Honeywell 3455RM-92990954

Thermistors change resistance with temperature; they do not amplify, rectify, polarize, or generate signals. A thermistor's temperature can be altered by the surrounding environment or by self-heating through applied current. Most applications — such as temperature measurement and control or copper coil compensation — require minimizing thermistor power dissipation to prevent significant self-heating. Other applications, however, rely entirely on the self-heating effect. When the ambient temperature is fixed, a thermistor's resistance depends largely on its internal power dissipation, which raises its temperature above the ambient level. Under these operating conditions, the temperature may rise 100°C to 200°C (121°F to 392°F), and at low current, resistance may drop to as low as 1/1000 of its original value. Glass Encapsulated Chip (GEC) thermistors are high-quality, hermetically sealed glass encapsulated chip thermistors in axial lead packages, rated for -60°C to 300°C (-76°F to 572°F), suitable for many reliability-critical, cost-effective applications. Epoxy-coated or uncoated chip thermistors are available in a wide range of custom resistance values and R/T curves, with both uninsulated and insulated lead options. UNI-CURVE interchangeable thermistor temperature matching reduces costs, eliminates individual resistance-temperature calibration, enables standardization of circuit components, and simplifies design and replacement. Disc thermistors are available uncoated or epoxy-coated, in a wide range of custom resistance values and R/T curves, with uninsulated leads only, suitable for low-cost applications up to 150°C (302°F), PC board mounting, and tape-and-reel packaging.

• Glass Encapsulated Chip (GEC) Thermistors: Full temperature range coverage from -60℃ to 300℃; rugged construction; uniform dimensions; suitable for automated assembly.
• Epoxy Coated or Bare Chip Thermistors: Multiple custom resistance values and R/T curves; non-insulated and insulated lead options; operating temperature range -40℃ to 125℃; dissipation constant minimum 0.75mW/℃ in still air; time constant maximum 15s in still air; resistance range 100Ω to 100kΩ at 25℃.
• UNI-CURVE Interchangeable Thermistors: Temperature matched; operating temperature range -40℃ to 150℃; dissipation constant minimum 0.75mW/℃ in still air; time constant maximum 15s in still air; resistance range 1kΩ to 100kΩ at 25℃.
• Disc Thermistors: Multiple custom resistance values and R/T curves; non-insulated leads only; diameter range 2.54mm to 10.16mm; operating temperature range -60℃ to 150℃; dissipation constant 3mW/℃ to 8mW/℃ (size dependent); time constant 10s to 32s (size dependent); resistance range 100Ω to 100kΩ at 25℃.

• Temperature measurement
• Temperature control
• Copper coil compensation
• Voltage control
• Power level control