Bistable Contactor Etipo RBS420-40-230V AC, 20A, 4-pole, 2-module

The Etipo RBS420-40-230V AC bistable contactor is a 4-pole, 2-module switching device rated for 20 A with a 230 V AC control coil. Designed for latching operation, the contactor retains its last switched position without continuous coil excitation, reducing standby power consumption. Its compact two-module width and four switched poles make it suitable for installation in DIN-rail electrical distribution boards where space efficiency and reliable remote on/off switching are required.

Advantages

The bistable design provides stable mechanical latching, eliminating the need for constant coil current and lowering energy use in standby. Four independent poles enable simultaneous switching of multiple circuits or multi-phase loads up to 20 A each. The two-module form factor saves panel space and allows straightforward mounting on standard DIN rails. The 230 V AC coil matches common building control voltages, simplifying integration with existing control systems and automation equipment.

Suitable for

• Lighting circuits and group switching in residential and commercial installations
• Motor control for small motors and fans where latching control is desired
• Building automation systems requiring remote on/off switching with low standby consumption
• Switching of multiple single-phase circuits or control of balanced three-phase loads using combined poles

Key specifications

• Contact configuration: 4 poles
• Rated switching current: 20 A
• Control coil voltage: 230 V AC
• Modular width: 2 modules (DIN-rail mountable)
• Operation: bistable (latching) mechanism that maintains contact state without continuous coil power

How to use

Install the contactor on a standard DIN rail in the distribution board, ensuring correct orientation and secure mechanical fixation. Connect line and load conductors to the appropriate pole terminals, observing applicable wiring standards and ensuring conductor sizes match the 20 A rating. Supply the 230 V AC control signal to the coil terminals according to the control schematic; a brief pulse to the set or reset coil changes and latches the output state. Verify proper operation after wiring by actuating the control inputs and measuring continuity or load response.

Usage recommendations

Use circuit protection sized for the intended load and conforming to local electrical codes. Avoid switching highly inductive loads at rated current without appropriate suppression or inrush-current mitigation. For repeated or safety-critical switching, incorporate auxiliary contacts or monitoring to confirm contact state within the automation system.