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

Nexperia USA Inc. BCP56-QF

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

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Part No.:: BCP56-QF

Manufacturer:: Nexperia USA Inc.

Category:: Single Bipolar Transistors

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

Datasheet:: BCP56-QF.pdf

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

Quantity:: RFQ Add To RFQ list

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Inventory:4,736

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Product details

Overview

BCP56-Q 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 1.35 W power dissipation with 6 cm² copper pad. It delivers h_FE = 63–250 at V_CE = 2 V / I_C = 150 mA and supports automotive-grade linear voltage regulators and low-side switching.

For engineers reviewing the BCP56-Q datasheet, BCP56-Q pinout, BCP56-Q application, or BCP56-Q equivalent, this page provides verified electrical parameters, thermal derating curves, junction-to-ambient resistance values under three PCB mounting conditions, and validated alternatives for automotive power management designs.

Technical Context

This NPN bipolar transistor operates in linear and switching modes with V_CEO = 80 V, I_C = 1 A DC, and I_CM = 2 A peak (tp ≤ 1 ms). Its h_FE range (63–250) enables stable biasing across temperature (−55 °C to 150 °C) and load conditions in regulated supplies.

Thermal performance is defined by R_th(j-a) = 93 K/W (6 cm² pad), 125 K/W (1 cm²), and 192 K/W (standard footprint), with transient impedance curves confirming suitability for pulsed loads up to 300 μs duty cycle ≤ 0.02.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	80 V - Maximum safe collector-emitter voltage with base open; defines maximum supply rail compatibility in linear regulators and switch-mode drivers.
I_C	1 A - Continuous DC collector current rating; supports sustained 12 V/1 A load switching in battery-powered systems.
h_FE	63–250 - DC current gain at V_CE = 2 V / I_C = 150 mA; enables predictable base drive sizing for MOSFET gate control and amplifier stages.
P_tot	1.35 W - Total power dissipation with 6 cm² copper pad; sets thermal design margin for ambient temperatures up to +100 °C in automotive cabins.
V_CE(sat)	≤500 mV at I_C = 500 mA / I_B = 50 mA - Low saturation voltage minimizes conduction loss in low-side switch applications.
f_T	100–180 MHz - Transition frequency at V_CE = 5 V / I_C = 50 mA; confirms usable bandwidth for audio amplification and fast-switching feedback paths.

Pinout & Package

SOT223 (SC-73) surface-mount plastic package with 4 leads: pins 1 (B), 2 (C), 3 (E), and 4 (C) - dual-collector configuration enhances thermal conduction and current handling.

Pin/Terminal	Circuit Role	Design Meaning
1	Base	Control input requiring ~50 mA base drive for full 1 A collector conduction; connects to driver IC or microcontroller GPIO via current-limiting resistor.
2	Collector	Main high-current output node; electrically tied to pin 4 for parallel current sharing and improved heatsinking through large copper area.
3	Emitter	Reference terminal for load return path; typically grounded in low-side switch configurations or used as common emitter in amplifier topologies.
4	Collector	Second collector terminal bonded internally to pin 2; enables symmetric PCB layout and doubles effective thermal pad area for enhanced power dissipation.

Key Features

Feature	Design Value
AEC-Q101 qualification	Validated for automotive underhood environments per stress test standard; ensures reliability in 12 V/24 V vehicle systems with −40 °C to +125 °C operation.
Three h_FE variants	BCP56-Q (63–250), BCP56-10-Q (63–160), BCP56-16-Q (100–250); allows precise gain matching for production consistency in feedback loops and current mirrors.
Dual-collector SOT223	Pins 2 and 4 both connect to collector; reduces thermal resistance by 30% vs. single-collector SOT223 when using 6 cm² copper pad (R_th(j-a) = 93 K/W).
High V_CBO	100 V - Collector-base breakdown voltage exceeds V_CEO; provides margin against inductive kickback in relay and solenoid driver circuits.

Applications

Linear Voltage Regulators

MOSFET Drivers

Use Scenario: Pass transistor in adjustable 3-terminal linear regulator delivering 5 V/1 A from 12 V automotive supply.

IC Role / Device Role / Timing Role: NPN pass element controlling output voltage via base bias from error amplifier; handles continuous 1 A load with <500 mV dropout.

Use Value: Enables compact, low-noise regulation without external heat sink due to 1.35 W dissipation capability on standard FR4 PCB.

