F&F BIS-411M Bistable Relay 1P 16A 230V AC with Memory

The F&F BIS-411M is a high-quality 1-pole bistable relay engineered for 230V AC electrical circuits, offering a robust 16A switching capacity. This device is specifically designed to facilitate the control of lighting or other electrical loads from multiple points using simple momentary push-buttons. A standout feature of this relay is its integrated memory function, which ensures that the device retains its last switching state even after a power supply interruption, automatically returning to that state once power is restored.

Advantages

The primary benefit of the BIS-411M is its ability to simplify complex wiring for multi-point lighting control, replacing traditional cross-over switches with more reliable and easier-to-install momentary buttons. The built-in memory mechanism provides significant convenience and safety, as it prevents unexpected changes in the state of connected devices following a blackout. Its compact design and high current rating make it a versatile component for both residential and industrial electrical systems, ensuring long-term durability and consistent performance under standard operating conditions.

Suitable for

• Lighting control systems in hallways and staircases
• Multi-point switching of electrical appliances
• Residential and commercial building automation
• Industrial control panels requiring state retention

This relay is not suitable for controlling high-inductive loads that exceed the specified 16A rating or for applications requiring complex timing or dimming functions, as it is strictly a bistable switching device. It is also not intended for use in DC circuits or environments where the voltage significantly deviates from the 230V AC standard.

Key specifications

• Contact configuration: 1-pole (1P)
• Maximum switching current: 16A
• Operating voltage: 230V AC
• Function: Bistable with memory
• Control method: Momentary push-buttons

To use the F&F BIS-411M, connect the relay to the 230V AC power supply and wire the momentary push-buttons in parallel to the control input. Each press of a button will toggle the relay state, switching the connected load on or off. Ensure that all electrical connections are made by a qualified professional in accordance with local safety regulations and the provided wiring diagram.

What to consider before purchase

• Verify that the total load current does not exceed 16A
• Ensure the control circuit is compatible with 230V AC momentary switches
• Check available space in the electrical distribution board for mounting

For optimal performance and longevity, ensure that the relay is installed in a dry, dust-free environment and that all terminal screws are tightened securely to prevent overheating.