The 4021.0512 is a double-pole, double-throw (DT) switch from the Marquardt 4021 series, designed for voltage selection and power control. It has an electrical rating of 2 (0.5) A at 250 V~ and is also rated for currentless switching up to 10 A at 125 V~. This switch features a mechanical life endurance of 10,000 cycles (1E4), a contact gap greater than 3 mm, and utilizes 2.8 mm quick-connect terminals for installation. With reinforced insulation, a PTI 250 tracking resistance, and suitability for Class II appliances, this switch is ideal for various electronic devices requiring reliable voltage selection.