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Diodes Incorporated FZT788BTC
- Part No.:
- FZT788BTC
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Bipolar Transistors
- Package:
- TO-261-4, TO-261AA
- Datasheet:
-
FZT788BTC.pdf
- Description:
- TRANS PNP 15V 3A SOT-223-3
- Quantity:
- Payment:
- Shipping:
Inventory:7,147
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Product details
Overview
FZT788BTC from Diodes Incorporated is a 15V PNP medium-power high-gain transistor in SOT223 package, rated for -3A continuous collector current, with hFE > 300 at -2A and ultra-low RCE(sat) of 93mΩ at -3A. It serves as a high-efficiency switching or linear amplification device in battery-powered flash converters and automotive power control circuits.
For engineers reviewing the FZT788BTC datasheet, FZT788BTC pinout, FZT788BTC application, or FZT788BTC equivalent, key selection criteria include guaranteed BVCEO ≥ -15V, VCE(sat) ≤ -0.45V at -2A/-10mA drive, thermal resistance RθJA = 41.7°C/W on 50mm × 50mm 2oz copper, and AEC-Q101 qualification readiness for automotive-grade deployment.
Technical Context
This PNP bipolar junction transistor operates with emitter-grounded configuration and supports high-current switching up to -3A DC with low saturation voltage, enabling efficient power stage design in DC-DC converters and load switches. Its fT = 100MHz and Cibo = 225pF support moderate-frequency switching applications without excessive Miller effect.
The device features complementary pairing with FZT688B (NPN), shares identical SOT223 mechanical footprint and thermal performance, and is characterized under pulsed test conditions (≤300µs, ≤2% duty cycle) for hFE, VCE(sat), and switching times (ton = 35ns, toff = 400ns).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCBO / VCEO | -15V - Ensures safe operation in 12V automotive and industrial supply rails with margin against transients. |
| IC (continuous) | -3A - Supports high-side switch or driver stages delivering ≥3W dissipation with proper heatsinking. |
| hFE | 300–500 @ -2A - Enables low-base-drive current designs, reducing driver-stage component count and power loss. |
| VCE(sat) | -0.45V @ -2A/-10mA - Limits conduction loss to ≤0.9W at full load, critical for thermally constrained PCB layouts. |
| RθJA | 41.7°C/W - Requires ≥50mm × 50mm 2oz copper pad for full 3W PD derating to +125°C junction temperature. |
| fT | 100MHz - Permits stable operation in PWM frequencies up to ~10MHz with adequate gain margin. |
Pinout & Package
Package: SOT223 (Type DN), surface-mount, 4-pin outline with exposed collector tab (pin 3) for thermal and electrical connection. Molded green compound, UL 94V-0 rated, 0.112g weight.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 (Emitter) | Current sink terminal | Connected to load return path; requires low-impedance ground routing for stable biasing. |
| Pin 2 (Base) | Control input | Driven with negative current; 5mA base drive sufficient for full -2A switching at low VCE(sat). |
| Pin 3 (Collector) | Main current output | Exposed metal tab - must be soldered to large copper area for thermal management and low-inductance current return. |
| Pin 4 (Emitter) | Second emitter connection | Duplicate emitter bond wire; electrically tied to Pin 1 - used for enhanced current sharing and thermal spreading. |
Key Features
| Feature | Design Value |
|---|---|
| High DC current gain | hFE ≥ 300 at -2A ensures minimal base drive circuitry and reduced gate-driver loading in hybrid configurations. |
| Ultra-low saturation resistance | RCE(sat) = 93mΩ at -3A enables <1W conduction loss in compact 12V/3A switching nodes. |
| Thermally optimized package | SOT223 with exposed collector tab delivers RθJL = 12.9°C/W - superior to TO-220 for space-constrained board-level thermal design. |
| AEC-Q101 readiness | Manufactured in IATF 16949 facilities with PPAP capability - supports automotive qualification pathways without redesign. |
Applications
| Flash Gun Converters | Battery-Powered Circuits |
|---|---|
Use Scenario: High-current DC-DC boost converter powering xenon flash tubes in portable cameras and medical imaging devices. IC Role / Device Role / Timing Role: PNP high-side switch controlling energy discharge into primary winding of step-up transformer. Use Value: Low VCE(sat) minimizes heat generation during repetitive 3A pulse bursts, extending battery life and preventing thermal shutdown. | Use Scenario: Reverse-polarity protection and load switching in handheld test equipment powered by Li-ion packs. IC Role / Device Role / Timing Role: PNP pass transistor in active OR-ing or hot-swap controller front-end. Use Value: High hFE allows direct MCU GPIO drive without external buffer, reducing BOM count and PCB area. |
| Automotive Interior Lighting | Industrial Sensor Power Management |
Use Scenario: Dimmable LED driver for map lights and courtesy lamps in 12V vehicle systems. IC Role / Device Role / Timing Role: Linear current regulator modulated via PWM base drive to set average LED current. Use Value: Tight hFE distribution (300–500) ensures consistent brightness across production units without per-unit calibration. | Use Scenario: Power sequencing and enable control for analog sensor sub-systems in factory automation modules. IC Role / Device Role / Timing Role: High-reliability enable switch isolating downstream LDOs and ADC reference circuits. Use Value: ESD HBM rating of 4kV protects against handling damage during manual assembly and field maintenance. |
