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

onsemi BCP68T1

Name: BCP68T1
Brand: onsemi
SKU: BCP68T1
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: BCP68T1

Manufacturer:: onsemi

Category:: Single Bipolar Transistors

Package:: -

Datasheet:: BCP68T1.pdf

Description:: TRANS NPN AUDIO 1A 25V SOT223

Quantity:: RFQ Add To RFQ list

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Inventory:8,766

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Product details

Overview

BCP68T1 from onsemi is an NPN silicon epitaxial transistor in SOT-223 package, rated for 20 V_CEO, 1.0 A continuous collector current, and 1.5 W power dissipation at T_A = 25°C; designed for low-voltage, high-current switching in automotive and industrial power control circuits.

For engineers reviewing the BCP68T1 datasheet, pinout, applications, or equivalent options, key selection criteria include V_CEO = 20 V, I_C = 1.0 A, h_FE = 50–375 (depending on bias), V_CE(sat) ≤ 0.5 V at I_C/I_B = 10, and AEC-Q101 qualification for automotive use.

Technical Context

This medium-power surface-mount transistor operates as a general-purpose NPN switch with DC current gain spanning 50 to 375 across collector current range (5 mA to 1 A) and junction temperature (−55°C to 125°C). Its f_T = 60 MHz enables moderate-frequency switching up to ~10–20 MHz in optimized layouts.

The device features low saturation voltage (V_CE(sat) ≤ 0.5 V at I_C = 1.0 A, I_B = 100 mA) and robust thermal performance (R_JA = 83.3°C/W on standard FR-4 PCB), supported by SOT-223's thermally enhanced leadframe design with collector-connected pins 2 and 4.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	20 V - Maximum safe collector-emitter voltage before breakdown under open-base conditions
I_C (continuous)	1.0 A - Continuous collector current rating at T_A = 25°C with derating above 25°C
V_CE(sat)	≤ 0.5 V - Ensures low conduction loss when fully saturated at I_C = 1.0 A, I_B = 100 mA
h_FE	50–375 - Wide DC current gain range supports flexible base drive design across load currents
f_T	60 MHz - Enables reliable switching in PWM drivers and signal amplification up to ~10 MHz
R_JA	83.3°C/W - Thermal resistance defines required PCB copper area for thermal management
AEC-Q101	Qualified - Meets stress test requirements for automotive electronics reliability and lifetime validation

Pinout & Package

The BCP68T1 is housed in the SOT-223 package (Case 318E, Style 1), featuring a thermally enhanced leadframe with collector connected to both pins 2 and 4 for improved heat dissipation and mechanical stability.

Pin/Terminal	Circuit Role	Design Meaning
Pin 1	Base	Control input terminal; requires current-limited drive to achieve target I_C and saturation
Pin 2	Collector	Main power output terminal; electrically tied to Pin 4 for parallel current handling and thermal spreading
Pin 3	Emitter	Common return path; connects to ground or low-side reference in switching configurations
Pin 4	Collector	Second collector connection; enhances thermal conduction and reduces effective R_DS(on)-like resistance

Key Features

Feature	Design Value
High-current capability	1.0 A continuous I_C with 3.0 A peak rating supports motor drivers and solenoid controls
SOT-223 thermal design	Formed leads absorb soldering thermal stress; large collector pad improves heat transfer to PCB
AEC-Q101 qualification	Validated for automotive applications including body control modules and lighting drivers
Complementary PNP pair	BCP69T1 provides matched characteristics for push-pull and H-bridge topologies
Pb-free, RoHS-compliant	Halogen-free/BFR-free construction meets global environmental compliance requirements

