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version 1.0 – December 2021

18/22

5 Mechanical Specifications

of 0.8 mm. The sensor opening with a typical diameter of 0.8 mm is offset to the bottom right corner on the top side of the

package. The sensor chip is assembled on a Ni/Pd/Au plated copper lead frame. Sensor chip and lead frame are over-molded

by a black, epoxy-based mold compound. Please note that the side walls of the package are diced and therefore the lead frame

sidewall surfaces are not plated.

5.1 Traceability

All SGP41 sensors are laser marked for easy identification and traceability (Figure 16). The marking on the sensor top side

consists of a pin-1 indicator and three lines of text. The top line consists of the pin-1 indicator which is located in the top left

corner and the product name. The two lines at the bottom consist of 2 alphanumeric digits each. That code can be decoded by

Sensirion only and allows for tracking on batch level through production, calibration, and testing – and will be provided upon

justified request.

If viewed from below pin 1 is indicated by triangular shaped cut in the otherwise rectangular die pad. The dimensions of the

triangular cut are shown in Figure 17, right. The sensor opening on the top side is not recommended for optical alignment.

Figure 16 Top view of the SGP41

illustrating the laser marking.

5.2 Package Outline

Figure 17 Package outline drawing of the SGP41. Dimensions are given in millimeters.