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Diodes Incorporated ZXTN2040FTA
- Part No.:
- ZXTN2040FTA
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Bipolar Transistors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
ZXTN2040FTA.pdf
- Description:
- TRANS NPN 40V 1A SOT-23-3
- Quantity:
- Payment:
- Shipping:
Inventory:8,769
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Product details
Overview
ZXTN2040FTA from Diodes Incorporated is a 40V NPN medium-power planar transistor in SOT23 package, rated for 1A continuous collector current, VCE(sat) ≤ 500 mV at 1A/100mA drive, and BVCEO = 40 V. It is engineered for power MOSFET gate driving and low-loss switching in DC-DC converters and motor control stages.
For engineers reviewing the ZXTN2040FTA datasheet, ZXTN2040FTA pinout, ZXTN2040FTA application, or ZXTN2040FTA equivalent, key selection criteria include saturation voltage at high IC, thermal resistance (RθJA = 403 °C/W on minimum pad), hFE stability across 1mA–1A, and AEC-Q101 qualification for automotive-grade reliability.
Technical Context
This NPN bipolar junction transistor uses planar epitaxial construction to achieve high gain (hFE = 300–900 at IC = 1mA–1A) and low VCE(sat) (200–500 mV) under defined drive conditions. Its fT = 150 MHz supports fast switching in gate-drive circuits up to ~100 kHz.
Thermal design is constrained by RθJL = 350 °C/W (junction-to-leads) and RθJA = 403 °C/W on minimal FR4 layout. The device operates from –55°C to +150°C and meets AEC-Q101 stress testing for automotive underhood applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | 40 V - Maximum safe collector-emitter voltage with base open; defines blocking capability in switch applications. |
| IC (continuous) | 1 A - Continuous DC current handling; enables direct drive of small MOSFET gates or low-side loads. |
| VCE(sat) | 500 mV @ IC = 1 A, IB = 100 mA - Low conduction loss ensures <0.5 W dissipation at full load, reducing thermal burden. |
| hFE | 300–900 - Wide DC current gain range across operating current; supports stable biasing from signal to power levels. |
| fT | 150 MHz - Transition frequency confirms suitability for gate drive waveforms with rise times <2 ns. |
| RθJA | 403 °C/W - Thermal resistance on minimal PCB pad; limits usable power to ~310 mW at TA = 25°C. |
| Operating TJ | –55°C to +150°C - Extended junction temperature range enables deployment in engine control units and industrial power modules. |
Pinout & Package
Package: SOT23 - surface-mount plastic package with matte tin-plated terminals, moisture sensitivity level 1, UL 94V-0 rated, weight ≈ 0.008 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Emitter) | Current exit path | Connected to ground or low-side return; must handle full load current and support low-inductance layout. |
| 2 (Base) | Control input | Receives current-limited drive (max IB = 100 mA); requires series resistor to limit peak base current during switching. |
| 3 (Collector) | Current entry path | Connected to switched load or MOSFET gate; carries full IC and experiences full VCE swing during off-state. |
Key Features
| Feature | Design Value |
|---|---|
| Low VCE(sat) at high IC | ≤500 mV @ 1 A - Reduces conduction loss and self-heating in high-duty-cycle switching. |
| AEC-Q101 qualified | Stress-tested per automotive reliability standard - validated for underhood use without derating. |
| High hFE consistency | 300–900 over 1mA–1A - Enables simplified bias networks and predictable turn-on behavior across load range. |
| Green, halogen-free construction | Br/Cl <900 ppm, Sb <1000 ppm - Complies with IPC-1752 and EU environmental directives. |
| SOT23 mechanical robustness | UL 94V-0 flammability rating and J-STD-020 Level 1 moisture sensitivity - supports standard reflow assembly without special handling. |
Applications
| Automotive Engine Control Unit (ECU) | Industrial DC-DC Converter Gate Drive |
|---|---|
Use Scenario: Driving N-channel MOSFET gates in fuel injector driver circuits with 12 V supply and PWM frequencies up to 20 kHz. IC Role / Device Role / Timing Role: NPN switch providing low-impedance pull-down path to rapidly discharge MOSFET gate capacitance. Use Value: VCE(sat) ≤ 500 mV ensures <0.5 W dissipation at 1 A, minimizing thermal stress in confined ECU enclosures. | Use Scenario: Active gate control in synchronous buck converter top-side MOSFET drivers with 24 V input and 5 A output. IC Role / Device Role / Timing Role: Medium-current NPN buffer stage translating logic-level PWM to higher-current gate drive signals. Use Value: fT = 150 MHz and hFE ≥ 300 enable clean 100 ns rise/fall edges into 1 nF gate load. |
| Consumer Appliance Motor Driver | Telecom Power Sequencing Circuit |
Use Scenario: Low-side switching of brushed DC motors in HVAC blowers, requiring 1 A peak current and 100% duty cycle operation. IC Role / Device Role / Timing Role: High-current saturated switch replacing discrete MOSFETs where cost and board space are constrained. Use Value: RθJA = 403 °C/W allows 310 mW dissipation on standard FR4, supporting continuous 1 A with <50°C rise above ambient. | Use Scenario: Controlled power-up sequencing of FPGA I/O banks using discrete transistor-based enable logic. IC Role / Device Role / Timing Role: Precision current sink for generating timed delay via RC network discharge. Use Value: Tight VBE(sat) = 1.1 V and low ICES = 100 nA ensure accurate timing accuracy and minimal leakage-induced drift. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar NPN medium-power switching applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ZXTP2041FTA | Complementary PNP device; same VCEO, IC, and package but opposite polarity. | Used in complementary emitter-follower or H-bridge half-bridge configurations, not direct replacement. | Select only when building push-pull or dual-rail gate drive stages requiring matched NPN/PNP pairs. |
| MMBT4401LT1G | Lower VCEO = 40 V (same), but VCE(sat) = 750 mV @ 1 A and hFE = 100–300 - reduced efficiency and gain linearity. | Suitable for lower-performance general-purpose switching, not recommended for high-efficiency gate drive. | Choose only if cost is primary constraint and thermal margin >15°C is available for same IC. |
Compared with ZXTP2041FTA (PNP complement) and MMBT4401LT1G (lower-gain alternative), ZXTN2040FTA delivers superior saturation voltage and gain consistency for high-duty-cycle gate drive, while maintaining AEC-Q101 compliance and green packaging.
