Infineon Technologies BCR146T E6327

Overview

BCR146T E6327 from Infineon Technologies is an NPN silicon digital transistor with integrated bias resistors (R1 = 47 kΩ, R2 = 22 kΩ), designed for low-power switching, level-shifting, and interface driver applications in compact consumer and industrial control circuits. It supports 50 V V_CEO, 70 mA I_C, 0.3 V V_CE(sat) at 10 mA/0.5 mA drive, and operates up to 150 °C junction temperature.

For engineers reviewing the BCR146T E6327 datasheet, BCR146T E6327 pinout, BCR146T E6327 application, or BCR146T E6327 equivalent, key selection criteria include its built-in resistor ratio (R1/R2 ≈ 2.14), SOT-23 package thermal resistance (R_thJS ≤ 165 K/W), and guaranteed V_i(on) ≤ 4.0 V at 2 mA load - critical for reliable 3.3 V/5 V logic interfacing.

Technical Context

This digital transistor integrates two precision bias resistors to eliminate external components in saturated-switch configurations. Its common-emitter DC current gain (h_FE) is specified ≥50 at I_C = 5 mA and V_CE = 5 V, enabling predictable turn-on behavior without base current calculation.

The device features a 3-pin SOT-23 package with confirmed pinout: Pin 1 = Base (with internal R1–R2 network), Pin 2 = Emitter, Pin 3 = Collector. Thermal performance is characterized by junction-to-solder-point resistance ≤165 K/W, supporting continuous operation at T_S ≤ 109 °C.

Key Specifications

Pinout & Package

BCR146T E6327 is housed in a standard SOT-23 (TSFP-3) plastic surface-mount package, measuring 2.9 mm × 1.3 mm × 1.0 mm, optimized for automated placement and reflow soldering.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BC847B,215, BCR146T E6327 reduces component count and layout area; compared with NSV146T1G, it offers lower saturation voltage and tighter thermal derating - making it optimal for space-constrained 3.3 V logic interfaces with moderate current demands.

Availability

BCR146T E6327 is available at Aetrix Electronics and suitable for LED indicator drivers, microcontroller GPIO expansion, level-shifting interfaces, and power supply enable switching requiring stable component supply and long-term industrial availability.

Supply support for BCR146T 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 devices, with global manufacturing and quality certification to ISO/TS 16949 and ISO 9001.

BCR146T E6327 belongs to Infineon's BCR series of digital transistors, engineered specifically for cost-sensitive, high-volume logic interface and switching applications in consumer electronics and industrial controls.

FAQ

Is BCR146T E6327 RoHS compliant and halogen-free?

Yes, BCR146T E6327 meets RoHS Directive 2011/65/EU and is certified halogen-free per IEC 61249-2-21. The SOT-23 package uses lead-free matte tin plating, and material declarations confirm absence of brominated flame retardants and chlorine-based compounds.

Can BCR146T E6327 replace a standard NPN transistor like BC847 in existing designs?

Only with schematic modification: BCR146T E6327 integrates base resistors, so removing external R_B and connecting the microcontroller directly to Pin 1 is required. Direct substitution without circuit change will cause incorrect biasing or failure to saturate.

What is the maximum switching frequency supported by BCR146T E6327?

With f_T = 150 MHz typical and V_CE(sat) < 0.3 V, BCR146T E6327 supports clean digital switching up to 10–20 MHz under light capacitive loads (<100 pF). For repetitive pulse operation, ensure duty cycle and pulse width stay within permissible P_totmax/P_totDC curves shown in datasheet Figure 8.

Does BCR146T E6327 support reverse-voltage protection on the base input?

No. Pin 1 has no intrinsic reverse-polarity protection. Applying negative voltage beyond –0.3 V relative to Pin 2 (emitter) risks damaging the internal R1–R2 junction. External series diode or clamping is required if bidirectional signal coupling is needed.