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Home > Products > Discrete Semiconductor Products > Transistors > Bipolar (BJT) > Bipolar Transistor Arrays

Diodes Incorporated ZXTD4591E6TA

Name: ZXTD4591E6TA
Brand: Diodes Incorporated
SKU: ZXTD4591E6TA
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: ZXTD4591E6TA

Manufacturer:: Diodes Incorporated

Category:: Bipolar Transistor Arrays

Package:: SOT-23-6

Datasheet:: ZXTD4591E6TA.pdf

Description:: TRANS NPN/PNP 60V 1A SOT23-6

Quantity:: RFQ Add To RFQ list

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Product details

Overview

ZXTD4591E6TA from Diodes Incorporated is a complementary NPN/PNP medium-power transistor pair in a single SOT26 package, rated for ±60V V_CEO, ±1A continuous collector current, and low saturation voltages (0.25V/–0.3V typ @ 1A). It delivers matched h_FE characterization up to 2A and low equivalent on-resistance (R_SAT = 210mΩ / 355mΩ), enabling compact dual-polarity switching in gate drive and DC-DC converter stages.

For engineers reviewing the ZXTD4591E6TA datasheet, ZXTD4591E6TA pinout, ZXTD4591E6TA application, or ZXTD4591E6TA equivalent, key selection criteria include complementary BV_CEO symmetry, simultaneous high-current saturation performance, AEC-Q101 qualification, thermal resistance (R_θJA = 73–113°C/W), and SOT26 lead-free packaging compliance.

Technical Context

This device integrates two discrete silicon bipolar transistors-NPN and PNP-on a single die substrate within a thermally optimized SOT26 package. Each transistor supports independent biasing with fully characterized DC gain (h_FE = 15–300 across 1mA–2A) and low V_CE(sat) under high-current pulsed and continuous operation.

The complementary structure enables push-pull output stages without external pairing, while its ±60V breakdown ratings, 4kV HBM ESD robustness, and –55°C to +150°C operating range support automotive-grade reliability in motor control and power conversion circuits where voltage symmetry and thermal stability are critical.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	±60V - Enables symmetric rail-to-rail switching in half-bridge and H-bridge drivers up to 60V bus voltage.
I_C (cont.)	±1A - Supports sustained load currents in low-power motor drivers and synchronous rectifier applications.
V_CE(sat)	0.25V (NPN) / –0.3V (PNP) @ 1A - Minimizes conduction loss and self-heating during active switching.
h_FE	15–300 @ I_C = 1mA–2A - Ensures predictable base drive requirements across wide current range.
R_θJA	73–113°C/W - Dictates maximum power dissipation (1.1–1.7W) on standard FR4 PCBs without heatsinking.
ESD HBM	4,000V - Provides robust handling margin during automated assembly and board-level integration.

Pinout & Package

Package: SOT26 - Molded plastic, green compound (UL 94V-0), matte tin-plated leads, 0.015g weight, moisture sensitivity level 1.

Pin/Terminal	Circuit Role	Design Meaning
C1	NPN Collector	Main current sink node for NPN side; electrically isolated from PNP collector (C2).
E1	NPN Emitter	Reference terminal for NPN biasing; tied to common emitter in push-pull configurations.
B1	NPN Base	Control input for NPN transistor; requires ~100mA base drive at 1A collector current.
C2	PNP Collector	Main current source node for PNP side; separate from C1 for independent circuit routing.
E2	PNP Emitter	Reference terminal for PNP biasing; often connected to positive rail in high-side switch roles.
B2	PNP Base	Control input for PNP transistor; driven negative relative to E2 for turn-on.

Key Features

Feature	Design Value
Complementary NPN/PNP pairing	Single-package integration eliminates layout mismatch and timing skew between polarities.
Low R_SAT (210mΩ / 355mΩ)	Reduces power loss in high-duty-cycle switching, improving efficiency in DC-DC converters.
AEC-Q101 qualified	Validated for automotive electronics including body control modules and HVAC actuators.
Lead-free & halogen-free	Meets RoHS 2 and JEDEC J-STD-020 standards for environmentally compliant manufacturing.

Applications

MOSFET Gate Driver

Low Power Motor Drive

Use Scenario: Driving high- and low-side N-channel MOSFETs in half-bridge configurations for BLDC fan control.

IC Role / Device Role / Timing Role: Complementary bipolar pair provides fast, low-loss pull-up (PNP) and pull-down (NPN) current sourcing/sinking for gate charging/discharging.

Use Value: Achieves <100ns transition times with minimal shoot-through risk due to matched V_CE(sat) and h_FE symmetry.

Use Scenario: Bidirectional current control in 12V automotive window lift or seat adjuster motors.

IC Role / Device Role / Timing Role: Acts as H-bridge output stage with integrated polarity reversal capability using four external control lines.

Use Value: Eliminates need for discrete transistor pairing, reducing BOM count and PCB area by 40% versus dual-SOT23 solution.

Low Power DC-DC Converter

Automotive Body Control Module

Use Scenario: Synchronous rectification in 5V/3A buck converter for infotainment power supply.

IC Role / Device Role / Timing Role: Replaces Schottky diode with actively controlled PNP/NPN pair to reduce forward drop and improve light-load efficiency.

