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Diodes Incorporated BCV27TC
- Part No.:
- BCV27TC
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Bipolar Transistors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
BCV27TC.pdf
- Description:
- TRANS NPN DARL 30V 0.5A SOT-23-3
- Quantity:
- Payment:
- Shipping:
Inventory:2,840
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Product details
Overview
BCV27TC from ON Semiconductor is an NPN silicon planar Darlington transistor in SOT-23 package, rated for VCEO = 30 V, IC = 500 mA, and VCE(sat) = 1.0 V at IC = 100 mA / IB = 0.1 mA. It delivers high DC current gain (hFE ≥ 4000 at IC = 100 µA) and low saturation voltage for efficient switching in low-voltage load control circuits.
For engineers reviewing the BCV27TC datasheet, BCV27TC pinout, BCV27TC application, or BCV27TC equivalent, key selection criteria include verified Darlington configuration, SOT-23 terminal assignment (C-B-E), guaranteed VCEO margin, pulsed ICM capability, and thermal performance up to +150°C junction temperature.
Technical Context
This device implements a monolithic Darlington pair with integrated base-emitter resistor network absent - external base drive is required. Its high hFE enables microampere-level base current control of 100+ mA collector loads, while VCE(sat) ≤ 1.0 V minimizes conduction loss in battery-powered switches.
Designed for DC-coupled amplification and medium-speed switching (fT = 170 MHz typical), it operates reliably across –55°C to +150°C with validated breakdown margins: V(BR)CBO = 40 V, V(BR)CEO = 30 V, and V(BR)EBO = 10 V under specified test conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | 30 V - Maximum safe collector-emitter voltage before avalanche in open-base condition |
| IC | 500 mA continuous - Sustained load current capability without derating at Tamb = 25°C |
| VCE(sat) | 1.0 V @ IC = 100 mA, IB = 0.1 mA - Low on-state voltage drop enabling <100 mW dissipation in switching mode |
| hFE | ≥4000 @ IC = 100 µA - High DC current gain allows ultra-low base drive current |
| fT | 170 MHz typical @ IC = 50 mA - Supports signal amplification up to VHF band edge |
| Ptot | 330 mW @ Tamb = 25°C - Thermal limit defining maximum power handling before junction overheating |
Pinout & Package
SOT-23 plastic surface-mount package with standard 3-pin footprint (lead pitch 0.95 mm, body size 2.9 × 1.3 × 1.0 mm). Moisture sensitivity level (MSL) not specified in source data; handling per standard JEDEC J-STD-020 guidelines.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Emitter) | Emitting terminal of Darlington pair | Reference node for base drive; connects to load return path in high-side switch configurations |
| 2 (Base) | Control input for Darlington pair | Receives low-current drive signal; no internal bias resistor - external RB required for turn-on/turn-off control |
| 3 (Collector) | Output current terminal | Connects to load supply rail; carries full switched load current with minimal VCE(sat) loss |
Key Features
| Feature | Design Value |
|---|---|
| Darlington topology | Monolithic NPN-NPN pair delivering hFE > 4000 at µA-level base currents |
| Low VCE(sat) | 1.0 V max ensures <100 mW conduction loss at 100 mA load current |
| High VCEO rating | 30 V supports 24 V industrial bus and 12 V automotive applications with safety margin |
| Extended temperature range | –55°C to +150°C operation validated for under-hood and industrial control environments |
Applications
| LED Driver Circuit | Relay Driver Module |
|---|---|
Use Scenario: Driving high-brightness white LEDs from 5–12 V supply with PWM dimming. IC Role / Device Role / Timing Role: Switching element controlling LED current path; operates in saturated on/off states. Use Value: VCE(sat) ≤ 1.0 V reduces power loss and thermal stress on PCB, enabling compact layout without heatsink. | Use Scenario: Activating 12 V electromagnetic relays in PLC output modules. IC Role / Device Role / Timing Role: Medium-current interface between microcontroller GPIO and relay coil. Use Value: hFE ≥ 4000 allows direct drive from 3.3 V MCU pins with series base resistor only - no level-shifting needed. |
| Thermal Sensor Interface | Industrial Fan Control |
Use Scenario: Amplifying low-level current from platinum RTD sensor bridges. IC Role / Device Role / Timing Role: DC-coupled current amplifier stage with stable hFE over temperature. Use Value: Validated operation to +150°C permits placement near heat sources without gain drift or failure. | Use Scenario: Controlling 24 V DC cooling fans in motor drives and power supplies. IC Role / Device Role / Timing Role: Load switch managing fan enable/disable with fast turn-on/turn-off response. Use Value: fT = 170 MHz ensures clean switching edges even with long PCB traces, reducing EMI risk. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Darlington transistor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BCV28TC | Complementary PNP Darlington; same package, mirrored polarity and ratings (VCEO = –30 V, IC = –500 mA) | Used in complementary push-pull output stages or high-side switching where sourcing current is required | Select when circuit requires PNP counterpart for bidirectional control or level inversion |
| FMMT38A | Higher VCEO = 40 V, same SOT-23, hFE = 100–800 (standard gain binning vs. BCV27's high-gain bin) | Better suited for 36 V nominal systems; lower hFE demands higher base drive but improves stability in linear regions | Choose for higher voltage margin or where predictable mid-range hFE simplifies bias design |
Compared with BCV27TC, BCV28TC provides matched complementary behavior for dual-rail designs, while FMMT38A trades guaranteed high hFE for broader VCEO headroom and standardized gain distribution - critical for production consistency in 24–36 V industrial controls.
