ZHUCO SZW26X-10C/D303.3Y 1-0-2 Three-position three-section compact locking single-hole mounting changeover switch

The SZW26X-10C/D303.3Y is a compact, three-position (1-0-2), three-section rotary changeover switch with integrated mechanical locking and single-hole mounting. Its key feature is the ability to synchronously switch three independent circuits within a small form factor, providing a lockable safety isolation point in the middle position.
Core Parameters and Features:
Electrical Specifications: Rated operating voltage AC 440V (50/60Hz) / DC 240V, rated current 10A.
Contact Configuration: Provides three independent double-throw switching circuits.
Position 1: Connects the first set of three outputs (contacts 1-2, 5-6, 9-10).
Position 0 (Middle position, lockable): All contacts are completely disconnected. This position allows activation of the built-in mechanical lock to prevent unauthorized operation.
Position 2: Connects the second set of three outputs (contacts 3-4, 7-8, 11-12).
Structure and Installation:
Compact Design: Small size, significantly saving control panel space.
Single-Hole Mounting: Secured to the panel via a threaded back and nut, simple installation requiring only one mounting hole.
Safety Locking Function: Can be locked in the middle "0" (OFF) position with a key for access control and to prevent accidental operation.
Contacts and Materials: Uses silver alloy contacts and thickened copper components to ensure stable and reliable conductivity at 10A current.
Environmental Adaptability: Operating temperature range -25°C to +40°C, altitude ≤ 2000 meters.
Lifespan: Mechanical life ≥ 100,000 cycles; Electrical life ≥ 30,000 cycles (under rated load, operating frequency ≤ 120 times/hour).
Application Scenarios:
This switch is designed for compact equipment or control panels where space is limited, and synchronous control of multiple signals/power sources is required while maintaining operational safety. Control of Small, Complex Equipment: Used for control panels of precision instruments, test benches, communication equipment, and small automation control boxes, enabling multi-channel synchronous switching functions such as "Operating Mode A/Mode B/Stop" and "Power Supply 1/Power Supply 2/Disconnect."
Multi-Circuit Signal and Power Selection: Suitable for applications requiring simultaneous switching of multiple low-voltage control signals, instrument measurement circuits, or auxiliary power supplies, such as signal source switching in data acquisition systems and multi-channel sensor power supply selection.
Safety and Maintenance: Its lockable "0" position provides a safe and reliable electrical isolation point for equipment debugging, calibration, or maintenance, complying with basic safety operating procedures.
High-Density Installation: An ideal alternative to traditional multi-gang switches or bulky changeover switches, especially suitable for rack-mounted equipment, portable instruments, or space-constrained industrial control cabinets.