As data centers and communications networks evolve to support faster speeds and greater bandwidth, the demand for high-performance optical transceivers is surging. With the shift toward higher output and compact, high-density designs, thermal management has become a critical factor in maintaining system reliability and performance. This article introduces TDK’s bondable NTC thermistors—engineered to meet the thermal challenges of next-generation optical transceivers. It outlines key features, product options, and the practical advantages these components offer to design engineers focused on innovation and operational stability.

TDK Corporation (TSE:6762) launches B58101A0851A000, the first in a new line of immersion temperature sensors (ITS), designed specifically for EV powertrain cooling applications. This highly responsive, fully sealed NTC thermistor is engineered to provide fast and precise temperature control, e.g., for oil-cooled systems. Oil cooling is anticipated to become the dominant temperature management method in the electric drivetrain of EVs. Leveraging TDK's expertise in developing tailored temperature sensor solutions, the ITS offers a flexible, customizable design adaptable to various installation positions, cooling fluids, and mounting configurations.

TDK Corporation (TSE:6762) announces the L862 (B57862L) NTC thermistors with bendable wires and the L871 (B57871L) lead spacing NTC thermistors that can be used in a wide range of automotive and industrial applications. Both series are Pb-free and can measure temperatures between -40 °C and +155 °C with a tolerance of ±1% and ±3% respectively. At room temperature, their maximum power dissipation is 60 mW. Both series are available with different rated resistances between 1 kΩ and 100 kΩ and different R/T characteristics (see tables below and on the next page). After 10,000 h at +70 °C, the deviation of the resistance at room temperature R25 is less than 3%.

The sensor element of the L862 that is encapsulated with a black epoxy coating is just 2.6 x 6.5 mm (D x H) in size and has insulated leads of silver-plated nickel wire (AWG 30, Ø 0.25 mm). The total length of the sensor including the wires is 50 mm, with 6 mm stripped. While the dissipation factor δth of the sensor is 1.4 mW/K, its thermal cooling time constant τc is 14 s.

Also, the sensor element of the L871 is encapsulated with a black epoxy coating. It is just 2.8 x 6.0 mm (D x H) in size and has Cu-clad steel wires (Ø 0.4 mm) with a spacing of 2.5 mm. While the dissipation factor δth of the sensor is 3 mW/K, its thermal cooling time constant τc is 9 s.

TDK's NTCRP series (NTC thermistors) are used in a wide range of applications, including electric vehicle drive motors, batteries, and industrial equipment temperature detection, which require high reliability. This article explains thermal response, a very important characteristic of NTC thermistors, and introduces the method of measuring the response of the NTCRP series.

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) 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.

The technology that delivers the metaverse will build on the technology for virtual reality, using more sensors, and more different kinds of sensors. TDK has one of the richest sensor portfolios in the industry, extensive software expertise, and excels at sensor fusion.

The NTC thermistor is a thermally sensitive resistor whose resistance decreases rapidly as the temperature rises. This property can be utilized in various applications such as temperature sensors and thermal protection devices to protect circuits from overheating.
By mounting the NTC thermistor in close proximity to the heat source, it can accurately sense the temperature of the heat source. However, in some cases, such as when there are constraints on the size of the board or the pattern layout, it may need to be mounted in a location away from the heat source.
In this article, considering such conditions, we used the LEDs on the LED flash circuit board as the heat source and simulated heat generation to check the temperature difference between the LEDs and the NTC thermistors caused by the different mounting positions. We also checked the effect of circuit board thickness.

Service robots are widely used in various situations such as logistics / transport, security, cleaning, housework, hobbies / entertainment and care / assistance. Since service robots are used in a wide variety of situations, it is necessary to fulfil many requirements such as smooth communication with humans (HMI), ensuring safety and responding to changes in the real time. In service robots, the role of a sensor is very important. In this article, we will take a vacuum cleaner robots as an example.