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Home > Products > Discrete Semiconductor Products > Transistors > Bipolar (BJT) > Single Bipolar Transistors

Diodes Incorporated BCV47TA

Name: BCV47TA
Brand: Diodes Incorporated
SKU: BCV47TA
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: BCV47TA

Manufacturer:: Diodes Incorporated

Category:: Single Bipolar Transistors

Package:: TO-236-3, SC-59, SOT-23-3

Datasheet:: BCV47TA.pdf

Description:: TRANS NPN DARL 60V 0.5A SOT-23-3

Quantity:: RFQ Add To RFQ list

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Inventory:15,865

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Product details

Overview

BCV47TA from Diodes Incorporated is an NPN silicon planar Darlington transistor in SOT23 package, rated for 60 V V_CEO, 500 mA I_C, and 330 mW P_tot, optimized for low-saturation switching in space-constrained load control circuits such as LED drivers and relay interfaces.

For engineers reviewing the BCV47TA datasheet, BCV47TA pinout, BCV47TA application, or BCV47TA equivalent, key selection criteria include verified V_CE(sat) ≤1.0 V at I_C=100 mA/I_B=0.1 mA, h_FE ≥2 k at I_C=500 mA, and guaranteed operation from −55 °C to +150 °C.

Technical Context

The BCV47TA integrates two cascaded NPN transistors in a monolithic Darlington configuration, delivering high DC current gain (h_FE up to 10 k at low I_C) while maintaining V_CE(sat) ≤1.0 V under pulsed 100 mA conditions. Its 80 V V_CBO rating supports robust voltage margin in inductive load switching.

Designed for surface-mount discrete switching, it operates with base-emitter turn-on threshold near 1.5 V and exhibits typical f_T = 170 MHz at I_C = 50 mA, enabling stable performance in medium-speed digital interface and analog amplification roles where gain stability across temperature is required.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	60 V - maximum safe collector-emitter voltage before breakdown in open-base condition
I_C	500 mA continuous - usable collector current limit without derating at T_amb = 25 °C
V_CE(sat)	≤1.0 V at I_C = 100 mA, I_B = 0.1 mA - ensures <1 V drop across switch during active conduction
h_FE	2 k min at I_C = 500 mA, V_CE = 5 V - enables direct microcontroller GPIO drive without external base amplifier
P_tot	330 mW at T_amb = 25 °C - defines thermal power budget for PCB layout and heatsinking requirements
f_T	170 MHz typical at I_C = 50 mA, V_CE = 5 V - supports reliable operation up to ~10–20 MHz switching frequencies

Pinout & Package

SOT23-3 plastic surface-mount package with gull-wing leads; standard pin assignment confirmed per Diodes Incorporated marking diagram: Pin 1 = Emitter, Pin 2 = Base, Pin 3 = Collector.

Pin/Terminal	Circuit Role	Design Meaning
Pin 1 (Emitter)	Current sink node	Reference terminal for base drive; connects to ground or low-side return path in common-emitter switches
Pin 2 (Base)	Control input	Receives current-limited drive signal; requires ≥0.1 mA to saturate at 100 mA collector load
Pin 3 (Collector)	High-side switched output	Connects to load supply rail; carries full load current when saturated

Key Features

Feature	Design Value
High V_CEO rating	60 V - allows use in 24 V industrial control systems with >100 % voltage headroom
Low V_CE(sat)	≤1.0 V - reduces conduction loss and self-heating in battery-powered load switching
Darlington gain structure	h_FE ≥2 k at 500 mA - eliminates need for multi-stage base drive circuitry
Extended temperature range	−55 °C to +150 °C - qualified for under-hood automotive and industrial motor control environments

Applications

LED Driver Circuits

Relay Driver Modules

Use Scenario: Driving high-brightness white LEDs from 5–24 V rails in automotive interior lighting.

IC Role / Device Role / Timing Role: Low-side constant-current switch controlled by MCU PWM output.

Use Value: V_CE(sat) ≤1.0 V minimizes voltage overhead, preserving >90 % of supply for LED forward drop.

Use Scenario: Activating 12 V/24 V electromagnetic relays in PLC I/O modules.

IC Role / Device Role / Timing Role: High-gain Darlington switch interfacing 3.3 V logic to inductive coil loads.

Use Value: h_FE ≥2 k at 500 mA enables direct GPIO drive without base resistor network redesign.

