Product Specifications

NTC Thermistor Probes

The ASN and TO-92 NTC Thermistor Probes offer economical, reliable and accurate solutions to applications requiring more extensive sensing than the one or two temperature points typically offered by a bimetallic thermostat. The ASN and TO-92 NTC thermistors provide a change in resistance with temperature that when combined with an electronic circuit provides a means of continously measuring temperature over a very wide range.

Applications (ASN)

• Heat Sink Monitoring
• Surface Temperature Monitoring for Power Supplies, Power Amplifiers, and Motor Controllers

Applications (TO-92)

• Radical NTC disc replacement
• Probe Designs
• PCB temperature monitoring
• Power supply fan control

Features & Benefits

• Standardized Component
• High Volume Production
• Popular Resistance Values

Operating Principle of NTC Thermistors

NTC thermistors are semiconductor ceramics made with various metal oxides. Their electrical resistance decreases with increasing temperature. This resistance is processed by an electronic circuit to provide temperature measurement. While a bimetallic thermostat provides both temperature sensing and electrical circuit control, the thermistor itself does not provide any control over heating elements, relays, etc. The thermistor is strictly a sensor and any electrical control would need to be implemented by the circuit utilzing the thermistor.