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Diodes Incorporated BCV47TC
- Part No.:
- BCV47TC
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Bipolar Transistors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
BCV47TC.pdf
- Description:
- TRANS NPN DARL 60V 0.5A SOT-23-3
- Quantity:
- Payment:
- Shipping:
Inventory:19,698
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Product details
Overview
BCV47TC from NXP Semiconductors is an NPN silicon planar Darlington transistor in SOT23 package, rated for 60 V VCEO, 500 mA IC, and 1.0 V VCE(sat) at IC = 100 mA / IB = 0.1 mA. It delivers high DC current gain (hFE up to 20,000 at IC = 100 µA) and operates from −55 °C to +150 °C, used in low-power switching and signal amplification stages of industrial sensor interfaces and LED driver bias circuits.
For engineers reviewing the BCV47TC datasheet, BCV47TC pinout, BCV47TC application, or BCV47TC equivalent, key selection criteria include verified VCEO margin, Darlington saturation voltage under pulsed load conditions, thermal derating behavior at Tamb > 25 °C, and SOT23 terminal compatibility with automated placement equipment.
Technical Context
This Darlington pair integrates two NPN transistors monolithically to achieve high hFE while maintaining single-package simplicity. Its internal structure enables low base drive requirements - e.g., 0.1 mA IB suffices to switch 100 mA IC - and supports operation up to 170 MHz fT at IC = 50 mA, VCE = 5 V.
The device exhibits low Cobo (3.5 pF typical at VCB = 10 V), enabling stable performance in high-frequency switching nodes. Absolute maximum ratings are validated under pulsed conditions (300 µs width, ≤2% duty cycle), with thermal limits defined across full −55 °C to +150 °C junction range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | 60 V - supports switching loads up to 60 V DC without breakdown under open-emitter conditions |
| IC (continuous) | 500 mA - defines maximum steady-state collector current before thermal shutdown or degradation |
| VCE(sat) | 1.0 V @ IC=100 mA, IB=0.1 mA - determines power loss (100 mW) and heat generation in saturated on-state |
| hFE | 20,000 max @ IC=100 µA - enables ultra-low base drive current for microcontroller GPIO-driven switches |
| fT | 170 MHz typical @ IC=50 mA - sets upper limit for small-signal amplification bandwidth |
| Ptot | 330 mW @ Tamb=25 °C - constrains PCB copper area and heatsinking requirements in compact layouts |
Pinout & Package
SOT23-3 plastic surface-mount package with gull-wing leads; standardized footprint compatible with IPC-7351B SOIC-3 land pattern. Moisture sensitivity level (MSL) 1 per J-STD-020.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Emitter) | Emitter terminal of Darlington pair | Reference node for base drive return path; connects to ground or low-side load return |
| 2 (Base) | Input control terminal | Accepts low-current logic-level signal to enable high-current collector conduction |
| 3 (Collector) | Output current terminal | Switches load current between supply rail and emitter; requires external flyback protection for inductive loads |
Key Features
| Feature | Design Value |
|---|---|
| High VCEO rating | 60 V - allows direct interface with 48 V industrial bus systems without series resistors |
| Low VCE(sat) | 1.0 V - reduces conduction loss by >30% versus standard NPN transistors at same IC |
| Darlington hFE | Up to 20,000 - eliminates need for multi-stage base drive circuitry in space-constrained designs |
| Extended temperature range | −55 °C to +150 °C - qualified for under-hood automotive and industrial motor control environments |
Applications
| Industrial Sensor Signal Conditioning | LED Bias Control in Smart Lighting |
|---|---|
Use Scenario: Amplifying weak analog output from RTD or thermistor bridges in programmable logic controllers. IC Role / Device Role / Timing Role: Darlington amplifier stage providing high input impedance and gain stability over temperature. Use Value: Enables direct connection to 3.3 V MCU ADC inputs without op-amp buffering, reducing BOM count. | Use Scenario: Driving constant-current LED strings in DALI-compliant lighting modules. IC Role / Device Role / Timing Role: Low-side current switch controlling LED cathode path with PWM dimming capability. Use Value: Achieves <1.0 V dropout at 100 mA, preserving headroom for 2–3 LED stacks powered from 12 V rails. |
| Automotive Cabin Fan Speed Control | Low-Power Relay Driver Interface |
