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

Diodes Incorporated ZXTN19055DZTA

Name: ZXTN19055DZTA
Brand: Diodes Incorporated
SKU: ZXTN19055DZTA
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: ZXTN19055DZTA

Manufacturer:: Diodes Incorporated

Category:: Single Bipolar Transistors

Package:: TO-243AA

Datasheet:: ZXTN19055DZTA.pdf

Description:: TRANS NPN 55V 6A SOT-89-3

Quantity:: RFQ Add To RFQ list

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Inventory:1,173

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Product details

Overview

ZXTN19055DZTA from Diodes Incorporated is a 55V V_CEO, 6A continuous NPN medium-power bipolar junction transistor in SOT89 package, featuring 40mV V_CE(sat) at 500mA/50mA drive and 28mΩ equivalent on-resistance-optimized for high-current switching in DC motor drivers and solenoid control circuits.

For engineers reviewing the ZXTN19055DZTA datasheet, ZXTN19055DZTA pinout, ZXTN19055DZTA application, or ZXTN19055DZTA equivalent, key selection criteria include verified 55V blocking capability, low saturation voltage under 6A load, thermal resistance of 59°C/W on 50mm² copper, and AEC-Q101 readiness for automotive-grade reliability validation.

Technical Context

This NPN transistor operates as a medium-power switch with forward-blocking capability up to 150V (V_CEX) and emitter-base breakdown of 7V. Its gain profile delivers h_FE = 250 at 10mA and remains ≥180 at 2A, supporting stable current amplification across industrial load ranges.

Designed for pulsed and DC switching, it exhibits f_T = 140MHz typical, enabling fast turn-on/turn-off transitions (t_d = 13.8ns, t_r = 21.9ns), while C_obo = 21.2pF minimizes capacitive loading in high-frequency drive stages.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	55V - Maximum safe collector-emitter voltage under active switching conditions
I_C (continuous)	6A - Sustained current handling without thermal derating on 50mm² copper PCB
V_CE(sat)	40mV @ 0.5A/50mA - Enables <0.02W conduction loss at mid-load, reducing heatsink requirements
R_sat	28mΩ - Low equivalent on-resistance supports efficient power delivery in DC modules
P_D	2.1W - Power dissipation rating with 59°C/W thermal resistance on optimized PCB layout
f_T	140MHz - Supports fast-switching applications including backlight inverters and PWM motor control
h_FE	250 @ 10mA - Ensures reliable base drive margin for digital logic-level interface compatibility

Pinout & Package

Package: SOT89 - Surface-mount plastic case with integrated heat slug (pin 2 connected to collector tab), UL 94V-0 rated, 0.05g weight, moisture sensitivity level 1.

Pin/Terminal	Circuit Role	Design Meaning
1 (Emitter)	E	Current return path; electrically isolated from heat slug for floating emitter configurations
2 (Collector)	C	Main power output node; internally bonded to exposed metal tab for direct thermal coupling to PCB copper
3 (Base)	B	Control input; requires 50–600mA drive current depending on load, with V_BE(sat) ≤ 1.15V

Key Features

Feature	Design Value
Low V_CE(sat)	40mV at 0.5A enables <20mW conduction loss-critical for thermally constrained emergency lighting designs
High I_C rating	6A continuous current supports direct driving of 12V/24V DC fans and small solenoids without external driver stages
Robust voltage blocking	150V V_CBO and V_CEX allow operation in inductive load circuits with >100V flyback transients
AEC-Q101 readiness	Manufactured in IATF 16949 facilities with PPAP capability-supports automotive solenoid and actuator qualification paths
Green construction	Halogen- and antimony-free, RoHS 3 compliant (Br+Cl <1500ppm, Sb <1000ppm) for eco-sensitive industrial deployments

Applications

DC Motor Control

Solenoid & Relay Drivers

Use Scenario: Driving 12V/24V brushed DC motors in HVAC actuators and industrial positioning systems.

IC Role / Device Role / Timing Role: High-current NPN switch controlling motor direction and speed via PWM base drive.

Use Value: 6A I_C and 28mΩ R_sat minimize resistive heating during sustained 100% duty cycle operation.

Use Scenario: Energizing 24V solenoid valves in fluid control panels and automated manufacturing equipment.

IC Role / Device Role / Timing Role: Fast-turn-on switch delivering peak coil current with minimal delay (t_d = 13.8ns).

Use Value: 150V V_CEX safely clamps inductive kickback without external snubbers.

Emergency Lighting Circuits

Backlight Inverters

Use Scenario: Battery-backed LED driver stage in exit sign and egress lighting systems.

