Infineon BTS621L1: High-Side Smart Switch for Automotive and Industrial Applications

The Infineon BTS621L1 is a state-of-the-art high-side power switch engineered to meet the rigorous demands of modern automotive and industrial systems. As a member of Infineon’s PROFET™ (Protected MOSFET) family of smart switches, it integrates advanced protection, diagnostics, and control features into a compact package, providing a highly reliable solution for driving resistive or inductive loads.

Designed for 12 V automotive environments, the BTS621L1 is capable of controlling loads such as lamps, motors, solenoids, and heaters. It supports continuous currents up to 1.35 A and operates with a very low standby current, making it suitable for applications where energy efficiency is critical. The device is built using Infineon’s proprietary SMART7 technology, which enables robust performance and enhanced diagnostic capabilities.

A key strength of the BTS621L1 is its comprehensive suite of integrated protection features. These include protection against over-load, short-circuit, over-temperature, and over-voltage conditions. The device also provides diagnostic feedback such as current sense and status flag signals, which allow microcontrollers to monitor the switch’s operating state in real time. This enables predictive maintenance and rapid fault response, essential for safety-critical systems.

The device is offered in a PG-SOT223-6 package, which offers good thermal performance and facilitates easy PCB mounting. Its ability to operate in harsh electrical environments—with high immunity to electrostatic discharge (ESD) and transient voltages—makes it a durable choice for automotive and industrial applications.

Typical use cases include body control modules, power seat controllers, HVAC systems, and industrial automation equipment. By reducing the need for external components and simplifying design, the BTS621L1 helps lower system cost and improve overall reliability.

ICGOFIND

The Infineon BTS621L1 is a highly integrated high-side switch offering robust protection, accurate diagnostics, and efficient performance for 12 V DC systems. Its combination of reliability and intelligence makes it an excellent choice for automotive and industrial switching applications.

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Keywords:

High-Side Switch, Automotive Applications, Over-Current Protection, Diagnostic Feedback, PROFET™ Smart Switch