exposed collector tab for thermal conduction and mechanical anchoring. Dimensions per JEDEC TO-243AA: 4.50 mm × 2.50 mm × 1.50 mm (L × W × H), weight ≈ 0.052 g.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ZXTN2006ZTA and MJD122G, ZXTN4006ZTA uniquely balances 200V capability, SOT89 compactness, and 1.5W thermal performance - making it optimal for space-constrained, high-voltage LED driver designs where board area and reliability are prioritized over raw current headroom.

Availability

ZXTN4006ZTA is available at Aetrix Electronics and suitable for LED TV backlight drivers, commercial display power stages, industrial control panel lighting, and medical imaging display bias circuits requiring stable component supply and long-term manufacturability.

Supply support for ZXTN4006ZTA 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 North America.

ZXTN4006ZTA belongs to Diodes' high-voltage bipolar transistor product line, engineered specifically for energy-efficient, high-reliability LED lighting control in consumer and industrial displays.

FAQ

What is the maximum safe operating voltage for ZXTN4006ZTA in continuous DC mode?

The absolute maximum collector-emitter voltage (V_CEO) is 200 V under DC conditions at T_A = +25°C. Operation above 160 V is permitted only with appropriate derating per the datasheet's thermal curve - e.g., at 100°C ambient, max V_CEO reduces to ~185 V due to junction temperature limits. Always maintain ≥20% voltage margin over peak system rail.

Can ZXTN4006ZTA be used in linear (analog) dimming mode, not just PWM?

Yes - its specified V_BE(on) of 0.72–0.95 V at I_C = 150 mA and stable h_FE across current range support analog current control. However, linear operation increases power dissipation; at 1A and V_CE = 2 V, P_D reaches 2 W - exceeding rated 1.5 W unless PCB thermal design is enhanced beyond the standard 18 mm × 18 mm copper pad.

Is the SOT89 package lead finish compatible with lead-free reflow soldering?

Yes - the matte tin-plated leads meet MIL-STD-202, Method 208, and are qualified for lead-free reflow profiles (peak temperature ≤ 260°C, 60-second duration). The "Green" molding compound is UL 94V-0 rated and halogen-free, supporting IPC-J-STD-020 moisture sensitivity level 1 handling without baking.

Does ZXTN4006ZTA require external base current limiting in standard switching applications?

Yes - because its h_FE ranges from 60 to 100, base current must be sized to ensure saturation at worst-case gain. For 1A I_C, minimum I_B = 1A / 60 ≈ 16.7 mA; typical design uses 20–25 mA with a series resistor. Undersized base drive risks V_CE(sat) increase and thermal runaway under high ambient temperatures.