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

Diodes Incorporated ZTX718

Name: ZTX718
Brand: Diodes Incorporated
SKU: ZTX718
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: ZTX718

Manufacturer:: Diodes Incorporated

Category:: Single Bipolar Transistors

Package:: E-Line-3

Datasheet:: ZTX718.pdf

Description:: TRANS PNP 20V 2.5A E-LINE

Quantity:: RFQ Add To RFQ list

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Inventory:2,820

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Product details

Overview

ZTX718 from Diodes Incorporated (formerly Zetex plc) is a PNP silicon planar medium-power high-gain bipolar junction transistor used as a power MOSFET gate driver in complementary pair configurations with ZTX618. It delivers 2.5A continuous collector current, -20V V_CEO, and h_FE ≥300 at I_C=−10mA, enabling robust switching in DC-DC converters and motor control stages.

For engineers reviewing the ZTX718 datasheet, ZTX718 pinout, ZTX718 application, or ZTX718 equivalent, key selection criteria include verified pulsed I_CM = −6A capability, V_CE(sat) ≤ −145mV at I_C=−1.5A/IB=−50mA, thermal resistance R_th(j-amb) = 116°C/W on 1 in² PCB copper, and guaranteed f_T ≥150MHz for fast-switching gate drive.

Technical Context

The ZTX718 operates as a medium-power PNP BJT with fixed-emitter configuration, optimized for linear and saturated switching modes. Its design supports high-current pulse handling (−6A, 300µs, ≤2% duty cycle) and low V_CE(sat) across I_C = −0.1A to −2.5A with corresponding base drive scaling.

It features a TO-92 compatible E-line package with emitter-base-collector (E-B-C) terminal order, rated for operation from −55°C to +200°C junction temperature, and exhibits stable h_FE down to −6A pulsed while maintaining V_BE(sat) ≤ −1.1V at I_C=−2.5A/IB=−200mA.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	−20 V: Maximum safe collector-emitter voltage before breakdown in common-emitter configuration.
I_C Cont	−2.5 A: Continuous DC collector current rating under 25°C ambient with 1 in² PCB copper heatsinking.
V_CE(sat)	−145 mV @ I_C=−1.5A/IB=−50mA: Low saturation voltage ensures minimal conduction loss in gate-drive and switching applications.
h_FE	≥300 @ I_C=−10mA/V_CE=−2V: High DC current gain enables efficient base drive current reduction in driver stages.
f_T	150 MHz @ I_C=−50mA/V_CE=−10V: Sufficient transition frequency for sub-100ns switching in MOSFET gate drivers.
R_th(j-amb)	116 °C/W: Thermal resistance with 1 in² PCB copper, defining maximum power dissipation derating above 25°C ambient.

Pinout & Package

Package: TO-92 compatible E-line (3-lead plastic), lead material: tin-plated copper, body dimensions per JEDEC TO-92 outline.

Pin/Terminal	Circuit Role	Design Meaning
E (Emitter)	Current source terminal in PNP operation	Connected to positive rail in high-side switch or gate-drive pull-up path; defines reference for base bias.
B (Base)	Control input for minority-carrier injection	Receives negative current to turn on; requires IB ≥ −200mA for full saturation at IC = −2.5A.
C (Collector)	Current sink terminal	Drives MOSFET gate capacitance or load; must withstand −20V reverse bias when off.

Key Features

Feature	Design Value
Peak pulse current	−6 A for 300 µs pulses (≤2% duty cycle), enabling short-duration surge handling in motor start or fault recovery.
Low V_CE(sat)	−130 mV typical at I_C=−1A/IB=−20mA, reducing conduction loss and self-heating during sustained switching.
High h_FE linearity	h_FE ≥150 up to I_C=−2A, supporting predictable base drive sizing without gain collapse in mid-current range.
Wide temperature range	Junction operation from −55°C to +200°C, suitable for under-hood automotive or industrial power modules.

Applications

DC-DC Converter Gate Driver

Motor Control H-Bridge

Use Scenario: Driving N-channel MOSFET gates in synchronous buck converters with complementary PNP/NPN pairs.

IC Role / Device Role: PNP switch providing active pull-up for high-side gate drive, paired with ZTX618 for push-pull action.

Use Value: V_CE(sat) ≤ −145 mV at −1.5A ensures <150 mW conduction loss, minimizing thermal stress in compact converter layouts.

Use Scenario: Level-shifting and current amplification in half-bridge gate driver IC interfaces.

IC Role / Device Role: Discrete PNP buffer stage translating logic-level signals to ±2.5A gate charge/discharge currents.

Use Value: f_T ≥150 MHz and t_on/t_off of 40/670 ns enable <100 ns total propagation delay for 100 kHz PWM control.

Industrial Power Supply

Automotive Body Controller

Use Scenario: Overcurrent protection latching circuits and auxiliary power sequencing in 24V industrial PSUs.

IC Role / Device Role: High-gain PNP sensing and latch transistor in crowbar or shutdown feedback paths.