Applications

Automotive LED Headlamp Driver	Industrial DC Motor Control
Use Scenario: Switching high-intensity LED arrays in automotive headlamps requiring precise current regulation and thermal resilience. IC Role / Device Role / Timing Role: NPN power switch controlling LED current path in constant-current buck or linear driver stages. Use Value: V_CE(sat) ≤ 0.5 V minimizes power loss at 1 A, while AEC-Q101 qualification ensures reliability over vehicle lifetime.	Use Scenario: Driving brushed DC motors in factory automation systems where compact size and thermal robustness are critical. IC Role / Device Role / Timing Role: Low-side switch in half-bridge or single-ended motor driver circuits. Use Value: SOT-223 package enables direct PCB heatsinking; 1.0 A rating supports motors up to ~24 V/20 W without external heatsink.
Power Supply OR-ing Circuit	Smart Home Relay Driver
Use Scenario: Implementing redundant DC power inputs in telecom or industrial PSUs using discrete OR-ing topology. IC Role / Device Role / Timing Role: High-current NPN switch replacing Schottky diodes to reduce forward voltage drop and improve efficiency. Use Value: V_CE(sat) ≤ 0.5 V cuts conduction loss by >50% vs. typical 0.45 V Schottky at 1 A, improving system efficiency.	Use Scenario: Driving electromechanical relays in smart home hubs where space-constrained PCBs require surface-mount solutions. IC Role / Device Role / Timing Role: General-purpose switching transistor interfacing microcontroller GPIO to relay coil. Use Value: h_FE ≥ 50 at 5 mA base drive ensures full saturation with minimal MCU current; SOT-223 footprint saves board area vs. TO-92.

Automotive LED Headlamp Driver

Industrial DC Motor Control

Use Scenario: Switching high-intensity LED arrays in automotive headlamps requiring precise current regulation and thermal resilience.

IC Role / Device Role / Timing Role: NPN power switch controlling LED current path in constant-current buck or linear driver stages.

Use Value: V_CE(sat) ≤ 0.5 V minimizes power loss at 1 A, while AEC-Q101 qualification ensures reliability over vehicle lifetime.

Use Scenario: Driving brushed DC motors in factory automation systems where compact size and thermal robustness are critical.

IC Role / Device Role / Timing Role: Low-side switch in half-bridge or single-ended motor driver circuits.

Use Value: SOT-223 package enables direct PCB heatsinking; 1.0 A rating supports motors up to ~24 V/20 W without external heatsink.

Power Supply OR-ing Circuit

Smart Home Relay Driver

Use Scenario: Implementing redundant DC power inputs in telecom or industrial PSUs using discrete OR-ing topology.

IC Role / Device Role / Timing Role: High-current NPN switch replacing Schottky diodes to reduce forward voltage drop and improve efficiency.

Use Value: V_CE(sat) ≤ 0.5 V cuts conduction loss by >50% vs. typical 0.45 V Schottky at 1 A, improving system efficiency.

Use Scenario: Driving electromechanical relays in smart home hubs where space-constrained PCBs require surface-mount solutions.

IC Role / Device Role / Timing Role: General-purpose switching transistor interfacing microcontroller GPIO to relay coil.

Use Value: h_FE ≥ 50 at 5 mA base drive ensures full saturation with minimal MCU current; SOT-223 footprint saves board area vs. TO-92.

Equivalent & Alternatives

The following parts are listed as comparable options for similar NPN high-current switching applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
BCP56T1G	V_CEO = 80 V, I_C = 1.0 A, h_FE = 40–250 - higher voltage rating but lower gain consistency at high current	Preferred in higher-voltage industrial supplies (>48 V); less optimal for low-V_CE saturation-critical designs	Select BCP56T1G only when V_CEO > 20 V is required; BCP68T1 remains superior for 12–24 V systems demanding low V_CE(sat)
ZTX851	V_CEO = 60 V, I_C = 2.0 A, SOT-89 package - higher current, different footprint, no AEC-Q101 qualification	Suitable for non-automotive industrial power stages; requires PCB layout change and requalification	Choose ZTX851 for higher current headroom and thermal performance in non-automotive contexts; BCP68T1 preferred where AEC-Q101 and SOT-223 compatibility are mandatory

Compared with BCP56T1G and ZTX851, the BCP68T1 offers the best balance of low saturation voltage (≤0.5 V), automotive qualification, and SOT-223 thermal performance for 12–24 V high-current switching - making it optimal for space- and reliability-constrained automotive and industrial designs.

Availability

BCP68T1 is available at Aetrix Electronics and suitable for automotive LED drivers, industrial motor controllers, power supply OR-ing circuits, and smart home relay interfaces requiring stable component supply and long-term lifecycle support.

