Infineon Technologies BCR 135T E6327

Overview

BCR 135T E6327 from Infineon Technologies is an NPN silicon digital transistor with integrated bias resistors (R1 = 10 kΩ, R2 = 47 kΩ), designed for low-power switching, interface, and inverter circuits in space-constrained applications. 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 h_FE ≥ 70 at I_C = 5 mA/V_CE = 5 V, commonly used in LED driver stages and microcontroller GPIO-level signal translation.

For engineers reviewing the BCR 135T E6327 datasheet, BCR 135T E6327 pinout, BCR 135T E6327 application, or BCR 135T E6327 equivalent, key selection criteria include built-in resistor ratio (R1/R2 = 0.21 typ.), thermal resistance (R_thJS ≤ 165 K/W), SOT-323 package footprint, and guaranteed V_i(on)/V_i(off) thresholds for reliable logic-level switching.

Technical Context

This digital transistor integrates two precision bias resistors to eliminate external components in saturated-switch configurations. Its monolithic NPN structure supports common-emitter switching with fixed base biasing, enabling direct connection to 3.3 V or 5 V logic outputs without current-limiting resistors.

The device operates within a junction temperature range of –65 °C to 150 °C and delivers stable DC current gain (h_FE) across I_C = 0.1–10 mA, with transition frequency f_T = 150 MHz ensuring adequate bandwidth for PWM-driven loads up to ~100 kHz.

Key Specifications

Pinout & Package

BCR 135T E6327 is housed in a SOT-323 (SC-70) plastic surface-mount package, measuring 2.1 mm × 1.25 mm × 0.95 mm, optimized for automated placement and reflow soldering in compact consumer and industrial PCBs.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BCR 135T E6327, the BCR135S offers channel duplication at the cost of larger footprint, while the NSVD120DP03MX trades integrated biasing for higher voltage rating-neither provides identical single-channel, resistor-ratio-optimized performance in SOT-323.

Availability

BCR 135T E6327 is available at Aetrix Electronics and suitable for LED indicator drivers, microcontroller GPIO expanders, low-voltage relay interfaces, and USB port power switches requiring stable component supply and long-term production continuity.

Supply support for BCR 135T 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 IATF 16949.

The BCR135 series belongs to Infineon's digital transistor product line, engineered specifically for reducing bill-of-materials and PCB area in logic-level interface and switching applications across consumer, industrial, and automotive domains.

FAQ

What is the maximum operating temperature for BCR 135T E6327?

The junction temperature limit is 150 °C, and the storage temperature range spans –65 °C to +150 °C. At ambient temperatures up to 85 °C, the device sustains full 100 mA collector current when mounted on a standard FR-4 PCB with 1 cm² copper pour, per its R_thJS ≤ 165 K/W specification and derated P_tot curve.

Can BCR 135T E6327 replace a standard NPN transistor like BC847?

No-it cannot serve as a drop-in replacement for general-purpose transistors like BC847 because it includes internal bias resistors and lacks a standalone base terminal. Using it without accounting for R1/R2 will cause incorrect biasing. It is intended only for digital switching applications where those resistors are part of the functional design.

Is the SOT-323 package lead-free and RoHS compliant?

Yes, BCR 135T E6327 is manufactured in a lead-free, RoHS-compliant SOT-323 package per Infineon's standard qualification. The "E6327" suffix denotes tape-and-reel packaging with green (halogen-free) molding compound and matte tin (Sn) lead finish meeting JEDEC J-STD-020 moisture sensitivity level 1.

Does BCR 135T E6327 support PWM dimming of LEDs?

Yes-its 150 MHz f_T and ≤ 0.3 V V_CE(sat) support clean PWM switching up to at least 100 kHz. For 1–10 kHz LED dimming, it delivers minimal dead-time distortion and negligible thermal drift due to stable h_FE across I_C = 1–20 mA, making it suitable for handheld and display backlight control.