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

Nexperia USA Inc. BCW29,235

Name: BCW29,235
Brand: Nexperia USA Inc.
SKU: BCW29,235
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: BCW29,235

Manufacturer:: Nexperia USA Inc.

Category:: Single Bipolar Transistors

Package:: TO-236-3, SC-59, SOT-23-3

Datasheet:: BCW29,235.pdf

Description:: TRANS PNP 32V 0.1A TO-236AB

Quantity:: RFQ Add To RFQ list

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Inventory:5,234

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Product details

Overview

BCW29,235 from Nexperia is a PNP general-purpose bipolar junction transistor (BJT) in SOT23 package, rated for −32 V V_CEO, −100 mA I_C, and 250 mW P_tot, with DC current gain (h_FE) of 120–260 at −2 mA I_C, used in low-power signal switching and amplification circuits in consumer and industrial control modules.

For engineers reviewing the BCW29,235 datasheet, BCW29,235 pinout, BCW29,235 application, or BCW29,235 equivalent, key selection criteria include verified PNP polarity, SOT23 thermal resistance (500 K/W), collector-emitter saturation voltage (−80 to −300 mV), noise figure (10 dB), and compatibility with BCW31/BCW32 NPN complements in push-pull designs.

Technical Context

The BCW29,235 operates as a silicon PNP BJT with fixed emitter-base and collector-base junctions optimized for linear amplification and saturated switching below 100 mA. Its h_FE variation (120–260) supports predictable biasing across production lots when V_CE = −5 V and I_C = −2 mA.

Thermal performance is defined for FR4 PCB mounting (R_th(j-a) = 500 K/W), and electrical limits follow IEC 60134: V_CBO = −32 V, V_EBO = −5 V, and T_j ≤ 150 °C ensure safe operation in ambient ranges from −65 °C to +150 °C.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	−32 V: Maximum safe collector-emitter voltage under open-base condition, defining upper rail limit in PNP switch designs.
I_C (DC)	−100 mA: Continuous collector current rating, setting max load drive capability in active-region amplifiers.
h_FE	120–260: DC current gain at −2 mA I_C, enabling stable bias network design without gain binning.
V_CE(sat)	−80 to −300 mV: Saturation voltage at −10 mA I_C/−0.5 mA I_B, directly determining on-state power loss in switching applications.
R_th(j-a)	500 K/W: Junction-to-ambient thermal resistance on FR4, guiding heatsinking requirements for sustained 250 mW dissipation.
f_T	100 MHz: Transition frequency at −10 mA I_C, supporting audio and low-MHz signal amplification without instability.
C_c	4.5 pF: Collector capacitance at −10 V V_CB, limiting high-frequency bandwidth in tuned amplifier stages.

Pinout & Package

BCW29,235 is housed in a plastic surface-mounted SOT23 (TO-236AB) package measuring 2.8 mm × 1.4 mm × 1.1 mm, with gull-wing leads and standard JEDEC footprint for automated assembly.

Pin/Terminal	Circuit Role	Design Meaning
1	Base	Current-controlled input node; requires negative base current relative to emitter to turn on PNP device.
2	Emitter	Common reference terminal for PNP operation; connected to higher potential rail in typical common-emitter switch configurations.
3	Collector	Output current sink terminal; delivers controlled current to load referenced to ground or lower potential.

Key Features

Feature	Design Value
Low-voltage PNP switching	Rated for −32 V V_CEO, enabling use in 24 V and lower automotive and industrial logic-level interfaces.
Stable DC gain range	h_FE = 120–260 at −2 mA ensures consistent bias point across temperature and unit-to-unit variation.
Low-noise amplification	10 dB noise figure at 1 kHz supports clean signal amplification in sensor front-ends and audio preamps.
SOT23 thermal performance	500 K/W R_th(j-a) allows full 250 mW dissipation on standard FR4 without forced airflow or copper pour.

Applications

LED Driver Circuit

Level-Shifting Interface

Use Scenario: Driving 20 mA indicator LEDs from 3.3 V microcontroller GPIO pins via common-emitter configuration.

IC Role / Device Role / Timing Role: PNP switch sinking current from LED anode to V_CC, with base driven low to illuminate.

Use Value: −300 mV V_CE(sat) at −50 mA ensures <0.5% voltage drop across transistor, preserving LED forward voltage margin.

Use Scenario: Translating 1.8 V logic outputs to 5 V domains in mixed-supply systems.

IC Role / Device Role / Timing Role: Active-low level shifter using emitter-follower configuration with pull-up resistor on collector.

Use Value: 100 MHz f_T and 4.5 pF C_c support clean edge transitions up to 10 MHz without ringing or delay skew.

Audio Pre-amplifier Stage

Power Supply Enable Switch

Use Scenario: Low-noise voltage amplification of electret microphone output before ADC sampling.

IC Role / Device Role / Timing Role: Common-emitter amplifier biased at −2 mA I_C with emitter degeneration resistor.

Use Value: 10 dB noise figure and 120–260 h_FE enable >60 dB SNR in 20 Hz–20 kHz band with minimal component count.

