The TA-3521-A3 with Toggle Switches Through Hole,9.0x3.5x4.0mm RoHS manufactured by Yuandi is a common type of switch that’s used to control a variety of electronics. It features a toggle switch that requires physical engagement to activate. The switch itself is housed in a plastic body and has a contact rating of 10A/125VAC, 5A/250VAC. It is also RoHS compliant and measures 9.0 x 3.5 x 4.0mm, allowing it to fit into tight spaces. The TA-3521-A3 is ideal for many applications, including controlling power, alarms, and lighting systems.