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Diodes Incorporated BCV47QTC
- Part No.:
- BCV47QTC
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Bipolar Transistors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
BCV47QTC.pdf
- Description:
- TRANS NPN DARL 60V 0.5A SOT-23-3
- Quantity:
- Payment:
- Shipping:
Inventory:10,000
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Product details
Overview
BCV47Q from Diodes Incorporated is a 60V NPN Darlington transistor in SOT23 package, designed for automotive-grade switching and amplification. It delivers hFE > 10,000 at 100mA, supports 500mA continuous collector current, and features 80V VCBO and AEC-Q101 qualification - used in body control modules for high-gain load driver stages.
For engineers reviewing the BCV47Q datasheet, BCV47Q pinout, BCV47Q application, or BCV47Q equivalent, key selection criteria include guaranteed high DC gain at high current, automotive-qualified thermal robustness (−55°C to +150°C), and SOT23 footprint compatibility with space-constrained PCB layouts.
Technical Context
This Darlington pair integrates two NPN transistors in cascade to achieve ultra-high current gain while maintaining single-base control. Its structure enables low base drive requirements for driving inductive loads such as solenoids and relays in 12V/24V automotive systems.
The device operates with VCE(sat) ≤ 1.0V at IC = 100mA/IB = 0.1mA and exhibits fT = 170MHz, supporting stable switching up to medium frequencies despite its high-gain architecture. Thermal resistance RθJA is 403°C/W on minimum pad layout, enabling operation up to 150°C junction temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCBO | 80 V - Withstands transient voltage spikes across collector-base without breakdown |
| VCEO | 60 V - Maximum safe collector-emitter voltage under open-base conditions |
| hFE | 2,000–10,000 - Enables microamp-level base drive to switch 500mA loads |
| IC (cont.) | 500 mA - Supports direct driving of automotive solenoids, fans, and LED arrays |
| VCE(sat) | ≤1.0 V @ IC=100mA/IB=0.1mA - Minimizes power loss and self-heating in saturated switching |
| TJ Range | −55°C to +150°C - Validated for under-hood automotive environments per AEC-Q101 |
| ESD HBM | 2,000 V - Robust handling during automated assembly and system integration |
Pinout & Package
Package: SOT23 - Surface-mount plastic package with 3-pin configuration, 0.008g mass, UL 94V-0 rated molding compound, and matte tin-plated leads solderable per MIL-STD-202.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| E (Emitter) | Current sink output terminal | Connected to ground or low-side return path; carries full load current |
| B (Base) | Control input node | Receives low-current drive signal; controls Darlington conduction state |
| C (Collector) | High-side current input | Connected to positive rail or inductive load; handles switched load current |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive use including temperature cycling, mechanical shock, and ESD stress |
| hFE > 10k @ 100mA | Reduces MCU GPIO current burden and eliminates need for pre-driver stages |
| 60V VCEO rating | Supports 24V commercial vehicle systems with margin against load dump transients |
| SOT23 footprint | Enables compact placement in multi-channel driver IC replacements or discrete upgrades |
| Lead-free & halogen-free | Complies with RoHS 3 and automotive green material standards (Br+Cl <1500ppm) |
Applications
| Automotive Body Control Module | Industrial Relay Driver |
|---|---|
Use Scenario: Driving door lock actuators and window lift motors in 12V vehicle architectures. IC Role / Device Role / Timing Role: High-gain NPN Darlington switch providing low-impedance path between battery rail and inductive load. Use Value: Eliminates need for external base resistors or driver ICs due to guaranteed hFE ≥2,000 at 100µA IB. | Use Scenario: Replacing electromechanical relays in PLC I/O modules for 24V DC outputs. IC Role / Device Role / Timing Role: Solid-state load switch with fast turn-on/turn-off and no contact bounce. Use Value: Achieves <1.0V saturation voltage at 100mA, reducing heat generation vs. standard BJT alternatives. |
| LED Lighting Array Driver | Smart Sensor Power Switch |
Use Scenario: Controlling multi-segment automotive LED headlamp or DRL strings. IC Role / Device Role / Timing Role: Constant-current switch enabling PWM dimming with minimal base drive overhead. Use Value: Maintains stable hFE across −55°C to +100°C, ensuring consistent brightness in cold-start and hot-soak conditions. | Use Scenario: Enabling/disabling power to MEMS pressure or inertial sensors in ADAS ECUs. IC Role / Device Role / Timing Role: Low-leakage, high-isolation power gate with <100nA ICBO at 150°C. Use Value: Prevents sensor bias drift during sleep mode via guaranteed emitter-base cutoff below 1nA at 4V. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Darlington transistor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BCV46Q | Complementary PNP Darlington; same package, matching hFE and VCEO specs | Used in push-pull or H-bridge configurations requiring matched NPN/PNP pairs | Select when designing bidirectional current control or complementary switching topologies |
| ZTX1048 | Higher VCEO (80V), lower hFE (min 500), TO-92 package instead of SOT23 | Preferred in non-automotive industrial controls where board space is less constrained | Choose only if higher voltage margin is critical and SOT23 footprint is not required |
Compared with BCV46Q, the BCV47Q provides identical automotive qualification and gain but serves NPN-side switching; versus ZTX1048, it trades off voltage headroom for AEC-Q101 compliance, smaller size, and guaranteed high hFE in surface-mount form.
