The Renesas Electronic's single-channel silicon-based thermopile detector is in TO-5 package. The device offers a low-cost solution, with a small active area and fast response, with a time constant of 18ms with nitrogen encapsulation gas.

Active area size is 0.61 x 0.61 mm
Delivers a time constant of 18 ms with nitrogen encapsulation gas
Very low temperature coefficient of responsivity of -0.04%/°C
Very short thermal shock response to ambient temperature change