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

Infineon Technologies BCW61AE6327HTSA1

Name: BCW61AE6327HTSA1
Brand: Infineon Technologies
SKU: BCW61AE6327HTSA1
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: BCW61AE6327HTSA1

Manufacturer:: Infineon Technologies

Category:: Single Bipolar Transistors

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

Datasheet:: BCW61AE6327HTSA1.pdf

Description:: TRANS PNP 32V 0.1A PG-SOT23

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Product details

Overview

BCW61AE6327HTSA1 from Infineon Technologies is a PNP silicon small-signal transistor designed for audio-frequency input stages and driver circuits. It delivers h_FE = 120–180 (at I_C = 2 mA, V_CE = 5 V), V_CEO = 32 V, V_CE(sat) ≤ 0.25 V (I_C = 50 mA, I_B = 1.25 mA), and low noise of 2 dB (I_C = 200 µA, f = 1 kHz). It is used in compact audio preamplifier bias networks and discrete BJT-based level-shifting interfaces.

For engineers reviewing the BCW61AE6327HTSA1 datasheet, BCW61AE6327HTSA1 pinout, BCW61AE6327HTSA1 application, or BCW61AE6327HTSA1 equivalent, key selection criteria include DC current gain grouping (h_FE-grp. A/G), SOT23 thermal resistance (R_thJS ≤ 240 K/W), low-noise operation below 15 kHz, and AEC-Q101 qualification for automotive-grade reliability.

Technical Context

This transistor operates as a linear PNP amplifier with fixed-emitter biasing capability. Its h_FE variation across I_C (20–500 at I_C = 10 µA to 50 mA) supports stable gain in low-power analog front-ends, while its f_T = 250 MHz enables bandwidth headroom beyond AF range.

The device uses epitaxial base construction to achieve low V_CE(sat) and high h_FE consistency. Its C_cb = 1.5 pF and C_eb = 8 pF define high-frequency stability limits, and its R_thJS ≤ 240 K/W governs thermal derating above T_S = 71 °C.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	32 V - Maximum collector-emitter voltage before breakdown under open-base conditions; sets safe operating voltage for low-voltage audio rails.
h_FE (I_C = 2 mA)	120–180 - Confirmed DC current gain range for h_FE-grp. A/G; ensures predictable bias point in emitter-follower configurations.
V_CE(sat)	≤ 0.25 V @ I_C = 50 mA - Low saturation voltage minimizes power loss and heating in switching or saturated-driver applications.
f_T	250 MHz - Transition frequency confirms usable gain up to ~100 MHz; supports wideband feedback compensation.
Noise Figure	2 dB @ 1 kHz - Measured low-noise performance critical for microphone preamp and sensor signal conditioning stages.
R_thJS	≤ 240 K/W - Junction-to-solder-point thermal resistance defines PCB copper pad requirements for thermal management.
AEC-Q101 Qualified	Yes - Validated for automotive electronics per stress-test standard; enables use in infotainment and body control modules.

Pinout & Package

BCW61AE6327HTSA1 is housed in a RoHS-compliant SOT23 plastic surface-mount package with gull-wing leads, optimized for automated placement and reflow soldering on dense PCBs.

Pin/Terminal	Circuit Role	Design Meaning
1 (Emitter)	E	Current sink terminal; connects to higher-potential rail in common-emitter or common-base topologies.
2 (Base)	B	Control input; requires current-limited drive (I_B ≤ 200 µA DC) to avoid thermal runaway.
3 (Collector)	C	Output node; carries load current and must be routed with adequate trace width for I_C ≤ 100 mA continuous.

Key Features

Feature	Design Value
Low-noise AF operation	2 dB NF at 1 kHz enables clean amplification in microphone and piezo sensor interfaces without added filtering.
High h_FE consistency	120–180 at I_C = 2 mA ensures stable quiescent current in discrete bias networks across temperature.
Low V_CE(sat)	≤ 0.25 V reduces conduction loss by >40% vs. standard PNP transistors at 50 mA, improving efficiency in driver stages.
AEC-Q101 qualification	Validated for automotive ambient temperatures (−40 °C to +150 °C junction), supporting under-hood and dashboard designs.

Applications

Audio Preamp Stage

Level-Shifting Interface

Use Scenario: Amplifying weak signals from electret microphones or magnetic pickups in portable audio devices.

IC Role / Device Role / Timing Role: PNP small-signal amplifier in common-emitter configuration with emitter degeneration for linearity.

Use Value: 2 dB noise figure and h_FE ≥ 120 ensure high SNR and stable gain without active bias compensation.

Use Scenario: Translating logic-level signals between 3.3 V microcontrollers and 5 V analog subsystems.

IC Role / Device Role / Timing Role: Discrete PNP level shifter with base resistor network enabling bidirectional voltage translation.

Use Value: V_CEO = 32 V and low V_CE(sat) allow reliable operation across industrial supply ranges with minimal propagation delay.

Automotive Sensor Bias

LED Driver Current Sink

Use Scenario: Providing stable bias current to Hall-effect or thermistor-based sensors in vehicle cabin modules.

IC Role / Device Role / Timing Role: Constant-current source using emitter resistor feedback and h_FE-stable PNP topology.

Use Value: AEC-Q101 qualification and h_FE consistency over −40 °C to +125 °C ensure long-term calibration stability.

