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

Nexperia USA Inc. BCX56-10,135

Name: BCX56-10,135
Brand: Nexperia USA Inc.
SKU: BCX56-10,135
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: BCX56-10,135

Manufacturer:: Nexperia USA Inc.

Category:: Single Bipolar Transistors

Package:: TO-243AA

Datasheet:: BCX56-10,135.pdf

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

Quantity:: RFQ Add To RFQ list

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Inventory:80

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Product details

Overview

BCX56-10,135 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 DC current gain (h_FE) of 63–160 at I_C = 150 mA, V_CE = 2 V. It serves as a low-side switch or MOSFET driver in battery-powered power management circuits.

For engineers reviewing the BCX56-10,135 datasheet, BCX56-10,135 pinout, BCX56-10,135 application, or BCX56-10,135 equivalent, this device is selected for linear voltage regulation, amplifier stages, and discrete switching where thermal performance on FR4 PCBs with 1 cm² collector pad (P_tot = 0.95 W) must be balanced against gain consistency and saturation voltage.

Technical Context

This transistor operates in active and saturation regions with verified V_CE(sat) ≤ 0.5 V at I_C = 500 mA and I_B = 50 mA, and exhibits f_T = 100–180 MHz under V_CE = 5 V, I_C = 50 mA conditions - confirming suitability for medium-frequency switching and analog amplification.

Its thermal resistance R_th(j-a) is 132 K/W when mounted on FR4 with 1 cm² collector pad, and junction temperature is limited to 150 °C; absolute maximum ratings include V_CBO = 100 V and V_EBO = 5 V, supporting robust operation in unregulated input rails and ESD-prone interfaces.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	80 V - Maximum safe collector-emitter voltage with base open; enables use in 48 V and 60 V nominal systems.
I_C	1 A continuous - Supports load switching up to ~12 W at 12 V with adequate heatsinking.
h_FE	63–160 @ V_CE = 2 V, I_C = 150 mA - Tighter gain band than BCX56 (63–250), improving bias stability in linear regulators.
V_CE(sat)	≤ 0.5 V @ I_C = 500 mA, I_B = 50 mA - Limits conduction loss to ≤ 250 mW in saturated switching applications.
P_tot	0.95 W @ T_amb ≤ 25 °C, 1 cm² collector pad - Defines practical power handling on standard FR4 without metal-core PCB.
f_T	100–180 MHz - Confirms usable bandwidth for audio preamps and PWM gate driving up to ~10 MHz.

Pinout & Package

SOT89 (SC-62) plastic surface-mount package: 4.5 mm × 2.5 mm × 1.5 mm body, 1.5 mm lead pitch, with collector tab thermally and electrically connected to Pin 2.

Pin/Terminal	Circuit Role	Design Meaning
1	Emitter (E)	Reference node for current flow; connects to ground or low-side return path in switch configurations.
2	Collector (C)	Main power output terminal; large copper area provides thermal path and current capacity up to 1 A DC.
3	Base (B)	Control input requiring ~50 mA drive for full saturation at 500 mA load; high-impedance in cutoff.

Key Features

Feature	Design Value
Three h_FE variants	BCX56-10 (63–160), BCX56-16 (100–250), BCX56 (63–250) - Enables precise bias selection across production lots and temperature ranges.
High P_tot scalability	1.35 W achievable with 6 cm² collector pad - Doubles usable power vs. standard footprint, reducing need for external heatsinks.
Low V_CE(sat)	≤ 0.5 V at I_C/I_B = 10 - Minimizes voltage drop and self-heating in battery-fed low-voltage switches.
Robust breakdown ratings	V_CBO = 100 V, V_EBO = 5 V - Allows safe operation with transient spikes up to 80 V and interface with 3.3 V/5 V logic.

Applications

Linear Voltage Regulators

MOSFET Drivers

Use Scenario: Discrete pass transistor in adjustable 3-terminal linear regulators delivering up to 1 A at 5–24 V output.

IC Role / Device Role / Timing Role: Series pass element controlling output voltage via base bias; operates in active region with thermal feedback.

Use Value: Stable dropout performance with <0.5 V V_CE(sat) at full load ensures ≥95% efficiency at 5 V output with 6 V input.

Use Scenario: Level-shifting and current-boosting stage driving N-channel power MOSFET gates in DC-DC converters.

IC Role / Device Role / Timing Role: Low-impedance switch turning gate capacitance on/off; driven by microcontroller GPIO or PWM controller.

Use Value: 100–180 MHz f_T supports clean 1–5 MHz gate drive edges; 1 A I_C rating handles >1 nF gate loads with <100 ns rise time.

Low-Side Switches

Battery-Driven Devices

Use Scenario: Load control for solenoids, relays, or LED strings in industrial I/O modules powered from 12–48 V rails.