Use Scenario: Controlling brushed DC fan motors in HVAC subsystems using PWM from body control module. IC Role / Device Role / Timing Role: High-gain switching element replacing discrete BJT+resistor networks in fan driver ICs. Use Value: Reduces base drive current demand from 5 mA to 0.1 mA, easing MCU GPIO loading and EMI filtering. | Use Scenario: Activating 5 V/12 V electromagnetic relays in building automation panels. IC Role / Device Role / Timing Role: Interface transistor translating logic-level signals to relay coil drive levels. Use Value: Delivers 500 mA peak coil current with <1.5 V VBE(sat), ensuring reliable relay pull-in at cold start (−40 °C). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Darlington transistor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BCV48 | Complementary PNP Darlington; identical VCEO, IC, and package but opposite polarity | Used in high-side switching or complementary push-pull output stages | Select when sourcing current from supply rail rather than sinking to ground |
| FMMT38A | Higher VCEO (80 V), lower VCE(sat) (0.8 V), same SOT23-3 footprint and pinout | Preferred in 48 V telecom power management where higher breakdown margin is required | Choose for enhanced reliability in overvoltage-prone environments without layout change |
Compared with BCV47TC, BCV48 enables complementary high-side switching in dual-rail designs, while FMMT38A offers superior voltage margin and lower conduction loss - both retain SOT23-3 mechanical compatibility but differ in polarity or absolute rating headroom.
Availability
BCV47TC is available at Aetrix Electronics and suitable for industrial sensor interfaces, LED bias control, automotive cabin fan drivers, and low-power relay interfaces requiring stable component supply across extended temperature ranges.
Supply support for BCV47TC 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
NXP Semiconductors is a global semiconductor leader focused on secure connectivity solutions for automotive, industrial, and IoT applications.
The BCV47TC belongs to NXP's legacy bipolar transistor portfolio, designed specifically for cost-sensitive, high-reliability discrete switching and amplification in space-constrained industrial and automotive modules.
FAQ
What is the maximum continuous collector current for BCV47TC at 70°C ambient?
At Tamb = 70 °C, the maximum continuous collector current is derated to 375 mA. This value follows the linear thermal derating curve from 500 mA at 25 °C, based on the 330 mW Ptot rating and thermal resistance RθJA of 375 K/W for standard SOT23 mounting on 1-inch² FR4 copper.
Does BCV47TC require external base resistors when driven by a 3.3 V MCU GPIO?
Yes - a minimum 33 kΩ series base resistor is required to limit IB to ≤0.1 mA at 3.3 V, ensuring operation within the specified VCE(sat) test condition. Without it, excessive base current may cause localized heating and hFE degradation during sustained conduction.
Can BCV47TC replace BCV27 in existing designs?
No - BCV47TC has double the VCEO (60 V vs. 30 V) and higher hFE, but its higher VCE(sat) at high IC and different thermal profile may alter switching timing and power dissipation. Layout and drive circuit validation are required before substitution.
Is BCV47TC suitable for switching inductive loads like solenoids?
Yes, with proper external protection: a reverse-biased flyback diode must be placed across the solenoid terminals to clamp inductive kickback exceeding 60 V. The device's 60 V VCEO rating provides margin only if the diode clamps below that threshold during turn-off transients.
BCV47TC 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):
- -
- DC Current Gain (hFE) (Min) @ Ic, Vce:
- 10000 @ 100mA, 5V
- Power - Max:
- 330 mW
- Frequency - Transition:
- 170MHz
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
BCV47TC FAQ
1.How can I place an order for BCV47TC through Aetrix?
Please submit a Request for Quotation (RFQ) for BCV47TC 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 BCV47TC reliable?
The price and inventory of BCV47TC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BCV47TC is usually 5 days.
3.What payment methods are accepted for BCV47TC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BCV47TC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BCV47TC?
BCV47TC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BCV47TC 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 BCV47TC?
For technical support, including BCV47TC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BCV47TC requirements.
6.How does Aetrix verify that BCV47TC is sourced from the original manufacturer or authorized distributors?
All BCV47TC 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 BCV47TC meets industry standards.
7.What is the process for return or replacement of BCV47TC?
All BCV47TC units undergo pre-shipment inspection (PSI). If there is an issue with BCV47TC, 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 BCV47TC part is unused and in its original packaging.
Return procedure for BCV47TC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BCV47TC Tags
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