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

Nexperia USA Inc. BCX56,115

Name: BCX56,115
Brand: Nexperia USA Inc.
SKU: BCX56,115
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: BCX56,115

Manufacturer:: Nexperia USA Inc.

Category:: Single Bipolar Transistors

Package:: TO-243AA

Datasheet:: BCX56,115.pdf

Description:: TRANS NPN 80V 1A SOT-89

Quantity:: RFQ Add To RFQ list

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Product details

Overview

BCX56,115 from Nexperia is an NPN medium power transistor in SOT89 (SC-62) package, rated for 80 V V_CEO, 1 A continuous collector current, and 1.35 W total power dissipation on 6 cm² copper pad - used as low-side switch or MOSFET driver in battery-powered power management circuits.

For engineers reviewing the BCX56,115 datasheet, BCX56,115 pinout, BCX56,115 application, or BCX56,115 equivalent, this device supports linear voltage regulation, amplifier stages, and high-current switching where thermal performance on FR4 PCBs and h_FE consistency across 150 mA bias are critical selection criteria.

Technical Context

This transistor operates as a single NPN silicon bipolar junction device with open-base V_CEO = 80 V and V_CBO = 100 V, supporting pulsed I_CM up to 2 A (tp ≤ 1 ms). Its h_FE range of 63–250 at V_CE = 2 V / I_C = 150 mA enables predictable DC gain in analog and switching configurations.

Thermal design relies on validated R_th(j-a) values: 93 K/W (6 cm² collector pad), 132 K/W (1 cm²), and 250 K/W (standard footprint), with transient impedance curves provided for pulse durations from 10⁻⁵ s to 10³ s under defined duty cycles.

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 or regulator applications.
I_C	1 A - continuous DC collector current rating; determines sustained load-driving capability without derating.
h_FE	63–250 - DC current gain at V_CE = 2 V / I_C = 150 mA; ensures stable base drive sizing for switching or amplification.
P_tot	1.35 W - max power dissipation with 6 cm² copper pad; sets thermal layout requirement for reliable operation at full current.
f_T	100–180 MHz - transition frequency at V_CE = 5 V / I_C = 50 mA; confirms suitability for audio-frequency amplification and fast-switching drivers.
V_CE(sat)	≤0.5 V at I_C = 500 mA / I_B = 50 mA; minimizes conduction loss and self-heating in saturated switching mode.

Pinout & Package

SOT89 (SC-62) surface-mount plastic package: 3-lead flat lead outline, 4.5 mm × 2.5 mm × 1.5 mm body, 1.5 mm lead pitch, collector tab forms exposed thermal pad (Pin 2).

Pin/Terminal	Circuit Role	Design Meaning
1	Emitter (E)	Current return path; connected to ground or low-side reference; requires low-impedance trace for stability in switching.
2	Collector (C)	Main output terminal and thermal interface; soldered to ≥1 cm² copper area for heat extraction per R_th(j-a) spec.
3	Base (B)	Control input; driven with current-limited source (e.g., resistor from MCU GPIO) to ensure I_B ≤ 0.3 A peak.

Key Features

Feature	Design Value
High collector current capability	1 A continuous + 2 A pulsed rating enables robust load switching without external current boosting.
Three h_FE selections (BCX56 / -10 / -16)	Allows precise gain matching across production batches or circuit sensitivity requirements (e.g., 100–250 for BCX56-16).
High power dissipation on standard PCB	1.35 W with 6 cm² collector pad supports >500 mA loads in compact industrial or portable designs without heatsinks.
Low V_CE(sat)	≤0.5 V at I_C/I_B = 10 ensures <500 mW conduction loss at 1 A, reducing thermal stress in battery-fed systems.

Applications

Linear Voltage Regulators

MOSFET Drivers

Use Scenario: Pass transistor in adjustable LDO or series regulator with 12–48 V input and 5–24 V output.

IC Role / Device Role / Timing Role: NPN pass element controlling output voltage via base bias; handles full load current and dissipates excess power.

Use Value: 80 V V_CEO supports wide input ranges; 1.35 W P_tot allows >500 mA output at 10 V dropout without forced cooling.

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

IC Role / Device Role / Timing Role: Low-side level-shifting switch that sinks gate charge rapidly during turn-off.

Use Value: 2 A I_CM and ≤0.5 V V_CE(sat) enable sub-100 ns gate discharge with minimal Miller effect interference.

Low-Side Switches

Battery-Driven Devices

Use Scenario: High-current load switch (e.g., solenoid, LED array, fan) controlled by microcontroller GPIO.

