SZW26-20/B303.3 Three-Position, Three-Section Automatic Reset Changeover Switch This product is a three-position, three-section automatic reset changeover switch with a "+ON–OFF–-ON" operating mode. It has a rated current of 20A and is suitable for AC 50/60Hz circuits with a rated voltage of ≤440V and an insulation voltage of 690V.
Features:
Instantaneous Switching and Self-Resetting: When the handle is rotated to the "+ON" or "-ON" position, three sets of circuits are connected respectively (+ON: 3-4, 7-8, 11-12; -ON: 1-2, 5-6, 9-10); when the handle is released, it automatically springs back to the middle "OFF" position, achieving instantaneous and safe on/off control.
Reliable Structure: Features a flame-retardant casing, silver alloy contacts, and thickened copper conductors, providing good insulation performance and stable conductivity.
Lifespan: 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 control or safe resetting, such as three-phase motor forward and reverse jogging, temporary switching of multiple signals/power supplies, equipment debugging and testing, industrial control panels, etc., especially suitable for safety control circuits requiring automatic reset after operation.
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