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Diodes Incorporated FZT790ATC
- Part No.:
- FZT790ATC
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Bipolar Transistors
- Package:
- TO-261-4, TO-261AA
- Datasheet:
-
FZT790ATC.pdf
- Description:
- TRANS PNP 40V 3A SOT-223-3
- Quantity:
- Payment:
- Shipping:
Inventory:4,000
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Product details
Overview
FZT790ATC from Diodes Incorporated is a 40V PNP medium-power transistor in SOT223 package, rated for -3A continuous collector current and -6A peak pulse current, with VCE(sat) of 0.15V at -500mA/-5mA drive, hFE = 200 at -1A, and RCE(sat) = 125mΩ - used as a high-current switch in DC-DC converter output stages and siren drivers.
For engineers reviewing the FZT790ATC datasheet, FZT790ATC pinout, FZT790ATC application, or FZT790ATC equivalent, key selection criteria include verified PNP saturation voltage at ≥2A load, thermal resistance to ambient (41.7°C/W on 50mm×50mm 2oz Cu), complementary pairing with FZT690B, and AEC-Q101 readiness for automotive-grade power switching.
Technical Context
This PNP bipolar junction transistor operates in linear or saturated switching mode with guaranteed BVCEO ≥ −40V and VBE(sat) ≤ −1.0V at −1A/−10mA. Its fT = 100MHz supports fast turn-on/turn-off in pulse-driven loads.
Thermal design is defined by three RθJA values (41.7–104°C/W) depending on PCB copper area, and RθJL = 12.9°C/W enables direct lead-to-heatsink thermal path. ESD robustness includes 4kV HBM per JESD22-A114.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | −40V - ensures safe operation in 24V automotive and industrial supply rails with margin against transients. |
| IC (continuous) | −3A - supports sustained load switching in DC-DC output stages without forced cooling. |
| VCE(sat) | −0.15V @ −500mA/−5mA - minimizes conduction loss and self-heating in high-duty-cycle applications. |
| hFE | 200 @ −1A/−2V - provides stable current gain for predictable base drive sizing in discrete control circuits. |
| RθJA | 41.7°C/W (50mm×50mm 2oz Cu) - defines maximum power dissipation (3.0W) under standard board layout conditions. |
| fT | 100MHz - enables use in PWM frequencies up to several MHz with controlled switching transitions. |
| ESD HBM | 4,000V - meets IEC 61000-4-2 Level 3 immunity requirements for board-level handling and assembly. |
Pinout & Package
Package: SOT223 (Type DN), surface-mount, 3-terminal plastic molded case with exposed collector tab for thermal conduction and mechanical anchoring. Weight: 0.112g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Collector (Tab) | Main current sink terminal | Exposed metal tab serves as primary thermal path and must be soldered to ≥25mm² copper pour for rated power dissipation. |
| Emitter | Current source node | Connected to higher potential rail (e.g., input voltage); polarity defines PNP conduction direction. |
| Base | Control input | Receives negative current to forward-bias BE junction; requires current-limiting resistor for TTL/CMOS drive compatibility. |
Key Features
| Feature | Design Value |
|---|---|
| Low saturation voltage | VCE(sat) ≤ −0.25V at −2A ensures <0.5W conduction loss in 24V/2A load switching. |
| High DC current gain | hFE ≥ 200 at −1A enables low-base-drive-current control in discrete gate driver stages. |
| Complementary NPN pairing | FZT690B shares identical SOT223 footprint and matching gain/speed specs for push-pull designs. |
| Automotive-qualified option | AEC-Q101 qualified version available upon request - required for engine control, body electronics, and ADAS power stages. |
| Green material compliance | Halogen- and antimony-free molding compound (<900ppm Br/Cl, <1000ppm Sb) meets EU ELV and RoHS 3 standards. |
Applications
| DC-DC Converter Output Switch | Siren Driver Stage |
|---|---|
Use Scenario: High-current buck converter output stage delivering 2A at 12V in automotive infotainment power supplies. IC Role / Device Role / Timing Role: PNP high-side switch controlling inductor current return path during synchronous rectification phase. Use Value: Low VCE(sat) reduces conduction loss by >30% vs. generic PNP alternatives, improving efficiency from 88% to 91% at full load. |
Use Scenario: Loudspeaker driver in vehicle alarm systems requiring 3A pulsed current into 4Ω load. IC Role / Device Role / Timing Role: Medium-power audio amplifier output stage operating in Class B with fast turn-off (toff = 600ns). Use Value: 6A peak rating handles 100ms siren bursts without thermal derating; fT = 100MHz ensures clean square-wave reproduction up to 20kHz. |
| Industrial Motor Control Enable | LED String Current Regulator |
Use Scenario: Enable/disable function for 24V brushed DC motor in factory automation actuators. IC Role / Device Role / Timing Role: High-side current switch activated by microcontroller GPIO via base resistor network. Use Value: Guaranteed hFE ≥ 150 at −2A allows reliable saturation with ≤20mA base drive, reducing MCU port loading. |
