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Diodes Incorporated FZT651QTC
- Part No.:
- FZT651QTC
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Bipolar Transistors
- Package:
- TO-261-4, TO-261AA
- Datasheet:
-
FZT651QTC.pdf
- Description:
- TRANS NPN 60V 3A SOT-223-3
- Quantity:
- Payment:
- Shipping:
Inventory:7,942
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Product details
Overview
FZT651QTC from Diodes Incorporated is a 60V, 3A NPN medium-power bipolar junction transistor in SOT223 package, AEC-Q101 qualified for automotive applications. It delivers VCE(sat) ≤ 300 mV at 1 A, supports 6 A peak pulse current, and operates across –55°C to +150°C ambient range-used in engine control module load switching and body electronics power stages.
For engineers reviewing the FZT651QTC datasheet, FZT651QTC pinout, FZT651QTC application, or FZT651QTC equivalent, key selection criteria include guaranteed VCE(sat) performance at 1–3 A, thermal resistance (RθJA = 41.7°C/W on 50 mm × 50 mm copper), AEC-Q101 qualification status, and complementary PNP pairing with FZT751Q.
Technical Context
This NPN BJT is engineered for high-reliability automotive power switching where low saturation voltage and robust thermal performance are critical. Its BVCEO = 60 V and IC = 3 A continuous rating support 12 V/24 V system-level load drivers, while fT = 140–175 MHz enables fast switching in PWM-controlled solenoids and relays.
The device features a thermally optimized SOT223 (Type DN) package with RθJL = 12.9°C/W to collector lead, enabling efficient heat transfer to PCB copper. ESD ratings of 4 kV HBM and 400 V MM meet stringent automotive board-level robustness requirements without external protection.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | 60 V - Ensures safe operation in 24 V automotive systems with load dump transients up to 40 V. |
| IC (continuous) | 3 A - Supports sustained current in fuel injector drivers and HVAC blower motor controls. |
| VCE(sat) @ 1 A | ≤ 300 mV - Minimizes conduction loss and self-heating in high-duty-cycle switching. |
| hFE @ 1 A | 40–80 - Enables stable base drive design with 10–20 mA IB for 1–2 A collector loads. |
| fT | 140–175 MHz - Allows clean turn-on/turn-off in 20–50 kHz PWM applications like LED matrix dimming. |
| RθJA (50 mm × 50 mm) | 41.7°C/W - Permits 3 W dissipation at ≤ 85°C ambient with standard FR4 layout. |
| AEC-Q101 Qualified | Yes - Validated for automotive under temperature cycling, HTRB, and ESD stress per JESD47. |
Pinout & Package
Package: SOT223 (Type DN), surface-mount, 4-terminal configuration with collector-connected tab for thermal and electrical continuity. Molded green compound, matte tin-plated leads, UL 94V-0 rated.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Emitter (E) | Current sink terminal | Connected to ground or low-side return path; requires low-inductance routing for fast switching. |
| Base (B) | Control input | Driven by MCU GPIO or driver IC; 100 mA peak IB supports 3 A IC with hFE ≥ 30. |
| Collector (C) | Current source terminal | Connected to load and supply; tab is electrically tied to collector for enhanced thermal conduction. |
| Collector Tab (C) | Thermal & electrical node | Soldered to large copper pour; provides primary heat path and reduces RθJA by ~33% vs. 25 mm × 25 mm layout. |
Key Features
| Feature | Design Value |
|---|---|
| Low VCE(sat) at high current | 0.12 V typical @ 1 A - Reduces power loss to <120 mW, easing thermal design in space-constrained ECUs. |
| AEC-Q101 qualification | Full stress test suite passed - Eliminates need for customer requalification in Tier 1 automotive programs. |
| Complementary PNP pair | FZT751Q available - Enables matched push-pull output stages with consistent gain and saturation behavior. |
| Green, halogen-free construction | <900 ppm Br/Cl, <1000 ppm Sb - Meets automotive OEM material declarations (IMDS, CAMDS) without compliance overhead. |
| High ESD robustness | 4 kV HBM - Survives handling and assembly without gate protection diodes in downstream circuits. |
Applications
| Engine Control Module (ECM) Injector Driver | Body Control Module (BCM) Power Relay |
|---|---|
Use Scenario: Switching 12 V fuel injectors with 2–5 ms pulse width and 10–20 Hz repetition rate. IC Role / Device Role / Timing Role: High-current NPN switch controlling injector coil current path to ground. Use Value: VCE(sat) ≤ 300 mV ensures <300 mW loss at 1 A, enabling compact heatsinkless design in sealed ECM housings. |
Use Scenario: Driving 24 V HVAC blower motor relays in passenger compartment modules. IC Role / Device Role / Timing Role: Low-side load switch activating relay coils with 300–500 mA hold current. Use Value: 6 A ICM withstands relay inrush (≥4× steady-state), preventing single-event failure during cold cranking. |
| LED Headlamp Matrix Dimming | Transmission Solenoid Control |
Use Scenario: PWM dimming of high-brightness LED strings in adaptive driving beam (ADB) systems. IC Role / Device Role / Timing Role: Fast-switching NPN transistor modulating LED current at 20–100 kHz. Use Value: fT ≥ 140 MHz ensures <50 ns rise/fall times, minimizing PWM distortion and color shift. |
