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Diodes Incorporated FZT751QTC
- Part No.:
- FZT751QTC
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Bipolar Transistors
- Package:
- TO-261-4, TO-261AA
- Datasheet:
-
FZT751QTC.pdf
- Description:
- TRANS PNP 60V 3A SOT-223-3
- Quantity:
- Payment:
- Shipping:
Inventory:5,501
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Product details
Overview
FZT751QTC from Diodes Incorporated is a 60V PNP medium-power bipolar junction transistor (BJT) in SOT223 package, rated for -3A continuous collector current and -60V VCEO, with VCE(sat) < -300 mV at -1 A. It is AEC-Q101 qualified and manufactured in IATF16949-certified facilities for automotive power switching applications including body control modules and lighting drivers.
For engineers reviewing the FZT751QTC datasheet, FZT751QTC pinout, FZT751QTC application, or FZT751QTC equivalent, key selection criteria include its -60 V VCEO, -3 A IC, low saturation voltage under high-current drive, thermal resistance of 41.7 °C/W on 50 mm × 50 mm copper, and AEC-Q101 qualification status for automotive-grade reliability.
Technical Context
This PNP BJT operates as a medium-power switch in linear or saturated mode, supporting DC and pulsed loads up to -6 A peak. Its complementary pairing with FZT651Q enables push-pull configurations, and its -7 V VEBO rating supports robust base drive margin in noisy automotive environments.
The device features a thermal resistance of 12.9 °C/W (junction-to-leads), enabling efficient heat transfer through the collector lead to PCB copper. Its fT of 100–140 MHz and <40 ns turn-on time support moderate-speed switching in load management circuits without requiring external snubbing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | -60 V - Withstands reverse collector-emitter voltage up to -60 V in blocking state, suitable for 48 V automotive systems with transient margin. |
| IC (continuous) | -3 A - Supports steady-state load currents up to 3 A, enabling direct drive of solenoids, relays, and LED arrays. |
| VCE(sat) | < -300 mV @ -1 A - Minimizes conduction loss and self-heating during saturation, reducing thermal stress in compact layouts. |
| RθJA | 41.7 °C/W - Achieved with 50 mm × 50 mm 2 oz copper; enables 3 W power dissipation at +25 °C ambient before exceeding 150 °C junction limit. |
| hFE | 80–170 @ -1 A - Provides predictable DC gain for stable base-current design in fixed-bias or Darlington driver stages. |
| fT | 100–140 MHz - Supports switching frequencies up to several MHz in PWM-controlled loads without significant gain roll-off. |
| ESD HBM | 4,000 V - Meets JEDEC Class 3A requirements, ensuring robustness against handling and board-level electrostatic events. |
Pinout & Package
Package: SOT223 (Type DN), surface-mount, 4-pin configuration with exposed collector tab for thermal and electrical connection. Molded green compound, UL 94V-0 rated, 0.112 g weight.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Collector (Tab) | Main current sink path | Exposed metal tab electrically connected to collector; must be soldered to ≥25 mm² copper for thermal performance and EMI shielding. |
| Emitter | Current source reference | Common return node for load current; tied to system ground or supply rail depending on high-side/low-side topology. |
| Base | Control input | Receives current-limited drive signal; requires ~100 mA base current to saturate at -1 A collector load. |
| Collector (Lead) | Secondary collector connection | Redundant collector terminal for mechanical stability and additional thermal conduction; electrically identical to tab. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive temperature range (-55 °C to +150 °C) and lifetime reliability per stress test protocols. |
| Low VCE(sat) | < -300 mV at -1 A ensures ≤300 mW conduction loss, reducing heatsink requirements in space-constrained ECUs. |
| Complementary NPN pairing | FZT651Q shares identical SOT223 footprint and thermal profile, enabling matched push-pull designs with minimal layout rework. |
| Green construction | Halogen- and antimony-free (<900 ppm Br/Cl, <1000 ppm Sb), compliant with automotive environmental directives and end-of-life recycling mandates. |
Applications
| Automotive Body Control Module | LED Headlamp Driver |
|---|---|
Use Scenario: Switching 12 V/24 V resistive and inductive loads such as door locks, window motors, and HVAC actuators. IC Role / Device Role / Timing Role: Medium-power PNP switch operating in saturation mode to sink load current to ground. Use Value: -60 V VCEO and -6 A ICM withstand load dump transients and inductive kickback without clamping diodes. |
Use Scenario: Constant-current dimming and on/off control of high-brightness LED strings in adaptive front lighting systems. IC Role / Device Role / Timing Role: Linear or PWM-controlled current sink regulating LED current via base drive modulation. Use Value: Tight hFE distribution (80–170 @ -1 A) enables accurate current setting with minimal base drive variance across production lots. |
| Engine Control Unit Fan Driver | Industrial PLC Output Stage |