Use Value: h_FE ≥300 at −10mA allows microampere-level sense current to trigger 2.5A output, improving sensitivity and noise immunity.

Use Scenario: Load switching for solenoids, relays, and LED arrays in vehicle body electronics modules.

IC Role / Device Role: Medium-power discrete switch replacing integrated high-side drivers where SOA or cost optimization is required.

Use Value: −20V V_CEO and −55°C to +200°C T_j rating meet ISO 16750-4 transient and thermal requirements for under-dash environments.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
ZTX750	V_CEO = −30V, I_C = −3A, R_th(j-amb) = 100°C/W, same TO-92 E-line pinout	Higher voltage margin and lower thermal resistance support 24V+ systems with tighter thermal budgets	Select when V_CEO > −20V or P_tot > 1W is required; verify h_FE curve match at target I_C.
MJD2955	TO-220 package, I_C = −10A, V_CEO = −60V, higher P_tot = 15W, different pinout (E-C-B)	Designed for higher-power linear regulators and audio output stages, not direct drop-in replacement	Choose only when board layout allows TO-220 footprint and thermal mass; requires PCB redesign and base drive recalculation.

Compared with ZTX750, ZTX718 offers tighter V_CE(sat) tolerance and better h_FE consistency below 2A, while MJD2955 provides superior SOA and thermal headroom at the cost of size and pin compatibility.

Availability

ZTX718 is available at Aetrix Electronics and suitable for DC-DC converter gate drivers, motor control H-bridges, industrial power supplies, and automotive body controllers requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for ZTX718 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 acquired Zetex plc in 2008 and maintains its legacy high-performance discrete portfolio, emphasizing reliability, wide temperature operation, and application-specific optimization for power management.

ZTX718 belongs to Zetex's medium-power bipolar transistor product line, designed specifically for high-gain, low-saturation switching in gate drive, load switching, and protection circuitry where TO-92 form factor and thermal efficiency are critical.

FAQ

What is the maximum safe operating voltage for ZTX718 in common-emitter configuration?

The absolute maximum collector-emitter voltage (V_CEO) is −20 V at T_j = 25°C. Operation beyond this rating risks avalanche breakdown and permanent device failure. Derating is required above 25°C ambient per the published derating curve, with full derating to zero at +125°C case temperature.

Can ZTX718 be used in parallel for higher current handling?

No - ZTX718 lacks built-in emitter ballasting resistors and exhibits positive thermal coefficient of V_BE(sat), making it unsuitable for parallel operation without external current-sharing resistors. Uneven current distribution may cause thermal runaway and premature failure in multi-device configurations.

Is ZTX718 RoHS compliant and halogen-free?

Yes - Diodes Incorporated certifies ZTX718 as RoHS 2011/65/EU compliant and halogen-free per IEC 61249-2-21. The TO-92 package uses matte tin-plated leads and meets JEDEC J-STD-020 moisture sensitivity level (MSL) 1 for unlimited floor life at ≤30°C/85% RH.

What is the recommended PCB layout for optimal thermal performance?

Mount ZTX718 on FR-4 PCB with ≥1 in² (645 mm²) copper area connected directly to the emitter pad via multiple thermal vias. Avoid solder mask over thermal copper. Minimum trace width for collector/emitter paths is 1.5 mm to limit resistive heating at 2.5A DC; base traces may be narrower but must maintain ≥0.3 mm clearance to adjacent nets.

ZTX718 Specifications

Product attributes: Attribute value

Manufacturer:: Diodes Incorporated

Series:: -

Package/Case:: E-Line-3

Packaging:: Bulk

Product Status:: Active

Transistor Type:: PNP

Current - Collector (Ic) (Max):: 2.5 A

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

Vce Saturation (Max) @ Ib, Ic:: 260mV @ 200mA, 2.5A

Current - Collector Cutoff (Max):: 100nA

DC Current Gain (hFE) (Min) @ Ic, Vce:: 150 @ 2A, 2V

Power - Max:: 1 W

Frequency - Transition:: 180MHz

Operating Temperature:: -55°C ~ 200°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: E-Line (TO-92 compatible)

ZTX718 FAQ

1.How can I place an order for ZTX718 through Aetrix?

Please submit a Request for Quotation (RFQ) for ZTX718 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 ZTX718 reliable?

The price and inventory of ZTX718 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ZTX718 is usually 5 days.

3.What payment methods are accepted for ZTX718?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ZTX718 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for ZTX718?

ZTX718 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your ZTX718 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 ZTX718?

For technical support, including ZTX718 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ZTX718 requirements.

6.How does Aetrix verify that ZTX718 is sourced from the original manufacturer or authorized distributors?

All ZTX718 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 ZTX718 meets industry standards.

7.What is the process for return or replacement of ZTX718?

All ZTX718 units undergo pre-shipment inspection (PSI). If there is an issue with ZTX718, 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 ZTX718 part is unused and in its original packaging.

Return procedure for ZTX718:

1.Submit a request within 90 days.

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

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