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

Nexperia USA Inc. BCP56-16-QX

Name: BCP56-16-QX
Brand: Nexperia USA Inc.
SKU: BCP56-16-QX
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: BCP56-16-QX

Manufacturer:: Nexperia USA Inc.

Category:: Single Bipolar Transistors

Package:: TO-261-4, TO-261AA

Datasheet:: BCP56-16-QX.pdf

Description:: TRANS NPN 80V 1A SOT-223

Quantity:: RFQ Add To RFQ list

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Product details

Overview

BCP56-16-QX from Nexperia is an AEC-Q101-qualified NPN medium power transistor in SOT223 (SC-73) package, rated for 80 V V_CEO, 1 A continuous collector current, and 100–250 h_FE at V_CE = 2 V / I_C = 150 mA. It serves as a low-side switch or MOSFET driver in automotive linear regulators and battery-powered power management circuits.

For engineers reviewing the BCP56-16-QX datasheet, BCP56-16-QX pinout, BCP56-16-QX application, or BCP56-16-QX equivalent, this page delivers verified electrical parameters, thermal derating behavior, automotive qualification status, and real-world use context - all grounded in Nexperia's Rev. 2 (2022) product data sheet.

Technical Context

This transistor operates as a single NPN silicon switching device with high-current capability (I_C = 1 A, I_CM = 2 A), optimized for stable DC gain across temperature (h_FE = 100–250 at 25 °C) and low saturation voltage (V_CEsat ≤ 500 mV at I_C = 500 mA / I_B = 50 mA). Its 150 °C maximum junction temperature and AEC-Q101 qualification confirm suitability for under-hood automotive environments.

Thermal performance depends on PCB mounting: R_th(j-a) ranges from 93 K/W (6 cm² collector pad) to 192 K/W (standard footprint), enabling design flexibility in power dissipation up to 1.35 W with appropriate copper area. The dual-collector pin (Pins 2 & 4) enhances current handling and thermal conduction in SOT223 layout.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	80 V - Maximum safe collector-emitter voltage with base open; defines upper rail limit in low-side switch designs.
I_C	1 A continuous - Sustained DC load current capacity; supports drivers for logic-level MOSFETs or small solenoids.
h_FE	100–250 at V_CE = 2 V, I_C = 150 mA - Predictable DC current gain enables stable biasing without excessive base drive overhead.
V_CEsat	≤ 500 mV at I_C = 500 mA, I_B = 50 mA - Low saturation voltage minimizes conduction loss and self-heating in switching applications.
P_tot	1.35 W with 6 cm² collector pad - Enables higher ambient operation in automotive modules when thermally enhanced.
f_T	100–180 MHz - Supports fast switching in PWM control loops up to ~10 MHz with adequate gain margin.
R_th(j-a)	93 K/W (6 cm² pad) - Confirms thermal path efficiency for board-level heatsinking without external hardware.

Pinout & Package

SOT223 (SC-73) surface-mount plastic package with 4 leads; Pin 1 = Base, Pins 2 & 4 = Collector (internally connected), Pin 3 = Emitter. The dual-collector configuration improves thermal transfer and current sharing in high-power SMT layouts.

Pin/Terminal	Circuit Role	Design Meaning
1	Base	Control input node; requires current-limited drive (max I_B = 0.3 A) to avoid saturation delay or thermal stress.
2	Collector	Main high-current output terminal; electrically tied to Pin 4 for parallel conduction and enhanced thermal coupling to PCB.
3	Emiter	Reference/return node for load current; must be routed with low-inductance trace to minimize switching noise in power stages.
4	Collector	Second collector terminal; shares internal die connection with Pin 2 to increase solder joint reliability and thermal mass.

Key Features

Feature	Design Value
AEC-Q101 qualified	Validated for automotive under-hood use per stress test standard; eliminates need for additional qualification effort in Tier-1 designs.
High h_FE bin (100–250)	Reduces required base drive current by ~2× vs. lower-gain variants (e.g., BCP56-10-Q), lowering MCU GPIO loading and driver complexity.
Dual-collector SOT223	Enables 1.35 W power dissipation with standard FR4 PCB - avoids TO-220 or DPAK for space-constrained automotive ECUs.
Low V_CEsat (≤500 mV)	Limits conduction loss to ≤250 mW at 500 mA, reducing thermal rise and enabling compact thermal design in sealed enclosures.

Applications

Linear Voltage Regulators

MOSFET Drivers

Use Scenario: Pass transistor in adjustable LDO or emitter-follower regulator supplying 3.3 V/1 A to microcontroller subsystems.

IC Role / Device Role / Timing Role: NPN pass element controlling output voltage via base bias; operates in linear region with continuous conduction.

Use Value: Stable 1 A output with <500 mV dropout at full load due to low V_CEsat and predictable h_FE.

Use Scenario: Gate driver stage for N-channel power MOSFETs in 12 V automotive motor control or lighting modules.

IC Role / Device Role / Timing Role: Low-side level-shifting switch turning on/off MOSFET gate with fast edge control.

Use Value: 180 MHz f_T ensures <100 ns turn-on delay; dual-collector pins reduce gate charge time and improve thermal stability.

Low-Side Switches

Battery-Driven Devices

Use Scenario: Load switch for 24 V HVAC actuators or fuel pump control in passenger vehicles.

