Finder 27.23.8.230.4000 – 27 Series Step Relays

Why Choose the Finder 27.23.8.230.4000 Impulse Relay?

The Finder 27.23.8.230.4000 is a compact 10 A electromechanical impulse relay designed for multi-point lighting control in residential and commercial electrical installations. Part of the Finder Series 27 step relay range, it provides a practical method of controlling electrical circuits using momentary push buttons rather than conventional multi-way switching arrangements.

Featuring a 230 V AC operating coil and a 1 normally open (NO) + 1 normally closed (NC) contact configuration, the relay provides two complementary switching functions. Its mechanically maintained impulse mechanism changes the contact state when an appropriate control pulse is applied and retains that state after the pulse ends, eliminating the need for continuous coil energisation.

The Finder 27.23.8.230.4000 uses silver tin oxide (AgSnO2) contacts and incorporates a coil power limiter. Its 10 A contact rating and compact construction make it suitable for compatible lighting loads, corridors, staircases and building control circuits requiring mechanically maintained switching.

Key Advantages

• 10 A rated switching current for compatible lighting and electrical loads.
• 230 V AC operating coil suitable for mains-voltage control circuits.
• 1 NO + 1 NC contact arrangement provides complementary switching functions.
• Mechanically maintained impulse operation retains the selected contact state without continuous coil power.
• Supports lighting control from multiple momentary push-button locations.
• Helps simplify wiring compared with conventional multi-way switching arrangements.
• Silver tin oxide contacts provide dependable electrical switching performance.
• Integrated coil power limiter supports impulse-operated control.
• Suitable for residential, commercial and communal lighting installations.
• Compact electromechanical design for installation in compatible electrical enclosures.

Key Features

• Finder Series 27 electromechanical step relay.
• 10 A rated contact current.
• 230 V AC rated coil voltage.
• 50/60 Hz AC coil operation.
• 1 normally open + 1 normally closed contact.
• Two complementary switching paths.
• On/off impulse switching sequence.
• Mechanically maintained contact position.
• Momentary push-button operation.
• Coil power limiter.
• Silver tin oxide (AgSnO2) contact material.
• Suitable for multi-point lighting control.
• Designed for compatible residential and commercial electrical installations.

Reliable Impulse Switching for Multi-Point Lighting Control

The Finder 27.23.8.230.4000 operates through short electrical impulses applied to its 230 V AC coil. Each appropriate impulse advances the mechanical switching mechanism, changing the states of the normally open and normally closed contacts. The relay retains its selected switching position after the control pulse has ended.

Its 1 NO + 1 NC contact arrangement provides complementary switching. In one position, the normally open contact is closed while the normally closed contact is open; after the next switching impulse, the contact states reverse. This arrangement is useful for applications requiring alternative switching states or coordinated operation of two compatible electrical circuits.

Because the contacts are mechanically maintained, the relay does not require continuous coil energisation to hold its switching position. This makes it particularly practical for lighting installations controlled from several locations, including staircases, corridors, communal areas and commercial premises.

The silver tin oxide contact material supports dependable switching of compatible lighting loads. As with all electromechanical switching devices, connected equipment must remain within the manufacturer's applicable contact ratings, particularly where LED drivers or other loads produce high switching inrush currents.

Typical Applications

• Residential multi-point lighting control.
• Staircase and landing lighting.
• Corridor and hallway lighting installations.
• Communal lighting in apartment buildings.
• Commercial premises and office lighting.
• Lighting circuits operated by momentary push buttons.
• Building automation and lighting control systems.
• Electrical circuits requiring complementary NO and NC switching.
• Lighting installations with multiple control locations.
• Compatible electrically operated changeover-style switching arrangements.
• Electrical refurbishment projects replacing complex multi-way switching.