NTC thermistor withstands temperatures up to 185°C

Vishay Intertechnology, Inc. has released a new AEC-Q200 qualified NTC thermistor with polyetheretherketone- (PEEK) insulated, nickel-iron (NiFe) leads with a low thermal gradient and fast response time. Designed to withstand high temperatures up to 185°C, the Vishay BCcomponents NTCLE350E4 delivers high-accuracy temperature measurement and sensing in a wide range of automotive applications.

The NiFe alloy used in the conductor wire features the lowest thermal conductivity available on the market, according to Vishay, offering a thermal gradient of less than 0.01 K/K (or 1 %) and dissipating almost no heat to the surrounding environment, which enables high accuracy temperature measurement. To improve reliability in high humidity conditions, the sensor features high adhesive strength between its PEEK-insulated lead wires and encapsulating epoxy lacquer. In addition, a small maximum bead size diameter of 2.4 mm results in a fast response time of 6 seconds (s) in air.

These features make the NTCLE350E4 suited for engine coolant, fuel, and manifold air pressure (MAP/TMAP) sensors in combustion engines, in addition to HVAC applications. In electric traction motors, the device can be processed by potting or molding into sensors for the protection of high-current connectors. It also can be used in oil temperature sensors (OTS) in transmission systems and liquid-cool starter generator systems, in addition to exhaust gas recirculation (EGR) applications.

The sensor offers resistance at 2 °C (R₂₅) from 2.1 kΩ to 30 kΩ, with tolerance down to 1%, and beta (B_25/85) from 3435 K to 3984 K, with tolerance down to ± 0.5 %. The device features maximum power dissipation of 100 mW and improved resistance to noxious gases and acid. The operating temperature range is -55°C to 185°C.

Samples and production quantities of the RoHS-compliant NTCLE350E4 are available now, with lead times of 12 weeks. Pricing for U.S. delivery is $0.30 per piece in a minimum order quantity of 1,000.

Vishay also recently introduced AEC-Q200 qualified thin-film chip resistors for automotive applications. The NCW AT family offer high temperature operation, higher dissipation to 1 W, and lower resistance values down to 0.10 Ω.