NTC immersion thermistor delivers fast response time for liquid-cooled automotive systems

Vishay Intertechnology, Inc. has introduced a new AEC-Q200 qualified NTC immersion thermistor. Featuring a miniature design with a compact sensor tip and thin insulated wire, the Vishay BCcomponents NTCAIMM66H is ideal for the small spaces of liquid-cooled automotive systems, where it delivers a fast 1.5-second response time to temperature changes.

The rugged device comprises a miniature NTC thermistor mounted in a stainless steel 316L housing with lead (Pb)-free brass, and 0.35mm² AWG#22 insulated lead wires with a FLR2X construction that allows a traction force higher than 30N. These wires enable direct crimping with automotive connectors, eliminating the need for costly wire-to-wire connectors. The stainless-steel housing allows permanent contact with water or other liquids.

The device will be used for temperature measurement, sensing, and control in liquid-cooled automotive systems, such as HEV/EV OBCs and charging plugs and sockets, as well as in solar heating systems, energy storage systems, industrial drives and tools, and servers. The device can be customised with different cable and stripping lengths, gauges, and conductor plating to meet the requirements of specific applications, enabling the company's customers to integrate the thermistor into their complete sensor solutions for HEV/EV thermal management systems (TMS).

The immersion sensor offers resistance at +25C (R25) of 10kΩ, with tolerance of ±2%, and beta (B25/85) of 3984K, with tolerance of ±0.5%. The device features maximum power dissipation of 100mW and an operating temperature range of -40C to +125C.

Samples and production quantities of the NTCAIMM66H are available now.