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

Nexperia USA Inc. BCP55-10-QX

Name: BCP55-10-QX
Brand: Nexperia USA Inc.
SKU: BCP55-10-QX
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: BCP55-10-QX

Manufacturer:: Nexperia USA Inc.

Category:: Single Bipolar Transistors

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

Datasheet:: BCP55-10-QX.pdf

Description:: TRANS NPN 60V 1A SOT-223

Quantity:: RFQ Add To RFQ list

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Inventory:4,570

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Product details

Overview

BCP55-10-QX from Nexperia is a 60 V, 1 A NPN medium-power bipolar junction transistor in SOT223 (SC-73) package, optimized for linear voltage regulation, low-side switching, and MOSFET gate driving with h_FE = 63–160 at I_C = 150 mA and V_CE = 2 V. It supports automotive-grade operation per AEC-Q101 and delivers 1.00 W power dissipation on 1 cm² copper pad.

For engineers reviewing the BCP55-10-QX datasheet, BCP55-10-QX pinout, BCP55-10-QX application, or BCP55-10-QX equivalent, key selection criteria include its 60 V V_CEO, 1 A continuous collector current, AEC-Q101 qualification, thermal resistance of 125 K/W (1 cm² pad), and dual-collector SOT223 pinout for enhanced heatsinking in power management circuits.

Technical Context

This NPN transistor operates as a medium-power amplifying and switching device with fixed-emitter biasing topology. Its dual-collector configuration (pins 2 and 4) enables improved thermal conduction to PCB copper, while pulsed operation supports I_CM = 2 A (t_p ≤ 1 ms).

The device features three h_FE bins (63–160 for -10 variant), specified under pulsed conditions (t_p ≤ 300 μs, duty ≤ 0.02) to ensure stable DC gain across temperature (−55 °C to 150 °C). V_BE remains ≤ 1 V at I_C = 500 mA, enabling efficient base drive in low-voltage control stages.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	60 V - Maximum safe collector-emitter voltage before breakdown; enables use in 48 V automotive and industrial supply rails.
I_C	1 A continuous - Sustained load current capability; supports drivers for 500 mA MOSFET gates or 1 A linear regulator pass elements.
h_FE	63–160 @ V_CE = 2 V, I_C = 150 mA - Predictable current gain range ensures stable biasing in amplifier and switch applications without external feedback.
V_CE(sat)	≤ 0.5 V @ I_C = 500 mA, I_B = 50 mA - Low saturation voltage minimizes conduction loss in low-side switches and improves efficiency in battery-powered devices.
P_tot	1.00 W @ 1 cm² collector pad - Power handling scales with PCB copper area; requires defined thermal pad layout for rated performance.
f_T	100–180 MHz - Transition frequency supports high-speed switching up to ~10 MHz with adequate gain margin in driver stages.
R_th(j-a)	125 K/W @ 1 cm² pad - Thermal resistance defines junction-to-ambient rise; used to calculate max ambient temperature for 150 °C T_j limit.

Pinout & Package

SOT223 (SC-73) surface-mount plastic package with 4 leads and integrated heatsink tab (pin 2 and 4 both connected to collector); footprint requires 1 cm² minimum copper area on PCB for full 1.00 W rating.

Pin/Terminal	Circuit Role	Design Meaning
1	Base	Control input node; driven with 50 mA base current to saturate 500 mA collector load.
2	Collector	Main power output terminal; electrically tied to pin 4 for parallel current path and thermal conduction to PCB.
3	Emiter	Reference/return node; connects to ground or low-side load return in switch configurations.
4	Collector	Second collector terminal; shares internal connection with pin 2 to double thermal interface area and reduce R_th(j-sp).

Key Features

Feature	Design Value
AEC-Q101 qualified	Validated for automotive applications including engine control, body electronics, and ADAS power stages.
Dual-collector thermal design	Pins 2 and 4 both connect to collector, enabling 2× solder-pad contact area and lowering thermal resistance by ~30% vs single-collector SOT223.
Three h_FE bins	BCP55-10-QX offers mid-range gain (63–160), balancing drive sensitivity and stability in feedback-controlled regulators.
High P_tot capability	1.35 W possible with 6 cm² copper pad - supports higher ambient temperatures in enclosed industrial enclosures.

Applications

Linear Voltage Regulators

Power Management

Use Scenario: Used as series pass transistor in adjustable LDOs delivering 1 A at 3.3 V–12 V from 15–48 V input rails.

IC Role / Device Role / Timing Role: NPN pass element controlling output voltage via base bias from error amplifier.

Use Value: 60 V V_CEO allows direct use with 48 V bus; 0.5 V V_CE(sat) reduces dropout and improves efficiency at full load.

Use Scenario: Primary switch in DC-DC converter pre-regulator or auxiliary supply sequencer.

IC Role / Device Role / Timing Role: Medium-power discrete switch managing 1 A load sequencing or rail enable functions.

