Temperature Sensors (NTC)
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TDK offers rugged SMT NTC sensor for surface temperatures
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.
TDK launches new Au wire bond-optional NTC thermistors for laser diode temperature measurement
TDK Corporation (TSE:6762) has announced the introduction of its new NTCWS series of NTC thermistors, available with Au wire bonding. These bondable NTC thermistors can be mounted with Au wire bonding inside the package for highly accurate temperature detection of laser diodes (LDs) used for optical communication. Mass production of the product series began in September 2023.

The use of LD devices in optical communication transceivers is increasing, as typified by 5G and LiDAR used for inter-vehicle distance measurement. Since the wavelength of LDs changes with temperature, controlling the temperature of LDs is the key to improving their performance.
Product Overview
NTCRP Series Glass-encapsulated Radial Lead
The NTCRP series is a small and highly precise temperature sensor with a high degree of versatility, capable of withstanding temperatures up to 200℃, and housed in a PPS resin case. While thermocouples are sometimes used as the temperature sensor, the NTCRP series, which utilizes small and inexpensive NTC thermistors, is ideal for temperature control in applications such as automotive drive motors and industrial servo motors. The robust PPS case is a highly reliable product that can be used without issue even in high-temperature oil and vibration-heavy environments.
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Applications & Cases
Application Note
The Metaverse Will Engage All Five Senses
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.
Application Note
Temperature sensing of LED Flash with NTC thermistor
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.
Application Note
Failure Modes and Countermeasures in Actual Use of NTC Thermistors
NTC (Negative Temperature Coefficient) thermistors are thermally sensitive semiconductor resistors which show a decrease in resistance as temperature increases, and its rate of change is extremely large.

Its main applications include temperature sensing in electronic equipment and temperature compensation for module products.

However, if the user misuses the product, it may not function properly and, in the worst case, this may cause malfunctions.

This page introduces the causes and countermeasures for ”cracks” and ”melting of ceramics” as failure modes caused by improper use of NTC thermistors.
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Solution Guides
Solution Guide
NTCRP Series Thermal Time Constant (Thermal Response)
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.
Solution Guide
TDK NTCRP Series Insulation Resistance and Dielectric Withstand Voltage Test Methods
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.
Solution Guide
Sensors solutions that enable advanced control of service robots
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.
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    • TDK Product Features
    TDK's NTC thermistor elements and sensor systems are thermally sensitive semiconductive resistors with negative temperature coefficient that are designed for temperature measurement and compensation. The portfolio covers NTC thermistor elements and systems with excellent long-term stability and short response time in high-temperature applications, e.g. for automotive, home and industrial applications. Tight tolerances of resistance and B value allow highly accurate temperature sensing capabilities.
    News
  • May. 22, 2024 Solution Guide "NTCRP Series Thermal Time Constant (Thermal Response)" [New]
  • Oct. 17, 2023 Solution Guide "TDK NTCRP Series Insulation Resistance and Dielectric Withstand Voltage Test Methods" has been released.
  • Sep. 7, 2023 Temperature sensors: TDK launches new Au wire bond-optional NTC thermistors for laser diode temperature measurement
  • Aug. 25, 2023 Application Guide for Gaming & Peripherals has been released.
  • Aug. 10, 2023 Application Guides for Power for Infrastructure have been updated.
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