The SZL9-20/D1050.4 is a four-section, three-position changeover switch with a rated current of 20A. It features one power input divided into two power outputs, allowing for switching between two devices. When the handle is rotated to position 1, the first set of ABCN contacts is connected; when rotated to position 2, the second set of ABCN contacts is connected; and in the middle position O, all contacts are disconnected. It is suitable for AC 50Hz~60Hz electrical circuits with a rated operating voltage of ≤440V and a rated insulation voltage of 690V. It features flame-retardant and high-temperature resistant materials, good insulation, safety and durability, silver alloy contacts, thickened copper components for stable conductivity and long service life, flexible installation methods, a compact structure, clear operating feel, and customizable panel text. It can be customized to provide unified switching control for four circuits, or through different position combinations, to achieve various operating states, meeting the conventional requirements of multi-circuit control.
It is widely used in rail transit, construction machinery, automotive parts, machine tools, port and shipping, new energy, power and automation, and other fields.
Mechanical life: 0.3 x 10⁶ cycles, operating frequency 120 times/hour.
Electrical life: 0.6 x 10⁶ cycles, operating frequency 120 times/hour.
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