Use Scenario: Driving indicator LEDs in industrial HMIs where precise current control is required without IC drivers.

IC Role / Device Role / Timing Role: Linear current sink with base-controlled I_C regulation in common-collector configuration.

Use Value: V_CE(sat) ≤ 0.25 V minimizes power dissipation at 20–50 mA, reducing thermal stress on PCB traces.

Equivalent & Alternatives

The following parts are listed as comparable options for similar PNP small-signal transistor applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
BCW61B E6327HTSA1	h_FE = 180–250 (h_FE-grp. B/H); otherwise identical ratings and pinout.	Higher gain improves loop gain in high-impedance feedback amplifiers but increases sensitivity to thermal drift.	Select when tighter h_FE matching or higher open-loop gain is required in precision bias networks.
BCX71J E6327HTSA1	V_CEO = 45 V; same SOT23 package and pinout; h_FE = 250–380 (h_FE-grp. J/K).	Higher breakdown voltage supports 24 V industrial bus interfaces; higher h_FE may require revised base resistors.	Choose for 24 V systems or where extended voltage margin and higher gain are needed without footprint change.

Compared with BCW61AE6327HTSA1, BCW61B offers higher gain for improved signal integrity in low-noise preamps, while BCX71J provides greater voltage headroom and gain for 24 V industrial interfaces-both retain SOT23 compatibility and AEC-Q101 qualification.

Availability

BCW61AE6327HTSA1 is available at Aetrix Electronics and suitable for audio preamplifiers, automotive sensor bias networks, and LED driver current sinks requiring stable component supply and AEC-Q101 compliance.

Supply support for BCW61AE6327HTSA1 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

Infineon Technologies is a German semiconductor manufacturer specializing in power management, automotive electronics, and industrial control ICs and discrete devices.

BCW61AE6327HTSA1 belongs to Infineon's BCW/BCX family of general-purpose bipolar transistors, engineered for high-reliability analog signal conditioning and interface functions in automotive and industrial environments.

FAQ

What is the maximum continuous collector current for BCW61AE6327HTSA1?

The absolute maximum continuous collector current is 100 mA at T_S ≤ 71 °C. Derating applies above this temperature: total power dissipation drops linearly to zero at 150 °C junction temperature, governed by R_thJS ≤ 240 K/W. Pulse operation up to 200 mA is allowed for t_p ≤ 10 ms with duty cycle D ≤ 2%.

Is BCW61AE6327HTSA1 suitable for automotive applications?

Yes-it is fully qualified to AEC-Q101 standards, including stress testing for temperature cycling, humidity, and mechanical shock. Its guaranteed operation from −40 °C to +150 °C junction temperature and Pb-free RoHS-compliant SOT23 package make it approved for use in automotive infotainment, body electronics, and sensor modules.

How does the h_FE grouping affect circuit design?

BCW61AE6327HTSA1 is h_FE-grp. A/G, specifying h_FE = 120–180 at I_C = 2 mA and V_CE = 5 V. This tight grouping allows predictable DC biasing without individual transistor sorting, simplifying production of audio amplifiers and current sources where gain tolerance directly impacts offset and linearity.

Can BCW61AE6327HTSA1 replace BCW61B in an existing design?

Yes, with minor verification: both share identical pinout, package, and absolute maximum ratings. However, BCW61B has h_FE = 180–250, so bias resistors may need adjustment to maintain the same I_C. Thermal performance and noise figure remain unchanged, making it a drop-in upgrade where higher gain is beneficial.

BCW61AE6327HTSA1 Specifications

Product attributes: Attribute value

Manufacturer:: Infineon Technologies

Series:: -

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

Packaging:: Tape & Reel (TR)

Product Status:: Obsolete

Transistor Type:: PNP

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

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

Vce Saturation (Max) @ Ib, Ic:: 550mV @ 1.25mA, 50mA

Current - Collector Cutoff (Max):: 20nA (ICBO)

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

Power - Max:: 330 mW

Frequency - Transition:: 250MHz

Operating Temperature:: 150°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: PG-SOT23

BCW61AE6327HTSA1 FAQ

1.How can I place an order for BCW61AE6327HTSA1 through Aetrix?

Please submit a Request for Quotation (RFQ) for BCW61AE6327HTSA1 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 BCW61AE6327HTSA1 reliable?

The price and inventory of BCW61AE6327HTSA1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BCW61AE6327HTSA1 is usually 5 days.

3.What payment methods are accepted for BCW61AE6327HTSA1?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BCW61AE6327HTSA1 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for BCW61AE6327HTSA1?

BCW61AE6327HTSA1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your BCW61AE6327HTSA1 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 BCW61AE6327HTSA1?

For technical support, including BCW61AE6327HTSA1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BCW61AE6327HTSA1 requirements.

6.How does Aetrix verify that BCW61AE6327HTSA1 is sourced from the original manufacturer or authorized distributors?

All BCW61AE6327HTSA1 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 BCW61AE6327HTSA1 meets industry standards.

7.What is the process for return or replacement of BCW61AE6327HTSA1?

All BCW61AE6327HTSA1 units undergo pre-shipment inspection (PSI). If there is an issue with BCW61AE6327HTSA1, 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 BCW61AE6327HTSA1 part is unused and in its original packaging.

Return procedure for BCW61AE6327HTSA1:

1.Submit a request within 90 days.

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

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