Infineon BTS442E2: High-Current PROFET™ Smart Switch for Automotive and Industrial Applications

The Infineon BTS442E2 is a robust and highly integrated single-channel high-side power switch from Infineon’s PROFET™ (Protected MOSFET) family. Designed to meet the stringent requirements of both automotive and industrial environments, this smart switch combines exceptional load control capabilities with comprehensive protection features, making it a reliable solution for driving high-current resistive, inductive, and capacitive loads.

At its core, the BTS442E2 is built to handle continuous currents up to 23A, with a very low typical on-state resistance (RDS(on)) of just 16 mΩ. This high efficiency minimizes power dissipation and reduces thermal stress, which is crucial for energy-sensitive and space-constrained applications. The device operates from a wide supply voltage range of 5.5 V to 40 V, supporting both 12 V and 24 V battery systems commonly used in vehicles and industrial machinery.

A key strength of the PROFET™ technology is its advanced diagnostic and protection functionality. The device integrates multiple safeguards, including overload protection, short-circuit protection, and overtemperature shutdown, which ensure operational safety and enhance system longevity. Furthermore, it offers diagnostic feedback via a status output pin, enabling real-time monitoring of fault conditions such as open-load, overtemperature, or overcurrent scenarios. This diagnostic capability is essential for designing state-of-the-art predictive maintenance systems and improving functional safety.

The BTS442E2 also features reverse battery protection and is qualified according to AEC-Q100, the key standard for automotive-grade electronic components. Its ability to withstand high inrush currents and inductive load dump pulses makes it particularly suited for demanding applications such as steering systems, motor controls, solenoid actuation, and heating elements.

Housed in a compact, surface-mountable TO-263-7 package, the device offers both high power density and efficient thermal performance. Its embedded control logic allows direct interfacing with microcontrollers, simplifying driver circuit design and reducing external component count.

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ICGOODFIND: The Infineon BTS442E2 PROFET™ is a high-performance smart switch that delivers high current capability, advanced diagnostic features, and robust protection in a single package. It stands out as an optimal solution for designers seeking reliability and integration in automotive body electronics, powertrain systems, and industrial automation.

Keywords:

High-Current Switch, PROFET™, Automotive Grade, Diagnostic Protection, AEC-Q100