IC Role / Device Role / Timing Role: Saturated NPN switch connecting load between V_CC and GND; base driven directly or via resistor.

Use Value: 1 A I_C rating and 63–250 h_FE allow direct MCU drive (e.g., 5 mA base current for 500 mA load) with margin.

Use Scenario: Power path control in portable medical monitors, handheld test equipment, or IoT sensors.

IC Role / Device Role / Timing Role: Enable/disable function for subsystems (e.g., display backlight, sensor bias, RF module) to extend battery life.

Use Value: Low standby leakage (<100 nA IEBO) and stable h_FE over −55 °C to 100 °C ensure reliability across temperature and charge cycles.

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
ZTX653	Higher V_CEO = 100 V; lower h_FE = 100–300 at I_C = 100 mA; SOT89 package identical.	Better suited for 48 V+ industrial rails but less gain margin at low base drive.	Select when higher breakdown voltage is required and base drive current is ≥10 mA.
BCP56-16	Same V_CEO = 80 V and h_FE = 100–250, but TO-92 package (through-hole); P_tot = 1.25 W on PCB.	Lacks SMT thermal pad; unsuitable for high-density or automated assembly; lower power handling on same board area.	Choose only for legacy through-hole designs or prototyping where reflow compatibility is not needed.

Compared with ZTX653 and BCP56-16, BCX56,115 delivers optimal balance of 80 V rating, 1.35 W thermal performance on SMT pads, and wide h_FE range - making it preferred for space-constrained, high-reliability battery and power management designs requiring consistent gain and low saturation loss.

Availability

BCX56,115 is available at Aetrix Electronics and suitable for linear voltage regulators, MOSFET drivers, and low-side switches requiring stable component supply in industrial automation, portable instrumentation, and embedded power subsystems.

Supply support for BCX56,115 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 high-volume, high-reliability essential components including logic, discrete, and MOSFET devices for automotive, industrial, and consumer markets.

The BCX56 series belongs to Nexperia's medium-power bipolar transistor product line, engineered for robust switching and amplification in cost-sensitive, thermally constrained applications where SMT manufacturability and parametric consistency are critical.

FAQ

What is the maximum allowable base current for BCX56,115?

The absolute maximum DC base current is 0.3 A, and peak base current is also limited to 0.3 A for pulses ≤1 ms. Exceeding this risks bond wire failure or gain degradation. For typical 1 A collector operation with h_FE ≥63, 16–20 mA base drive suffices - well within safe limits using standard 1–10 kΩ base resistors.

Can BCX56,115 be used in avalanche mode?

No - BCX56,115 is not rated or characterized for avalanche energy absorption. Its V_CEO = 80 V is a DC blocking rating with base open; operation beyond this voltage, even briefly, may cause irreversible junction breakdown. Use external clamping (e.g., TVS diode) if inductive load switching is involved.

How does thermal performance change with PCB copper area?

R_th(j-a) improves from 250 K/W (standard footprint) to 132 K/W (1 cm² collector pad) to 93 K/W (6 cm² pad). At 1 A and 0.5 V V_CE(sat), junction temperature rise drops from ~125 °C to ~66 °C to ~47 °C - directly enabling higher ambient operation or longer duty cycles without derating.

Is BCX56,115 suitable for audio preamplifier stages?

Yes - its f_T of 100–180 MHz and h_FE stability across I_C = 5–500 mA support low-noise, low-distortion small-signal amplification up to 100 kHz. However, for high-fidelity audio, dedicated low-noise transistors (e.g., BC549C) offer better h_FE uniformity and lower 1/f noise.

BCX56,115 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):: 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:: 1.25 W

Frequency - Transition:: 180MHz

Operating Temperature:: 150°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: SOT-89

BCX56,115 FAQ

1.How can I place an order for BCX56,115 through Aetrix?

Please submit a Request for Quotation (RFQ) for BCX56,115 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 BCX56,115 reliable?

The price and inventory of BCX56,115 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BCX56,115 is usually 5 days.

3.What payment methods are accepted for BCX56,115?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BCX56,115 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for BCX56,115?

BCX56,115 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your BCX56,115 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 BCX56,115?

For technical support, including BCX56,115 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BCX56,115 requirements.

6.How does Aetrix verify that BCX56,115 is sourced from the original manufacturer or authorized distributors?

All BCX56,115 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 BCX56,115 meets industry standards.

7.What is the process for return or replacement of BCX56,115?

All BCX56,115 units undergo pre-shipment inspection (PSI). If there is an issue with BCX56,115, 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 BCX56,115 part is unused and in its original packaging.

Return procedure for BCX56,115:

1.Submit a request within 90 days.

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

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