Use Value: AEC-Q101 qualification ensures reliability in automotive power domains; dual-collector layout sustains 1 A continuous under 85 °C ambient.

Low-Side Switches

MOSFET Drivers

Use Scenario: Driving solenoids, relays, or LED strings in vehicle lighting and HVAC actuators.

IC Role / Device Role / Timing Role: Ground-referenced switching element controlled by microcontroller GPIO or logic-level signal.

Use Value: 2 A peak current handles inductive kickback; 150 °C T_j rating supports operation near hot engine compartments.

Use Scenario: Gate driver stage for N-channel power MOSFETs in motor control inverters or SMPS half-bridges.

IC Role / Device Role / Timing Role: Current-amplifying buffer between logic-level controller and high-capacitance MOSFET gate.

Use Value: 180 MHz f_T ensures fast turn-on/turn-off; 1 A I_C supports 10 nF gate charge delivery within 100 ns.

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
BCP55-16-Q	Higher h_FE bin (100–250) at same V_CE/I_C; otherwise identical ratings and package.	Better suited for low-base-drive applications (e.g., microcontroller GPIO directly driving base).	Select when base current is limited (< 10 mA) and gain stability at low I_C is critical.
ZTX653	TO-92 package, 100 V V_CEO, h_FE = 100–800, P_tot = 1.25 W; no AEC-Q101 qualification.	Lacks automotive qualification; lower thermal performance due to TO-92 package.	Use only in non-automotive industrial or consumer designs where board space permits through-hole mounting.

Compared with BCP55-10-QX, the BCP55-16-Q offers higher gain for reduced base drive burden but identical voltage/current/thermal specs, while ZTX653 trades AEC-Q101 compliance and SMT compatibility for higher V_CEO and broader h_FE range in legacy packaging.

Availability

BCP55-10-QX is available at Aetrix Electronics and suitable for automotive power management, industrial linear regulators, and battery-driven low-side switching requiring stable component supply and AEC-Q101 compliance.

Supply support for BCP55-10-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 discrete, logic, and MOSFET solutions for automotive, industrial, and consumer markets.

The BCP55-Q series belongs to Nexperia's AEC-Q101-qualified medium-power transistor family, engineered specifically for robust linear regulation, switching, and driver roles in harsh-environment automotive electronics.

FAQ

What is the maximum allowable junction temperature for BCP55-10-QX?

The absolute maximum junction temperature is 150 °C, as defined in IEC 60134 limiting values. Operation above this threshold risks permanent degradation. Derating is required above 25 °C ambient-e.g., at 85 °C ambient, max power drops to ~0.52 W using the 125 K/W thermal resistance value for 1 cm² copper.

Is BCP55-10-QX pin-compatible with other SOT223 transistors like MMBT5551?

No-BCP55-10-QX has a 4-pin SOT223 outline with pins 2 and 4 both connected to the collector, whereas MMBT5551 uses a 3-pin SOT223 with single collector. The dual-collector configuration requires specific PCB footprint alignment and cannot be substituted without layout revision.

Does BCP55-10-QX support pulse-width modulation (PWM) switching?

Yes-it supports PWM operation with I_CM = 2 A for pulses ≤ 1 ms and duty cycle ≤ 0.02. Its 180 MHz f_T and low V_CE(sat) enable clean switching up to ~5 MHz, though thermal design must account for RMS power in repetitive pulse scenarios.

How does the marking "BCP55 /10" identify this part?

The top-side marking "BCP55 /10" indicates the BCP55-10-QX variant per Nexperia's ordering convention: "BCP55" is the base type, "/10" denotes the h_FE bin (63–160), and "Q" suffix confirms AEC-Q101 qualification. No date or lot code is included in the standard marking.

BCP55-10-QX Specifications

Product attributes: Attribute value

Manufacturer:: Nexperia USA Inc.

Series:: BCP55-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):: 60 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

BCP55-10-QX FAQ

1.How can I place an order for BCP55-10-QX through Aetrix?

Please submit a Request for Quotation (RFQ) for BCP55-10-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 BCP55-10-QX reliable?

The price and inventory of BCP55-10-QX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BCP55-10-QX is usually 5 days.

3.What payment methods are accepted for BCP55-10-QX?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BCP55-10-QX transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for BCP55-10-QX?

BCP55-10-QX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your BCP55-10-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 BCP55-10-QX?

For technical support, including BCP55-10-QX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BCP55-10-QX requirements.

6.How does Aetrix verify that BCP55-10-QX is sourced from the original manufacturer or authorized distributors?

All BCP55-10-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 BCP55-10-QX meets industry standards.

7.What is the process for return or replacement of BCP55-10-QX?

All BCP55-10-QX units undergo pre-shipment inspection (PSI). If there is an issue with BCP55-10-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 BCP55-10-QX part is unused and in its original packaging.

Return procedure for BCP55-10-QX:

1.Submit a request within 90 days.

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

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