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The SZW26-32/D303.BF is a three-position (1-0-2) changeover switch with a rated current of 32A and IP65 protection. Its core design features a three-section (three-layer) contact structure, allowing simultaneous switching of three independent dual-circuit circuits via a single operating handle. In position "1", the first set of contacts (1-2, 5-6, 9-10) is connected; in position "2", the second set of contacts (3-4, 7-8, 11-12) is connected; the intermediate position "0" ensures all contacts are safely disconnected, providing a clear electrical isolation point. It is suitable for AC 440V/50-60Hz circuits, with a rated insulation voltage of up to 660V. It uses thickened copper components and silver alloy contacts, and the internal terminal screws are M4, compatible with 2.5-6.0 mm² wires. With a mechanical life of no less than 100,000 cycles and an electrical life of no less than 30,000 cycles, its sealed protective housing can withstand dust and low-pressure water spray, and it is designed for harsh outdoor or industrial environments.
Main Technical Parameters
Electrical Specifications: Rated operating current 32A; Rated operating voltage AC 440V (50/60Hz); Rated insulation voltage 660V.
Contact Configuration: Three-section (layer) structure, with a total of 12 terminals, enabling three-way synchronous switching.
Protection Rating: IP65 (dustproof, water-jet resistant).
Wiring Capacity: M4 terminal screws, wire range 2.5 – 6.0 mm², tightening torque 1.2 N·m.
Life Indicators: Mechanical life ≥ 100,000 cycles; Electrical life ≥ 30,000 cycles (under rated load).
Operating Environment: Suitable for industrial environments with temperatures ranging from -25°C to +40°C and altitudes ≤2000m.
Application Scenarios
This switch is specifically designed for applications requiring centralized and reliable manual switching of multiple interconnected power supplies, loads, or control signals in harsh environments such as dusty, humid, or outdoor conditions.
Master Control and Mode Switching in Harsh Environments: Serves as the master switch for control cabinets in enclosures, mobile construction machinery, marine equipment, and wet zone control cabinets in food and beverage or pharmaceutical workshops. It enables multi-state switching such as "primary system/stop/standby system" and "automatic operation/safety isolation/manual adjustment." Its IP65 protection ensures reliable operation in water spray, splash, and high humidity environments.
Comprehensive Motor Control and Protection: Suitable for manual control of "high speed/stop/low speed" of dual-speed three-phase asynchronous motors, or for controlling "forward/stop/reverse" operation of motors with independent cooling, lubrication, and other auxiliary circuits, achieving multi-circuit linkage.