Availability
ZXTN2040FTA is available at Aetrix Electronics and suitable for automotive engine control units, industrial DC-DC converters, consumer appliance motor drivers, and telecom power sequencing circuits requiring stable component supply and AEC-Q101 reliability assurance.
Supply support for ZXTN2040FTA 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, headquartered in Plano, Texas, with design and manufacturing operations across Asia and the Americas.
ZXTN2040FTA belongs to Diodes' ZXT series of high-reliability bipolar transistors, designed specifically for automotive-grade power switching and gate-driving applications demanding low VCE(sat), wide hFE range, and extended temperature operation.
FAQ
Is ZXTN2040FTA pin-compatible with standard SOT23 NPN transistors like MMBT2222A?
No. While both use SOT23, ZXTN2040FTA has Collector-Base-Emitter pinout (pin 3–2–1), whereas MMBT2222A uses Emitter-Base-Collector (pin 1–2–3). Incorrect PCB layout causes functional failure. Always verify pin configuration using the top-view marking "N40" and official Diodes AP02002 outline.
What is the maximum allowable base current for continuous operation?
The absolute maximum peak base current is 1 A (per datasheet), but for continuous DC operation, IB must be limited to ≤100 mA to maintain VCE(sat) ≤500 mV at IC = 1 A and avoid secondary breakdown. Derate linearly above 25°C ambient per the thermal curves in DS33668 Rev. 3-2.
Does ZXTN2040FTA support pulsed operation beyond its 1 A DC rating?
Yes. It supports ICM = 2 A peak pulse current with duty cycle ≤2% and pulse width ≤300 µs. This enables short-duration surge handling in motor stall protection or inrush limiting, provided average power remains within the 310 mW derated limit based on PCB thermal design.
Can ZXTN2040FTA be used in linear amplifier applications?
No. It is optimized for saturated switching, not linear amplification. Its hFE variation (300–900) and lack of specified linearity parameters (e.g., distortion, output impedance) make it unsuitable for analog gain stages. Use dedicated RF or audio transistors such as PN2222A or BC847 for linear designs.
ZXTN2040FTA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Transistor Type:
- NPN
- Current - Collector (Ic) (Max):
- 1 A
- Voltage - Collector Emitter Breakdown (Max):
- 40 V
- Vce Saturation (Max) @ Ib, Ic:
- 500mV @ 100mA, 1A
- Current - Collector Cutoff (Max):
- 100nA
- DC Current Gain (hFE) (Min) @ Ic, Vce:
- 300 @ 500mA, 5V
- Power - Max:
- 350 mW
- Frequency - Transition:
- 150MHz
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
ZXTN2040FTA FAQ
1.How can I place an order for ZXTN2040FTA through Aetrix?
Please submit a Request for Quotation (RFQ) for ZXTN2040FTA 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 ZXTN2040FTA reliable?
The price and inventory of ZXTN2040FTA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ZXTN2040FTA is usually 5 days.
3.What payment methods are accepted for ZXTN2040FTA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ZXTN2040FTA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ZXTN2040FTA?
ZXTN2040FTA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ZXTN2040FTA 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 ZXTN2040FTA?
For technical support, including ZXTN2040FTA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ZXTN2040FTA requirements.
6.How does Aetrix verify that ZXTN2040FTA is sourced from the original manufacturer or authorized distributors?
All ZXTN2040FTA 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 ZXTN2040FTA meets industry standards.
7.What is the process for return or replacement of ZXTN2040FTA?
All ZXTN2040FTA units undergo pre-shipment inspection (PSI). If there is an issue with ZXTN2040FTA, 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 ZXTN2040FTA part is unused and in its original packaging.
Return procedure for ZXTN2040FTA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ZXTN2040FTA Tags
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