Infineon Technologies BCR 133L3 E6327

Overview

BCR 133L3 E6327 from Infineon Technologies is an NPN silicon digital transistor with integrated bias resistors (R1 = R2 = 10 kΩ), designed for low-power switching in interface and drive circuits. 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 ≥ 30 at 5 mA/5 V - used in logic-level signal translation and microcontroller GPIO buffering.

For engineers reviewing the BCR 133L3 E6327 datasheet, BCR 133L3 E6327 pinout, BCR 133L3 E6327 application, or BCR 133L3 E6327 equivalent, this part serves as a single-NPN resistor-equipped switch optimized for space-constrained PCBs where discrete base-resistor networks are impractical and thermal performance at T_S ≤ 135°C must be maintained.

Technical Context

This device integrates two precision-matched resistors (R1/R2 = 0.9–1.1) directly into the emitter-base path, enabling direct TTL/CMOS logic-level drive without external bias components. Its SOT23-3 package supports surface-mount assembly and delivers R_thJS ≤ 60 K/W for sustained 250 mW dissipation up to 135°C case temperature.

The transistor operates in common-emitter configuration with guaranteed V_i(on) ≤ 2.5 V and V_i(off) ≥ 0.8 V, ensuring robust noise margin in 3.3 V and 5 V digital systems. Transition frequency f_T = 130 MHz supports fast edge handling in pulse-width modulation and clock buffering applications.

Key Specifications

Pinout & Package

BCR 133L3 E6327 is housed in a standard SOT23-3 plastic package with gull-wing leads, optimized for automated placement and reflow soldering. The package footprint conforms to JEDEC TO-236AB and supports thermal relief via exposed pad (not electrically connected).

Key Features

Applications

Equivalent & Alternatives

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

Compared with BC847BLT1G and NSVD120DP033T1G, BCR 133L3 E6327 offers fixed 1:1 biasing ideal for standardized 3.3 V/5 V logic interfacing, delivering lowest BOM overhead and highest thermal efficiency (R_thJS ≤ 60 K/W) in compact SOT23-3 layouts.

Availability

BCR 133L3 E6327 is available at Aetrix Electronics and suitable for industrial HMI panels, IoT sensor nodes, automotive body-control modules, and consumer appliance control boards requiring stable component supply and long-term lifecycle support.

Supply support for BCR 133L3 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 over 30 years of discrete transistor innovation.

BCR 133L3 E6327 belongs to Infineon's BCR series of digital transistors - engineered specifically for replacing discrete resistor-transistor combinations in cost-sensitive, high-volume digital interface applications.

FAQ

What is the maximum continuous collector current for BCR 133L3 E6327?

The absolute maximum continuous collector current is 100 mA, specified under conditions where case temperature does not exceed 135°C and power dissipation remains within the 250 mW limit. Derating applies above 25°C ambient, and pulsed operation permits higher peak currents if duty cycle and pulse width comply with the P_totmax/P_totDC curves in the datasheet.

Can BCR 133L3 E6327 replace a standard 2N3904 with external base resistors?

Yes - it functions equivalently in saturated-switch applications, but with key differences: internal 10 kΩ R1/R2 sets fixed base current, eliminating external components. Unlike 2N3904, it lacks linear amplification optimization and has tighter V_i(on)/V_i(off) thresholds, making it better suited for digital on/off control than analog gain stages.

Is the SOT23-3 package of BCR 133L3 E6327 lead-free and RoHS compliant?

Yes - BCR 133L3 E6327 is manufactured in accordance with RoHS Directive 2011/65/EU and uses lead-free solderable terminations. The SOT23-3 package meets JEDEC J-STD-020 moisture sensitivity level 1 (MSL-1), allowing unlimited floor life at ≤30°C/60% RH without dry-pack requirements.

Does BCR 133L3 E6327 support bidirectional signal translation?

No - it is a unidirectional NPN digital transistor configured for low-side switching only. The internal resistor network connects base to V_CC through R1 and to emitter through R2, preventing reverse current paths or emitter-follower operation. For bidirectional level shifting, dedicated analog switches or MOSFET-based translators are required.