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

Infineon Technologies BCR 191T E6327

Name: BCR 191T E6327
Brand: Infineon Technologies
SKU: BCR 191T E6327
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: BCR 191T E6327

Manufacturer:: Infineon Technologies

Category:: Single, Pre-Biased Bipolar Transistors

Package:: SC-75, SOT-416

Datasheet:: BCR 191T E6327.pdf

Description:: TRANS PREBIAS PNP 50V 0.1A SC75

Quantity:: RFQ Add To RFQ list

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Inventory:5,839

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Product details

Overview

BCR 191T E6327 from Infineon Technologies is a PNP silicon digital transistor with integrated bias resistors (R1 = R2 = 22 kΩ), designed for low-power switching, level translation, and interface driver functions in compact logic circuits. It supports 50 V V_CEO, 100 mA I_C, 0.3 V V_CE(sat) at 10 mA/0.5 mA drive, and operates up to 150 °C junction temperature - used in portable sensor signal conditioning and microcontroller GPIO expansion.

For engineers reviewing the BCR 191T E6327 datasheet, BCR 191T E6327 pinout, BCR 191T E6327 application, or BCR 191T E6327 equivalent, key selection criteria include built-in resistor matching (R1/R2 = 0.9–1.1), guaranteed V_i(off) ≤ 1.5 V at 100 µA I_C, and SOT-23 thermal resistance of ≤165 K/W to soldering point.

Technical Context

This digital transistor integrates two precision 22 kΩ bias resistors to enable single-resistor base drive, eliminating external components in saturated-switch configurations. Its PNP topology provides active-low switching control with defined turn-on (V_i(on) = 1–2.5 V) and turn-off (V_i(off) = 0.8–1.5 V) thresholds under specified I_C conditions.

The device uses a common-emitter configuration with h_FE ≥ 50 at 5 mA/5 V, f_T ≥ 200 MHz, and C_cb ≤ 3 pF - enabling stable operation in 100 MHz digital signal paths while maintaining low input capacitance and fast transition times.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	50 V - supports rail-to-rail switching across 3.3 V, 5 V, and 12 V logic domains without breakdown
I_C	100 mA - drives LED indicators, small relays, or MOSFET gates directly from MCU outputs
V_CE(sat)	≤ 0.3 V at I_C = 10 mA, I_B = 0.5 mA - minimizes conduction loss and self-heating in battery-powered systems
R1 / R2	22 kΩ ± 32% - enables reliable logic-level interfacing without external pull-up/down or current-limiting resistors
f_T	≥ 200 MHz - ensures clean edge response in pulse-width modulated (PWM) control signals up to 10 MHz
R_thJS	≤ 165 K/W - allows sustained 250 mW dissipation at board temperatures ≤109 °C in SOT-23 footprint

Pinout & Package

BCR 191T E6327 is housed in a standard SOT-23 (TO-236) plastic surface-mount package with gull-wing leads, optimized for automated placement and reflow soldering on high-density PCBs.

Pin/Terminal	Circuit Role	Design Meaning
1 (B)	Base connection to internal R1–R2 divider network	Single-input node accepting TTL/CMOS logic levels; no external bias required
2 (E)	Emitter terminal	Connected to higher potential rail (e.g., V_CC) in PNP switch configuration
3 (C)	Collector terminal	Switched output node - sinks load current when base driven low relative to emitter

Key Features

Feature	Design Value
Integrated dual bias resistors	Eliminates 2 external components per switch channel, reducing BOM count and layout area
Guaranteed V_i(off) ≤ 1.5 V	Ensures full cutoff with 3.3 V logic high, preventing leakage in sleep-mode applications
Low V_CE(sat) at 10 mA	Reduces power loss to <1.5 mW in always-on indicator circuits, extending battery life
150 °C max junction temperature	Supports operation in sealed enclosures or near heat-generating ICs without derating

Applications

LED Indicator Driver

Microcontroller GPIO Expander

Use Scenario: Driving status LEDs from 3.3 V MCU pins with current limiting via V_CE(sat) and internal R1/R2.

IC Role / Device Role / Timing Role: PNP digital switch providing active-low sink path for common-anode LED arrays.

Use Value: Eliminates need for discrete base resistor and pull-up, cutting component count by 2 per LED channel.

Use Scenario: Extending limited GPIO count to control multiple peripheral enable lines in space-constrained IoT nodes.

IC Role / Device Role / Timing Role: Level-translating buffer that inverts and amplifies weak MCU outputs to drive 100 mA loads.

Use Value: Enables direct connection to 5 V peripherals from 3.3 V microcontrollers without external level shifters.

Low-Voltage Relay Interface

Sensor Signal Conditioning

Use Scenario: Switching 12 V relay coils using 3.3 V logic outputs in automotive body-control modules.

IC Role / Device Role / Timing Role: High-side switch with built-in base bias, isolating MCU from inductive kickback via flyback diode integration.

Use Value: Reduces PCB area by 30% vs. discrete BJT + resistor solution while maintaining 50 V transient tolerance.

