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

Nexperia USA Inc. BC68PASX

Name: BC68PASX
Brand: Nexperia USA Inc.
SKU: BC68PASX
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: BC68PASX

Manufacturer:: Nexperia USA Inc.

Category:: Single Bipolar Transistors

Package:: 3-UDFN Exposed Pad

Datasheet:: BC68PASX.pdf

Description:: TRANS NPN 20V 2A DFN2020D-3

Quantity:: RFQ Add To RFQ list

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Product details

Overview

BC68PASX from Nexperia is an AEC-Q101 qualified NPN medium power transistor in a DFN2020D-3 (SOT1061D) leadless package, designed for low-side switching and MOSFET driver stages in automotive and industrial power management. It delivers 2 A continuous collector current, 20 V V_CEO, DC current gain (h_FE) of 85–375 at I_C = 500 mA, and features exposed thermal pad for enhanced heat dissipation on FR4 PCBs.

For engineers reviewing the BC68PASX datasheet, BC68PASX pinout, BC68PASX application, or BC68PASX equivalent, this page provides verified package mapping, thermal resistance values under five PCB mounting conditions, h_FE binning options (-25 variant), saturation voltage at 2 A, and AOI-compatible solder joint design support.

Technical Context

This NPN bipolar junction transistor operates as a linear or saturated switch with base-controlled current amplification. Its design supports stable DC biasing across −55 °C to 150 °C ambient, with V_BE = 0.7 V at 5 mA and up to 1.0 V at 1 A, and transition frequency f_T = 170 MHz at 50 mA.

Thermal performance is defined by five R_th(j-a) values (76–298 K/W) depending on PCB copper layer count and collector pad area, while R_th(j-sp) = 20 K/W enables precise solder-point thermal modeling. The device meets IEC 60134 absolute maximum ratings including 32 V V_CBO and 3 A I_CM (1 ms pulse).

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	20 V - Maximum safe collector-emitter voltage with open base; defines upper rail limit in low-side switch designs.
I_C	2 A - Continuous DC collector current rating; supports sustained load switching in battery-powered regulators.
h_FE	85–375 - DC current gain at V_CE = 1 V, I_C = 500 mA; enables precise base drive sizing for predictable saturation.
V_CE(sat)	0.6 V @ I_C = 2 A, I_B = 200 mA - Low saturation voltage minimizes conduction loss in high-current switching paths.
R_th(j-a)	76 K/W - Minimum thermal resistance with 4-layer FR4 PCB and 1 cm² collector pad; critical for thermal margin in compact layouts.
P_tot	1.65 W - Max power dissipation on 4-layer FR4 with 1 cm² collector pad; sets practical power handling under derating.
AEC-Q101	Qualified - Validated for automotive applications per stress test standard; supports under-hood and body-control use cases.

Pinout & Package

BC68PASX uses the DFN2020D-3 (SOT1061D) thermally enhanced ultra-thin package: 2.0 × 2.0 × 0.65 mm body with exposed collector pad on underside and solderable side terminals. The package supports automatic optical inspection (AOI) and offers superior thermal conductivity vs. conventional SOT-23.

Pin/Terminal	Circuit Role	Design Meaning
1	Base	Current-controlled input node; requires 200 mA base drive for full 2 A saturation; sensitive to ESD per AEC-Q101 requirements.
2	Emiter	Reference terminal for bias network; connected to ground or low-side return path; forms common-emitter configuration with collector output.
3	Collector	High-current output node with exposed thermal pad; must be routed to ≥1 cm² copper pour for rated power dissipation and thermal reliability.

Key Features

Feature	Design Value
AEC-Q101 qualification	Validated for automotive temperature cycling, humidity, and mechanical shock; eliminates requalification effort for Tier 1 suppliers.
Exposed collector pad	Enables direct thermal coupling to PCB copper; reduces R_th(j-a) by up to 75% vs. standard SOT-23 packages under identical layout.
Two h_FE bins	Standard (85–375) and -25 variant (160–375); allows tighter control of base drive current in production-critical amplifier or regulator feedback loops.
AOI-compatible terminals	Solderable side pads enable automated optical inspection of solder joints without X-ray; reduces post-reflow defect escape in high-volume manufacturing.
Ultra-thin profile	0.65 mm max height supports ultra-low-profile designs in space-constrained modules such as automotive ECUs and portable power tools.

Applications

Linear Voltage Regulators

Low-Side Switches

Use Scenario: Pass transistor in adjustable LDOs delivering 1–2 A to microcontrollers or sensors in automotive body electronics.

IC Role / Device Role / Timing Role: NPN emitter-follower configured as series pass element, controlled by error amplifier feedback loop.

Use Value: 0.6 V V_CE(sat) at 2 A enables <1.2 V dropout at full load, supporting 3.3 V output from 4.5 V input rails.

Use Scenario: High-side load disconnect or motor direction control in 12 V automotive subsystems (e.g., HVAC actuators, seat controls).

IC Role / Device Role / Timing Role: NPN low-side switch driving gate of external N-channel MOSFET or directly switching resistive/inductive loads.

Use Value: 2 A I_C rating and 3 A I_CM allow robust pulsed operation during motor startup surges without thermal runaway.

Battery-Driven Devices

MOSFET Drivers

Use Scenario: Load switch enabling/disabling power to peripherals in portable medical devices or handheld test equipment.

IC Role / Device Role / Timing Role: Discrete NPN switch controlling V_IN to downstream DC-DC converters or analog front-ends.

