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Home > Products > Discrete Semiconductor Products > Transistors > Bipolar (BJT) > Single, Pre-Biased Bipolar Transistors

Infineon Technologies BCR166B6327HTLA1

Name: BCR166B6327HTLA1
Brand: Infineon Technologies
SKU: BCR166B6327HTLA1
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: BCR166B6327HTLA1

Manufacturer:: Infineon Technologies

Category:: Single, Pre-Biased Bipolar Transistors

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

Datasheet:: BCR166B6327HTLA1.pdf

Description:: TRANS PREBIAS PNP 50V SOT23

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Product details

Overview

BCR166B6327HTLA1 from Infineon Technologies is a PNP silicon digital transistor with integrated bias resistors (R1 = 4.7 kΩ, R2 = 47 kΩ), designed for switching, inverting, interface, and driver circuits in automotive and industrial control systems. It features V_CEO = 50 V, I_C = 100 mA, V_CE(sat) ≤ 0.3 V at I_C = 10 mA/I_B = 0.5 mA, and AEC-Q101 qualification.

For engineers reviewing the BCR166B6327HTLA1 datasheet, BCR166B6327HTLA1 pinout, BCR166B6327HTLA1 application, or BCR166B6327HTLA1 equivalent, this part supports reliable low-power logic-level interfacing, discrete load switching, and embedded signal conditioning where built-in resistor networks reduce PCB footprint and component count.

Technical Context

This digital transistor integrates two precision on-chip resistors to form a single-base-biased PNP switch, eliminating external bias components. Its R1/R2 ratio of 0.1 ensures stable turn-on/turn-off thresholds across temperature (–40°C to 125°C) and supply variations.

The device operates in common-emitter configuration with h_FE ≥ 70 at I_C = 5 mA/V_CE = 5 V, and delivers f_T = 160 MHz for moderate-speed switching up to ~10 MHz. Thermal resistance R_thJS ≤ 240 K/W (SOT23) enables operation at T_J = 150°C under defined board conditions.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	50 V - Maximum collector-emitter voltage before breakdown; supports 24 V and 36 V automotive rail switching.
I_C	100 mA - Continuous collector current rating; suitable for driving LEDs, relays, and small solenoids.
V_CE(sat)	≤ 0.3 V at I_C/I_B = 20 - Low saturation voltage minimizes power loss and self-heating in high-duty-cycle switching.
R1 / R2	4.7 kΩ / 47 kΩ - Integrated bias network enables direct TTL/CMOS logic-level drive without external resistors.
f_T	160 MHz - Transition frequency confirms usable bandwidth for pulse-width modulation and digital signal routing up to 10 MHz.
AEC-Q101	Qualified - Meets stress-test requirements for automotive electronics, including temperature cycling and HTRB.

Pinout & Package

BCR166B6327HTLA1 is packaged in SOT23 (TO-236AB), a surface-mount plastic case with 3 terminals and standard tape-and-reel packaging (3,000 pcs/reel, ø180 mm).

Pin/Terminal	Circuit Role	Design Meaning
1 (Base)	Input node connected to internal R1–R2 divider	Accepts logic-level input; internal biasing sets operating point automatically.
2 (Emitter)	PNP emitter terminal	Connected to higher potential rail (e.g., +5 V or +12 V); current flows from emitter to collector.
3 (Collector)	Output node	Sinks load current to ground; compatible with open-collector logic interfaces and active-low drivers.

Key Features

Feature	Design Value
Integrated bias resistors	R1 = 4.7 kΩ ±30 %, R2 = 47 kΩ ±30 % - Eliminates two external components and associated layout area.
Low V_CE(sat)	≤ 0.3 V at I_C = 10 mA - Reduces conduction loss by >60 % vs. standard PNP transistors without biasing.
Automotive qualification	AEC-Q101 compliant - Validated for use in engine control modules, body electronics, and ADAS sensor interfaces.
Thermal robustness	R_thJS ≤ 240 K/W - Enables stable operation at T_S ≤ 102°C on standard FR-4 PCBs with minimal copper area.

Applications

Automotive Door Module

Industrial PLC Output Stage

Use Scenario: Driving window lift motor enable signals and mirror fold/unfold relays in door control units.

IC Role / Device Role / Timing Role: Digital switch translating microcontroller GPIO outputs into 12 V load control paths.

Use Value: Built-in R1/R2 eliminates need for discrete biasing, reducing BOM count and improving ESD immunity over bare transistors.

Use Scenario: Isolating and amplifying 24 V DC output signals from PLC CPU to field actuators.

IC Role / Device Role / Timing Role: Level-shifting interface between low-voltage logic and industrial 24 V control rails.

Use Value: V_CEO = 50 V and AEC-Q101 qualification ensure reliability in electrically noisy factory environments.

LED Status Indicator Driver

USB-C Power Path Control

Use Scenario: Driving multi-color status LEDs on embedded system front panels with shared MCU I/O pins.

IC Role / Device Role / Timing Role: Current-sinking switch enabling independent LED on/off control via logic-high base input.

Use Value: V_CE(sat) ≤ 0.3 V maintains consistent LED brightness across supply voltage drift (4.5–5.5 V).

