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

Infineon Technologies BCR 185T E6327

Name: BCR 185T E6327
Brand: Infineon Technologies
SKU: BCR 185T E6327
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: BCR 185T E6327

Manufacturer:: Infineon Technologies

Category:: Single, Pre-Biased Bipolar Transistors

Package:: SC-75, SOT-416

Datasheet:: BCR 185T E6327.pdf

Description:: TRANS PREBIAS PNP 50V 0.1A SC75

Quantity:: RFQ Add To RFQ list

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Product details

Overview

BCR 185T E6327 from Infineon Technologies is a PNP silicon digital transistor with integrated bias resistors (R1 = 10 kΩ, R2 = 47 kΩ), designed for switching, inverting, and interface driver functions in low-power logic-level circuits. It operates with 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 is packaged in SOT-23.

For engineers reviewing the BCR 185T E6327 datasheet, BCR 185T E6327 pinout, BCR 185T E6327 application, or BCR 185T E6327 equivalent, key selection criteria include built-in resistor ratio (R1/R2 = 0.21), guaranteed V_i(on) ≤ 1.4 V at I_C = 2 mA, thermal resistance R_thJS ≤ 165 K/W, and compatibility with 3.3 V/5 V logic interfacing.

Technical Context

This device integrates a single PNP bipolar junction transistor with two on-chip bias resistors forming a current-limited input network-R1 connects base to input, R2 connects base to emitter-enabling direct logic-level drive without external components. Its h_FE ≥ 70 at I_C = 5 mA ensures reliable saturation under standard microcontroller GPIO sourcing.

The SOT-23 package supports surface-mount assembly in space-constrained applications, and its specified V_i(off) ≥ 0.5 V at I_C = 100 µA provides noise-immune turn-off behavior in noisy industrial environments. Junction temperature rating of 150 °C allows operation in extended ambient conditions.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	50 V - maximum allowable collector-emitter voltage before breakdown in common-emitter switch configuration
I_C	100 mA - continuous DC collector current handling capacity under thermal limits
V_CE(sat)	≤ 0.3 V at I_C = 10 mA / I_B = 0.5 mA - low saturation voltage enables efficient power switching with minimal voltage drop
R1 / R2	10 kΩ / 47 kΩ (ratio 0.21) - fixed internal bias network eliminates need for external pull-up/pull-down resistors
f_T	200 MHz - transition frequency confirms suitability for high-speed digital switching up to ~20–30 MHz edge rates
R_thJS	≤ 165 K/W - junction-to-solder-point thermal resistance defines maximum power dissipation at given board layout and copper area

Pinout & Package

BCR 185T E6327 is housed in a standard SOT-23 (TO-236) plastic surface-mount package with three terminals. Pin 1 is Base (B), Pin 2 is Emitter (E), and Pin 3 is Collector (C).

Pin/Terminal	Circuit Role	Design Meaning
1 (Base)	Input node connected to internal R1 and R2 network	Accepts logic-level signal; internal resistors set base current automatically for predictable saturation
2 (Emitter)	Common emitter reference terminal	Connected to system ground or low-side return path; forms current sink output stage
3 (Collector)	Switched output terminal	Sinks load current when saturated; rated for 50 V and 100 mA continuous operation

Key Features

Feature	Design Value
Integrated bias network	R1 = 10 kΩ, R2 = 47 kΩ - reduces BOM count and PCB footprint by eliminating two external resistors
Guaranteed logic-compatible input	V_i(on) ≤ 1.4 V at I_C = 2 mA - ensures reliable turn-on with 3.3 V CMOS or TTL outputs
No external base resistor required	Self-biased configuration - simplifies design for GPIO-driven loads such as LEDs, relays, and small solenoids
High DC current gain	h_FE ≥ 70 at I_C = 5 mA - supports robust saturation even with weak drive sources

Applications

LED Driver Circuit

Microcontroller GPIO Interface

Use Scenario: Driving discrete indicator LEDs or low-current LED arrays from embedded MCU pins.

IC Role / Device Role / Timing Role: Current-sinking switch controlled directly by 3.3 V or 5 V GPIO output.

Use Value: Eliminates need for external base resistor; V_CE(sat) ≤ 0.3 V minimizes voltage loss across transistor, maximizing LED forward voltage margin.

Use Scenario: Level-shifting and isolation between mixed-voltage logic domains (e.g., 1.8 V MCU to 5 V peripheral).

IC Role / Device Role / Timing Role: Active-low level translator and current amplifier for open-drain or push-pull signals.

Use Value: Guaranteed V_i(off) ≥ 0.5 V prevents false triggering from noise; h_FE ≥ 70 ensures full saturation with low-drive GPIOs.