Availability
BCV47Q is available at Aetrix Electronics and suitable for automotive body electronics, industrial relay replacement, LED lighting control, and smart sensor power gating requiring stable component supply and long-term lifecycle support.
Supply support for BCV47Q 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.
The BCV47Q belongs to Diodes' automotive-qualified discrete transistor product line, engineered specifically for high-reliability, high-gain switching in harsh-environment electronic control units.
FAQ
Is BCV47Q pin-compatible with standard SOT23 NPN transistors like BC847?
No. While both use SOT23 packaging, BCV47Q is a Darlington pair with significantly higher hFE and VCE(sat), and its internal structure requires different biasing. Pin assignments match SOT23 outline (E-B-C), but electrical behavior differs fundamentally - direct substitution may cause unintended saturation or thermal runaway.
What is the maximum allowable base current for continuous operation?
The absolute maximum base current is 100mA, but for reliable long-term operation, IB should be limited to ≤1mA under typical switching conditions. At IC = 500mA, recommended IB is 5–10mA to ensure full saturation while avoiding excessive base power dissipation in the Darlington's input stage.
Does BCV47Q require a base resistor when driven by a 3.3V MCU GPIO?
Yes. A series base resistor is mandatory to limit IB and prevent damage. For 3.3V drive into 0.7V VBE(sat), a 2.2kΩ resistor limits IB to ~1.1mA - sufficient for switching up to ~100mA loads. Higher currents require proportionally lower resistance, but must stay within IB(max) = 100mA and thermal limits.
How does BCV47Q perform in PWM-driven inductive loads?
It supports PWM frequencies up to ~10kHz with acceptable switching losses, thanks to fT = 170MHz and low stored charge. However, flyback diode protection is essential - VCEO derates under inductive kickback, and unclamped voltage spikes exceeding 60V will cause failure. Use a 1N4148 or Schottky clamp across the load.
BCV47QTC Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Transistor Type:
- NPN - Darlington
- Current - Collector (Ic) (Max):
- 500 mA
- Voltage - Collector Emitter Breakdown (Max):
- 60 V
- Vce Saturation (Max) @ Ib, Ic:
- 1V @ 100µA, 100mA
- Current - Collector Cutoff (Max):
- 100nA (ICBO)
- DC Current Gain (hFE) (Min) @ Ic, Vce:
- 10000 @ 100mA, 5V
- Power - Max:
- 310 mW
- Frequency - Transition:
- 170MHz
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
BCV47QTC FAQ
1.How can I place an order for BCV47QTC through Aetrix?
Please submit a Request for Quotation (RFQ) for BCV47QTC 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 BCV47QTC reliable?
The price and inventory of BCV47QTC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BCV47QTC is usually 5 days.
3.What payment methods are accepted for BCV47QTC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BCV47QTC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BCV47QTC?
BCV47QTC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BCV47QTC 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 BCV47QTC?
For technical support, including BCV47QTC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BCV47QTC requirements.
6.How does Aetrix verify that BCV47QTC is sourced from the original manufacturer or authorized distributors?
All BCV47QTC 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 BCV47QTC meets industry standards.
7.What is the process for return or replacement of BCV47QTC?
All BCV47QTC units undergo pre-shipment inspection (PSI). If there is an issue with BCV47QTC, 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 BCV47QTC part is unused and in its original packaging.
Return procedure for BCV47QTC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BCV47QTC Tags
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