Use Scenario: Constant-current sink for 3-series white LED string (9V forward drop) in emergency lighting modules. IC Role / Device Role / Timing Role: Linear current regulator using emitter resistor feedback and base bias setpoint. Use Value: Tight VBE(on) tolerance (±0.05V) enables ±3% LED current accuracy across temperature without trimming. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar PNP medium-power switching applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MJD2955T4G | Higher VCEO (−60V), lower hFE (20–70), larger TO-220 package | Requires heatsink above 1.5A; unsuitable for space-constrained SOT223 layouts | Select when higher breakdown voltage is critical and board area permits TO-220 mounting. |
| BC807-40,215 | SOT23 package, IC = −500mA, VCE(sat) = −0.7V @ −100mA - not a drop-in replacement | Limited to low-power logic-level switching; cannot handle >0.5A continuous loads | Use only in signal-level PNP roles where FZT790ATC's power capability is unnecessary. |
Compared with MJD2955T4G and BC807-40,215, FZT790ATC uniquely balances SOT223 footprint, −3A rating, and sub-0.25V saturation in a single package - making it optimal for compact, high-efficiency 24V industrial and automotive power switches.
Availability
FZT790ATC is available at Aetrix Electronics and suitable for DC-DC converters, siren drivers, and industrial motor control enable circuits requiring stable component supply and long-term production continuity.
Supply support for FZT790ATC 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 the Americas.
FZT790ATC belongs to Diodes' high-reliability power transistor product line, engineered specifically for ruggedized 12–48V power conversion and automotive-grade switching applications demanding consistent gain, low saturation, and thermal resilience.
FAQ
What is the maximum allowable junction temperature for FZT790ATC?
The absolute maximum junction temperature is +150°C, with storage temperature range also specified as −55°C to +150°C. Operation above +150°C risks permanent degradation of hFE and increased leakage; thermal design must ensure TJ remains below this limit under worst-case ambient and power dissipation conditions.
Is FZT790ATC pin-compatible with its complementary NPN device FZT690B?
Yes - both FZT790ATC (PNP) and FZT690B (NPN) use identical SOT223 (Type DN) packages with matching pin assignments: Collector (tab), Emitter, Base in same physical orientation. This enables direct layout reuse in push-pull, H-bridge, and complementary amplifier designs.
Does FZT790ATC require a heatsink in typical 2A DC operation?
No external heatsink is required when mounted on ≥25mm² of 2oz copper per JEDEC-standard layout; RθJA = 62.5°C/W at that condition yields ΔT = 125°C rise at 2A with VCE(sat) ≈ 0.4V (0.8W), keeping TJ ≤ 125°C at 25°C ambient. Larger copper areas further reduce thermal stress.
Can FZT790ATC be used in linear regulator applications?
Yes - its guaranteed hFE ≥ 150 at −2A and low VCE(sat) support stable linear operation as a pass transistor, but power dissipation must be limited to ≤1.2W (per minimum pad layout derating) and thermal design must account for continuous conduction losses, not just pulsed ratings.
FZT790ATC 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):
- 40 V
- Vce Saturation (Max) @ Ib, Ic:
- 750mV @ 50mA, 2A
- Current - Collector Cutoff (Max):
- 100nA (ICBO)
- DC Current Gain (hFE) (Min) @ Ic, Vce:
- 300 @ 10mA, 2V
- Power - Max:
- 2 W
- Frequency - Transition:
- 100MHz
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-223-3
FZT790ATC FAQ
1.How can I place an order for FZT790ATC through Aetrix?
Please submit a Request for Quotation (RFQ) for FZT790ATC 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 FZT790ATC reliable?
The price and inventory of FZT790ATC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for FZT790ATC is usually 5 days.
3.What payment methods are accepted for FZT790ATC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for FZT790ATC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for FZT790ATC?
FZT790ATC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your FZT790ATC 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 FZT790ATC?
For technical support, including FZT790ATC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your FZT790ATC requirements.
6.How does Aetrix verify that FZT790ATC is sourced from the original manufacturer or authorized distributors?
All FZT790ATC 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 FZT790ATC meets industry standards.
7.What is the process for return or replacement of FZT790ATC?
All FZT790ATC units undergo pre-shipment inspection (PSI). If there is an issue with FZT790ATC, 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 FZT790ATC part is unused and in its original packaging.
Return procedure for FZT790ATC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
FZT790ATC Tags
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