B3F-3102 (Omron) is a side-operated through-hole tactile switch of the B3F series, with ground terminal.

• Side-operated · 3.15 mm flat plunger, yellow
• 1.47 N (150 gf) operating force
• Silver-plated contacts · rated 1 to 50 mA at 3–24 VDC (resistive load)
• 100 mΩ maximum contact resistance · ambient temperature −25 °C to 70 °C

Data per Omron B3F datasheet.