Bistable Relay FF FW-R2D, Coil 85–265V AC/DC, Two Stable Positions

Bistable relay FF FW-R2D features a wide-range coil that accepts 85–265V AC or DC and maintains its last switching position without continuous power to the coil. The device provides two stable contact states ideal for control circuits where holding position after actuation is required. Its compact design allows integration into automation panels, lighting control systems, and building management installations where reduced energy consumption and reliable position retention are needed.

Advantages

The bistable mechanism eliminates the need for continuous coil power, reducing energy consumption and heat generation. Wide coil voltage range (85–265V AC/DC) supports flexible installation across various supply environments. Two stable positions provide reliable state retention after power loss or control signal removal, while compact form factor simplifies panel and DIN-rail mounting. The relay is suitable for repeated switching cycles and offers predictable electrical behaviour for control logic integration.

Suitable for

• Lighting control systems requiring memory of last state
• Remote switching in automation and control panels
• Building management systems for energy-saving switching
• Circuits where reduced standby power is important

Key specifications

• Coil voltage range: 85–265V AC/DC
• Operation: bistable (two stable positions)
• Intended use: switching and holding contact positions in control circuits
• Mounting: panel or DIN-rail compatible compact design
• Application environments: automation, lighting control, building management

How to use

Install the bistable relay in the control panel or on a DIN rail according to mounting instructions and local electrical regulations. Connect the coil to an 85–265V AC or DC supply and wire the relay contacts into the switched circuit following the intended control logic. Actuate the coil momentarily to change the contact position; the relay will remain in that state after the coil is de-energized. Verify correct wiring and functionality with suitable test procedures before placing into regular operation.

Usage recommendations

Ensure correct voltage polarity when using DC supply and protect the relay circuit with appropriate overcurrent protection. Use the relay within its rated electrical and environmental limits and incorporate contact protection (snubbers or RC networks) when switching inductive loads to prolong contact life.