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Diodes Incorporated FZT789AQTA
- Part No.:
- FZT789AQTA
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Bipolar Transistors
- Package:
- TO-261-4, TO-261AA
- Datasheet:
-
FZT789AQTA.pdf
- Description:
- TRANS PNP 35V 3A SOT-223-3
- Quantity:
- Payment:
- Shipping:
Inventory:1,000
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Product details
Overview
FZT789AQTA from Diodes Incorporated is a 25V PNP medium-power transistor in SOT223 package, rated for -3A continuous collector current, with VCE(sat) < -250mV at -1A and RCE(sat) = 93mΩ, designed for high-reliability automotive gate driving and fast-charge converter switching.
For engineers reviewing the FZT789AQTA datasheet, FZT789AQTA pinout, FZT789AQTA application, or FZT789AQTA equivalent, key selection criteria include AEC-Q101 qualification, low saturation resistance, thermal performance on 25mm×25mm 2oz copper, and complementary pairing with FZT689B in half-bridge configurations.
Technical Context
This PNP bipolar junction transistor operates with a minimum BVCEO of -25V and supports peak pulse current up to -6A, enabling robust switching in high-side power control paths. Its hFE remains ≥100 at -6A, ensuring stable gain under heavy load conditions typical in IGBT/MOSFET gate drive stages.
The device features low thermal resistance (RθJL = 12.9°C/W) and is characterized for operation from -55°C to +150°C, meeting automotive under-hood temperature requirements. ESD ratings of 4kV HBM and 400V MM confirm suitability for assembly environments with moderate electrostatic risk.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | -25V - Maximum safe collector-emitter voltage before breakdown in common-emitter configuration |
| IC (continuous) | -3A - Sustained current-handling capability without thermal derating on standard 25mm×25mm 2oz copper PCB |
| VCE(sat) | < -250mV @ -1A/ -10mA - Enables <0.25W conduction loss per switch in low-voltage gate drive rails |
| RCE(sat) | 93mΩ - Equivalent on-resistance supporting efficient power switching with minimal voltage drop |
| hFE | ≥100 @ -6A - Maintains usable current gain even at maximum rated pulsed current for reliable base drive scaling |
| fT | 100MHz - Supports fast switching transitions in DC-DC converters operating up to ~10MHz practical frequency |
| RθJL | 12.9°C/W - Low junction-to-lead thermal resistance enables direct heat transfer to PCB copper pour or heatsink tab |
Pinout & Package
SOT223 package with exposed collector tab for thermal and electrical connection; molded green halogen-free plastic housing rated UL 94V-0; moisture sensitivity level 1 per J-STD-020.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Emitter (E) | Current source terminal in PNP operation | Connected to positive rail in high-side switch; carries full load current with minimal voltage rise |
| Base (B) | Control input for minority-carrier injection | Receives negative current to turn on; requires -10mA to saturate at -1A output |
| Collector (C) | Main current sink and thermal path | Exposed metal tab serves as primary heat dissipation path and common node for PCB copper thermal relief |
| Collector Tab (C) | Secondary collector connection / thermal pad | Electrically and thermally tied to collector; must be soldered to ≥25mm² copper area for rated 2.0W power dissipation |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control, body electronics, and ADAS power stages |
| Low VCE(sat) & RCE(sat) | Reduces conduction losses by >40% vs. standard PNP transistors at -1A, improving efficiency in battery-powered systems |
| High hFE up to -6A | Enables simplified base drive circuitry with lower base current requirements across full load range |
| Lead-free & Green construction | Complies with RoHS 2 and halogen-free standards (<900ppm Br/Cl, <1000ppm Sb), suitable for global automotive supply chains |
| ESD robustness | 4kV HBM rating eliminates need for external protection in most board-level handling and assembly scenarios |
Applications
| Power MOSFET Gate Driving | Battery-Powered Circuits |
|---|---|
Use Scenario: Driving high-side N-channel MOSFETs in synchronous buck converters for automotive infotainment power supplies. IC Role / Device Role / Timing Role: PNP switch providing fast, low-loss pull-up path for MOSFET gate during turn-on phase. Use Value: 93mΩ RCE(sat) minimizes gate charge time and reduces shoot-through risk during dead-time transitions. | Use Scenario: Enabling/disabling power rails in portable medical monitors with Li-ion battery input. IC Role / Device Role / Timing Role: High-side load switch controlling 3.3V/5V system domains with reverse-polarity protection. Use Value: -25V VCEO and -55°C to +150°C operation ensure reliability across battery voltage sag and ambient extremes. |
| Fast Charge Converters | Low Loss Power Switching |
Use Scenario: Active clamping and gate drive in 30W USB PD fast-charge adapters. IC Role / Device Role / Timing Role: Synchronized PNP switch in active clamp snubber network to recover leakage energy. Use Value: 100MHz fT and 35ns ton support precise timing alignment with primary-side controller at 200–300kHz switching frequencies. | Use Scenario: High-efficiency 12V-to-5V step-down regulator in industrial PLC I/O modules. IC Role / Device Role / Timing Role: Medium-power pass element in linear or hybrid switching-linear regulators. Use Value: 2.0W power dissipation on 25mm×25mm 2oz copper allows compact layout without external heatsink. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar PNP medium-power transistor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| FZT788AQTA | Lower VCEO (-20V), same SOT223 package and AEC-Q101 qualification | Restricted to ≤12V systems; unsuitable for 24V automotive gate drive | Select only when absolute maximum voltage stress remains below -18V and cost optimization is prioritized |
| MBT3906DW1T1G | Smaller SOT-363 package, lower IC (-200mA), no AEC-Q101 qualification | Limited to signal-level switching; not rated for power switching or automotive use | Use only in non-automotive, low-current bias or logic interface roles where space is critical |
Compared with FZT788AQTA and MBT3906DW1T1G, the FZT789AQTA uniquely delivers -25V breakdown, -3A current, and AEC-Q101 compliance in a thermally optimized SOT223 package-making it the sole choice for automotive-grade medium-power PNP switching where voltage margin, thermal headroom, and qualification integrity are mandatory.
