Infineon Technologies has introduced LinearFET, a new MOSFET1. metal-oxide semiconductor field effect transistorVoltage-controlled field-effect transistor with an insulated gate, widely used in integrated circuits.2. metal-oxide-semiconductor field-effect transistorA common transistor type used here as the layout and technology reference. technology for automotive power distribution applications. The company says the approach is designed to simplify next-generation solid-state power distribution systems in electric and software-defined vehicles by moving several functions directly into the power device.
The core technical challenge addressed by LinearFET is the combination of current sharing, inrush current control, and short-circuit robustness. In conventional designs, these functions often require additional circuitry, more complex control strategies, or oversized components. Infineon positions LinearFET as a way to remove those barriers at the device level instead of compensating for them at the system level.
For designers of high-current automotive power paths, the technology is intended to enable predictable paralleling of MOSFET1. metal-oxide semiconductor field effect transistorVoltage-controlled field-effect transistor with an insulated gate, widely used in integrated circuits.2. metal-oxide-semiconductor field-effect transistorA common transistor type used here as the layout and technology reference.s, making scalable current capability easier to implement. It also supports controlled charging of large capacitive loads without external current limiters, which is relevant for switch-on events in power distribution networks.
Another stated benefit is improved robustness under short-circuit conditions. Infineon links this to demanding automotive safety requirements, where solid-state architectures must remain reliable while replacing or complementing traditional fuse-box concepts.
The technology is targeted at power distribution units, battery disconnect switches, solid-state fuse systems, and zonal power architectures. In these applications, LinearFET is meant to reduce implementation complexity while also supporting more compact and cost-efficient system designs.
Availability has been announced and products are available. Infineon will also present the technology at electronica 2026 in Munich as part of its broader showcase of semiconductor and system solutions for electric vehicles, edge devices, robotics, and AIartificial intelligence-related power and connectivity applications.