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Diodes Incorporated ZXTN25040DZTA
- Part No.:
- ZXTN25040DZTA
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Bipolar Transistors
- Package:
- TO-243AA
- Datasheet:
-
ZXTN25040DZTA.pdf
- Description:
- TRANS NPN 40V 5A SOT-89-3
- Quantity:
- Payment:
- Shipping:
Inventory:3,853
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Product details
Overview
ZXTN25040DZTA from Diodes Incorporated is a 40V NPN medium-power bipolar junction transistor in SOT89 package, rated for 5.0A continuous collector current, with low saturation voltage (VCE(sat) ≤ 60 mV @ 1A) and 38 mΩ equivalent on-resistance, designed for high-efficiency switching in DC-DC modules and motor drive stages.
For engineers reviewing the ZXTN25040DZTA datasheet, ZXTN25040DZTA pinout, ZXTN25040DZTA application, or ZXTN25040DZTA equivalent, key selection criteria include VCEO = 40 V, IC = 5 A, RθJA = 28 °C/W (with heatsink), VBE(sat) = 1.1 V @ 5 A, and complementary pairing with ZXTP25040DZ for H-bridge designs.
Technical Context
This NPN transistor operates as a medium-power switch in linear and saturated modes, supporting pulsed operation up to 10 A (ICM) with fT = 190 MHz for fast switching transitions. Its low VCE(sat) and high hFE (300–900 across 10 mA–5 A) enable efficient current control without external gate drivers.
The device features robust blocking capability: VCBO = 130 V, VCEX = 130 V, and VECO = 6 V, making it suitable for inductive load switching where reverse voltage transients occur. Thermal performance is optimized for SOT89 mounting on ≥50 mm × 50 mm copper pads (RθJA = 51 °C/W) or short-duration pulses (RθJA = 28 °C/W).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | 40 V - Maximum safe collector-emitter voltage under forward bias; defines upper limit for DC-DC flyback or relay coil drive circuits. |
| IC (continuous) | 5 A - Continuous collector current rating at TA = 25°C with adequate PCB copper; supports fan motors and solenoid loads without forced cooling. |
| VCE(sat) | 60 mV @ 1 A, 215 mV @ 5 A - Low conduction loss enables <1 W dissipation at 5 A, critical for thermally constrained backlight inverters. |
| hFE | 300–900 - High DC current gain across 10 mA–5 A range reduces required base drive current, easing microcontroller GPIO interface. |
| fT | 190 MHz - Transition frequency confirms suitability for >100 kHz PWM switching in DC-DC converters and gate driver stages. |
| RθJA | 28 °C/W (t < 5 s) - Junction-to-ambient thermal resistance under short-pulse conditions; enables burst-mode operation in emergency lighting. |
Pinout & Package
Package: SOT89 - surface-mount plastic package with exposed collector tab for thermal conduction; 0.05 g mass; UL 94V-0 rated molding compound; matte tin-plated leads.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 (Emitter) | E | Current return path; connected to ground or low-side reference; electrically isolated from tab. |
| Pin 2 (Collector) | C | Main power output node; tied to exposed metal tab for direct PCB thermal coupling and current conduction. |
| Pin 3 (Base) | B | Control input; requires ~500 mA base current for full saturation at 5 A collector current. |
Key Features
| Feature | Design Value |
|---|---|
| Low saturation voltage | VCE(sat) ≤ 60 mV @ 1 A enables <0.06 W conduction loss-critical for thermally limited DC-DC modules. |
| High current gain | hFE ≥ 300 @ 1 A allows direct drive from 3.3 V/5 V MCU GPIOs without intermediate buffer stages. |
| Complementary PNP pairing | ZXTP25040DZ shares identical voltage/current ratings and SOT89 footprint-enables matched H-bridge or push-pull designs. |
| Automotive-ready qualification | Manufactured in IATF 16949 certified facilities; PPAP-capable; supports AEC-Q101 stress testing upon request. |
Applications
| Emergency Lighting Control | DC Fan Motor Driver |
|---|---|
Use Scenario: Constant-current LED string switching during mains failure, with rapid turn-on response. IC Role / Device Role / Timing Role: High-side or low-side power switch controlling LED current path. Use Value: VCE(sat) ≤ 60 mV minimizes heat generation in sealed enclosures; 5 A rating supports multi-string configurations. |
Use Scenario: PWM-controlled 12 V/24 V brushless DC fan in industrial HVAC systems. IC Role / Device Role / Timing Role: Low-side switching element in half-bridge topology with external freewheeling diode. Use Value: fT = 190 MHz ensures clean 25 kHz PWM edges; hFE stability over temperature avoids duty cycle drift. |
| Solenoid & Relay Driver | MOSFET Gate Driver Stage |
Use Scenario: Driving 24 V/1 A industrial solenoids in PLC output modules with snubber-free operation. IC Role / Device Role / Timing Role: Saturated switch providing fast inductive turn-off via active clamping. Use Value: VECO = 6 V withstands reverse EMF spikes; 10 A peak rating absorbs inductive kickback energy. |
Use Scenario: Level-shifting and current-boosting stage between MCU GPIO and high-capacitance power MOSFET gates. IC Role / Device Role / Timing Role: Medium-power BJT amplifier delivering >500 mA peak gate charge current. Use Value: Low VBE(sat) = 1.1 V @ 5 A ensures minimal voltage drop across base resistor network. |
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 |
|---|---|---|---|
| ZXTN25040DHQTA | Same die, DFN2020-3 package (0.65 mm pitch); RθJA = 120 °C/W (no exposed tab); 3.0 A IC rating. | Limited to lower-current, space-constrained applications; unsuitable for >3 A thermal loads. | Select when board area is critical and power dissipation ≤ 0.75 W; avoid for motor/solenoid use. |
| MJD127G | 40 V VCEO, 8 A IC, TO-252 package; VCE(sat) = 1.2 V @ 5 A; hFE = 20–100. | Higher saturation loss (≥6×), requires higher base drive; better for ruggedized industrial environments. | Choose for legacy TO-252 layouts or where mechanical robustness outweighs efficiency needs. |
Compared with ZXTN25040DZTA, ZXTN25040DHQTA trades thermal performance for miniaturization, while MJD127G sacrifices saturation efficiency for higher surge tolerance and package ruggedness-making ZXTN25040DZTA optimal for thermally sensitive, high-frequency switching where low-loss conduction is prioritized.
