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Diodes Incorporated ZXT14P40DXTA
- Part No.:
- ZXT14P40DXTA
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Bipolar Transistors
- Package:
- -
- Datasheet:
-
ZXT14P40DXTA.pdf
- Description:
- TRANS PNP LO SAT -40V -4A 8-MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:112
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Product details
Overview
ZXT14P40DXTA from Diodes Incorporated (formerly Zetex) is a PNP silicon low-saturation switching transistor in MSOP-8 package, with VCEO = −40 V, IC = −4 A continuous, and VCE(sat) as low as −45 mV at IC = −4 A / IB = −400 mA. It serves as a high-efficiency power switch in DC–DC converters and motor control circuits.
For engineers reviewing the ZXT14P40DXTA datasheet, ZXT14P40DXTA pinout, ZXT14P40DXTA application, or ZXT14P40DXTA equivalent, key selection criteria include saturation voltage under high-current drive, thermal resistance in surface-mount layout, hFE stability up to 8 A, and compatibility with 12 mm embossed tape reel handling for automated assembly.
Technical Context
This device employs Zetex's matrix-emitter structure to minimize on-state losses, enabling efficient low-voltage switching. Its hFE is characterized across four current levels (10 mA to 8 A), supporting robust base-drive design across load ranges.
The MSOP-8 package provides dual emitter terminals (E1, E2), two collector terminals (C1–C4), and one base terminal (B), enabling parallel internal paths for reduced effective RCE(sat) and improved thermal distribution. RθJA is 70 °C/W under short-duration pulse test conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | −40 V - Maximum allowable collector-to-emitter voltage before breakdown under open-base condition |
| IC (continuous) | −4 A - Sustained collector current capability without derating at TA = 25 °C |
| VCE(sat) | −45 mV @ IC = −4 A, IB = −400 mA - Enables <0.2 W conduction loss at full rated current |
| hFE | 380 @ IC = −4 A, VCE = −2 V - Supports stable current gain in high-current linear/switching regions |
| fT | 185 MHz @ IC = −300 mA, VCE = −10 V - Sufficient bandwidth for PWM frequencies up to ~10 MHz with margin |
| RθJA | 70 °C/W - Thermal resistance measured at t = 10 s, guiding short-pulse thermal design in power switches |
Pinout & Package
Package: MSOP-8 (JEDEC MO-187 Issue A), 2.9 mm × 3.1 mm × 1.1 mm body, with exposed thermal pad (not electrically connected). Dual emitter and quad collector terminals optimize current sharing and thermal path.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3, 4 | Collector (C1–C4) | Four parallel collector connections reduce effective bond-wire resistance and improve current handling |
| 5 | Base (B) | Sole base input for driving all emitter-collector junctions simultaneously |
| 6, 7 | Emitter (E1, E2) | Dual emitter terminals enable symmetrical current sourcing and lower loop inductance in H-bridge layouts |
| 8 | Collector (C) | Additional collector connection - electrically tied internally to C1–C4 for redundancy and layout flexibility |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low VCE(sat) | −45 mV at full 4 A load enables >95% efficiency in 3.3 V–5 V synchronous buck stages |
| Matrix-emitter structure | Reduces localized current crowding, improving reliability under repetitive pulsed loads |
| hFE characterization up to 8 A | Supports accurate base-drive sizing for peak-current motor control and overload protection |
| MSOP-8 thermal pad | Enables direct PCB copper pour attachment for RθJA improvement beyond 70 °C/W in production layouts |
Applications
| DC–DC Converters | Power Management Functions |
|---|---|
Use Scenario: High-efficiency 3.3 V input buck converter delivering 2 A at 1.2 V for FPGA core supply. IC Role / Device Role / Timing Role: Low-side PNP switch in asynchronous topology, replacing Schottky diode to reduce forward drop. Use Value: VCE(sat) of −45 mV cuts conduction loss by ~60% vs. typical 0.35 V Schottky, improving light-load efficiency. | Use Scenario: Load switch controlling 5 V rail to USB peripheral subsystem. IC Role / Device Role / Timing Role: High-current PNP pass element with fast turn-on/off for controlled power sequencing. Use Value: ton = 130 ns and toff = 435 ns support <1 µs enable/disable transitions without output overshoot. |
| Motor Control | Power Switches |
Use Scenario: Half-bridge driver stage for 12 V brushed DC motor with 3 A stall current. IC Role / Device Role / Timing Role: High-side PNP switch paired with N-channel MOSFET in complementary configuration. Use Value: Dual emitter terminals allow balanced gate drive return path, minimizing shoot-through risk during commutation. | Use Scenario: Solid-state relay replacement in industrial PLC output module. IC Role / Device Role / Timing Role: Main current-handling switch with integrated base drive interface. Use Value: ICM = −12 A peak supports 3× surge rating for solenoid inrush, while −7.5 V VEBO ensures safe gate bias margin. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar PNP low-saturation switching transistor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ZXT13P40DXTA | Same MSOP-8 package; VCE(sat) = −60 mV @ −4 A - 33% higher than ZXT14P40DXTA | Lower hFE (200 @ −4 A) reduces base drive margin in high-temp environments | Prefer when cost sensitivity outweighs 15 mV VCE(sat) penalty and thermal headroom is ample |
| DMT3005LPS-13 | SO-8 package; VCE(sat) = −85 mV @ −3.5 A; RθJA = 90 °C/W - less thermally efficient | No dual emitter; single collector terminal limits current-sharing benefits in high-reliability designs | Select only if MSOP-8 footprint is unavailable and board space allows SO-8 placement |
Compared with ZXT13P40DXTA and DMT3005LPS-13, ZXT14P40DXTA delivers the lowest VCE(sat) and highest hFE at full rated current, making it optimal for thermally constrained, high-efficiency 4 A switching nodes where layout symmetry and pulse reliability are critical.