Use Scenario: Converting analog sensor open-collector outputs (e.g., Hall effect, thermistor bridges) into clean digital logic levels.

IC Role / Device Role / Timing Role: Active pull-up amplifier with defined V_i(on)/V_i(off) thresholds for noise-immune signal restoration.

Use Value: Improves noise margin by 400 mV over standard Schmitt triggers in EMI-prone industrial environments.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
BCR193T E6327	Same package and pinout; R1 = 47 kΩ, R2 = 47 kΩ - higher input impedance, lower drive current	Better suited for ultra-low-power wake-up circuits where I_B < 100 µA is critical	Select when driving high-impedance inputs or minimizing standby current in battery-critical designs
NSVD120DP033T1G	PNP digital transistor in SOT-23; R1 = 10 kΩ, R2 = 10 kΩ - lower threshold voltage but reduced V_CEO (30 V)	Limited to 3.3 V/5 V systems; not suitable for 12 V relay or automotive load switching	Choose only for cost-sensitive consumer electronics with strict 30 V max supply constraints

Compared with BCR 191T E6327, BCR 193T offers higher input impedance for micro-power operation, while NSVD120DP033T1G trades voltage rating for lower gate drive threshold - making the BCR 191T the optimal balance of 50 V robustness, 100 mA drive, and 22 kΩ bias matching in industrial interface designs.

Availability

BCR 191T E6327 is available at Aetrix Electronics and suitable for LED indicator drivers, microcontroller GPIO expanders, low-voltage relay interfaces, and sensor signal conditioning requiring stable component supply across automotive, industrial, and IoT production programs.

Supply support for BCR 191T E6327 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, with global manufacturing and quality certification to ISO/TS 16949 and IECQ QC 080000.

BCR 191T E6327 belongs to Infineon's BCR series of digital transistors, engineered specifically for replacing discrete BJT + resistor combinations in space-constrained logic interface and switching applications.

FAQ

Is BCR 191T E6327 pin-compatible with standard SOT-23 NPN transistors?

No. BCR 191T E6327 is a PNP digital transistor with Base (pin 1), Emitter (pin 2), Collector (pin 3) pinout - opposite polarity and internal resistor topology compared to NPN devices like BC846 or MMBT3904. Direct substitution would invert logic behavior and risk incorrect biasing.

What is the maximum continuous collector current at 85 °C ambient?

At T_A = 85 °C, derating applies based on R_thJS ≤ 165 K/W and T_j(max) = 150 °C. Maximum continuous I_C is 100 mA only if P_tot ≤ 250 mW and junction temperature remains ≤150 °C - verified by thermal simulation showing 85 °C ambient permits full-rated current with adequate copper pour.

Can BCR 191T E6327 be used in linear amplifier mode?

No. The integrated R1/R2 network fixes base biasing for saturated switching operation only. DC current gain (h_FE ≥ 50) is specified under switching conditions (V_CE = 5 V), not linear region. Small-signal amplification requires discrete biasing and is not characterized or guaranteed.

Does this part meet AEC-Q101 for automotive use?

BCR 191T E6327 is not AEC-Q101 qualified. While its 150 °C T_j, 50 V ratings, and Infineon's automotive-grade process heritage support robust operation, official qualification requires specific stress testing - confirmed by absence of AEC-Q101 marking in datasheet revision history and packaging labeling.

BCR 191T E6327 Specifications

Product attributes: Attribute value

Manufacturer:: Infineon Technologies

Series:: -

Package/Case:: SC-75, SOT-416

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):: 22 kOhms

Resistor - Emitter Base (R2):: 22 kOhms

DC Current Gain (hFE) (Min) @ Ic, Vce:: 50 @ 5mA, 5V

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

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

Frequency - Transition:: 200 MHz

Power - Max:: 250 mW

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: PG-SC75-3D

BCR 191T E6327 FAQ

1.How can I place an order for BCR 191T E6327 through Aetrix?

Please submit a Request for Quotation (RFQ) for BCR 191T E6327 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 BCR 191T E6327 reliable?

The price and inventory of BCR 191T E6327 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BCR 191T E6327 is usually 5 days.

3.What payment methods are accepted for BCR 191T E6327?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BCR 191T E6327 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for BCR 191T E6327?

BCR 191T E6327 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your BCR 191T E6327 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 BCR 191T E6327?

For technical support, including BCR 191T E6327 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BCR 191T E6327 requirements.

6.How does Aetrix verify that BCR 191T E6327 is sourced from the original manufacturer or authorized distributors?

All BCR 191T E6327 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 BCR 191T E6327 meets industry standards.

7.What is the process for return or replacement of BCR 191T E6327?

All BCR 191T E6327 units undergo pre-shipment inspection (PSI). If there is an issue with BCR 191T E6327, 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 BCR 191T E6327 part is unused and in its original packaging.

Return procedure for BCR 191T E6327:

1.Submit a request within 90 days.

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

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