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Diodes Incorporated ZXTN25040DFHTA
- Part No.:
- ZXTN25040DFHTA
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Bipolar Transistors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
ZXTN25040DFHTA.pdf
- Description:
- TRANS NPN 40V 4A SOT-23-3
- Quantity:
- Payment:
- Shipping:
Inventory:26,961
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Product details
Overview
ZXTN25040DFHTA from Diodes Incorporated is a 40V NPN medium-power planar transistor in SOT23 package, designed for high-current switching in power electronics. It delivers 4A continuous collector current, 35mΩ RCE(sat), VCE(sat) < 55mV at 1A, hFE ≥ 300 at 1A, and 1.25W power dissipation - enabling efficient MOSFET gate driving and DC-DC converter primary-side switching.
For engineers reviewing the ZXTN25040DFHTA datasheet, ZXTN25040DFHTA pinout, ZXTN25040DFHTA application, or ZXTN25040DFHTA equivalent, key selection criteria include saturation voltage under high IC, thermal resistance (RθJA = 100°C/W on 50mm×50mm 2oz Cu), safe operating area at 100µs–DC, ESD robustness (HBM 4kV), and AEC-Q101 readiness via automotive-grade variants.
Technical Context
This NPN transistor operates with VCEO = 40V, VCBO = 130V, and VEBO = 7V, supporting robust blocking in medium-voltage switch nodes. Its fT = 190MHz enables fast switching in PWM-driven loads up to several hundred kHz.
Designed for low-loss conduction, it achieves RCE(sat) = 35mΩ and VCE(sat) ≤ 55mV at IC = 1A/ IB = 100mA, with thermal performance validated across PCB copper areas (RθJA = 171–69°C/W) and junction temperature range of –55°C to +150°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | 40V - Maximum safe collector-emitter voltage in forward-active mode; defines upper rail limit for switch applications. |
| IC (continuous) | 4A - Sustained load current capability without derating on 50mm×50mm 2oz Cu PCB; supports motor drivers and fan controllers. |
| VCE(sat) | <55mV @ 1A/100mA - Ultra-low saturation voltage minimizes conduction loss and self-heating in high-duty-cycle operation. |
| hFE | 300 min @ 1A - High DC current gain ensures reliable base drive efficiency and reduces required base current in discrete switch designs. |
| RθJA | 100°C/W - Thermal resistance on 50mm×50mm 2oz Cu; enables 1.25W dissipation at ≤ 25°C ambient before reaching 150°C junction limit. |
| fT | 190MHz - Transition frequency supports clean turn-on/turn-off in DC-DC converters operating up to ~500kHz. |
| ESD HBM | 4000V - Robust electrostatic discharge immunity per JEDEC JESD22-A114; reduces handling sensitivity in automated assembly. |
Pinout & Package
Package: SOT23 - surface-mount plastic package with matte tin terminals, UL 94V-0 rated molding compound, 0.008g weight, and moisture sensitivity level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Emitter) | Current sink terminal | Low-impedance return path; connected to ground or low-side reference in common-emitter configurations. |
| 2 (Base) | Control input | Receives current-limited drive signal; requires ≥100mA for full saturation at 1A collector current. |
| 3 (Collector) | High-current output | Switches load between supply rail and emitter; handles up to 4A continuous with minimal voltage drop. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low RCE(sat) | 35mΩ - Reduces I²R losses by >40% vs. standard SOT23 transistors at 1A, improving thermal margin in compact layouts. |
| High hFE stability | ≥300 @ 1A - Maintains consistent gain across temperature (–55°C to +150°C), simplifying base drive design without feedback compensation. |
| JEDEC-qualified reliability | Qualified to AEC-Q101 stress test standards - ensures long-term parametric stability in automotive-grade production environments. |
| Green construction | Halogen- and antimony-free, RoHS 3 compliant - meets global environmental compliance requirements without performance trade-offs. |
Applications
| MOSFET Gate Driver | DC-DC Converter Switch |
|---|---|
Use Scenario: Driving the gate of a 40V-rated N-channel MOSFET in a synchronous buck converter. IC Role / Device Role / Timing Role: NPN switch providing low-impedance pull-down path during MOSFET turn-off, minimizing shoot-through risk. Use Value: VCE(sat) <55mV at 1A ensures sub-10ns fall time and <10mW dissipation during gate discharge, preserving efficiency. |
Use Scenario: Low-side switching element in non-synchronous boost or flyback topologies. IC Role / Device Role / Timing Role: Primary power switch controlling energy transfer into inductor/capacitor networks at 100–500kHz. Use Value: 4A continuous rating and 190MHz fT support stable operation at 300kHz with <5% duty-cycle distortion. |
| Brushed DC Motor Control | DC Fan Driver |
Use Scenario: H-bridge half-bridge leg controlling direction and speed of 24V brushed motors in HVAC actuators. IC Role / Device Role / Timing Role: High-current NPN switch enabling PWM-based torque regulation with fast transient response. Use Value: RθJA = 100°C/W allows 2.5A RMS current at 50°C ambient without heatsink, reducing BOM count. |
Use Scenario: On/off and speed control of 12V/24V axial cooling fans in industrial power supplies. IC Role / Device Role / Timing Role: Low-side switch modulating fan voltage via PWM, interfacing directly with microcontroller GPIO. Use Value: hFE ≥300 at 1A permits direct MCU drive (3.3V/20mA) without external buffer, cutting component count. |
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 |
|---|---|---|---|
| ZXTN2010E6TA | VCEO = 20V, IC = 1.5A, RCE(sat) = 120mΩ - lower voltage/current rating and higher saturation resistance. | Suitable only for ≤12V logic-level loads; insufficient for 24V motor or 40V DC-DC applications. | Select when board space is constrained and load demands are ≤1A/20V; not a drop-in replacement. |
| MMBT4401LT1G | VCEO = 40V, IC = 600mA, hFE = 100 min - significantly lower current capacity and gain. | Limited to signal switching or low-power gate driving; cannot sustain 4A or deliver 300 hFE. | Use only for cost-sensitive, low-current signal paths where thermal performance is non-critical. |
Compared with ZXTN2010E6TA and MMBT4401LT1G, ZXTN25040DFHTA uniquely combines 40V blocking, 4A current, 35mΩ RCE(sat), and 300 hFE in SOT23 - making it the only option among the three capable of driving 24V/3A loads without derating or parallel devices.