IC Role / Device Role / Timing Role: Ground-referenced switch sinking load current; driven by optocoupler or logic-level signal.

Use Value: 80 V V_CEO withstands inductive kickback up to 60 V; 2 A I_CM peak rating tolerates motor startup surges.

Use Scenario: Power-path control in portable medical monitors, handheld test equipment, and wireless sensors operating from Li-ion or alkaline batteries.

IC Role / Device Role / Timing Role: Enable/disable function for subsystems (e.g., display backlight, sensor bias, RF module); duty-cycled for power savings.

Use Value: Low I_CEO (<10 µA at 150 °C) minimizes standby drain; SOT89 footprint saves board space vs. TO-92 in compact enclosures.

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
BCX56-16,135	h_FE = 100–250 @ I_C = 150 mA - higher minimum gain, wider spread	Better for precision biasing in low-noise amplifiers; less predictable in high-temp switching	Select when tighter base drive control is needed at light loads, but verify saturation at high temperature.
ZTX653STZ	V_CEO = 60 V, I_C = 1 A, h_FE = 100–800 - lower voltage rating, wider gain range, SOT89-3 package	Not suitable for 48 V systems; preferred in 24 V automotive accessory modules with wide ambient range	Choose only if system max rail ≤ 50 V and gain variability is acceptable; verify R_th(j-a) = 175 K/W limits power density.

Compared with BCX56-10,135, BCX56-16,135 offers higher minimum h_FE for improved bias stability but reduced gain consistency, while ZTX653STZ trades voltage headroom for broader gain range and lower thermal performance - making BCX56-10 optimal for 48 V industrial switching with predictable drive requirements.

Availability

BCX56-10,135 is available at Aetrix Electronics and suitable for linear voltage regulators, MOSFET drivers, and low-side switches requiring stable component supply in industrial automation, test equipment, and battery-powered instrumentation.

Supply support for BCX56-10,135 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 consumer markets.

BCX56-10,135 belongs to Nexperia's medium-power bipolar transistor product line, engineered for robust switching and linear operation in cost-sensitive, space-constrained power management applications.

FAQ

What is the maximum allowable junction temperature for BCX56-10,135?

The absolute maximum junction temperature (T_j) is 150 °C per IEC 60134 limiting values. Operation above this threshold causes irreversible degradation. Derating is required above 25 °C ambient - for example, at 75 °C ambient, maximum P_tot drops to ~0.6 W with 1 cm² collector pad, based on R_th(j-a) = 132 K/W.

Can BCX56-10,135 replace BCX56-16,135 in existing designs?

Yes, but with design verification: BCX56-10 has lower h_FE (63–160 vs. 100–250), so base drive current may need increase to maintain saturation at high I_C. Also, V_CE(sat) may rise slightly under identical bias - measure at worst-case temperature and current before substitution.

Is BCX56-10,135 suitable for automotive applications?

No - it is not AEC-Q101 qualified and lacks automotive-specific testing or qualification. The datasheet explicitly states non-automotive qualification, and thermal derating curves assume industrial ambient profiles (−55 °C to +150 °C), not automotive temperature cycling or vibration requirements.

What is the recommended PCB layout for optimal thermal performance?

Use a 1 cm² copper pour connected directly to Pin 2 (collector) with ≥2 thermal vias to inner/ground layers. Follow Nexperia's reflow footprint (Fig. 11): 2.25 mm × 1.2 mm solder land for Pin 2, 0.7 mm × 0.6 mm for Pins 1 and 3, with 1.5 mm pitch. Avoid solder mask over collector pad to maximize thermal conduction.

BCX56-10,135 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

BCX56-10,135 FAQ

1.How can I place an order for BCX56-10,135 through Aetrix?

Please submit a Request for Quotation (RFQ) for BCX56-10,135 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 BCX56-10,135 reliable?

The price and inventory of BCX56-10,135 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BCX56-10,135 is usually 5 days.

3.What payment methods are accepted for BCX56-10,135?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BCX56-10,135 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for BCX56-10,135?

BCX56-10,135 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your BCX56-10,135 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 BCX56-10,135?

For technical support, including BCX56-10,135 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BCX56-10,135 requirements.

6.How does Aetrix verify that BCX56-10,135 is sourced from the original manufacturer or authorized distributors?

All BCX56-10,135 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 BCX56-10,135 meets industry standards.

7.What is the process for return or replacement of BCX56-10,135?

All BCX56-10,135 units undergo pre-shipment inspection (PSI). If there is an issue with BCX56-10,135, 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 BCX56-10,135 part is unused and in its original packaging.

Return procedure for BCX56-10,135:

1.Submit a request within 90 days.

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

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