Why 3SV9 auxiliary switches?
The 3SV9 auxiliary switch is built for complexity made simple. With around 300 available variants, its modular architecture supports 2–26 auxiliary contact levels (selectable as normally closed (NC), normally open (NO) or changeover contacts), and a wide palette of mechanical options: multiple contact lengths, letter-coded contact styles, optional manual switching contacts, selectable rotation direction (left or right) and configurable rotation angles. This depth of configurability lets engineers tailor the device precisely to the control- and safety-circuit requirements of modern switchgear.
Key benefits
Custom fit
Precisely configurable contacts, rotation and lengths to match exact control and safety requirements.
Lower inventory
Fewer spares across warehouses, simplifying procurement and reducing stock costs.
Reliable operation
Rugged, predictable switching behavior ensures dependable performance in mission-critical secondary circuits.