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The SZW26-32 D303.3EF is an industrial-grade rotary changeover switch with a rated current of 32A. It features an integrated design with a (three-layer) contact structure and an IP65 high-protection-rating housing. A single handle allows simultaneous switching of three independent dual-circuit circuits, enabling centralized selection of two complex operating states, and providing complete and safe electrical isolation in the middle "0" position.
Function and Logic: In position "1", the first group of three contacts (1-2, 5-6, 9-10) is connected; in position "2", the second group of three contacts (3-4, 7-8, 11-12) is connected; the middle "0" position ensures all contacts are open. This switch is suitable for AC 440V/50-60Hz circuits with a rated insulation voltage of 660V. The product uses a flame-retardant and high-temperature resistant housing, and the internal components are thickened copper conductors and silver alloy contacts, ensuring long-term reliability of the electrical connection. Its IP65 protective housing completely protects against dust intrusion and low-pressure water spray from any direction. Mechanical life ≥ 100,000 cycles, electrical life ≥ 30,000 cycles.
Main Technical Parameters
Rated Specifications: Operating current 32A; Operating voltage AC 440V (50/60Hz); Insulation voltage 660V.
Contact Configuration: Three-section structure, 12 terminals in total, enabling three-way synchronous switching.
Protection Rating: IP65 (dustproof, water-jet resistant).
Wiring Specifications: M4 terminal screws, suitable for wires 2.5 – 6.0 mm², tightening torque 1.2 N·m.
Mechanical and Electrical Life: Mechanical life ≥ 100,000 cycles; Electrical life ≥ 30,000 cycles (under rated load, operating frequency ≤ 120 times/hour).
Operating Environment: Suitable for industrial and outdoor environments with temperatures ranging from -25°C to +40°C and altitudes ≤2000m.
Application Scenarios: This switch is specifically designed for industrial applications requiring synchronous and reliable manual switching of multiple interconnected power supplies, control signals, or loads in harsh environments such as dust, humidity, or outdoor conditions.
Multi-functional Control for Outdoor/Harsh Environment Equipment: Serves as a master switch for control panels in outdoor electrical control cabinets, mobile engineering equipment, marine deck machinery, and wet areas of food, beverage, or pharmaceutical workshops. It enables overall switching between "System A/Stop/System B," synchronously controlling the main power supply, backup control circuits, and status indicators. Its IP65 protection ensures reliable operation under conditions of water spray, high humidity, and dust.
