NTCLE317 NTC Thermistor Vishay / BC Components NTCLE317 NTC Thermistor with Very Low Thermal Gradient is a fast-reaction sensor suited for applications where a small bead size with tight temperature accuracy is required, down to ±0.5°C, around the actual hotspot temperature (temperature gradient lower than 10mK/K). The PEEK-insulated NiFe alloy conductor wires of NTCLE317 have the lowest thermal conductivity available. When the component measures a hot spot inside a temperature probe, essentially, no heat is dissipated to the surrounding environment through the wires.