IC Role / Device Role / Timing Role: Constant-current switch regulating LED string current during mains failure.

Use Value: 40mV V_CE(sat) preserves battery runtime by limiting conduction losses below 20mW per switch.

Use Scenario: High-frequency switching element in CCFL backlight inverters for industrial displays.

IC Role / Device Role / Timing Role: RF-capable transistor operating at 50–100kHz with f_T = 140MHz.

Use Value: 21.2pF C_obo reduces reactive loading on resonant tank, improving inverter efficiency and EMI profile.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
ZXTN2005ZTA	V_CEO = 60V, I_C = 5A, V_CE(sat) = 55mV @ 0.5A	Lower current rating and higher saturation voltage reduce efficiency in 6A motor drives	Select when 60V margin is prioritized over conduction loss in lower-power solenoid circuits
MJD127G	V_CEO = 100V, I_C = 2A, SOT-223 package, R_θJA = 62°C/W	Higher voltage rating but halved current capacity and inferior thermal performance on same PCB area	Prefer for 100V flyback-tolerant designs where board space allows larger SOT-223 footprint

Compared with ZXTN2005ZTA and MJD127G, ZXTN19055DZTA delivers superior 6A current handling and lowest V_CE(sat) in SOT89, making it optimal for thermally dense DC fan and actuator modules requiring minimal heatsinking.

Availability

ZXTN19055DZTA is available at Aetrix Electronics and suitable for emergency lighting circuits, DC motor driving, and solenoid/relay control applications requiring stable component supply and automotive-grade traceability.

Supply support for ZXTN19055DZTA 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.

ZXTN19055DZTA belongs to Diodes' ZXTN series of medium-power bipolar transistors engineered specifically for high-current, low-saturation switching in automotive, industrial, and consumer power management systems.

FAQ

What is the maximum allowable junction temperature for ZXTN19055DZTA?

The device supports an operating junction temperature range of –55°C to +150°C. At maximum ambient temperature (+125°C), the 59°C/W thermal resistance on 50mm² copper allows up to 425mW of power dissipation before reaching T_J(max), assuming no additional heatsinking.

Can ZXTN19055DZTA be used in linear amplifier applications?

No-it is optimized for switching operation, not linear amplification. Its h_FE variation across current (250 at 10mA, 180 at 2A) and lack of specified linearity parameters make it unsuitable for analog signal amplification; use dedicated RF or audio transistors instead.

Is ZXTN19055DZTA qualified to AEC-Q101?

While manufactured in IATF 16949-certified facilities and PPAP-capable, official AEC-Q101 qualification status must be confirmed per batch via Diodes' automotive product documentation; standard ZXTN19055DZTA is not pre-certified but supports qualification pathways.

What is the recommended PCB pad layout for thermal performance?

Use the SOT89 footprint with ≥50mm² of 1oz copper connected directly to pin 2 (collector/tab). The datasheet specifies 50mm × 50mm copper area for the 2.1W/59°C/W rating; smaller pads increase thermal resistance proportionally-e.g., 25mm² raises R_θJA to 83°C/W.

ZXTN19055DZTA 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):: 55 V

Vce Saturation (Max) @ Ib, Ic:: 250mV @ 600mA, 6A

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

DC Current Gain (hFE) (Min) @ Ic, Vce:: 250 @ 10mA, 2V

Power - Max:: 2.1 W

Frequency - Transition:: 200MHz

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

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: SOT-89-3

ZXTN19055DZTA FAQ

1.How can I place an order for ZXTN19055DZTA through Aetrix?

Please submit a Request for Quotation (RFQ) for ZXTN19055DZTA 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 ZXTN19055DZTA reliable?

The price and inventory of ZXTN19055DZTA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ZXTN19055DZTA is usually 5 days.

3.What payment methods are accepted for ZXTN19055DZTA?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ZXTN19055DZTA transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for ZXTN19055DZTA?

ZXTN19055DZTA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your ZXTN19055DZTA 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 ZXTN19055DZTA?

For technical support, including ZXTN19055DZTA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ZXTN19055DZTA requirements.

6.How does Aetrix verify that ZXTN19055DZTA is sourced from the original manufacturer or authorized distributors?

All ZXTN19055DZTA 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 ZXTN19055DZTA meets industry standards.

7.What is the process for return or replacement of ZXTN19055DZTA?

All ZXTN19055DZTA units undergo pre-shipment inspection (PSI). If there is an issue with ZXTN19055DZTA, 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 ZXTN19055DZTA part is unused and in its original packaging.

Return procedure for ZXTN19055DZTA:

1.Submit a request within 90 days.

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

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