SZW26-20/B404.4 Three-Position Four-Section Automatic Reset Changeover Switch This product is a three-position, four-section automatic reset changeover switch with an operating mode of "-ON – OFF – +ON". It has a rated current of 20A and is suitable for circuits with AC 50/60Hz, rated operating voltage ≤440V, and insulation voltage of 690V.
Features:
Instantaneous Control and Automatic Reset: When the handle is rotated to the "-ON" position, four sets of circuits (1-2, 5-6, 9-10, 13-14) are simultaneously connected; when rotated to the "+ON" position, another four sets of circuits (3-4, 7-8, 11-12, 15-16) are simultaneously connected. After releasing the handle, the switch automatically resets to the middle "OFF" position, and all circuits are disconnected.
Structural Design: Features a flame-retardant casing, silver alloy contacts, and thickened copper conductors for reliable insulation and stable conductivity.
Service Life: Mechanical life ≥ 10⁵ cycles, electrical life ≥ 3×10⁴ cycles (operating frequency 120 times/hour).
Operating Conditions: Ambient temperature -25℃ ~ +40℃, altitude ≤ 2000m.
Application Scenarios:
Suitable for applications requiring multi-point instantaneous switching and safe reset control, such as multi-motor jogging control, equipment debugging and testing, and safety interlock control on industrial control panels. Especially suitable for safety circuits or temporary function switching requiring automatic reset after operation.
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