Use Scenario: Driving brushed DC cooling fans in engine bays where ambient temperatures exceed +105 °C. IC Role / Device Role / Timing Role: High-reliability power switch interfacing microcontroller GPIO to fan motor via base resistor network. Use Value: -55 °C to +150 °C operating range and 4,000 V HBM ESD rating ensure uninterrupted operation in thermally aggressive, electrically noisy environments. |
Use Scenario: Solid-state replacement for electromechanical relays in programmable logic controller digital output modules. IC Role / Device Role / Timing Role: Load-switching transistor providing isolated, fast-turnoff capability for 24 V DC industrial sensors and actuators. Use Value: 450 ns turn-off time and 30 pF Cobo minimize switching noise and cross-talk in multi-channel I/O backplanes. |
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 |
|---|---|---|---|
| ON Semiconductor NSS60200PZ | VCEO = -60 V, IC = -2 A, RθJA = 62.5 °C/W (SOT223), no AEC-Q101 certification | Lacks automotive qualification; suitable only for commercial/industrial use with lower thermal demand | Select when AEC-Q101 is not required and cost sensitivity outweighs thermal performance needs. |
| STMicroelectronics STD18PF03L | VCEO = -30 V, IC = -18 A, TO-220 package, MOSFET-based, logic-level gate | Higher current but lower voltage rating; requires gate drive instead of base current; incompatible footprint | Choose only for high-current, low-voltage DC loads where PCB space allows TO-220 mounting and gate drive circuitry exists. |
Compared with NSS60200PZ and STD18PF03L, FZT751QTC delivers automotive-grade reliability, superior thermal performance on standard PCB copper, and drop-in compatibility with complementary FZT651Q in SOT223-making it optimal for space-constrained, thermally demanding automotive modules.
Availability
FZT751QTC is available at Aetrix Electronics and suitable for automotive body control modules, LED lighting drivers, and industrial PLC output stages requiring stable component supply, AEC-Q101 compliance, and consistent SOT223 thermal behavior.
Supply support for FZT751QTC 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.
FZT751QTC belongs to Diodes' automotive-qualified bipolar transistor product line, engineered specifically for high-reliability power switching in harsh-environment vehicle subsystems including chassis, comfort, and lighting control units.
FAQ
Is FZT751QTC pin-compatible with FZT651Q?
No-FZT751QTC is a PNP transistor while FZT651Q is its complementary NPN counterpart; they share identical SOT223 package dimensions and pinout orientation (C-E-B-tab), but polarity reversal means direct substitution is electrically invalid. Their matching layout enables push-pull or H-bridge designs when used together with proper biasing.
What is the maximum allowable PCB copper area for thermal derating?
The datasheet specifies two thermal test conditions: 25 mm × 25 mm (RθJA = 62.5 °C/W) and 50 mm × 50 mm (RθJA = 41.7 °C/W) 2 oz copper. No upper limit is defined; larger copper areas further reduce RθJA, but diminishing returns occur beyond ~75 mm × 75 mm due to convection limits in still air.
Does FZT751QTC require a base resistor in all applications?
Yes-base current must be externally limited to prevent damage. For -1 A collector current, typical hFE of 100 implies ~10 mA base drive; using a 1 kΩ resistor from 12 V yields ~11 mA, satisfying saturation while avoiding overdrive. Microcontroller GPIOs must never drive the base directly without series resistance.
Can FZT751QTC replace older FZT751 in non-automotive designs?
Yes-FZT751QTC is the qualified, green-compliant version of FZT751 with identical electrical specs, SOT223 footprint, and enhanced process controls. It meets RoHS 3, AEC-Q101, and IATF16949 requirements, making it a direct upgrade for legacy designs seeking improved reliability or regulatory compliance.
FZT751QTC 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):
- 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:
- 140MHz
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-223-3
FZT751QTC FAQ
1.How can I place an order for FZT751QTC through Aetrix?
Please submit a Request for Quotation (RFQ) for FZT751QTC 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 FZT751QTC reliable?
The price and inventory of FZT751QTC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for FZT751QTC is usually 5 days.
3.What payment methods are accepted for FZT751QTC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for FZT751QTC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for FZT751QTC?
FZT751QTC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your FZT751QTC 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 FZT751QTC?
For technical support, including FZT751QTC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your FZT751QTC requirements.
6.How does Aetrix verify that FZT751QTC is sourced from the original manufacturer or authorized distributors?
All FZT751QTC 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 FZT751QTC meets industry standards.
7.What is the process for return or replacement of FZT751QTC?
All FZT751QTC units undergo pre-shipment inspection (PSI). If there is an issue with FZT751QTC, 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 FZT751QTC part is unused and in its original packaging.
Return procedure for FZT751QTC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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