Send an Inquiry

To receive a quote for your project, please fill in the following information, and we’ll get back to you promptly.

Submit Inventory List

Please fill in the following information, and we’ll get back to you promptly.

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

Infineon Technologies BCR166WH6327XTSA1

Name: BCR166WH6327XTSA1
Brand: Infineon Technologies
SKU: BCR166WH6327XTSA1
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

Compare

Part No.:: BCR166WH6327XTSA1

Manufacturer:: Infineon Technologies

Category:: Single, Pre-Biased Bipolar Transistors

Package:: SC-70, SOT-323

Datasheet:: BCR166WH6327XTSA1.pdf

Description:: TRANS PREBIAS PNP 50V SOT323

Quantity:: RFQ Add To RFQ list

Payment:

Shipping:

Inventory:8,349

Please send an inquiry. Send us your inquiry, and we will respond immediately.

Product details

Overview

BCR166WH6327XTSA1 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 BCR166WH6327XTSA1 datasheet, BCR166WH6327XTSA1 pinout, BCR166WH6327XTSA1 application, or BCR166WH6327XTSA1 equivalent, this part supports robust low-side switching in 12 V automotive logic interfaces, offers predictable turn-on/off thresholds (V_i(on) = 0.5–1.4 V, V_i(off) = 0.4–0.8 V), and delivers stable h_FE ≥ 70 at 5 mA/5 V.

Technical Context

This digital transistor integrates two on-chip resistors to simplify base drive requirements-R1 connects base to input, R2 provides base-emitter pull-down-enabling direct microcontroller GPIO interfacing without external bias components. Its PNP topology allows active-low control of loads referenced to V_CC.

Rated for operation up to T_j = 150 °C and qualified per AEC-Q101, it supports automotive ambient conditions. The SOT323 package delivers R_thJS ≤ 105 K/W, enabling higher continuous power (P_tot = 250 mW at T_S ≤ 124 °C) than the SOT23 variant.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	50 V - Maximum collector-emitter voltage before breakdown; enables use in 24 V automotive supply rails with margin.
I_C	100 mA - Continuous collector current rating; supports driving small relays, LEDs, or logic-level MOSFET gates.
V_CE(sat)	≤ 0.3 V at I_C = 10 mA / I_B = 0.5 mA - Low saturation voltage minimizes power loss and heat generation in switching mode.
R1 / R2	4.7 kΩ / 47 kΩ - Integrated bias network sets defined input threshold and ensures reliable cutoff; eliminates 2 external resistors.
f_T	160 MHz - Transition frequency confirms suitability for high-speed digital switching up to ~10–20 MHz edge rates.
AEC-Q101	Qualified - Meets stress test requirements for automotive electronics, including temperature cycling, HTRB, and ESD.

Pinout & Package

BCR166WH6327XTSA1 is housed in a RoHS-compliant SOT323 (SC-70) plastic surface-mount package, measuring 2.1 mm × 1.25 mm × 0.9 mm, optimized for high-density PCB layouts and automated assembly.

Pin/Terminal	Circuit Role	Design Meaning
1 (B)	Base	Input node connected internally to R1 (4.7 kΩ) and R2 (47 kΩ); accepts TTL/CMOS logic-level signals directly.
2 (E)	Emitter	Common emitter terminal; tied to V_CC in typical PNP switch configuration; defines reference for input thresholds.
3 (C)	Collector	Output node switched to V_CC when off, pulled low when on; drives load between collector and ground.

Key Features

Feature	Design Value
Integrated R1/R2 bias network	Eliminates external base resistors; reduces BOM count and layout area while ensuring consistent switching behavior across temperature.
AEC-Q101 qualification	Validated for automotive under-hood applications including engine control modules and body electronics with extended temperature and reliability requirements.
V_i(on)/V_i(off) specification	Guaranteed input thresholds (0.5–1.4 V on, 0.4–0.8 V off) enable reliable interfacing with 3.3 V and 5 V microcontrollers without level-shifting.
SOT323 thermal performance	R_thJS ≤ 105 K/W allows 250 mW dissipation at board temperature ≤124 °C-critical for compact, sealed enclosures.

Applications

Automotive Door Module Switching

Industrial PLC Input Buffer

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

IC Role / Device Role / Timing Role: PNP digital switch providing active-low load control referenced to 12 V battery rail.