Supply support for BCP68T1 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

onsemi (formerly ON Semiconductor) is a global semiconductor supplier focused on energy-efficient power, analog, sensing, and connectivity solutions for automotive, industrial, cloud, and consumer markets.

The BCP68T1 belongs to onsemi's medium-power bipolar transistor family, engineered specifically for high-current, surface-mount switching in automotive and industrial environments where thermal reliability and AEC-Q101 compliance are essential.

FAQ

What is the maximum collector-emitter voltage rating for the BCP68T1?

The BCP68T1 has a maximum collector-emitter voltage rating (V_CEO) of 20 VDC under open-base conditions with I_C = 1.0 mA. This rating defines the upper limit for safe operation in switching applications; exceeding it risks avalanche breakdown and permanent device failure. The BCP68T1 is therefore suited for 12 V and 24 V nominal systems but not for 48 V or higher bus architectures.

Does the BCP68T1 meet automotive qualification standards?

Yes, the BCP68T1 is AEC-Q101 qualified and PPAP capable, confirming its suitability for automotive applications such as body control modules, lighting drivers, and power distribution units. The "S" prefix in ordering codes like SBCP68T1G* explicitly denotes automotive-grade traceability and process control - a requirement verified through onsemi's certified qualification testing.

What is the saturation voltage of the BCP68T1 at full load?

The BCP68T1 exhibits a maximum collector-emitter saturation voltage (V_CE(sat)) of 0.5 V when operated at I_C = 1.0 A and I_B = 100 mA. This low V_CE(sat) directly reduces conduction losses in high-current switching paths - for example, limiting power dissipation to 0.5 W at 1 A, which simplifies thermal design compared to alternatives with higher saturation voltages.

How many collector terminals does the BCP68T1 have, and why?

The BCP68T1 has two collector terminals - pins 2 and 4 - as defined in its SOT-223 package pinout. This dual-collector configuration lowers effective thermal resistance and improves current sharing, enabling better heat transfer to the PCB copper pour. It also enhances mechanical robustness during reflow and wave soldering by distributing thermal stress across multiple leads.

What is the complementary PNP transistor for the BCP68T1?

The complementary PNP transistor for the BCP68T1 is the BCP69T1, specified by onsemi as its direct counterpart in the same SOT-223 package. Both devices share matched electrical characteristics (e.g., voltage ratings, current capability, and thermal behavior), enabling balanced performance in push-pull, H-bridge, and differential amplifier configurations where pairing fidelity is critical.

BCP68T1 Specifications

Product attributes: Attribute value

Manufacturer:: onsemi

Series:: *

Package/Case:: -

Packaging:: Cut Tape (CT)

Product Status:: Obsolete

Transistor Type:: -

Current - Collector (Ic) (Max):: -

Voltage - Collector Emitter Breakdown (Max):: -

Vce Saturation (Max) @ Ib, Ic:: -

Current - Collector Cutoff (Max):: -

DC Current Gain (hFE) (Min) @ Ic, Vce:: -

Power - Max:: -

Frequency - Transition:: -

Operating Temperature:: -

Grade:: -

Qualification:: -

Mounting Type:: -

Supplier Device Package:: -

BCP68T1 FAQ

1.How can I place an order for BCP68T1 through Aetrix?

Please submit a Request for Quotation (RFQ) for BCP68T1 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 BCP68T1 reliable?

The price and inventory of BCP68T1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BCP68T1 is usually 5 days.

3.What payment methods are accepted for BCP68T1?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BCP68T1 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for BCP68T1?

BCP68T1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your BCP68T1 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 BCP68T1?

For technical support, including BCP68T1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BCP68T1 requirements.

6.How does Aetrix verify that BCP68T1 is sourced from the original manufacturer or authorized distributors?

All BCP68T1 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 BCP68T1 meets industry standards.

7.What is the process for return or replacement of BCP68T1?

All BCP68T1 units undergo pre-shipment inspection (PSI). If there is an issue with BCP68T1, 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 BCP68T1 part is unused and in its original packaging.

Return procedure for BCP68T1:

1.Submit a request within 90 days.

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

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