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Diodes Incorporated ZXTP749FTA
- Part No.:
- ZXTP749FTA
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Bipolar Transistors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
ZXTP749FTA.pdf
- Description:
- TRANS PNP 25V 3A SOT-23-3
- Quantity:
- Payment:
- Shipping:
Inventory:5,744
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Product details
Overview
ZXTP749FTA from Diodes Incorporated is a 25V PNP low-saturation transistor in SOT23 package, rated for -3A continuous collector current, -25V VCEO, and VCE(sat) < -150 mV at -1A. It serves as a high-current switching element in MOSFET gate drive and automotive power control circuits.
For engineers reviewing the ZXTP749FTA datasheet, ZXTP749FTA pinout, ZXTP749FTA application, or ZXTP749FTA equivalent, key selection criteria include verified -25V VCEO, -150mV saturation voltage at -1A, AEC-Q101 qualification, SOT23 thermal resistance (RθJA = 172°C/W), and complementary pairing with ZXTN649F.
Technical Context
This PNP bipolar junction transistor operates with forward blocking up to -35V (VCBO) and supports pulsed base currents up to -2A. Its hFE is characterized from -100mA to -6A, maintaining ≥100 at -6A under VCE = -2V, enabling stable gain in high-current switching.
The device delivers RCE(sat) = 87 mΩ and integrates matte tin-plated leads compliant with MIL-STD-202 solderability. Thermal performance is specified for 15mm × 15mm × 1.6mm FR4 PCB with single-sided 1 oz. copper, yielding RθJL = 79°C/W to collector lead.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | -25 V - Maximum safe collector-emitter reverse bias before breakdown in common-emitter configuration |
| IC (continuous) | -3 A - Sustained DC current handling capability without thermal runaway on standard PCB layout |
| VCE(sat) | < -150 mV @ -1A, -100mA - Ensures minimal conduction loss in high-side switch or gate driver pull-down stage |
| PD | 725 mW - Power dissipation limit at TA = +25°C with defined PCB copper area and airflow |
| hFE | 100 min @ -6A, VCE = -2V - Confirmed current gain retention under full-rated load for predictable base drive sizing |
| RθJA | 172 °C/W - Junction-to-ambient thermal resistance defining temperature rise per watt on reference board |
| ESD HBM | 4,000 V - Human Body Model rating confirming robustness during board assembly and handling |
Pinout & Package
Package: SOT23 - Surface-mount plastic package with 3 terminals, 0.008 g mass, UL 94V-0 flammability rating, and moisture sensitivity level 1 (J-STD-020).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Emitter) | Current source terminal in PNP operation | Connected to higher potential rail; carries full load current into external circuit |
| 2 (Base) | Control input for minority-carrier injection | Receives negative current to turn on; requires -100mA for full saturation at -1A IC |
| 3 (Collector) | Current sink terminal in PNP operation | Connected to load return path; voltage swing limited to -25V maximum relative to emitter |
Key Features
| Feature | Design Value |
|---|---|
| Low VCE(sat) | < -150 mV @ -1A ensures ≤150 mW conduction loss in gate-drive pull-down stage |
| AEC-Q101 qualification | Validated for automotive power switching applications including engine control and body electronics |
| Complementary NPN pairing | ZXTN649F enables matched push-pull output stages with symmetrical switching characteristics |
| Green construction | Halogen- and antimony-free molding compound (<900 ppm Br/Cl, <1000 ppm Sb) meets global environmental compliance |
| High pulse current capability | ICM = -6A supports short-duration motor stall or inrush current events without failure |
Applications
| Automotive Engine Control | MOSFET Gate Driving |
|---|---|
Use Scenario: Switching 12V fuel injector solenoids in ECU output stages. IC Role / Device Role / Timing Role: High-side PNP switch controlling current flow to inductive load. Use Value: -25V VCEO and -3A IC safely handle back-EMF and peak coil current without snubber components. | Use Scenario: Pull-down stage in half-bridge gate driver for N-channel power MOSFETs. IC Role / Device Role / Timing Role: Fast-turn-off active clamp for gate node discharge. Use Value: VCE(sat) < -150 mV minimizes Miller-effect delay and ensures clean gate voltage transitions. |
| Industrial Motor Control | Power Supply Sequencing |
Use Scenario: Enabling 24V DC brush motor direction control via H-bridge upper-leg switches. IC Role / Device Role / Timing Role: High-current PNP switch in totem-pole output configuration. Use Value: hFE ≥100 at -6A allows compact base drive design while sustaining stall current. | Use Scenario: Controlled power-up sequencing of FPGA core and I/O rails using discrete enable logic. IC Role / Device Role / Timing Role: Precision-controlled high-side switch for rail activation timing. Use Value: Tight VCE(sat) distribution ensures predictable voltage drop and timing margin across temperature. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar PNP switching applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ZXTP2026F | VCEO = -20V, IC = -2A, VCE(sat) = -180mV @ -1A | Lower voltage/current rating; suitable only for ≤20V systems | Select when lower cost and reduced performance margin are acceptable |
| MBT3906DW1T1G | VCEO = -40V, IC = -200mA, VCE(sat) = -300mV @ -50mA | Higher voltage rating but insufficient current capacity for gate drive or motor loads | Use only in low-power signal-level switching, not power switching |
Compared with ZXTP749FTA, ZXTP2026F trades 5V/1A headroom for cost reduction, while MBT3906DW1T1G offers higher blocking voltage but cannot support >200mA continuous loads-making ZXTP749FTA uniquely balanced for 24V industrial gate driving and AEC-Q101-compliant automotive switching.
