Thermal infrared emitter in standard 3x3 mm² SMD, gold plated


PackageSMD (3x3 mm²)
Radiating element area0.32 mm²
Radiating element emissivity> 0.9
Radiating element temperature700 °C at 175 mW
Optical output powerup to 11 mW
Max. electrical power (DC)175 mW
Max. electrical voltage1.25 V
Max. electrical current140 mA
Electrical cold resistance8.5 +/- 1 Ω
Electrical hot resistance8.5 +/- 1 Ω
Modulation frequency14 Hz*
Filter/WindowSapphire (glued)
Wavelength range2 to 6 µm
Filling gasNone
* 50 % modulation depth, square wave signal, 50 % duty cycle


Driver Circuit Board DCB.S3.175

LDO regulatorLT3065
Input voltage (V_in)(1.6 … 13) V
Pulse signal voltage Low/OFF(0 … 1) V
Pulse signal voltage High/ON1.5 V … V_in
Drive power175 mW

The Driver Circuit Board supports a quick evaluation of our IR emitters and can be ordered as single component (without IR emitter) or assembled with an IR emitter of the HISsmd series. Only a supply voltage and a pulse signal have to be applied to the 3-pin Molex PicoBlade 1.25 mm connector. For more information about its function, see our technical note.

Breakout Board BOB 0.4


The Breakout Board transfers the SMD footprint to 2.54 mm headers and can be ordered as single component (without IR emitter) or assembled with an IR emitter of the HISsmd series.

Document downloads

HIS20smd-A data sheet (PDF)

HIS20smd-A ZEMAX data (ZAR)

Technical note for Driving Circuit Board for HISsmd - emitters (PDF)

HISsmd series handling instructions (PDF)

HISsmd series product overview (PDF)

Comparison of HISsmd emitters (PDF)

HISsmd 系列光源竞品对比 (PDF)

ISO9001 certificate (PDF)

Quality policy of Infrasolid (PDF)

Main features

  • Package: SMD (3x3 mm²) with sapphire window 2-6 µm
  • Radiating element: (0.4 x 0.8) mm²

JEDEC compliance

All our emitters comply with the following JEDEC-standards:


(temperature cycling and shock test: -45 °C / + 90 °C, 100 cycles)


(vibration test: log. sweep 20 Hz…2000 Hz, peak 20 g, X/Y/Z direction)


(drop test: 5000 m/s², 6 directions)

Sample request

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HISsmd series

Miniaturized infrared sources in SMD housing

HISsmd series emitters are small, powerful infrared radiation sources that meet the demands for reliable miniaturized gas sensors and offer a wide range of new application scenarios. The low energy consumption, the high efficiency and the small size allow the use in portable, battery-powered, and mobile applications. These innovative infrared light sources are used, for instance, in respiratory gas analysis, e.g. for the detection of CO₂ and breath alcohol, and in Smart Home and Smartphone applications. The pioneering SMD package enables a fully automated production in high-volume markets.

Infrasolid’s infrared radiation sources are pulsable thermal emitters with a near black-body emittance. Based on a patented nanotechnology and a patented emitter set-up made of a high-melting metal, the free-standing monolithic radiating element and the nanostructured emitter surface offer numerous advantages in many applications.

Are you looking for other technical specifications or would you like a customized solution? Feel free to contact us!

HISsmd series overview

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