Use Value: Low V_CE(sat) cuts conduction loss by >65% vs. 0.4V Schottky, raising full-load efficiency to 92%.

Use Scenario: Load switching for LED lighting, solenoid valves, and relay coils in vehicle interior modules.

IC Role / Device Role / Timing Role: High-voltage, high-current driver for resistive and inductive loads requiring reverse polarity protection and fast turn-off.

Use Value: ±60V rating withstands automotive load dump transients; 4kV HBM prevents ESD failure during service replacement.

Equivalent & Alternatives

The following parts are listed as comparable options for similar complementary bipolar transistor applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
ZXTD0904N8TA	Lower V_CEO (±40V), higher h_FE (min 200 @ 1A), same SOT26 package	Better suited for 24V industrial logic-level drivers; insufficient for 48V+ automotive bus systems	Select when higher DC gain and lower voltage stress are prioritized over breakdown margin.
MBT3904DW1T1G	Lower I_C (±200mA), no AEC-Q101 qualification, SC-70-6 package	Limited to signal-level or low-current logic translation; not suitable for power switching	Choose only for space-constrained, non-automotive signal inversion-not for power delivery.

Compared with ZXTD0904N8TA and MBT3904DW1T1G, ZXTD4591E6TA uniquely balances ±60V ruggedness, ±1A current capability, and AEC-Q101 compliance-making it the only option among the three qualified for automotive 12V/48V power switching with thermal derating headroom.

Availability

ZXTD4591E6TA is available at Aetrix Electronics and suitable for MOSFET gate drivers, low-power motor drives, and low-power DC-DC converters requiring stable component supply and automotive-grade reliability.

Supply support for ZXTD4591E6TA 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 consumer markets.

ZXTD4591E6TA belongs to Diodes' ZXT series of complementary bipolar transistors, designed specifically for space-constrained, high-efficiency power switching in automotive body electronics and portable power systems.

FAQ

What is the maximum continuous power dissipation for ZXTD4591E6TA on a standard PCB?

ZXTD4591E6TA has a maximum power dissipation of 1.7W under short-duration conditions (t < 5s) and 1.1W in steady-state operation on a 25mm × 25mm 1oz copper pad, per datasheet Note 6 and 7. This corresponds to R_θJA values of 73°C/W and 113°C/W respectively, limiting usable power based on ambient temperature and airflow.

Can ZXTD4591E6TA be used in linear amplifier applications?

No-ZXTD4591E6TA is optimized for switching operation, not linear amplification. Its h_FE variation across current (15–300) and lack of specified linearity parameters (e.g., distortion, frequency response) make it unsuitable for analog gain stages. It is intended for saturated-switch mode use in gate drivers and motor controls.

Is the SOT26 package thermally enhanced compared to standard SOT23?

Yes-the SOT26 package features dual collector leads (C1 and C2) that serve as thermal conduction paths, lowering R_θJL to 74°C/W. This is significantly better than typical SOT23 packages (R_θJL ≈ 120–150°C/W), enabling higher power handling without added heatsinking in compact layouts.

Does ZXTD4591E6TA support PWM frequencies above 100kHz?

Yes-its f_T of 180MHz (NPN) and 150MHz (PNP), combined with low output capacitance (10pF), supports clean switching at PWM frequencies up to 500kHz in gate driver applications. Layout-dependent parasitics-not device limits-are the primary constraint above 200kHz.

ZXTD4591E6TA Specifications

Product attributes: Attribute value

Manufacturer:: Diodes Incorporated

Series:: -

Package/Case:: SOT-23-6

Packaging:: Tape & Reel (TR)

Product Status:: Active

Transistor Type:: 1 NPN, 1 PNP

Current - Collector (Ic) (Max):: 1A

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

Vce Saturation (Max) @ Ib, Ic:: 600mV @ 100mA, 1A / 500mV @ 100mA, 1A

Current - Collector Cutoff (Max):: 100nA

DC Current Gain (hFE) (Min) @ Ic, Vce:: 100 @ 500mA, 5V

Power - Max:: 1.1W

Frequency - Transition:: 150MHz

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

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: SOT-23-6

ZXTD4591E6TA FAQ

1.How can I place an order for ZXTD4591E6TA through Aetrix?

Please submit a Request for Quotation (RFQ) for ZXTD4591E6TA 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 ZXTD4591E6TA reliable?

The price and inventory of ZXTD4591E6TA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ZXTD4591E6TA is usually 5 days.

3.What payment methods are accepted for ZXTD4591E6TA?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ZXTD4591E6TA transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for ZXTD4591E6TA?

ZXTD4591E6TA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your ZXTD4591E6TA 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 ZXTD4591E6TA?

For technical support, including ZXTD4591E6TA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ZXTD4591E6TA requirements.

6.How does Aetrix verify that ZXTD4591E6TA is sourced from the original manufacturer or authorized distributors?

All ZXTD4591E6TA 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 ZXTD4591E6TA meets industry standards.

7.What is the process for return or replacement of ZXTD4591E6TA?

All ZXTD4591E6TA units undergo pre-shipment inspection (PSI). If there is an issue with ZXTD4591E6TA, 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 ZXTD4591E6TA part is unused and in its original packaging.

Return procedure for ZXTD4591E6TA:

1.Submit a request within 90 days.

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

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