Thermocouple Isolator

Thermocouples are often used to sense temperatures of electronic devices such as LEDs. Uninsulated thermocouples provide the best performance, however they cannot be used when the measurement point is at an electric potential higher than the common mode limit of the thermal measuring equipment – often just a few volts. The thermocouple isolator provides a way to attach a bare, uninsulated thermocouple to an electrically active point, such as an LED lead. The isolator provides electrical isolation while maintaining thermal conductivity.

Thermocouple attached to isolator (representation)

Thermocouple Isolator Pods provide many benefits:

  • Passive Design – No Circuitry
  • 500V Electrical Isolation
  • Attach With Solder or Epoxy
  • Excellent Thermal Conductivity
  • LED-Safe Materials
  • Improves Measurement Accuracy

Easy Attachment

The thermocouple isolator pod solders to the device lead. The thermocouple solders to the isolator. The isolator may be soldered using standard SMT or hand soldering techniques. Gold plating on the top and bottom surfaces facilitate easy solder and removal. Isolators may also be installed using thermal epoxy.

Accurate In Challenging Environments

High intensity light such as that from a high power COB array can introduce errors of several degrees C in traditional stainless-sheathed thermocouples. Thermocouple isolators allow small gauge, unshielded thermocouples to be used for measurements. Often these are the best choice in LED measurement applications because their thin lead wires can be routed away from optical emissions that influence measurements.

Size2mm x 3mm x 1mm
Voltage Rating500V
Working Temperature-55C to 140C
Exterior PlatingGold
Thermal Conductivity2 W/m-K
Electrical Isolation500V