Use Scenario: Enabling/disabling V_CONN or V_BUS power paths in USB-C port controllers during cable insertion detection.

IC Role / Device Role / Timing Role: Fast-turning discrete switch responding to <1 µs logic pulses from USB PD policy engines.

Use Value: f_T = 160 MHz and low C_cb = 3 pF minimize propagation delay and capacitive loading on critical timing lines.

Equivalent & Alternatives

The following parts are listed as comparable options for similar PNP digital transistor applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
BCR198B6327HTMA1	Higher V_CEO = 80 V; same R1/R2 values; SOT23 package	Better suited for 48 V industrial bus interfaces and higher-voltage relay coils	Select when system rail exceeds 50 V or long-term reliability at elevated voltage stress is required.
NSV11201MT1G	PNP digital transistor with R1 = 10 kΩ, R2 = 100 kΩ; SOT23; AEC-Q101 qualified	Higher input impedance reduces MCU GPIO loading but requires higher Vi(on) threshold (~0.8 V min)	Prefer when driving from weak-sourcing microcontrollers or where lower input current (<1 µA standby) is critical.

Compared with BCR198B6327HTMA1 and NSV11201MT1G, BCR166B6327HTLA1 offers optimal balance of voltage margin, saturation performance, and logic compatibility for 12–24 V automotive and industrial switching-without sacrificing thermal headroom or footprint efficiency.

Availability

BCR166B6327HTLA1 is available at Aetrix Electronics and suitable for automotive body control modules, industrial PLC output stages, and embedded LED driver circuits requiring stable component supply and AEC-Q101 compliance.

Supply support for BCR166B6327HTLA1 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 AG is a German semiconductor manufacturer specializing in power management, automotive ICs, and industrial control solutions, with global manufacturing and quality certification infrastructure.

BCR166B6327HTLA1 belongs to Infineon's BCR series of digital transistors, engineered specifically for space-constrained, high-reliability switching in automotive and industrial environments where simplified biasing and AEC-Q101 validation are mandatory.

FAQ

What is the maximum allowable junction temperature for BCR166B6327HTLA1?

The absolute maximum junction temperature (T_J) is 150°C, as specified in the Infineon datasheet. Operation above this limit risks permanent degradation of h_FE, increased leakage, and premature failure. Derating curves in Figure 4 confirm safe power dissipation limits down to T_S = 102°C for SOT23 mounting on standard PCBs.

Can BCR166B6327HTLA1 be used in linear amplifier configurations?

No-it is optimized for switching operation only. The integrated R1/R2 network fixes the base bias point, preventing adjustable quiescent current setting. Its h_FE variation with I_C (Figure 3) and lack of linearity specifications confirm it is not intended for analog amplification.

Is BCR166B6327HTLA1 RoHS-compliant and lead-free?

Yes-BCR166B6327HTLA1 is explicitly marked Pb-free and RoHS-compliant per the August 2011 datasheet revision. The SOT23 package uses matte tin (Sn) termination, and all homogeneous materials meet EU Directive 2011/65/EU Annex II substance restrictions.

How does the built-in R1/R2 resistor network affect input drive requirements?

The R1/R2 network sets Vi(on) = 0.5–1.4 V and Vi(off) = 0.4–0.8 V, allowing direct connection to 3.3 V or 5 V logic outputs without level shifters. Input current is ~1 mA at Vi(on), reducing MCU GPIO loading versus discrete-base designs while maintaining noise immunity via hysteresis-like behavior.

BCR166B6327HTLA1 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 - Pre-Biased

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

Voltage - Collector Emitter Breakdown (Max):: 50 V

Resistor - Base (R1):: 4.7 kOhms

Resistor - Emitter Base (R2):: 47 kOhms

DC Current Gain (hFE) (Min) @ Ic, Vce:: 70 @ 5mA, 5V

Vce Saturation (Max) @ Ib, Ic:: 300mV @ 500µA, 10mA

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

Frequency - Transition:: 160 MHz

Power - Max:: 200 mW

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: PG-SOT23

BCR166B6327HTLA1 FAQ

1.How can I place an order for BCR166B6327HTLA1 through Aetrix?

Please submit a Request for Quotation (RFQ) for BCR166B6327HTLA1 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 BCR166B6327HTLA1 reliable?

The price and inventory of BCR166B6327HTLA1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BCR166B6327HTLA1 is usually 5 days.

3.What payment methods are accepted for BCR166B6327HTLA1?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BCR166B6327HTLA1 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for BCR166B6327HTLA1?

BCR166B6327HTLA1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your BCR166B6327HTLA1 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 BCR166B6327HTLA1?

For technical support, including BCR166B6327HTLA1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BCR166B6327HTLA1 requirements.

6.How does Aetrix verify that BCR166B6327HTLA1 is sourced from the original manufacturer or authorized distributors?

All BCR166B6327HTLA1 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 BCR166B6327HTLA1 meets industry standards.

7.What is the process for return or replacement of BCR166B6327HTLA1?

All BCR166B6327HTLA1 units undergo pre-shipment inspection (PSI). If there is an issue with BCR166B6327HTLA1, 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 BCR166B6327HTLA1 part is unused and in its original packaging.

Return procedure for BCR166B6327HTLA1:

1.Submit a request within 90 days.

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

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