Use Value: Integrated bias resistors ensure clean turn-off during microcontroller reset; AEC-Q101 rating guarantees operation at −40 °C to +125 °C junction temperature.

Use Scenario: Converting 24 V field sensor signals to 3.3 V logic levels for FPGA or ARM-based controller inputs.

IC Role / Device Role / Timing Role: Level-shifting interface transistor with defined input hysteresis via R1/R2 ratio.

Use Value: V_i(off) ≤ 0.8 V prevents false triggering from noise; V_CE(sat) ≤ 0.3 V keeps output compatible with CMOS input thresholds.

LED Driver for Dashboard Backlight

Smart Actuator Enable Circuit

Use Scenario: Controlling parallel strings of white LEDs (3.2 V forward) in instrument cluster backlighting.

IC Role / Device Role / Timing Role: Constant-current switch operating in linear region with current set by external emitter resistor.

Use Value: h_FE ≥ 70 at 5 mA ensures stable gain across temperature; f_T = 160 MHz supports PWM dimming up to 20 kHz without phase lag.

Use Scenario: Enabling 5 V solenoid valves in HVAC actuators based on CAN message commands.

IC Role / Device Role / Timing Role: Final-stage driver isolating MCU GPIO from inductive load transients.

Use Value: C_cb = 3 pF limits capacitive coupling from collector to base; R_thJS ≤ 105 K/W sustains 100% duty cycle at 85 °C ambient.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
BCR168WH6327XTSA1	Same package and bias values (R1 = 4.7 kΩ, R2 = 47 kΩ), but h_FE min = 160 vs. 70; higher gain improves drive margin at low I_B.	Preferred where microcontroller GPIO current is limited (< 0.2 mA) or where tighter V_CE(sat) consistency is required.	Select BCR168W if system requires higher DC gain without changing layout or bill of materials.
NSVBC166WT1G	Identical electrical specs and SOT323 footprint; manufactured by onsemi; AEC-Q101 qualified; same R1/R2 and V_CEO/I_C ratings.	Drop-in second source with identical thermal and switching performance; supported by different logistics channels.	Choose NSVBC166WT1G for supply chain diversification while maintaining full functional and mechanical compatibility.

Compared with BCR166WH6327XTSA1, BCR168WH6327XTSA1 offers higher h_FE for improved low-current drive, while NSVBC166WT1G provides identical performance with alternate sourcing-both preserve pinout, thermal profile, and AEC-Q101 compliance.

Availability

BCR166WH6327XTSA1 is available at Aetrix Electronics and suitable for automotive body electronics, industrial PLC input stages, LED backlight drivers, and smart actuator enable circuits requiring stable component supply and AEC-Q101 assurance.

Supply support for BCR166WH6327XTSA1 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 discrete devices, with global R&D and manufacturing infrastructure.

This part belongs to Infineon's BCRx family of digital transistors-engineered specifically for simplified, reliable switching in automotive and industrial control nodes where space, reliability, and qualification matter.

FAQ

What is the maximum allowable base-emitter reverse voltage for BCR166WH6327XTSA1?

The maximum input reverse voltage (V_i(rev)) is specified as 5 V. This rating applies across the base-emitter junction when the input is driven negative relative to emitter, such as during ESD events or signal undershoot. Exceeding 5 V risks permanent damage to the internal R2 resistor or BE junction.

Can BCR166WH6327XTSA1 be used in linear amplification mode?

No-it is not characterized or guaranteed for linear amplifier operation. Its datasheet specifies only switching parameters (V_CE(sat), h_FE at fixed I_C/V_CE, transition frequency), and the integrated resistors limit bias flexibility. Use discrete transistors like BC807 for analog gain stages.

Is the SOT323 package of BCR166WH6327XTSA1 compatible with reflow soldering per J-STD-020?

Yes-the SOT323 package is rated for standard lead-free reflow profiles. Peak temperature must not exceed 260 °C for ≤ 30 seconds, with ramp-up ≤ 3 °C/s and ramp-down ≤ 6 °C/s. The device's MSL level is 1, meaning unlimited floor life at ≤ 30 °C/60% RH.

How does the built-in R1/R2 ratio affect noise immunity in automotive environments?

The R1/R2 ratio of 0.1 (typical) sets hysteresis between V_i(on) and V_i(off), yielding ~0.3 V of input threshold separation. This inherent hysteresis rejects short-duration noise spikes common in 12 V vehicle electrical systems, preventing unintended switching during load dump or alternator ripple events.

