EATON I-O-II Changeover Switch Z-S/2WM 40A 2-Pole DIN Rail 248346

Manual changeover switches are essential when a circuit must be transferred between two power sources or two load circuits without back-feeding. The EATON Z-S/2WM provides a compact, DIN-rail mounted solution for exactly that task, with a clear I-O-II switching sequence and a 40 A current rating for demanding control and distribution applications.

Who is it for

Panel builders, electricians, and maintenance teams who need a reliable, modular changeover switch for industrial control panels, building services, or machine auxiliary circuits. It fits standard 35 mm DIN rails and occupies only two modules, making it suitable for crowded enclosures.

Main features

• 2-pole changeover switch, I-O-II (On-Off-On) switching positions
• Rated operational current 40 A, operational voltage 230/400 V AC
• Mounts on 35 mm DIN rail (EN 60715), width 2 modules (35.5 mm)
• Screw terminals accept rigid conductors 1.5–25 mm² and flexible 1.5–16 mm²
• Manual operation, mechanical life 20,000 cycles

Specifications

• Number of poles: 2P
• Rated insulation voltage (Ui): 500 V
• Rated impulse withstand voltage (Uimp): 4 kV
• Frequency: 50/60 Hz
• Degree of protection: IP20 terminals, IP40 front face when installed
• Electrical life: 10,000 cycles
• Operating temperature range: -20 to 50 °C
• Short-circuit current rating (Icw): 1.5 kA (1 s)
• Standard compliance: IEC/EN 60947-3

Tips

Always verify the maximum load and switching frequency against the rated electrical life. For motor loads or inductive circuits, consider the inrush current and select an appropriately rated switch. Ensure the enclosure provides adequate ventilation to keep ambient temperature within the specified range.