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Diodes Incorporated ZXTD718MCTA
- Part No.:
- ZXTD718MCTA
- Manufacturer:
- Diodes Incorporated
- Category:
- Bipolar Transistor Arrays
- Package:
- 8-WDFN Exposed Pad
- Datasheet:
-
ZXTD718MCTA.pdf
- Description:
- TRANS 2PNP 20V 3.5A W-DFN3020-8
- Quantity:
- Payment:
- Shipping:
Inventory:4,417
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Product details
Overview
ZXTD718MCTA from Diodes Incorporated is a dual PNP low-saturation switching transistor in DFN3020B-8 package, rated for -20V VCEO, -3.5A continuous collector current per channel, and -220mV VCE(sat) @ -1A/-20mA. It delivers 64 mΩ equivalent on-resistance and supports high-reliability automotive applications per AEC-Q101.
For engineers reviewing the ZXTD718MCTA datasheet, ZXTD718MCTA pinout, ZXTD718MCTA application, or ZXTD718MCTA equivalent, key selection criteria include dual-channel PNP switching capability, thermal resistance (RθJA = 83.3°C/W on 8 cm² 2 oz Cu), low-profile 0.8 mm height, and AEC-Q101 qualification for battery management and motor drive systems.
Technical Context
This dual PNP transistor integrates two independent high-gain, low-VCE(sat) switching elements in a single DFN3020B-8 package with exposed collector pads for enhanced thermal performance. Each channel supports pulsed IC up to -6A and maintains hFE ≥ 15 at -6A, enabling robust current handling in compact DC-DC and load-switching topologies.
Its design targets space-constrained portable and automotive power stages where footprint reduction (6 mm²) and thermal efficiency (40% lower RθJA vs. SOT26) are critical. The pre-plated NiPdAu terminals ensure solderability per MIL-STD-202, Method 208, and moisture sensitivity level is rated at J-STD-020 Level 1.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | -20 V - Maximum safe collector-emitter voltage under open-base conditions; defines blocking capability in high-side switch configurations. |
| IC (cont.) | -3.5 A - Continuous current per channel; enables direct driving of medium-power loads like LED strings or small motors without external heatsinking. |
| VCE(sat) | -220 mV @ -1A/-20mA - Low saturation voltage minimizes conduction loss and self-heating in battery-powered load disconnect circuits. |
| RθJA | 83.3 °C/W - Thermal resistance on 8 cm² 2 oz Cu PCB; allows 1.5 W dissipation at TA = 25°C before reaching TJ(max) = 150°C. |
| hFE | 15–475 - Current gain range across IC = -10mA to -6A; ensures stable base drive design across wide load-current operating points. |
| Package | DFN3020B-8 - 3.0 × 2.0 mm, 0.8 mm height, dual-exposed-collector thermal pad; supports automated assembly and high-density layout. |
Pinout & Package
DFN3020B-8 is a thermally enhanced 8-pin dual-flat no-lead package with two exposed collector pads (C1 and C2) on the bottom surface. Pin 1 is marked by a dot on the top surface; leads are pre-plated NiPdAu for reliable solder wetting.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| C1 | Collector of Channel 1 | Primary current sink node for first PNP; connected to internal die and exposed thermal pad for heat dissipation. |
| E1 | Emitter of Channel 1 | High-side output terminal for Channel 1; referenced to system supply rail in load-switch applications. |
| B1 | Base of Channel 1 | Current-controlled input for Channel 1; requires ~20 mA base drive to saturate at 1 A collector current. |
| C2 | Collector of Channel 2 | Independent current sink node for second PNP; electrically isolated from C1 but shares thermal path via common pad. |
| E2 | Emitter of Channel 2 | Second high-side output; enables dual independent switching functions (e.g., dual-phase buck sync rectification). |
| B2 | Base of Channel 2 | Separate control input for Channel 2; allows asynchronous or complementary gate drive without cross-talk. |
Key Features
| Feature | Design Value |
|---|---|
| Dual PNP topology | Reduces board area by 50% vs. TSOP6/SOT26 equivalents while maintaining independent channel control and isolation. |
| AEC-Q101 qualification | Validated for automotive-grade reliability including temperature cycling (-55°C to +150°C), humidity, and mechanical shock. |
| Low-profile 0.8 mm height | Enables use in ultra-thin portable devices such as smartphones and wearables where Z-axis clearance is constrained. |
| RθJA = 83.3°C/W | 40% lower than comparable SOT26 packages, permitting higher power density without forced air or external heatsinks. |
Applications
| Battery Charging Circuits | Load Disconnect Switches |
|---|---|
Use Scenario: Bidirectional charging control in USB-C PD power banks with dual-cell Li-ion stacks. IC Role / Device Role / Timing Role: Dual high-side PNP switch managing charge path direction and reverse-current blocking during source/sink transitions. Use Value: -220 mV VCE(sat) minimizes voltage drop across each channel, preserving charging efficiency and reducing thermal stress during 2A–3A charge currents. | Use Scenario: Isolation of auxiliary subsystems (e.g., infotainment, ADAS sensors) during vehicle ignition-off sleep mode. IC Role / Device Role / Timing Role: Dual-channel load switch providing independent enable control for two power domains with fast turn-off (<670 ns). Use Value: Dual-exposed-collector thermal design sustains -3.5A per channel without derating, ensuring reliable disconnection under full-load fault conditions. |
| DC-DC Converters | Motor Drive |
Use Scenario: Synchronous rectification in 12V-to-3.3V buck converters for automotive body electronics. IC Role / Device Role / Timing Role: Dual PNP used as low-side synchronous rectifiers replacing Schottky diodes in discrete buck stages. Use Value: 64 mΩ equivalent on-resistance reduces conduction loss by >40% vs. 0.5V-drop Schottky, improving converter efficiency at light-to-moderate loads. | Use Scenario: H-bridge half-bridge driver for brushed DC motors in automotive seat adjusters or HVAC actuators. IC Role / Device Role / Timing Role: High-side PNP switch controlling motor voltage rail; paired with N-channel MOSFETs for complementary drive. Use Value: -20V VCEO rating safely handles 12V automotive transients (ISO 7637-2 Pulse 1/2a), preventing latch-up during load dump events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual PNP switching transistor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ZXTD718E6TA | Same die, SOT-26 package; RθJA = 139°C/W; 2.5× larger footprint (15 mm²); no exposed thermal pad. | Suitable for non-automotive, cost-sensitive designs where thermal performance and board area are less critical. | Select when legacy SOT-26 footprint compatibility is required and thermal margin exceeds 1.2 W. |
| DMT3006LPSQ-13 | Dual PNP in PowerDI5060; VCEO = -30V; IC = -4A; RθJA = 62°C/W; AEC-Q101 qualified; larger 5.0 × 6.0 mm package. | Better suited for higher-voltage industrial motor drives requiring >-20V blocking and higher thermal headroom. | Choose when VCEO > -25V or >2 W continuous dissipation is needed, accepting larger board area. |
Compared with ZXTD718E6TA and DMT3006LPSQ-13, ZXTD718MCTA uniquely balances AEC-Q101 compliance, ultra-compact 6 mm² footprint, and optimized thermal resistance for space-limited automotive power switches-making it preferred for next-gen battery management and ECU sub-systems where Z-height and thermal density are constrained.
