IR-3X series infrared sources

These infrared sources are 4.2 W wire wound IR source mounted on a TO-5 header, suitable for use in laboratory or field instrumentation – with and without parabolic reflector

Please contact us for further information on this product.



  • Rugged and Reliable
  • Long Life, Stable Properties
  • Supported, Coil Wound
  • Does not require operation in a sealed atmosphere
  • Can be mounted on a circuit board, alternative mounting available

The IR-3X series is a coil-wound, supported IR Source, mounted on a TO-5 header. It is appropriate for use in laboratory or field instrumentation due to its long life and stable properties.

At steady state, the coiled filament operates at ~925°C when powered with 4.2 watts for the standard IR-30 and at ~950°C when powered with 4.2 watts for the IR-30K. The IR-30 uses a high stability wire whereas the IR-30K uses Kanthal resistance wire for operation at higher temperature. Apart from the wire used, the IR-30 and IR-30K are identical.

It can be pulsed up to 1 Hz with a larger power input. When operated at 1 hertz, 50% duty cycle with 3.5 volts, 7.1 watts, the output is a well-defined saw tooth with approximately 32% modulation depth. For higher modulation speeds, the pulsable sources should be considered.

Operation in a controlled or sealed atmosphere is not required.

Operating Specifications IR-30 Series

  • Active area: 1.8 mm x 1.8 mm
  • Emissivity: ~0.75
  • Temperature: 950°C
  • Voltage: 2.5 Volts (AC or DC)
  • Current: 1.7 Amps
  • Lifetime: ~25,000 hours
  • IR-35 Normalized On-Axis Output:11x the output of the IR-30


An interactive pdf data sheet is available for all Hawkeye IR sources ( 8 MB ):

IR source data sheet