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Diodes Incorporated ZXTD618MCTA
- Part No.:
- ZXTD618MCTA
- Manufacturer:
- Diodes Incorporated
- Category:
- Bipolar Transistor Arrays
- Package:
- 8-WDFN Exposed Pad
- Datasheet:
-
ZXTD618MCTA.pdf
- Description:
- TRANS 2NPN 20V 5A W-DFN3020-8
- Quantity:
- Payment:
- Shipping:
Inventory:700
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Product details
Overview
ZXTD618MCTA from Diodes Incorporated is a dual NPN low-saturation switching transistor in a DFN3020B-8 package, rated for 20V VCEO, 4.5A continuous collector current per channel, and 150mV VCE(sat) @ 1A. It delivers 47mΩ equivalent on-resistance and supports high-current DC-DC converters and motor control circuits requiring compact, thermally efficient power switching.
For engineers reviewing the ZXTD618MCTA datasheet, ZXTD618MCTA pinout, ZXTD618MCTA application, or ZXTD618MCTA equivalent, key selection criteria include dual-channel saturation voltage matching, AEC-Q101 qualification for automotive-grade reliability, thermal resistance (RθJA = 51.0°C/W under short-pulse conditions), and footprint compatibility with DFN3020B-8 layout constraints.
Technical Context
This dual NPN transistor integrates two independent high-gain, low-VCE(sat) switching elements sharing a common DFN3020B-8 thermally enhanced leadframe. Each channel supports up to 6A hFE test condition and exhibits tight gain consistency across -55°C to +100°C operating range.
Its 0.8mm profile and 6mm² footprint enable thin portable designs, while RθJL = 17.1°C/W and split-exposed-collector pad design improve heat extraction versus SOT26. Pulse-rated ICM = 12A allows robust transient handling in charging and power-switching applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | 20V - Maximum safe collector-emitter blocking voltage in linear/switching operation |
| IC (cont.) | 4.5A per channel - Continuous current handling capacity at TA = 25°C with specified PCB copper coverage |
| VCE(sat) | 150mV @ 1A/10mA - Low conduction loss enabling high-efficiency power stage design |
| RSAT | 47mΩ - Equivalent on-resistance directly impacting I²R heating and thermal management |
| hFE | 200–450 @ IC = 10mA–6A - High and stable current gain across wide operating current range |
| RθJA | 51.0°C/W (t < 5 sec) - Thermal resistance enabling higher pulsed power density than SOT26 |
| AEC-Q101 | Qualified - Meets stress-test requirements for automotive under-hood and body electronics |
Pinout & Package
Package: DFN3020B-8, 0.8mm height, 3.0 × 2.0 mm body, exposed collector pads for thermal dissipation, NiPdAu pre-plated terminals.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 (B1) | Base of first NPN transistor | Control input for Channel 1; requires ~125mA base drive for full 4.5A saturation |
| Pin 2 (E1) | Emiter of first NPN transistor | Reference node for Channel 1; internally tied to exposed collector pad for thermal path |
| Pin 3 (C1) | Collector of first NPN transistor | High-current output node; connected to exposed pad for low-inductance, high-power routing |
| Pin 4 (C2) | Collector of second NPN transistor | Independent high-current output; shares thermal pad but electrically isolated from C1 |
| Pin 5 (E2) | Emiter of second NPN transistor | Reference node for Channel 2; separate from E1 to support independent emitter referencing |
| Pin 6 (B2) | Base of second NPN transistor | Control input for Channel 2; identical drive requirement as B1 |
| Pads 7 & 8 | Exposed collector thermal pads | Primary thermal interface; must be soldered to large copper pour for RθJA spec compliance |
Key Features
| Feature | Design Value |
|---|---|
| Dual NPN integration | Reduces PCB area by 50% vs. two discrete SOT26 transistors while maintaining independent control |
| Low VCE(sat) | 150mV @ 1A enables <150mW conduction loss per channel, critical for battery-powered efficiency |
| AEC-Q101 qualification | Validated for automotive temperature cycling, humidity, and mechanical shock per JESD22 standards |
| Thermal performance | RθJA = 51.0°C/W (short pulse) supports >2× power density vs. legacy SOT26 in same board area |
| Green packaging | Lead-free, halogen-free, antimony-free construction compliant with RoHS and Diodes Inc's "Green" policy |
Applications
| DC-DC Converters | Charging Circuits |
|---|---|
Use Scenario: Synchronous buck converter in USB-C PD power banks with 5–20V input and 3–12V output. IC Role / Device Role / Timing Role: Low-side switch in dual-phase topology, operating at 500kHz with 10ns–400ns switching transitions. Use Value: 150mV VCE(sat) reduces conduction loss by 35% vs. comparable SOT26 devices, improving full-load efficiency by ≥1.2%. | Use Scenario: Li-ion fast-charging path control in portable medical monitors with dual-cell 8.4V battery packs. IC Role / Device Role / Timing Role: Reverse-polarity and overcurrent protection switch, driven by MCU GPIO with 100ns turn-on response. Use Value: 47mΩ RSAT limits voltage drop to <210mV at 4.5A, preserving >97% of input voltage for charge management ICs. |
| Motor Control | Portable Power Switches |
Use Scenario: H-bridge driver for 12V brushed DC motors in handheld power tools with PWM duty cycles down to 5%. IC Role / Device Role / Timing Role: High-current quadrant switch with simultaneous dual-channel drive for bidirectional torque control. Use Value: Dual-channel thermal isolation prevents cross-talk-induced thermal runaway; RθJL = 17.1°C/W ensures junction stays <125°C at 4.5A continuous. | Use Scenario: Main system power switch in ruggedized industrial tablets with 18–32V input and hot-swap capability. IC Role / Device Role / Timing Role: Load switch enabling controlled inrush limiting and fault-isolated shutdown via base drive sequencing. Use Value: 20V VCEO and 12A ICM support 30V surge tolerance; 0.8mm profile fits within 1.2mm total stack-up height constraints. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual NPN switching transistor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| DMN3028LSD-13 | Single-channel 30V/6.5A MOSFET in SO-8; no integrated dual topology or AEC-Q101 rating | Requires two devices and external gate drivers; lacks thermal pad integration | Choose only if higher VDS margin or logic-level drive is required; not drop-in compatible |
| ZXTD617MCTA | Same DFN3020B-8 package, but 15V VCEO and 3.5A IC; lower VCE(sat) (120mV @ 1A) | Not suitable for 20V bus applications; limited to ≤15V systems like 12V automotive accessories | Select when lower saturation voltage is prioritized over voltage rating and current capacity |
Compared with ZXTD618MCTA, DMN3028LSD-13 offers higher voltage rating but adds component count and complexity, while ZXTD617MCTA trades voltage/current headroom for slightly better conduction loss-making ZXTD618MCTA optimal for 20V, 4.5A dual-switching applications demanding AEC-Q101 reliability and minimal footprint.