Use Scenario: Gate driver stage for N-channel power MOSFET in 12 V DC-DC buck converter.

IC Role / Device Role / Timing Role: Medium-power NPN switch sourcing gate current during turn-on; driven by PWM controller with 50 mA base drive.

Use Value: Delivers fast gate charging with f_T > 100 MHz and low V_CE(sat), reducing MOSFET switching losses and improving efficiency.

Low-Side Switches

Battery-Driven Devices

Use Scenario: Load switch controlling 12 V fan or LED string in automotive cabin module.

IC Role / Device Role / Timing Role: NPN low-side switch sinking up to 1 A load current; base driven by microcontroller GPIO through 220 Ω resistor.

Use Value: Supports robust on/off control with guaranteed h_FE ≥ 63 at 150 mA, ensuring saturation even at cold start (−40 °C).

Use Scenario: Power enable circuit in portable medical monitor powered by Li-ion battery pack.

IC Role / Device Role / Timing Role: Battery isolation switch enabling/disabling subsystem power rails; operated in linear mode for soft-start current limiting.

Use Value: With V_CEO = 80 V and T_j max = 150 °C, accommodates 2S–4S battery stacks and extended runtime at elevated ambient temperatures.

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
BCP56-16-Q	Higher h_FE range (100–250) vs. BCP56-Q (63–250); same V_CEO, I_C, package, and thermal specs.	Better suited for low-base-drive applications where microcontroller GPIO current is limited to <20 mA.	Select when tighter h_FE tolerance is required for production yield in feedback-critical circuits like precision regulators.
ZTX851	TO-92 package (not SMT), V_CEO = 60 V, I_C = 1 A, h_FE = 100–800; no AEC-Q101 qualification.	Limited to non-automotive, low-volume prototyping; lacks thermal performance of SOT223 dual-collector layout.	Use only for bench validation or cost-sensitive consumer products where automotive qualification and thermal margin are not required.

Compared with BCP56-16-Q, the BCP56-Q offers broader h_FE spread for flexible bias design, while ZTX851 trades SMT manufacturability and automotive compliance for higher gain in through-hole form - making BCP56-Q optimal for volume automotive SMT assembly with balanced gain and thermal robustness.

Availability

BCP56-Q is available at Aetrix Electronics and suitable for automotive linear regulators, MOSFET drivers, and low-side switches requiring stable component supply across production lifecycles.

Supply support for BCP56-Q 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-enhancing components, with leadership in logic, discrete, and MOSFET technologies.

The BCP56-Q belongs to Nexperia's AEC-Q101-qualified medium power transistor family, engineered specifically for automotive power management, battery protection, and industrial control applications demanding high reliability and thermal resilience.

FAQ

Is BCP56-Q suitable for automotive under-hood applications?

Yes. BCP56-Q is qualified to AEC-Q101 standards and rated for junction temperatures up to 150 °C. Its thermal resistance of 93 K/W (with 6 cm² copper pad) and guaranteed operation from −55 °C to +150 °C ambient make it appropriate for engine control units, body controllers, and lighting modules mounted near heat sources.

What is the significance of dual collector terminals (pins 2 and 4)?

Pins 2 and 4 are internally connected to the same collector node. This dual-terminal layout improves thermal conduction by doubling the solder joint area and enabling larger copper pour connections, reducing R_th(j-a) by up to 52% compared to single-collector SOT223 variants under identical PCB conditions.

How does h_FE variation affect circuit design?

BCP56-Q's h_FE range (63–250) requires base drive design to ensure saturation across all units. At I_C = 1 A, minimum h_FE = 63 demands ≥15.9 mA base current; designing for 20–25 mA ensures reliable turn-on even at high temperature and end-of-life degradation.

Can BCP56-Q replace BC817 in SOT23 packages?

No. BC817 is a 500 mA SOT23 transistor with lower power handling (0.5 W) and no dual-collector thermal advantage. BCP56-Q's 1 A rating, 1.35 W dissipation, and SOT223 footprint make it incompatible for direct replacement - board redesign and thermal analysis are required for upgrade paths.

BCP56-QF 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:: 63 @ 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-QF FAQ

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

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

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

3.What payment methods are accepted for BCP56-QF?

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

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for BCP56-QF?

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

Once your BCP56-QF 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-QF?

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

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

All BCP56-QF 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-QF meets industry standards.

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

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

Return procedure for BCP56-QF:

1.Submit a request within 90 days.

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

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