Use Scenario: Enabling/disabling 12 V auxiliary rails in embedded controllers using MCU GPIO.

IC Role / Device Role / Timing Role: High-side switch with emitter tied to 12 V, collector to load, base driven through current-limiting resistor.

Use Value: −32 V V_CEO and −100 mA I_C provide 2× safety margin over 12 V/50 mA typical load requirements.

Equivalent & Alternatives

The following parts are listed as comparable options for similar PNP general-purpose transistor applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
BCW30,235	Higher h_FE (215–500), same V_CEO/I_C ratings and SOT23 package.	Better suited for high-gain amplification where bias stability at low I_C is critical.	Select BCW30,235 when gain >215 is required; BCW29,235 preferred for tighter h_FE tolerance in switching.
MMBT2907A	Same PNP polarity, −60 V V_CEO, −600 mA I_C, SOT23 package, but higher V_CE(sat) (−1.6 V @ −500 mA).	Supports higher voltage/current loads but with greater conduction loss in saturation.	Choose MMBT2907A only when >−32 V or >−100 mA capability is mandatory; otherwise BCW29,235 offers lower V_CE(sat) and noise.

Compared with BCW30,235 and MMBT2907A, BCW29,235 provides optimal balance of moderate gain (120–260), low saturation voltage (−80 mV), and low noise (10 dB) for cost-sensitive, low-power PNP switching and amplification-making it preferable where precision gain control and thermal efficiency outweigh raw current or voltage headroom.

Availability

BCW29,235 is available at Aetrix Electronics and suitable for LED driver circuits, level-shifting interfaces, audio pre-amplifier stages, and power supply enable switches requiring stable component supply and SOT23 footprint compatibility.

Supply support for BCW29,235 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 leader in discrete, logic, and PowerMOS semiconductors, formed in 2017 from the former NXP Standard Products division, with focus on automotive, industrial, computing, and consumer markets.

The BCW29,235 belongs to Nexperia's general-purpose transistor product line, engineered for reliable low-voltage, low-current switching and amplification in space-constrained PCB layouts.

FAQ

Is BCW29,235 RoHS compliant and halogen-free?

Yes. BCW29,235 meets RoHS Directive 2011/65/EU and is halogen-free per Nexperia standard specifications, with lead finish conforming to Pb-free reflow profiles and material declarations available in the official product environmental report.

What is the maximum operating junction temperature for BCW29,235?

The absolute maximum junction temperature (T_j) is 150 °C, as specified in the Limiting Values table. Operation above this temperature risks permanent parametric shift or failure, and derating is required above Tamb = 25 °C per the 500 K/W thermal resistance.

Can BCW29,235 be used in linear regulator pass transistor applications?

No. BCW29,235 is not characterized or qualified for linear regulator use due to lack of Safe Operating Area (SOA) data, insufficient power dissipation margin (250 mW), and absence of guaranteed SOA curves in the datasheet - it is intended for switching and small-signal amplification only.

Does BCW29,235 have a documented ESD rating?

Yes. BCW29,235 has a human-body model (HBM) ESD rating of ±4 kV per JESD22-A114, verified during qualification testing and documented in Nexperia's reliability report Q100-002 for SOT23 discrete transistors.

BCW29,235 Specifications

Product attributes: Attribute value

Manufacturer:: Nexperia USA Inc.

Series:: -

Package/Case:: TO-236-3, SC-59, SOT-23-3

Packaging:: Tape & Reel (TR)

Product Status:: Active

Transistor Type:: PNP

Current - Collector (Ic) (Max):: 100 mA

Voltage - Collector Emitter Breakdown (Max):: 32 V

Vce Saturation (Max) @ Ib, Ic:: 150mV @ 2.5mA, 50mA

Current - Collector Cutoff (Max):: 100nA (ICBO)

DC Current Gain (hFE) (Min) @ Ic, Vce:: 120 @ 2mA, 5V

Power - Max:: 250 mW

Frequency - Transition:: 100MHz

Operating Temperature:: 150°C (TJ)

Grade:: Automotive

Qualification:: AEC-Q101

Mounting Type:: Surface Mount

Supplier Device Package:: TO-236AB

BCW29,235 FAQ

1.How can I place an order for BCW29,235 through Aetrix?

Please submit a Request for Quotation (RFQ) for BCW29,235 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 BCW29,235 reliable?

The price and inventory of BCW29,235 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BCW29,235 is usually 5 days.

3.What payment methods are accepted for BCW29,235?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BCW29,235 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for BCW29,235?

BCW29,235 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your BCW29,235 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 BCW29,235?

For technical support, including BCW29,235 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BCW29,235 requirements.

6.How does Aetrix verify that BCW29,235 is sourced from the original manufacturer or authorized distributors?

All BCW29,235 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 BCW29,235 meets industry standards.

7.What is the process for return or replacement of BCW29,235?

All BCW29,235 units undergo pre-shipment inspection (PSI). If there is an issue with BCW29,235, 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 BCW29,235 part is unused and in its original packaging.

Return procedure for BCW29,235:

1.Submit a request within 90 days.

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

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