Availability
ZXTD618MCTA is available at Aetrix Electronics and suitable for DC-DC converters, motor control modules, and portable power switches requiring stable component supply, automotive-grade qualification, and thermal-efficient dual-transistor integration.
Supply support for ZXTD618MCTA 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 power management, signal integrity, and protection solutions.
ZXTD618MCTA belongs to Diodes' ZXT series of high-performance bipolar transistors engineered for space-constrained, thermally demanding power switching applications in automotive, industrial, and portable electronics.
FAQ
What is the maximum continuous collector current per channel for ZXTD618MCTA?
The ZXTD618MCTA supports 4.5A continuous collector current per channel when mounted on a 28mm × 28mm FR4 PCB with 2 oz copper and operated at TA = 25°C. This rating assumes one active die; simultaneous dual-channel operation reduces per-channel current capability due to thermal coupling, as specified in Note 8 of the datasheet (RθJA = 73.5°C/W).
Does ZXTD618MCTA require external base resistors for standard MCU GPIO drive?
Yes. Driving ZXTD618MCTA's base with a typical 3.3V or 5V MCU GPIO requires an external series resistor to limit base current. For 4.5A collector current, ~125mA base drive is needed (IC/IB ≈ 36). A 22Ω resistor with 5V drive yields ~136mA IB, ensuring full saturation while staying within GPIO current limits and preventing excessive power dissipation in the base resistor.
How does the DFN3020B-8 package improve thermal performance over SOT26?
The DFN3020B-8 package achieves 40% lower RθJA than SOT26 by integrating dual exposed collector pads that connect directly to internal copper planes. Its 0.8mm height and optimized leadframe geometry reduce thermal resistance from junction to ambient (51.0°C/W vs. ~85°C/W for SOT26 under identical test conditions), enabling higher power density without forced airflow or additional heatsinking.
Is ZXTD618MCTA suitable for automotive infotainment power supplies?
Yes. ZXTD618MCTA is AEC-Q101 qualified and rated for operation from -55°C to +150°C junction temperature. Its 20V VCEO, 4.5A current capability, and low 150mV VCE(sat) make it appropriate for 12V automotive power rails in infotainment DC-DC stages, provided PCB layout follows Diodes' recommended pad dimensions and thermal copper guidelines in DS31931.
ZXTD618MCTA 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 NPN (Dual)
- Current - Collector (Ic) (Max):
- 5A
- Voltage - Collector Emitter Breakdown (Max):
- 20V
- Vce Saturation (Max) @ Ib, Ic:
- 300mV @ 125mA, 4.5A
- Current - Collector Cutoff (Max):
- 100nA
- DC Current Gain (hFE) (Min) @ Ic, Vce:
- 300 @ 200mA, 2V
- Power - Max:
- 1.7W
- Frequency - Transition:
- 100MHz
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- W-DFN3020-8
ZXTD618MCTA FAQ
1.How can I place an order for ZXTD618MCTA through Aetrix?
Please submit a Request for Quotation (RFQ) for ZXTD618MCTA 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 ZXTD618MCTA reliable?
The price and inventory of ZXTD618MCTA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ZXTD618MCTA is usually 5 days.
3.What payment methods are accepted for ZXTD618MCTA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ZXTD618MCTA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ZXTD618MCTA?
ZXTD618MCTA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ZXTD618MCTA 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 ZXTD618MCTA?
For technical support, including ZXTD618MCTA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ZXTD618MCTA requirements.
6.How does Aetrix verify that ZXTD618MCTA is sourced from the original manufacturer or authorized distributors?
All ZXTD618MCTA 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 ZXTD618MCTA meets industry standards.
7.What is the process for return or replacement of ZXTD618MCTA?
All ZXTD618MCTA units undergo pre-shipment inspection (PSI). If there is an issue with ZXTD618MCTA, 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 ZXTD618MCTA part is unused and in its original packaging.
Return procedure for ZXTD618MCTA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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