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BackVAC, 125 VDC (https://us.schurter.com/bundles/snceschurter/epim/_ProdPool_/newDS/en/typ_UMT_250.pdf Surface Mount Tactile Switch with LCD screen E3 SAxxxx switch normally-open pushbutton push-button LED D MEC 5E single pole double throw, separate symbols Quad Low-Noise JFET-Input Operational Amplifiers, DIP-14/SOIC-14 | | | | | | J2 | 1 nF | Unpolarized capacitor | | | | | | J7 | 1 | SW_3PDT_x3 | Switch, triple pole double throw | | | | C9 | 4 .../PCB/precadsr_Gerbers/precadsr-F_SilkS.gbr | 1166 .../PCB/precadsr_Gerbers/precadsr-NPTH.drl | 4 | 100 nF | Unpolarized capacitor | | J3 | 1 | SW_3PDT_x3 | 3PDT miniature toggle switch | | | | | | | | | J2 | 1 | Conn_01x04 | Pin header 2.54 mm spacing"/>