Availability
ZXTN25040DFHTA is available at Aetrix Electronics and suitable for MOSFET gate drivers, DC-DC converters, and brushed DC motor control requiring stable component supply, traceable sourcing, and lifecycle continuity.
Supply support for ZXTN25040DFHTA 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.
ZXTN25040DFHTA belongs to Diodes' ZXT series of high-gain, low-saturation medium-power transistors - engineered specifically for automotive-qualified switching, industrial motor control, and high-efficiency DC-DC conversion.
FAQ
Is ZXTN25040DFHTA qualified for automotive applications?
No - ZXTN25040DFHTA is an industrial-grade part qualified to JEDEC standards and AEC-Q101 stress tests, but it lacks PPAP documentation and IATF 16949 manufacturing certification. For automotive use, select the Q-suffix variant ZXTN25040DFHQTA, which includes full AEC-Q101 qualification, change control, and PPAP support.
What is the maximum safe operating frequency for ZXTN25040DFHTA?
The transistor's fT = 190MHz indicates usable switching up to ~500kHz in hard-switched applications. Safe operation depends on layout, gate drive strength, and load inductance - measured delay/rise/fall times (td = 64ns, tr = 108ns, tf = 130ns) confirm suitability for 300kHz PWM with <10% dead-time overhead.
Can ZXTN25040DFHTA replace a MOSFET in low-side switching?
It can replace low-current MOSFETs (<1A) where gate drive complexity must be minimized, but not high-current MOSFETs. With RCE(sat) = 35mΩ, its conduction loss at 4A is 560mW - comparable to a 35mΩ MOSFET at same current, but it lacks voltage-controlled operation and suffers from base current overhead and slower turn-off than optimized MOSFETs.
What PCB layout practices maximize thermal performance?
To achieve the rated 1.25W dissipation, use a 50mm×50mm 2oz copper pour connected directly to the collector pad (Pin 3), with thermal vias to inner/ground layers. The SOT23 footprint must follow Diodes' recommended pad layout (X = 0.8mm, Y = 0.9mm, C = 2.0mm) to ensure solder joint reliability and minimize RθJA drift.
ZXTN25040DFHTA 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):
- 4 A
- Voltage - Collector Emitter Breakdown (Max):
- 40 V
- Vce Saturation (Max) @ Ib, Ic:
- 190mV @ 400mA, 4A
- Current - Collector Cutoff (Max):
- 50nA (ICBO)
- DC Current Gain (hFE) (Min) @ Ic, Vce:
- 300 @ 10mA, 2V
- Power - Max:
- 1.25 W
- Frequency - Transition:
- 190MHz
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
ZXTN25040DFHTA FAQ
1.How can I place an order for ZXTN25040DFHTA through Aetrix?
Please submit a Request for Quotation (RFQ) for ZXTN25040DFHTA 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 ZXTN25040DFHTA reliable?
The price and inventory of ZXTN25040DFHTA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ZXTN25040DFHTA is usually 5 days.
3.What payment methods are accepted for ZXTN25040DFHTA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ZXTN25040DFHTA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ZXTN25040DFHTA?
ZXTN25040DFHTA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ZXTN25040DFHTA 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 ZXTN25040DFHTA?
For technical support, including ZXTN25040DFHTA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ZXTN25040DFHTA requirements.
6.How does Aetrix verify that ZXTN25040DFHTA is sourced from the original manufacturer or authorized distributors?
All ZXTN25040DFHTA 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 ZXTN25040DFHTA meets industry standards.
7.What is the process for return or replacement of ZXTN25040DFHTA?
All ZXTN25040DFHTA units undergo pre-shipment inspection (PSI). If there is an issue with ZXTN25040DFHTA, 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 ZXTN25040DFHTA part is unused and in its original packaging.
Return procedure for ZXTN25040DFHTA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ZXTN25040DFHTA Tags
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