Use Value: AEC-Q101 qualification ensures reliability across wide temperature swings during field use; 150 °C T_j max supports sealed enclosure operation.

Use Scenario: Gate driver stage boosting current to rapidly charge/discharge gate capacitance of power MOSFETs in DC-DC converters.

IC Role / Device Role / Timing Role: NPN transistor configured as current-source sink to pull down MOSFET gate during turn-off transitions.

Use Value: 170 MHz f_T supports clean 100 ns–1 µs switching edges; low V_CE(sat) minimizes shoot-through risk during dead-time intervals.

Equivalent & Alternatives

The following parts are listed as comparable options for similar NPN medium power transistor applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
BC68-25PAS	Same package and ratings, but h_FE bin starts at 160 (vs. 85) at I_C = 500 mA; tighter gain distribution.	Preferred where base drive current must be minimized or gain stability critical (e.g., precision current mirrors).	Select when consistent high h_FE reduces base resistor tolerance sensitivity and improves thermal stability in feedback networks.
BC817-40	SOT-23 package (3.04 × 1.4 mm), lower P_tot (500 mW), V_CEO = 45 V, h_FE = 250–630; no AEC-Q101 qualification.	Suitable for non-automotive consumer or industrial applications where higher voltage headroom is needed but thermal density is lower.	Choose only for cost-sensitive, non-automotive designs with <500 mW power dissipation and no AOI or thermal pad requirements.

Compared with BC68-25PAS, BC68PASX offers broader h_FE range for flexible base drive design; versus BC817-40, it trades voltage headroom for automotive qualification, thermal performance, and AOI compatibility in space-constrained layouts.

Availability

BC68PASX is available at Aetrix Electronics and suitable for automotive body control modules, industrial battery management systems, and portable power tool motor drivers requiring stable component supply, AEC-Q101 compliance, and high thermal reliability in ultra-thin form factors.

Supply support for BC68PASX 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

Nexperia is a global semiconductor expert focused on essential efficiency technologies, delivering high-performance, reliable discrete and logic devices for automotive, industrial, and mobile markets.

The BC68PASX belongs to Nexperia's AEC-Q101 qualified medium-power bipolar transistor family, engineered specifically for robust low-side switching and driver-stage amplification in thermally demanding automotive and industrial environments.

FAQ

What is the maximum allowable junction temperature for BC68PASX?

The absolute maximum junction temperature (T_j) is 150 °C per IEC 60134 limiting values. Operation above this threshold risks permanent degradation of h_FE and increased leakage. Derating curves in the datasheet require thermal design to maintain T_j ≤ 150 °C under worst-case ambient and power dissipation conditions.

Does BC68PASX require a heatsink for 2 A continuous operation?

No discrete heatsink is required, but PCB layout is critical: a minimum 1 cm² copper pour connected to the exposed collector pad on a 4-layer FR4 board achieves R_th(j-a) = 76 K/W, enabling 1.65 W dissipation at T_amb = 25 °C. Without adequate copper area, thermal limits will be exceeded well below 2 A.

How does the BC68PASX differ from the BC68-25PAS variant?

Both share identical package, voltage/current ratings, and AEC-Q101 qualification. The key difference is h_FE binning: BC68PASX has h_FE = 85–375 at I_C = 500 mA, while BC68-25PAS guarantees h_FE ≥ 160 in the same condition-enabling more predictable base drive in high-gain-critical circuits like current sources.

Can BC68PASX be used in linear amplifier configurations?

Yes-it is characterized for linear operation with h_FE specified at multiple I_C points (5 mA to 2 A) and f_T = 170 MHz. However, its primary design intent is switching; for precision analog amplification, dedicated RF or general-purpose transistors with tighter h_FE tolerance and lower noise are recommended.

BC68PASX Specifications

Product attributes: Attribute value

Manufacturer:: Nexperia USA Inc.

Series:: -

Package/Case:: 3-UDFN Exposed Pad

Packaging:: Tape & Reel (TR)

Product Status:: Active

Transistor Type:: NPN

Current - Collector (Ic) (Max):: 2 A

Voltage - Collector Emitter Breakdown (Max):: 20 V

Vce Saturation (Max) @ Ib, Ic:: 600mV @ 200mA, 2A

Current - Collector Cutoff (Max):: 100nA (ICBO)

DC Current Gain (hFE) (Min) @ Ic, Vce:: 85 @ 500mA, 1V

Power - Max:: 420 mW

Frequency - Transition:: 170MHz

Operating Temperature:: 150°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: DFN2020D-3

BC68PASX FAQ

1.How can I place an order for BC68PASX through Aetrix?

Please submit a Request for Quotation (RFQ) for BC68PASX 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 BC68PASX reliable?

The price and inventory of BC68PASX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BC68PASX is usually 5 days.

3.What payment methods are accepted for BC68PASX?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BC68PASX transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for BC68PASX?

BC68PASX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your BC68PASX 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 BC68PASX?

For technical support, including BC68PASX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BC68PASX requirements.

6.How does Aetrix verify that BC68PASX is sourced from the original manufacturer or authorized distributors?

All BC68PASX 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 BC68PASX meets industry standards.

7.What is the process for return or replacement of BC68PASX?

All BC68PASX units undergo pre-shipment inspection (PSI). If there is an issue with BC68PASX, 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 BC68PASX part is unused and in its original packaging.

Return procedure for BC68PASX:

1.Submit a request within 90 days.

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

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