ZXTD718MCTA

Overview

The ZXTD718MCTA is a dual PNP low saturation switching transistor manufactured by Diodes Incorporated. It features a collector-emitter breakdown voltage (BVCEO) of -20V and a continuous collector current (IC) of -3.5A. The device exhibits a low saturation voltage of -220mV at -1A and an equivalent on-resistance (RSAT) of 64 mΩ. Static forward current transfer ratio (hFE) is characterized up to -6A, ensuring high gain under heavy loads. Transition frequency (fT) reaches 180 MHz at -50mA. Power dissipation is rated at 1.5W with a thermal resistance (RθJA) of 83.3°C/W on standard FR4 PCBs. Operating temperature range spans from -55°C to +150°C.

Feature Summary

• Dual NPN configuration designed to save footprint and component count
• Low profile 0.8mm package suitable for thin applications
• Efficient thermal resistance, 40% lower than SOT26
• Qualified to AEC-Q101 standards for high reliability

Applications

• Battery charging circuits
• Load disconnect switches
• DC-DC converters
• Motor drive
• LED backlighting circuits

Procurement Notes

Verify the specific ordering suffix against official manufacturer documentation before procurement. Confirm that the requested part number matches the exact electrical characteristics and packaging requirements defined in the datasheet. Ensure compliance with RoHS and halogen-free specifications if required by the application environment. Cross-reference the manufacturer's latest revision notes to confirm component availability and any potential design changes.

Selection Notes

Select this component when space constraints require a compact dual PNP solution with low saturation voltage. Evaluate thermal performance based on the specific PCB copper area and layer configuration, as thermal resistance varies significantly with board layout. Consider the transition frequency and hFE characteristics for high-speed switching or high-current load management applications where low power loss is critical.

Part Context

The ZXTD718MC series belongs to Diodes Incorporated's portfolio of dual bipolar junction transistors optimized for low saturation and high current handling. The ZXTD718MCTA variant specifically utilizes the DFN3020B-8 package, offering a 6mm² footprint that is 50% smaller than TSOP6 and SOT26 packages. This series is engineered for portable electronics and power management systems requiring efficient switching capabilities within a minimal physical envelope.

Replacement Considerations

Direct pin-compatible replacements should be verified through official manufacturer substitution lists. Ensure alternative components match the -20V BVCEO, -3.5A IC rating, and DFN3020B-8 package dimensions. Thermal resistance and saturation voltage characteristics must be comparable to maintain circuit performance and reliability.

FAQ

What is the maximum collector-base voltage for the ZXTD718MCTA?

The maximum collector-base voltage (VCBO) is -25V.

How does the thermal resistance of the ZXTD718MCTA compare to SOT26?

The thermal resistance is approximately 40% lower than that of an SOT26 package due to its efficient heat dissipation design in the DFN3020B-8 case.

Is the ZXTD718MCTA qualified for automotive applications?

Yes, the device is qualified to AEC-Q101 standards for high reliability.