Availability
ZXTN25040DZTA is available at Aetrix Electronics and suitable for emergency lighting circuits, DC fan motor control, and solenoid/relay driving requiring stable component supply and consistent parametric performance across production batches.
Supply support for ZXTN25040DZTA 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, manufacturing, and distribution operations across Asia, Europe, and North America.
ZXTN25040DZTA belongs to Diodes' ZXT series of medium-power bipolar transistors engineered specifically for high-efficiency switching in automotive-grade and industrial power conversion applications.
FAQ
What is the maximum allowable junction temperature for ZXTN25040DZTA?
The absolute maximum operating junction temperature is +150°C, with storage temperature ranging from –55°C to +150°C. Derating begins at +25°C ambient per the linear derating factor (e.g., 19.2 mW/°C for 2.4 W PD case), and sustained operation above +125°C requires thermal modeling of PCB copper area and airflow.
Can ZXTN25040DZTA be used in avalanche mode?
No-ZXTN25040DZTA is not rated for repetitive avalanche operation. Its BVCEO = 40 V is a DC blocking specification; exceeding this voltage risks permanent breakdown. For inductive load switching, external clamping (e.g., TVS or flyback diode) is mandatory to limit VCE transients.
Is the SOT89 package lead (Pin 2) electrically connected to the collector?
Yes-the center pin (Pin 2) and the exposed metal tab are internally connected to the collector terminal. This dual-path connection provides both electrical conduction and thermal conduction to the PCB copper pour, and must be routed to the collector net-not left floating or grounded.
How does ZXTN25040DZTA compare to MOSFET alternatives like DMN3025LSD?
ZXTN25040DZTA offers lower gate-drive complexity (no gate charge requirement) and superior linearity in analog current regulation, but higher conduction loss than DMN3025LSD's 2.5 mΩ RDS(on). It excels in cost-sensitive, low-frequency (<100 kHz) switching where BJT simplicity and SOA robustness outweigh MOSFET efficiency advantages.
ZXTN25040DZTA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- TO-243AA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Transistor Type:
- NPN
- Current - Collector (Ic) (Max):
- 5 A
- Voltage - Collector Emitter Breakdown (Max):
- 40 V
- Vce Saturation (Max) @ Ib, Ic:
- 260mV @ 500mA, 5A
- Current - Collector Cutoff (Max):
- 50nA (ICBO)
- DC Current Gain (hFE) (Min) @ Ic, Vce:
- 300 @ 10mA, 2V
- Power - Max:
- 2.4 W
- Frequency - Transition:
- 190MHz
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-89-3
ZXTN25040DZTA FAQ
1.How can I place an order for ZXTN25040DZTA through Aetrix?
Please submit a Request for Quotation (RFQ) for ZXTN25040DZTA 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 ZXTN25040DZTA reliable?
The price and inventory of ZXTN25040DZTA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ZXTN25040DZTA is usually 5 days.
3.What payment methods are accepted for ZXTN25040DZTA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ZXTN25040DZTA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ZXTN25040DZTA?
ZXTN25040DZTA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ZXTN25040DZTA 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 ZXTN25040DZTA?
For technical support, including ZXTN25040DZTA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ZXTN25040DZTA requirements.
6.How does Aetrix verify that ZXTN25040DZTA is sourced from the original manufacturer or authorized distributors?
All ZXTN25040DZTA 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 ZXTN25040DZTA meets industry standards.
7.What is the process for return or replacement of ZXTN25040DZTA?
All ZXTN25040DZTA units undergo pre-shipment inspection (PSI). If there is an issue with ZXTN25040DZTA, 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 ZXTN25040DZTA part is unused and in its original packaging.
Return procedure for ZXTN25040DZTA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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