Availability
BCV27TC is available at Aetrix Electronics and suitable for LED driver circuits, relay interfaces, thermal sensor amplifiers, and industrial fan control requiring stable component supply across extended temperature ranges.
Supply support for BCV27TC 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
ON Semiconductor is a global semiconductor supplier focused on energy-efficient electronics, delivering power management, analog, sensors, and logic solutions for automotive, industrial, and cloud infrastructure markets.
BCV27TC belongs to ON Semiconductor's general-purpose bipolar transistor product line, engineered for reliable discrete switching and amplification in cost-sensitive, thermally demanding applications where Darlington gain and low saturation voltage are essential.
FAQ
Is BCV27TC pin-compatible with BCV28TC?
No. BCV27TC (NPN) and BCV28TC (PNP) share the SOT-23 package and pinout order (E-B-C), but their polarity and biasing requirements are opposite. Swapping them without circuit revision causes functional failure - BCV28TC requires reversed supply and base drive polarity.
What is the maximum pulsed collector current for BCV27TC?
The absolute maximum pulsed collector current (ICM) is 800 mA, measured under pulsed conditions: pulse width = 300 µs, duty cycle ≤ 2%. This rating applies only with adequate thermal management and is not sustainable in DC operation.
Does BCV27TC include an integrated base-emitter resistor?
No. BCV27TC is a bare Darlington transistor without internal bias resistors. External base resistor selection is required to set operating point - typical values range from 10 kΩ to 100 kΩ depending on drive voltage and desired collector current.
Can BCV27TC replace BCV47 in a 60 V circuit?
No. BCV27TC has VCEO = 30 V and V(BR)CBO = 40 V, making it unsuitable for 60 V applications. BCV47 offers VCEO = 60 V and V(BR)CBO = 80 V - use BCV47 or equivalent for circuits exceeding 30 V collector-emitter stress.
BCV27TC 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:
- Obsolete
- Transistor Type:
- NPN - Darlington
- Current - Collector (Ic) (Max):
- 500 mA
- Voltage - Collector Emitter Breakdown (Max):
- 30 V
- Vce Saturation (Max) @ Ib, Ic:
- 1V @ 100µA, 100mA
- Current - Collector Cutoff (Max):
- 100nA (ICBO)
- DC Current Gain (hFE) (Min) @ Ic, Vce:
- 20000 @ 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
BCV27TC FAQ
1.How can I place an order for BCV27TC through Aetrix?
Please submit a Request for Quotation (RFQ) for BCV27TC 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 BCV27TC reliable?
The price and inventory of BCV27TC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BCV27TC is usually 5 days.
3.What payment methods are accepted for BCV27TC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BCV27TC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BCV27TC?
BCV27TC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BCV27TC 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 BCV27TC?
For technical support, including BCV27TC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BCV27TC requirements.
6.How does Aetrix verify that BCV27TC is sourced from the original manufacturer or authorized distributors?
All BCV27TC 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 BCV27TC meets industry standards.
7.What is the process for return or replacement of BCV27TC?
All BCV27TC units undergo pre-shipment inspection (PSI). If there is an issue with BCV27TC, 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 BCV27TC part is unused and in its original packaging.
Return procedure for BCV27TC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BCV27TC Tags
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