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

Nexperia USA Inc. BCX55-16-QF

Name: BCX55-16-QF
Brand: Nexperia USA Inc.
SKU: BCX55-16-QF
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: BCX55-16-QF

Manufacturer:: Nexperia USA Inc.

Category:: Single Bipolar Transistors

Package:: TO-243AA

Datasheet:: BCX55-16-QF.pdf

Description:: TRANS NPN 60V 1A SOT-89

Quantity:: RFQ Add To RFQ list

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Inventory:5,182

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Product details

Overview

BCX55-16-QF from Nexperia is an AEC-Q101-qualified NPN medium power transistor in SOT89 (SC-62) package, rated for 60 V V_CEO, 1 A continuous I_C, and 100–250 h_FE at V_CE = 2 V / I_C = 150 mA. It delivers high thermal performance via exposed collector pad and serves as low-side switch or MOSFET driver in automotive power management systems.

For engineers reviewing the BCX55-16-QF datasheet, BCX55-16-QF pinout, BCX55-16-QF application, or BCX55-16-QF equivalent, this page provides verified pin functions, thermal derating curves, AEC-Q101 qualification status, h_FE binning details, and direct alternatives with documented gain and packaging differences.

Technical Context

This transistor operates as a linear or switching NPN device with fixed emitter-base and collector-emitter breakdown voltages of 5 V and 60 V respectively. Its pulsed I_CM rating of 2 A and V_CEsat ≤ 0.5 V at I_C = 500 mA / I_B = 50 mA support robust switching in battery-driven loads.

Thermal design is enabled by three defined R_th(j-a) values (250 K/W standard footprint, 132 K/W 1 cm² pad, 93 K/W 6 cm² pad) and R_th(j-sp) = 16 K/W to solder point - all measured on FR4 PCB per IEC 60134.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	60 V - Maximum safe collector-emitter voltage with base open; defines upper rail limit in 48 V automotive systems.
I_C (continuous)	1 A - Continuous DC collector current; supports load switching up to ~12 W at 12 V with adequate heatsinking.
h_FE	100–250 - DC current gain range at V_CE = 2 V / I_C = 150 mA / T_amb = 25 °C; enables precise base drive sizing for saturation.
V_CEsat	≤ 0.5 V - Collector-emitter saturation voltage at I_C = 500 mA / I_B = 50 mA; limits conduction loss to < 250 mW in saturated switch mode.
P_tot (max)	1.35 W - Total power dissipation with 6 cm² copper pad; sets thermal ceiling for PCB layout and ambient temperature derating.
f_T	100–180 MHz - Transition frequency at V_CE = 5 V / I_C = 50 mA; confirms suitability for low-MHz switching and analog amplification.
R_th(j-sp)	16 K/W - Junction-to-solder-point thermal resistance; critical for estimating die temperature rise above PCB copper temperature.

Pinout & Package

SOT89 (SC-62) surface-mount plastic package with exposed collector pad for enhanced thermal and electrical conductivity; 3-pin flat-lead outline measuring 4.6 mm × 2.6 mm × 1.8 mm (L × W × H), compliant with JEITA and RoHS standards.

Pin/Terminal	Circuit Role	Design Meaning
1	Emitter (E)	Current return path; connected to ground or low-side reference; requires low-impedance trace for stable biasing.
2	Collector (C)	Main power output node; electrically and thermally tied to exposed pad; must be routed to large copper area for heat dissipation.
3	Base (B)	Control input; driven by microcontroller GPIO or logic-level signal; series resistor required to limit I_B ≤ 0.3 A peak.

Key Features

Feature	Design Value
AEC-Q101 qualification	Qualified for automotive under stress test standard; supports deployment in engine control, body electronics, and ADAS power stages without additional reliability screening.
Exposed collector pad	Direct thermal path from die to PCB copper; enables 1.35 W dissipation with 6 cm² mounting pad - 2.7× higher than standard SOT89 footprint.
Three h_FE bins	BCX55-16-QF offers 100–250 h_FE; tighter gain spread than BCX55-10-Q (63–160) or BCX55-Q (63–250), improving consistency in production base-drive circuits.
High V_CEO/V_CBO	60 V rating allows use in 42 V stop-start systems and industrial 48 V DC distribution without derating or overvoltage protection overhead.

Applications

Linear Voltage Regulators

Power Management

Use Scenario: Pass transistor in adjustable LDOs delivering 3.3 V/1 A from 12 V automotive supply.

IC Role / Device Role / Timing Role: NPN pass element controlling output voltage via emitter-follower configuration with feedback loop.

Use Value: Low V_CEsat (≤0.5 V) minimizes dropout voltage and power loss; AEC-Q101 ensures long-term stability under thermal cycling.

Use Scenario: Load switch enabling/disabling 5 V subsystems (e.g., infotainment USB ports) in vehicle ECUs.

IC Role / Device Role / Timing Role: Low-side switch controlled by MCU GPIO with base resistor network.

Use Value: 1 A continuous rating handles typical USB load; exposed pad maintains T_j < 125 °C at 50 °C ambient with minimal copper.