Availability
ZXTD718MCTA is available at Aetrix Electronics and suitable for battery charging circuits, load disconnect switches, and DC-DC converters requiring stable component supply, automotive-grade reliability, and high thermal efficiency in minimal board area.
Supply support for ZXTD718MCTA 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-performance, high-reliability components for automotive, industrial, and consumer markets.
ZXTD718MCTA belongs to Diodes' ZXT series of low-saturation bipolar transistors, engineered specifically for high-efficiency power switching in space- and thermal-constrained automotive and portable applications.
FAQ
What is the maximum junction temperature and how does it affect continuous operation?
The ZXTD718MCTA has a maximum junction temperature (TJ) of +150°C. With RθJA = 83.3°C/W on an 8 cm² 2 oz Cu PCB, continuous power dissipation must be limited to 1.5 W at 25°C ambient to stay within this limit. Derating is linear at 12 mW/°C above 25°C, requiring thermal design review for operation above 70°C ambient.
Is ZXTD718MCTA pin-compatible with other dual-transistor packages like SOT-26 or SO-8?
No, ZXTD718MCTA uses the DFN3020B-8 footprint (3.0 × 2.0 mm), which is not mechanically or electrically pin-compatible with SOT-26 (6-pin) or SO-8 (8-pin). Its pinout (C1/E1/B1/C2/E2/B2) and dual-exposed-collector layout require dedicated PCB layout; migration from SOT-26 requires redesign of pad geometry and thermal relief.
How does the hFE variation across current range impact base drive design?
hFE drops from 475 at -10 mA to 15 at -6 A, so base drive must scale with load current. For -3.5 A operation, minimum IB = 233 mA is required assuming hFE = 15. Designers should verify VBE(sat) = -1.01 V at this condition and ensure driver can source ≥350 mA peak to maintain saturation under worst-case gain.
Can ZXTD718MCTA be used in linear regulation or only switching applications?
ZXTD718MCTA is characterized and qualified for switching operation-not linear regulation. Its Safe Operating Area (SOA) graph shows limited DC capability (≤1.13 W with both dies active), and VCE(sat) is specified only under pulsed conditions (≤300 µs, ≤2% duty cycle). Linear use risks thermal runaway due to negative temperature coefficient of VCE(sat) and insufficient SOA margin.
ZXTD718MCTA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- 8-WDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Transistor Type:
- 2 PNP (Dual)
- Current - Collector (Ic) (Max):
- 3.5A
- Voltage - Collector Emitter Breakdown (Max):
- 20V
- Vce Saturation (Max) @ Ib, Ic:
- 300mV @ 350mA, 3.5A
- Current - Collector Cutoff (Max):
- 100nA
- DC Current Gain (hFE) (Min) @ Ic, Vce:
- 300 @ 100mA, 2V
- Power - Max:
- 1.7W
- Frequency - Transition:
- 150MHz
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- W-DFN3020-8
ZXTD718MCTA FAQ
1.How can I place an order for ZXTD718MCTA through Aetrix?
Please submit a Request for Quotation (RFQ) for ZXTD718MCTA 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 ZXTD718MCTA reliable?
The price and inventory of ZXTD718MCTA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ZXTD718MCTA is usually 5 days.
3.What payment methods are accepted for ZXTD718MCTA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ZXTD718MCTA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ZXTD718MCTA?
ZXTD718MCTA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ZXTD718MCTA 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 ZXTD718MCTA?
For technical support, including ZXTD718MCTA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ZXTD718MCTA requirements.
6.How does Aetrix verify that ZXTD718MCTA is sourced from the original manufacturer or authorized distributors?
All ZXTD718MCTA 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 ZXTD718MCTA meets industry standards.
7.What is the process for return or replacement of ZXTD718MCTA?
All ZXTD718MCTA units undergo pre-shipment inspection (PSI). If there is an issue with ZXTD718MCTA, 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 ZXTD718MCTA part is unused and in its original packaging.
Return procedure for ZXTD718MCTA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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