Relay Driver Stage

Power Supply Enable Switch

Use Scenario: Controlling small electromagnetic relays (≤ 100 mA coil current) in industrial control modules.

IC Role / Device Role / Timing Role: Low-side switch enabling relay coil energization via grounded return path.

Use Value: Built-in R1/R2 ensures consistent base current regardless of supply tolerance; 50 V V_CEO accommodates relay flyback transients.

Use Scenario: Enabling/disabling auxiliary power rails (e.g., 3.3 V or 5 V subsystems) in battery-powered IoT nodes.

IC Role / Device Role / Timing Role: High-side or low-side enable switch controlled by PMIC or system controller.

Use Value: Low V_CE(sat) reduces dropout and self-heating during sustained conduction; SOT-23 footprint supports compact power management layouts.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
BCR190T E6327	Higher V_CEO = 60 V; same R1/R2 values; slightly lower h_FE min = 60	Better suited for higher-voltage relay or solenoid drivers where transient margin exceeds 50 V	Select when flyback energy or supply rail overshoot requires >50 V blocking capability
NSV11201MT1G	PNP digital transistor with R1 = 10 kΩ, R2 = 10 kΩ (ratio = 1.0); V_CEO = 50 V; I_C = 100 mA	Different bias ratio results in higher base current draw and faster switching but reduced noise immunity	Prefer when fast turn-off is prioritized over noise rejection in clean signal environments

Compared with BCR185T E6327, BCR190T offers enhanced voltage headroom while maintaining identical biasing, whereas NSV11201MT1G trades noise-immune turn-off for higher base drive and speed-making each suitable for distinct reliability vs. speed trade-offs.

Availability

BCR 185T E6327 is available at Aetrix Electronics and suitable for LED driver circuits, microcontroller GPIO interfaces, relay driver stages, and power supply enable switches requiring stable component supply and long-term industrial availability.

Supply support for BCR 185T 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 ICs, and discrete power devices, with global manufacturing and quality certification to ISO/TS 16949 and ISO 9001 standards.

BCR 185T E6327 belongs to Infineon's BCR family of digital transistors, engineered specifically for cost-sensitive, high-volume logic interface and switching applications in consumer, industrial, and automotive electronics.

FAQ

Is BCR 185T E6327 compatible with 3.3 V microcontroller GPIOs?

Yes. With V_i(on) ≤ 1.4 V at I_C = 2 mA and guaranteed turn-on at 3.3 V logic levels, it reliably saturates using standard CMOS outputs. Its built-in R1/R2 network draws ~0.33 mA base current from a 3.3 V source, well within typical GPIO sink capability.

What is the maximum continuous power dissipation at 25 °C ambient?

At T_S = 25 °C, the maximum continuous power dissipation is 250 mW per the derating curve for BCR185T. However, due to its R_thJS ≤ 165 K/W, actual usable power depends on PCB copper area and solder joint thermal path; at T_J = 150 °C, P_tot drops to ~200 mW.

Can BCR 185T E6327 replace a standard PNP BJT like BC807?

It can functionally replace BC807 in switching roles but requires no external base resistor-unlike BC807, which needs discrete biasing. This simplifies layout but fixes the base drive ratio; if variable gain or adjustable switching threshold is needed, a discrete BJT remains preferable.

Does BCR 185T E6327 have AEC-Q101 qualification for automotive use?

No. BCR 185T E6327 is not AEC-Q101 qualified. While its 150 °C T_J rating supports under-hood temperatures, Infineon does not list this variant in its AEC-Q101-qualified portfolio. For automotive applications, consider the AEC-Q101-certified BCR185W variant instead.

BCR 185T 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):: 10 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:: 200 MHz

Power - Max:: 250 mW

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: PG-SC75-3D

BCR 185T E6327 FAQ

1.How can I place an order for BCR 185T E6327 through Aetrix?

Please submit a Request for Quotation (RFQ) for BCR 185T 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 185T E6327 reliable?

The price and inventory of BCR 185T 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 185T E6327 is usually 5 days.

3.What payment methods are accepted for BCR 185T E6327?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BCR 185T E6327 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for BCR 185T E6327?

BCR 185T E6327 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your BCR 185T 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 185T E6327?

For technical support, including BCR 185T E6327 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BCR 185T E6327 requirements.

6.How does Aetrix verify that BCR 185T E6327 is sourced from the original manufacturer or authorized distributors?

All BCR 185T 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 185T E6327 meets industry standards.

7.What is the process for return or replacement of BCR 185T E6327?

All BCR 185T E6327 units undergo pre-shipment inspection (PSI). If there is an issue with BCR 185T 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 185T E6327 part is unused and in its original packaging.

Return procedure for BCR 185T E6327:

1.Submit a request within 90 days.

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

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