Extending its B82453C A series of 3D transponder coils, TDK has added a new type that features an operating frequency of 22kHz. The B82453C0335A022 complements the existing spectrum designed for a frequency of 125kHz and is suitable for automotive passive entry passive start (PEPS) and other access systems based on the lower frequency, says the company.

The 3D transponder coil also offers high inductance values of 30, 33 and 55mH, respectively, for the x-, y- and z-axes. This results in extremely high sensitivity values of 25.5mV/-microT for the x- and y-axes, and 23.3mV/microT for the z-axis, claims TDK, which describes them as the world’s highest sensitivity values for 3D transponder coils. They are claimed to be approximately 20 per cent higher than those of existing products with comparable dimensions and inductance values.

Like the existing types for 125kHz, the 22kHz coil is RoHS-compatible and is compact, with dimensions of just 11.5 x 12.5 x 3.6mm. Its plastic over-moulding and laser-welded connections ensure that the component is mechanically very stable, says the company, quoting the severe drop tests prescribed for PEPS components. The transponder coils are qualified to AEC-Q200.

TDK is an electronics company based in Tokyo, Japan. It was established in 1935 to commercialise ferrite, a key material in electronic and magnetic products. TDK’s portfolio includes passive components, such as ceramic, aluminum electrolytic and film capacitors, ferrites and inductors, high-frequency products, and piezo and protection components, as well as sensors and sensor systems and power supplies. These products are marketed under the product brands TDK, EPCOS, InvenSense, Micronas, Tronics and TDK-Lambda. TDK’s further main product groups include magnetic application products, energy devices, and flash memory application devices. TDK focuses on demanding markets in the areas of information and communication technology and automotive, industrial and consumer electronics.

The company has a network of design and manufacturing locations and sales offices in Asia, Europe, and in North and South America.