Use Scenario: Controlling linear solenoids in 8-speed automatic transmission valve bodies. IC Role / Device Role / Timing Role: Precision current sink regulating solenoid force via analog or PWM current control. Use Value: hFE stability over –40°C to +150°C maintains closed-loop current accuracy without recalibration. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar NPN medium-power transistor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ON Semiconductor NSS60201MR6T1G | VCEO = 60 V, IC = 2 A, VCE(sat) = 0.25 V @ 1 A, SOT223, AEC-Q101 | Lower continuous current rating limits use in >2 A injector drivers; higher VCE(sat) increases thermal load. | Select when lower cost is prioritized and peak load current remains ≤2 A with margin. |
| Infineon BCP56-16TA | VCEO = 60 V, IC = 1 A, VCE(sat) = 0.5 V @ 0.5 A, SOT223, AEC-Q101 | Half the continuous current and higher saturation voltage reduce usable duty cycle in high-power loads. | Prefer only for low-current auxiliary functions (e.g., sensor biasing) where thermal budget is generous. |
Compared with NSS60201MR6T1G and BCP56-16TA, FZT651QTC delivers superior power handling (3 A vs. ≤2 A), lower conduction loss (0.12 V vs. ≥0.25 V), and broader thermal operating range (–55°C to +150°C), making it optimal for primary power switching in demanding automotive subsystems.
Availability
FZT651QTC is available at Aetrix Electronics and suitable for engine control modules, body control units, LED headlamp systems, and transmission control units requiring stable component supply across extended automotive production lifecycles.
Supply support for FZT651QTC 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.
The FZT651QTC belongs to Diodes' automotive-qualified power transistor product line, designed specifically for high-reliability 12 V/24 V vehicle subsystems requiring AEC-Q101 compliance, low-loss switching, and robust thermal performance.
FAQ
What is the maximum allowable junction temperature for FZT651QTC?
The absolute maximum junction temperature is +150°C, and the device is rated for continuous operation across –55°C to +150°C ambient. Derating begins at +25°C ambient per the RθJA = 41.7°C/W curve on 50 mm × 50 mm copper, allowing full 3 W dissipation up to +85°C ambient before linear derating applies.
Is FZT651QTC pin-compatible with FZT653Q or FZT655Q?
No-FZT651QTC uses SOT223 (Type DN) with emitter-base-collector-tab pinout, while FZT653Q and FZT655Q are in SOT89 packages with different terminal assignments and thermal characteristics. Direct substitution requires PCB layout revision and thermal validation.
Does FZT651QTC require a base resistor for MCU GPIO drive?
Yes-a series base resistor is required to limit IB and ensure proper saturation. For 3.3 V GPIO driving 1 A IC, a 22 Ω resistor yields ~100 mA IB (assuming VBE(sat) ≈ 0.9 V), satisfying hFE ≥ 10 requirement and avoiding GPIO overcurrent.
Can FZT651QTC be used in linear regulator pass transistor applications?
No-it is optimized for switching operation, not linear regulation. Its SOA curve shows limited safe operating area above 10 V VCE at >100 mA, and thermal impedance makes sustained linear operation impractical without oversized heatsinking beyond SOT223 capability.
FZT651QTC 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:
- NPN
- Current - Collector (Ic) (Max):
- 3 A
- Voltage - Collector Emitter Breakdown (Max):
- 60 V
- Vce Saturation (Max) @ Ib, Ic:
- 600mV @ 300mA, 3A
- Current - Collector Cutoff (Max):
- 100nA (ICBO)
- DC Current Gain (hFE) (Min) @ Ic, Vce:
- 100 @ 500mA, 2V
- Power - Max:
- 2 W
- Frequency - Transition:
- 175MHz
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-223-3
FZT651QTC FAQ
1.How can I place an order for FZT651QTC through Aetrix?
Please submit a Request for Quotation (RFQ) for FZT651QTC 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 FZT651QTC reliable?
The price and inventory of FZT651QTC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for FZT651QTC is usually 5 days.
3.What payment methods are accepted for FZT651QTC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for FZT651QTC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for FZT651QTC?
FZT651QTC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your FZT651QTC 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 FZT651QTC?
For technical support, including FZT651QTC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your FZT651QTC requirements.
6.How does Aetrix verify that FZT651QTC is sourced from the original manufacturer or authorized distributors?
All FZT651QTC 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 FZT651QTC meets industry standards.
7.What is the process for return or replacement of FZT651QTC?
All FZT651QTC units undergo pre-shipment inspection (PSI). If there is an issue with FZT651QTC, 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 FZT651QTC part is unused and in its original packaging.
Return procedure for FZT651QTC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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