NFC stands for Near Field Communication, a type of short-range wireless communication.
Devices equipped with NFC can perform data transmission and authentication simply by being brought close to each other. This feature is rapidly being integrated into smartphones in recent times.
Additionally, its implementation is expanding to peripheral devices like wearable devices such as smartwatches.
NFC is widely used in cashless payment transactions and for connecting and authenticating peripheral devices. It holds the potential for diverse applications in realizing a touchless society.
This article introduces the main components used in NFC circuits, including NFC antennas, magnetic sheets, inductors for LC filters, and baluns for single-ended circuits.

TDK offers a lineup of multilayer chip varistors to protect equipment from failing due to surge voltages. In the TDK Product Center, you can find individual product data sheets and product catalogs describing various electrical characteristics. However, (1) it does not show how to read or use the data sheet. (2) It is difficult to narrow down the parts that are optimal for countermeasures against surge voltage. Therefore, the problems are to spend time on component selection ~ evaluation.
In order to solve these problems, we will introduce a simulation tool for multilayer chip varistors that can select the optimal components for countermeasures against surge voltage.

Global warming is currently an issue of worldwide concern. CO₂ (carbon dioxide) not only contributes to this problem but also has a significant impact on our health. In the pursuit of improving air quality in various environments, such as homes, offices, and hospitals, there is an escalating demand for sensors capable of detecting CO₂ and various other gases. TDK is developing a CO₂ gas sensor that is significantly smaller in size than previous sensors and consumes less power.

We will explain the characteristics of the TDK pattern coil and introduce an example of its use when installed in a wireless charger.

TDK Corporation (TSE:6762) has developed the J404, the world's first* surface-mountable inrush current limiter (ICL) based on PTC (positive temperature coefficient) technology. Designed for DC voltages of up to 500 V and AC voltages of up to 350 V, the device (order number B59404J0170A062) automatically and intrinsically limits excessive currents in applications such as DC links and charging devices in electromobility.

TDK's NTCRP series (NTC thermistors) are used in a wide range of applications, including drive motors and batteries for electric vehicles and temperature sensing for industrial equipment. These products are designed to meet stringent reliability requirements.
Insulation resistance and dielectric withstand voltage are particularly crucial parameters for ensuring both safety and reliability during end-user operation.
This article aims to explain the test methods for evaluating the insulation resistance and dielectric withstand voltage of the NTCRP series.

TDK Corporation (TSE:6762) has expanded its family of flat wire inductors with the high-performance EPCOS ERUC23 coupled inductor series (B82559S*). In such components, two windings share a single magnetic core. The new series comprises six types covering a coupled inductance range from 1.4 µH to 4.1 µH and saturation currents from 50 A to 97 A. The AEC-Q200-qualified and RoHS-compliant components, which can be picked and placed automatically, have dimensions of just 26.8 x 13.8 mm2, with heights varying between 13.7 mm and 14.0 mm depending on the type. They are specified for a wide temperature range from -40 °C to +150°C, and depending on the type, the DC resistance of a single winding is 0.82 mΩ to 1.85 mΩ.

In today's data-driven world, enterprises across various industries recognize the immense potential of machine learning (ML) and artificial intelligence (AI) to drive innovation, gain competitive advantage, and deliver better business outcomes. However, developing and deploying ML models can be complex, time-consuming, resource-intensive, and often require specialized expertise.  
 
Qeexo's Auto Machine Learning (AutoML) platform offers a comprehensive solution that automates and simplifies the process of building and scaling ML models without the need for expensive experts.
Further, the solution can build and deploy ML models on edge devices with ease to add an additional layer of security, efficiency, and real-time decision making.

TDK Corporation (TSE:6762) introduces a sample kit (B74999T9999M099) consisting of ten different types of ultra-compact TVS diodes. Five of them belong to the general-purpose GP series, which protects against overvoltage on applications such as smartphones, tablets, notebooks, wearables, and network components; five others belong to the high-speed ULC series, which are tuned for particularly sensitive high-speed interfaces (e.g., USB-C, Thunderbolt, HDMI, Display Port, MIPI, FireWire, DVI, S-ATA, or SWP/NFC). These protection diodes are available in the ultra-compact packages WL-CSP01005 (400 x 200 μm) and WL-CSP0201 (600 x 300 μm).

TDK Corporation (TSE:6762) presents the new T850 SMT NTC sensor (B57850T0103*) for measuring surface temperatures. It combines high humidity resistance with fast response time due to excellent thermal coupling to the target. The sensor is suitable for harsh environments with temperatures from -40 °C to +150 °C and is waterproof for up to 500 hours. In addition, the sensor, with its aluminum oxide ceramic surface, offers a high dielectric strength of 2500 V AC for 60 s.