Infineon BTS3405GXUMA1 Low Side 2, Smart Low Side Power Switch IC 8-Pin, SOIC

This power switch IC is a smart low-side MOSFET device designed for automotive control tasks, providing multiple switched outputs for vehicle systems. It is intended for use in environments requiring vehicle-grade operation and integrates control logic with power switching to manage low-side loads from a single package. The component is supplied in a compact eight-pin SOIC surface-mount package suitable for board-level integration in automotive electronic modules.

• Five independent outputs offering multi-load control and simplified harnessing
• 350mA operating current supporting small actuator and lamp loads
• 1.9Ω Rds(on) minimising conduction losses during switching
• 10V maximum supply voltage enabling compatibility with common vehicle domains
• Operates from -40°C to 150°C allowing wide thermal margin for engine bays

• Suitable for controlling exterior lighting circuits on vehicles
• Ideal for driving small motors in seat or mirror adjustment systems
• Used for switching heater or blower auxiliary loads in cabins
• Can be used for managing diagnostic or accessory circuits in modules
• Used with multi-channel control units requiring compact power switching

It is supplied in an eight-pin SOIC package and is intended for surface-mount assembly processes.

The device provides two inputs to interface with vehicle control logic or microcontroller outputs.

The device is specified to operate up to 150°C maximum, enabling use in high-temperature automotive compartments.

The part implements a low-side switching topology, making it appropriate for switching loads to earth in typical vehicle architectures.