Availability
FZT789AQTA is available at Aetrix Electronics and suitable for automotive gate driving, fast-charge converters, and low-loss power switching requiring stable component supply with guaranteed AEC-Q101 traceability and PPAP documentation.
Supply support for FZT789AQTA 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 components for automotive, industrial, and consumer markets.
The FZT789AQTA belongs to Diodes' automotive-qualified bipolar transistor product line, engineered specifically for robust high-side switching in harsh-environment power management and gate drive circuits.
FAQ
What is the maximum allowable power dissipation for FZT789AQTA on a standard PCB?
The FZT789AQTA delivers 2.0W maximum power dissipation when mounted on 25mm×25mm 2oz copper per JEDEC test condition. This assumes still-air environment and proper soldering of the exposed collector tab to the copper area. Derating is required above +25°C ambient, with full derating to zero at +105°C case temperature.
Is FZT789AQTA pin-compatible with its complementary NPN counterpart?
No-FZT789AQTA (PNP, SOT223) and FZT689B (NPN, SOT223) share identical package outline and pin assignment (Emitter-Base-Collector), but polarity reversal means external circuit topology must invert biasing and signal direction. They are functionally complementary, not drop-in replacements.
Does FZT789AQTA require external base resistors in gate-drive applications?
Yes-base current must be actively limited to prevent overdrive and thermal runaway. For -1A collector current, a -10mA base drive is specified; a series resistor (e.g., 470Ω from -5V logic) ensures safe, saturated operation while maintaining hFE stability across temperature.
How does the "Green" designation impact PCB assembly processes?
The "Green" designation confirms halogen- and antimony-free molding compound (<900ppm Br/Cl, <1000ppm Sb) and matte tin plating compatible with standard lead-free reflow profiles (peak 260°C). No special flux or cleaning is required, and compatibility with IPC-J-STD-020 Level 1 moisture sensitivity simplifies factory handling.
FZT789AQTA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- TO-261-4, TO-261AA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Transistor Type:
- PNP
- Current - Collector (Ic) (Max):
- 3 A
- Voltage - Collector Emitter Breakdown (Max):
- 35 V
- Vce Saturation (Max) @ Ib, Ic:
- 500mV @ 100mA, 3A
- Current - Collector Cutoff (Max):
- 100nA
- DC Current Gain (hFE) (Min) @ Ic, Vce:
- 300 @ 10mA, 2V
- Power - Max:
- 1.2 W
- Frequency - Transition:
- 100MHz
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-223-3
FZT789AQTA FAQ
1.How can I place an order for FZT789AQTA through Aetrix?
Please submit a Request for Quotation (RFQ) for FZT789AQTA 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 FZT789AQTA reliable?
The price and inventory of FZT789AQTA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for FZT789AQTA is usually 5 days.
3.What payment methods are accepted for FZT789AQTA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for FZT789AQTA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for FZT789AQTA?
FZT789AQTA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your FZT789AQTA 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 FZT789AQTA?
For technical support, including FZT789AQTA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your FZT789AQTA requirements.
6.How does Aetrix verify that FZT789AQTA is sourced from the original manufacturer or authorized distributors?
All FZT789AQTA 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 FZT789AQTA meets industry standards.
7.What is the process for return or replacement of FZT789AQTA?
All FZT789AQTA units undergo pre-shipment inspection (PSI). If there is an issue with FZT789AQTA, 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 FZT789AQTA part is unused and in its original packaging.
Return procedure for FZT789AQTA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
FZT789AQTA Tags
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