Low-Side Switches

MOSFET Drivers

Use Scenario: Driving solenoid valves (12 V/0.8 A) in HVAC actuators or fuel injectors.

IC Role / Device Role / Timing Role: Saturated NPN switch sinking current to ground; base driven by PWM controller.

Use Value: Fast turn-on/off supported by f_T ≥ 100 MHz; 2 A peak rating accommodates inductive kickback during turn-off.

Use Scenario: Level-shifting and current boosting stage for driving N-channel MOSFET gates in motor control half-bridges.

IC Role / Device Role / Timing Role: Active pull-down transistor providing fast gate discharge path.

Use Value: High h_FE bin enables low base drive current (e.g., 5 mA → 500 mA); V_CEO = 60 V withstands bootstrap node transients.

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
BCX55-10-Q	h_FE = 63–160 (lower mid-range gain); same V_CEO, I_C, package, and AEC-Q101 qualification.	Less consistent base drive across production lots; suitable where gain tolerance > 40% is acceptable.	Select when cost sensitivity outweighs need for tight h_FE control in volume automotive modules.
ZTX653	TO-92 package (no exposed pad); V_CEO = 60 V, I_C = 1 A, h_FE = 100–800; not AEC-Q101 qualified.	Limited thermal performance (P_tot ≈ 0.8 W); unsuitable for sustained 1 A operation in automotive underhood environments.	Use only in non-automotive, space-constrained consumer designs where qualification is not required.

Compared with BCX55-10-Q and ZTX653, BCX55-16-QF provides the highest guaranteed h_FE floor (100) and superior thermal capability via SOT89 exposed pad - making it optimal for AEC-Q101-compliant low-side switches demanding predictable gain and stable junction temperature.

Availability

BCX55-16-QF is available at Aetrix Electronics and suitable for automotive power management, linear voltage regulators, and MOSFET driver circuits requiring stable component supply and AEC-Q101 compliance.

Supply support for BCX55-16-QF 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 BCX55-Q series belongs to Nexperia's AEC-Q101-qualified medium-power bipolar transistor line, engineered specifically for automotive power switching, regulation, and driver applications where thermal robustness and parametric consistency are critical.

FAQ

What is the marking code for BCX55-16-QF?

The marking code printed on the device body is "BM", as specified in Table 5 of the Nexperia datasheet Rev. 2 (2025-07-29). This code uniquely identifies the BCX55-16-Q variant within the BCX55-Q series and corresponds to the 100–250 h_FE bin.

Can BCX55-16-QF replace BCX55-10-Q in existing designs?

Yes, BCX55-16-QF is pin-compatible and electrically substitutable for BCX55-10-Q, with identical V_CEO, I_C, package, and AEC-Q101 qualification. The higher minimum h_FE (100 vs. 63) may reduce required base drive current but does not affect layout or thermal design.

What is the maximum allowable PCB copper area for thermal optimization?

The datasheet specifies P_tot = 1.35 W with a 6 cm² collector pad on FR4 - this is the validated maximum copper area used in thermal characterization. Larger pads yield diminishing returns; no derating data is provided beyond 6 cm², so 6 cm² is the design target for full-rated power handling.

Is BCX55-16-QF suitable for linear amplifier applications?

Yes - its f_T of 100–180 MHz, low V_CEsat, and stable h_FE across I_C = 5 mA to 500 mA (Fig. 5) support Class-A and AB audio preamplifier stages and sensor signal conditioning, provided junction temperature remains ≤ 150 °C with appropriate heatsinking.

BCX55-16-QF Specifications

Product attributes: Attribute value

Manufacturer:: Nexperia USA Inc.

Series:: -

Package/Case:: TO-243AA

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:: 100 @ 150mA, 2V

Power - Max:: 500 mW

Frequency - Transition:: 180MHz

Operating Temperature:: 150°C (TJ)

Grade:: Automotive

Qualification:: AEC-Q101

Mounting Type:: Surface Mount

Supplier Device Package:: SOT-89

BCX55-16-QF FAQ

1.How can I place an order for BCX55-16-QF through Aetrix?

Please submit a Request for Quotation (RFQ) for BCX55-16-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 BCX55-16-QF reliable?

The price and inventory of BCX55-16-QF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BCX55-16-QF is usually 5 days.

3.What payment methods are accepted for BCX55-16-QF?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BCX55-16-QF transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for BCX55-16-QF?

BCX55-16-QF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your BCX55-16-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 BCX55-16-QF?

For technical support, including BCX55-16-QF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BCX55-16-QF requirements.

6.How does Aetrix verify that BCX55-16-QF is sourced from the original manufacturer or authorized distributors?

All BCX55-16-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 BCX55-16-QF meets industry standards.

7.What is the process for return or replacement of BCX55-16-QF?

All BCX55-16-QF units undergo pre-shipment inspection (PSI). If there is an issue with BCX55-16-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 BCX55-16-QF part is unused and in its original packaging.

Return procedure for BCX55-16-QF:

1.Submit a request within 90 days.

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

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