IC Role / Device Role / Timing Role: High-current NPN switch sinking load current to ground; driven by MCU GPIO or dedicated driver IC.

Use Value: 80 V V_CEO withstands load-dump transients; 150 °C T_j rating supports operation in engine bay ambient up to 125 °C.

Use Scenario: Power enable switch in portable diagnostic tools or telematics units powered by 12 V lead-acid or LiFePO₄ batteries.

IC Role / Device Role / Timing Role: Battery isolation switch managing system power-up sequencing and reverse-polarity protection interface.

Use Value: AEC-Q101 qualification ensures long-term reliability in cyclic charge/discharge environments; low standby leakage (<100 nA) preserves battery life.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
BCP56-10-Q	h_FE = 63–160 (lower gain bin); otherwise identical ratings and package.	Requires ~1.6× higher base current for same collector drive; less suitable for low-drive MCU outputs.	Select when gain tolerance >160 is unnecessary and cost optimization is prioritized.
ZTX653	TO-92 package; V_CEO = 60 V; P_tot = 1 W; h_FE = 100–800 - wider gain spread, lower voltage rating.	Not AEC-Q101 qualified; unsuitable for automotive; limited thermal performance in SMT layouts.	Use only in non-automotive consumer or industrial prototypes where footprint and qualification are secondary.

Compared with BCP56-10-Q and ZTX653, BCP56-16-QX delivers superior automotive compliance, tighter h_FE control, and higher thermal headroom in SOT223 - making it the preferred choice for production-grade automotive power switches requiring robustness and design margin.

Availability

BCP56-16-QX is available at Aetrix Electronics and suitable for automotive electronic control units, battery management systems, and industrial power supplies requiring stable component supply, AEC-Q101 assurance, and SMT-compatible medium-power switching.

Supply support for BCP56-16-QX 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 semiconductors, delivering high-performance, reliable components for automotive, industrial, and consumer markets.

The BCP56-Q series belongs to Nexperia's AEC-Q101-qualified discrete transistor portfolio, engineered specifically for robust, thermally efficient medium-power switching in automotive power management and actuation systems.

FAQ

Is BCP56-16-QX pin-compatible with other SOT223 NPN transistors?

Yes - BCP56-16-QX uses standard SOT223 pinout (Pin 1 = Base, Pins 2 & 4 = Collector, Pin 3 = Emitter), matching industry-standard layout footprints. However, its dual-collector construction differs from single-collector SOT223 devices like BCX56, so PCB land patterns must accommodate both collector pads.

What is the maximum allowable base current for continuous operation?

The absolute maximum DC base current is 0.3 A per Nexperia's limiting values table. For reliable continuous operation, keep I_B ≤ 50 mA (as used in V_CEsat test conditions) to avoid thermal runaway and ensure h_FE stability across temperature.

Does BCP56-16-QX require a heatsink in typical automotive applications?

No external heatsink is required if mounted on FR4 PCB with ≥1 cm² copper area on the collector pads. At 1 A load and 25 °C ambient, junction temperature stays below 100 °C with 1 cm² pad (R_th(j-a) = 125 K/W); 6 cm² pad enables full 1.35 W dissipation at 125 °C ambient.

How does the AEC-Q101 qualification impact design validation?

AEC-Q101 qualification confirms successful completion of stress tests including HTOL, temperature cycling, and ESD - eliminating need for duplicate qualification testing. Designers may proceed directly to system-level validation, provided board layout follows Nexperia's SOT223 thermal guidelines and reflow profiles.

BCP56-16-QX Specifications

Product attributes: Attribute value

Manufacturer:: Nexperia USA Inc.

Series:: BCP56-Q

Package/Case:: TO-261-4, TO-261AA

Packaging:: Tape & Reel (TR)

Product Status:: Active

Transistor Type:: NPN

Current - Collector (Ic) (Max):: 1 A

Voltage - Collector Emitter Breakdown (Max):: 80 V

Vce Saturation (Max) @ Ib, Ic:: 500mV @ 50mA, 500mA

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

DC Current Gain (hFE) (Min) @ Ic, Vce:: 100 @ 150mA, 2V

Power - Max:: 650 mW

Frequency - Transition:: 180MHz

Operating Temperature:: 150°C (TJ)

Grade:: Automotive

Qualification:: AEC-Q101

Mounting Type:: Surface Mount

Supplier Device Package:: SOT-223

BCP56-16-QX FAQ

1.How can I place an order for BCP56-16-QX through Aetrix?

Please submit a Request for Quotation (RFQ) for BCP56-16-QX 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 BCP56-16-QX reliable?

The price and inventory of BCP56-16-QX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BCP56-16-QX is usually 5 days.

3.What payment methods are accepted for BCP56-16-QX?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BCP56-16-QX transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for BCP56-16-QX?

BCP56-16-QX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your BCP56-16-QX 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 BCP56-16-QX?

For technical support, including BCP56-16-QX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BCP56-16-QX requirements.

6.How does Aetrix verify that BCP56-16-QX is sourced from the original manufacturer or authorized distributors?

All BCP56-16-QX 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 BCP56-16-QX meets industry standards.

7.What is the process for return or replacement of BCP56-16-QX?

All BCP56-16-QX units undergo pre-shipment inspection (PSI). If there is an issue with BCP56-16-QX, 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 BCP56-16-QX part is unused and in its original packaging.

Return procedure for BCP56-16-QX:

1.Submit a request within 90 days.

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

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