BCR166WH6327XTSA1 Specifications

Product attributes: Attribute value

Manufacturer:: Infineon Technologies

Series:: -

Package/Case:: SC-70, SOT-323

Packaging:: Tape & Reel (TR)

Product Status:: Discontinued at Digi-Key

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:: 250 mW

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: PG-SOT323

BCR166WH6327XTSA1 FAQ

1.How can I place an order for BCR166WH6327XTSA1 through Aetrix?

Please submit a Request for Quotation (RFQ) for BCR166WH6327XTSA1 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 BCR166WH6327XTSA1 reliable?

The price and inventory of BCR166WH6327XTSA1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BCR166WH6327XTSA1 is usually 5 days.

3.What payment methods are accepted for BCR166WH6327XTSA1?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BCR166WH6327XTSA1 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for BCR166WH6327XTSA1?

BCR166WH6327XTSA1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your BCR166WH6327XTSA1 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 BCR166WH6327XTSA1?

For technical support, including BCR166WH6327XTSA1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BCR166WH6327XTSA1 requirements.

6.How does Aetrix verify that BCR166WH6327XTSA1 is sourced from the original manufacturer or authorized distributors?

All BCR166WH6327XTSA1 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 BCR166WH6327XTSA1 meets industry standards.

7.What is the process for return or replacement of BCR166WH6327XTSA1?

All BCR166WH6327XTSA1 units undergo pre-shipment inspection (PSI). If there is an issue with BCR166WH6327XTSA1, 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 BCR166WH6327XTSA1 part is unused and in its original packaging.

Return procedure for BCR166WH6327XTSA1:

1.Submit a request within 90 days.

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

Tech Hub

2026-08-18 Operational Amplifier (Op Amp): Basics, Configurations, Feedback and Applications

Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…

2026-08-14 Jumper Cables: How to Use, Connect and Choose Them Safely

Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…

2026-08-11 LDO Regulator: Dropout Voltage, Noise, PSRR and Power Dissipation

LDO regulator guide covering low dropout voltage, power dissipation, thermal design, PSRR, output noise, capacitor stability, adjustable LDO circuits, LDO vs buck converter and datasheet selection chec…

2026-08-06 Conditional Access Module: CAM, CI/CI+ and DVB Security

Conditional Access Module guide covering CAM meaning, CI/CI+ interface, smart card authorization, DVB security workflow, TV and set-top box compatibility, internal electronics, ESD protection, connecto…

2026-08-03 Electronic Component Obsolescence: EOL Risks, Replacement Options and Last-Time Buy Strategy

Guide to electronic component obsolescence covering EOL risk, PCN/PDN notices, last-time buy planning, replacement options, form-fit-function validation, counterfeit risk and BOM lifecycle management.

2026-07-29 18650 Battery: Voltage, Capacity, Charging and Pack Design

18650 battery guide covering lithium-ion cell basics, 3.6V/3.7V voltage, 4.2V charging, mAh and Wh capacity, protected cells, chargers, BMS, series-parallel packs, holders, welding and sourcing checks.…

2026-07-27 Hall Effect Sensor: Working Principle, Types, Circuits and Applications

Hall effect sensor guide covering working principle, linear and digital sensors, Arduino circuits, current sensing, speed detection, automotive applications, A3144 examples, signal filtering and datash…

2026-07-20 Product Change Notification (PCN) in Electronic Components: Meaning and Supply Chain Response

Product Change Notification guide for electronic components, covering PCN meaning, PCN vs PDN/EOL, common change types, risk levels, form-fit-function review, engineering validation, BOM control, LTB/L…

2026-07-19 Blend Door Actuator: Symptoms, Location, Reset and Replacement Guide

A practical guide to blend door actuators, covering HVAC function, symptoms, location, AC and heater issues, reset and calibration, replacement cost, electrical diagnosis, compatibility checks, and rep…

2026-07-17 Raspberry Pi Alternatives: Chip-Level Comparison, Compatibility and Replacement Guide

Engineering guide to Raspberry Pi alternatives, covering chip-level differences, Orange Pi, ROCK, Jetson, Banana Pi, NanoPi, Compute Module, Pico, GPIO, camera, HAT compatibility, and replacement risks…