TDK launches automotive power-over-coax inductors

Japanese manufacturer TDK Electronics has expanded its ADL3225VF series of wire-wound inductors for automotive power-over-coax (PoC).

The company started mass production of the new components in March 2025.

In standard configurations, advanced driver-assistance systems (ADAS) cameras require two separate lines for power and signal transmission—a power line connected to the vehicle’s battery and a signal line connected to the electronic control unit (ECU). PoC technology enables a single coaxial cable to simultaneously carry power and data, simplifying and reducing cabling. This can reduce the vehicle’s weight, in turn improving fuel efficiency.

The ADL3225VF series measures 3.2 mm x 2.5 mm x 2.3 mm and implements a rated current of 1.6 A, which is equivalent to that of the ADL4532VK series, while reducing the mounting area of approximately 45%.

The PoC system requires a filter incorporating multiple inductors to separate power from the data signal before processing effectively. In comparison with TDK’s conventional ADL3225VM-2R2M product, the ADL3225VF series increases the rated current by approximately 20%. At the same time, it delivers high impedance across a wide frequency range. This reduces the number of inductors used, saving space. Additionally, the inductor ensures high reliability within a wide operational range of -55° C to +155° C.

“Looking ahead, TDK is committed to developing inductors for automotive PoC applications by pursuing optimized design by refining multilayer, wire-winding, and thin-film technologies to address market needs. TDK will expand its lineup of products to improve the quality of PoC transmission signals,” the company stated.

Source: TDK