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 |
|---|---|---|---|
| ZXTN25050DFH | Higher VCEO (-50V), lower hFE (100–200), SOT223-3 (no dual emitter) | Better for 24V+ industrial supplies; less suitable for low-drive, high-gain linear regulation | Select when higher breakdown margin is required over gain and saturation performance. |
| MJD2955T4G | TO-220 package, higher PD (115W), slower switching (toff ≈ 1.5µs) | Preferred for high-power linear regulators or legacy through-hole designs requiring mechanical robustness | Choose only when thermal mass and mounting flexibility outweigh PCB space and switching speed constraints. |
Compared with ZXTN25050DFH and MJD2955T4G, FZT788BTC offers optimal balance of gain, saturation voltage, and thermal efficiency in SOT223 - making it preferred for space-limited, battery-sensitive, and automotive-adjacent applications where drive simplicity and low conduction loss are prioritized.
Availability
FZT788BTC is available at Aetrix Electronics and suitable for flash gun converters, battery-powered portable instruments, and automotive interior lighting systems requiring stable component supply and long-term manufacturing continuity.
Supply support for FZT788BTC 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 the Americas.
FZT788BTC belongs to Diodes' FZT series of high-performance bipolar transistors, engineered specifically for medium-power switching and linear applications in automotive, industrial, and consumer power management systems.
FAQ
What is the maximum continuous collector current rating for FZT788BTC?
The FZT788BTC is rated for -3A continuous collector current at TA = +25°C with appropriate PCB copper area (50mm × 50mm 2oz). Derating applies above +25°C ambient: power dissipation drops linearly to zero at +150°C junction temperature, per the published RθJA = 41.7°C/W curve.
Is FZT788BTC qualified for automotive use?
FZT788BTC is manufactured in IATF 16949-certified facilities and supports PPAP documentation. While not pre-qualified to AEC-Q101, Diodes provides change control and qualification support upon request - enabling seamless integration into automotive programs requiring AEC-compliant components.
How does the dual-emitter configuration (Pins 1 and 4) affect PCB layout?
Pins 1 and 4 are internally shorted emitters. Both must be connected to the same low-impedance ground net. Routing them separately introduces imbalance and increases parasitic inductance - degrading switching performance and thermal uniformity. Use a single wide copper pour connecting both pins directly to the main ground plane.
What is the recommended minimum base drive current for full saturation at -2A collector current?
Per datasheet, VCE(sat) ≤ -0.45V is guaranteed at IC = -2A with IB = -10mA. For reliable saturation across process and temperature variation, apply ≥ -12mA base current using a 470Ω resistor from a -5V logic source or equivalent active driver - ensuring hFE margin remains above 167 under worst-case conditions.
FZT788BTC Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- TO-261-4, TO-261AA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Transistor Type:
- PNP
- Current - Collector (Ic) (Max):
- 3 A
- Voltage - Collector Emitter Breakdown (Max):
- 15 V
- Vce Saturation (Max) @ Ib, Ic:
- 500mV @ 50mA, 3A
- Current - Collector Cutoff (Max):
- 100nA (ICBO)
- DC Current Gain (hFE) (Min) @ Ic, Vce:
- 500 @ 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
FZT788BTC FAQ
1.How can I place an order for FZT788BTC through Aetrix?
Please submit a Request for Quotation (RFQ) for FZT788BTC 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 FZT788BTC reliable?
The price and inventory of FZT788BTC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for FZT788BTC is usually 5 days.
3.What payment methods are accepted for FZT788BTC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for FZT788BTC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for FZT788BTC?
FZT788BTC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your FZT788BTC 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 FZT788BTC?
For technical support, including FZT788BTC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your FZT788BTC requirements.
6.How does Aetrix verify that FZT788BTC is sourced from the original manufacturer or authorized distributors?
All FZT788BTC 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 FZT788BTC meets industry standards.
7.What is the process for return or replacement of FZT788BTC?
All FZT788BTC units undergo pre-shipment inspection (PSI). If there is an issue with FZT788BTC, 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 FZT788BTC part is unused and in its original packaging.
Return procedure for FZT788BTC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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