Small Motor Controllers

Industrial Sensor Interface

Use Scenario: Controlling brushed DC fan motors in HVAC control panels.

IC Role / Device Role / Timing Role: Pulse-width modulated load switch in half-bridge auxiliary stage.

Use Value: 60 V V_CEO withstands flyback spikes up to 48 V during motor commutation.

Use Scenario: Level-shifting and isolating analog sensor outputs in 4–20 mA transmitter designs.

IC Role / Device Role / Timing Role: Current-source buffer for precision current-loop drivers.

Use Value: Stable h_FE over −40 °C to +85 °C ensures consistent loop compliance across ambient conditions.

Equivalent & Alternatives

The following parts are listed as comparable options for similar Darlington transistor applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
BCV27TA	V_CEO = 30 V, V_CBO = 40 V - lower voltage margin than BCV47TA	Restricted to ≤12 V systems; unsuitable for 24 V relay or motor drives	Select only if operating voltage ≤15 V and board space constraints favor identical SOT23 footprint
ZTX851	h_FE = 100–800 (standard BJT), no Darlington gain; V_CE(sat) ≈ 0.25 V at same I_C/I_B	Requires higher base drive current; better for high-efficiency linear regulation	Prefer when low V_CE(sat) is critical but system can supply ≥1 mA base current

Compared with BCV27TA and ZTX851, BCV47TA uniquely balances high-voltage capability (60 V), Darlington-level gain (≥2 k at 500 mA), and SOT23 compactness-making it optimal for 24 V industrial switching where both voltage headroom and GPIO-compatible drive are required.

Availability

BCV47TA is available at Aetrix Electronics and suitable for LED driver circuits, relay driver modules, small motor controllers, and industrial sensor interface applications requiring stable component supply across extended temperature ranges.

Supply support for BCV47TA 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 and manufacturing operations across Asia and the Americas.

The BCV47TA belongs to Diodes' general-purpose bipolar transistor product line, engineered specifically for high-reliability, low-cost switching in space-constrained industrial and automotive subsystems.

FAQ

What is the maximum continuous collector current for BCV47TA?

The BCV47TA is rated for 500 mA continuous collector current at ambient temperature of 25 °C. Derating is required above this temperature: current must be reduced linearly to zero at 150 °C junction temperature, per its 330 mW total power dissipation limit and thermal resistance characteristics.

Is BCV47TA pin-compatible with BCV27TA?

Yes, BCV47TA and BCV27TA share identical SOT23-3 packaging and pinout (Emitter-Base-Collector on Pins 1–2–3). However, they differ electrically: BCV47TA offers 60 V V_CEO versus 30 V for BCV27TA, making them non-interchangeable in voltage-critical designs despite mechanical compatibility.

Does BCV47TA require a base resistor when driven by a 3.3 V microcontroller GPIO?

Yes-a series base resistor is mandatory. With V_BE(sat) ≈ 1.5 V and required I_B ≥ 0.1 mA for 100 mA I_C, a 10–22 kΩ resistor limits base current to safe levels while ensuring saturation. Omitting it risks excessive base current and device failure.

Can BCV47TA be used in linear amplification applications?

It is not recommended. The BCV47TA is characterized and qualified for switching operation, with specified parameters (e.g., h_FE min/max bands, V_CE(sat)) optimized for saturation. Its gain variation across I_C and temperature lacks the tight tolerances needed for precision analog amplification.

BCV47TA 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:: 330 mW

Frequency - Transition:: 170MHz

Operating Temperature:: -55°C ~ 150°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: SOT-23-3

BCV47TA FAQ

1.How can I place an order for BCV47TA through Aetrix?

Please submit a Request for Quotation (RFQ) for BCV47TA 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 BCV47TA reliable?

The price and inventory of BCV47TA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BCV47TA is usually 5 days.

3.What payment methods are accepted for BCV47TA?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BCV47TA transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for BCV47TA?

BCV47TA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your BCV47TA 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 BCV47TA?

For technical support, including BCV47TA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BCV47TA requirements.

6.How does Aetrix verify that BCV47TA is sourced from the original manufacturer or authorized distributors?

All BCV47TA 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 BCV47TA meets industry standards.

7.What is the process for return or replacement of BCV47TA?

All BCV47TA units undergo pre-shipment inspection (PSI). If there is an issue with BCV47TA, 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 BCV47TA part is unused and in its original packaging.

Return procedure for BCV47TA:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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