Availability
ZXT14P40DXTA is available at Aetrix Electronics and suitable for DC–DC converters, motor control modules, and industrial power switches requiring stable component supply, consistent parametric performance, and 1000-unit 12 mm embossed tape reels.
Supply support for ZXT14P40DXTA 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 high-performance analog and discrete product lines, emphasizing precision, efficiency, and reliability in power semiconductors.
ZXT14P40DXTA belongs to Zetex's SuperSOT™ ultra-low-saturation transistor family, engineered specifically for high-current, low-voltage switching in space-constrained power conversion and battery-powered systems.
FAQ
What is the maximum safe operating temperature for ZXT14P40DXTA?
The device supports junction temperatures from −55 °C to +150 °C. For continuous operation at IC = −4 A, PCB copper area and airflow must limit TJ ≤ 150 °C using the 70 °C/W RθJA value. Derating begins above 25 °C ambient per the 14.4 mW/°C linear factor.
Can ZXT14P40DXTA be used in synchronous rectification?
No - ZXT14P40DXTA is a PNP bipolar transistor, not a MOSFET, and lacks the bidirectional conduction and gate-controlled reverse recovery needed for synchronous rectification. It functions as an actively driven switch, not a self-commutated rectifier.
How are pins 1–4 and pin 8 electrically related?
Pins 1–4 and pin 8 are internally connected to the same collector node. This multi-terminal arrangement lowers effective series resistance and improves current distribution across bond wires, verified in Zetex's package cross-section analysis and thermal imaging reports.
Is the MSOP-8 footprint compatible with standard reflow profiles?
Yes - the MSOP-8 package complies with JEDEC MO-187 and is qualified for standard lead-free reflow (J-STD-20D). Peak temperature must not exceed 260 °C for ≤ 30 seconds; thermal pad soldering requires controlled paste volume to avoid voiding and ensure mechanical reliability.
ZXT14P40DXTA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- *
- Package/Case:
- -
- Packaging:
- Cut Tape (CT)
- Product Status:
- Obsolete
- Transistor Type:
- -
- Current - Collector (Ic) (Max):
- -
- Voltage - Collector Emitter Breakdown (Max):
- -
- Vce Saturation (Max) @ Ib, Ic:
- -
- Current - Collector Cutoff (Max):
- -
- DC Current Gain (hFE) (Min) @ Ic, Vce:
- -
- Power - Max:
- -
- Frequency - Transition:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- -
- Supplier Device Package:
- -
ZXT14P40DXTA FAQ
1.How can I place an order for ZXT14P40DXTA through Aetrix?
Please submit a Request for Quotation (RFQ) for ZXT14P40DXTA 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 ZXT14P40DXTA reliable?
The price and inventory of ZXT14P40DXTA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ZXT14P40DXTA is usually 5 days.
3.What payment methods are accepted for ZXT14P40DXTA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ZXT14P40DXTA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ZXT14P40DXTA?
ZXT14P40DXTA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ZXT14P40DXTA 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 ZXT14P40DXTA?
For technical support, including ZXT14P40DXTA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ZXT14P40DXTA requirements.
6.How does Aetrix verify that ZXT14P40DXTA is sourced from the original manufacturer or authorized distributors?
All ZXT14P40DXTA 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 ZXT14P40DXTA meets industry standards.
7.What is the process for return or replacement of ZXT14P40DXTA?
All ZXT14P40DXTA units undergo pre-shipment inspection (PSI). If there is an issue with ZXT14P40DXTA, 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 ZXT14P40DXTA part is unused and in its original packaging.
Return procedure for ZXT14P40DXTA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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