Availability
ZXTP749FTA is available at Aetrix Electronics and suitable for automotive engine control, industrial motor drive, and MOSFET gate driver designs requiring stable component supply, AEC-Q101 reliability, and SOT23 thermal performance.
Supply support for ZXTP749FTA 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 sales operations across Asia, Europe, and North America.
The ZXTP749FTA belongs to Diodes' high-reliability PNP transistor product line, engineered specifically for automotive and industrial power switching where low saturation voltage, AEC-Q101 qualification, and robust thermal performance are mandatory.
FAQ
What is the maximum allowable collector-emitter voltage for ZXTP749FTA?
The absolute maximum VCEO is -25V at TA = +25°C. This rating applies in common-emitter configuration with base open. Exceeding this value risks avalanche breakdown and permanent device damage, especially under transient conditions without clamping.
Does ZXTP749FTA require a heatsink in standard SOT23 mounting?
No external heatsink is required for ≤725 mW steady-state dissipation on a 15mm × 15mm × 1.6mm FR4 PCB with 1 oz. copper. The RθJA of 172°C/W results in ~125°C junction rise at full power-within the -55°C to +150°C operating range if ambient stays below +25°C.
Is ZXTP749FTA pin-compatible with ZXTN649F?
No-ZXTP749FTA (PNP) and ZXTN649F (NPN) share identical SOT23 pinout (Emitter-Base-Collector), but their polarity and biasing requirements differ fundamentally. They are complementary types intended for paired use in push-pull circuits, not direct replacements.
Can ZXTP749FTA be used in linear amplification mode?
It is not optimized for linear operation. The datasheet specifies hFE and VCE(sat) under switching conditions (pulsed, duty cycle ≤2%). No small-signal parameters (e.g., fT, Cobo) are guaranteed for analog gain applications, and thermal instability may occur under sustained linear bias.
ZXTP749FTA 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:
- PNP
- Current - Collector (Ic) (Max):
- 3 A
- Voltage - Collector Emitter Breakdown (Max):
- 25 V
- Vce Saturation (Max) @ Ib, Ic:
- 350mV @ 300mA, 3A
- Current - Collector Cutoff (Max):
- 50nA (ICBO)
- DC Current Gain (hFE) (Min) @ Ic, Vce:
- 200 @ 100mA, 2V
- Power - Max:
- 725 mW
- Frequency - Transition:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
ZXTP749FTA FAQ
1.How can I place an order for ZXTP749FTA through Aetrix?
Please submit a Request for Quotation (RFQ) for ZXTP749FTA 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 ZXTP749FTA reliable?
The price and inventory of ZXTP749FTA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ZXTP749FTA is usually 5 days.
3.What payment methods are accepted for ZXTP749FTA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ZXTP749FTA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ZXTP749FTA?
ZXTP749FTA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ZXTP749FTA 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 ZXTP749FTA?
For technical support, including ZXTP749FTA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ZXTP749FTA requirements.
6.How does Aetrix verify that ZXTP749FTA is sourced from the original manufacturer or authorized distributors?
All ZXTP749FTA 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 ZXTP749FTA meets industry standards.
7.What is the process for return or replacement of ZXTP749FTA?
All ZXTP749FTA units undergo pre-shipment inspection (PSI). If there is an issue with ZXTP749FTA, 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 ZXTP749FTA part is unused and in its original packaging.
Return procedure for ZXTP749FTA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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