Why Choose the Finder 26.03.8.230.4000 Impulse Relay?
The Finder 26.03.8.230.4000 is a compact 10 A electromechanical impulse relay designed for lighting control, building electrical installations and multi-location switching applications. Part of the Finder 26 Series, this mechanically latching step relay enables electrical circuits to be controlled using momentary pushbuttons, providing a practical alternative to conventional multiway switching arrangements.
Featuring a 230 V AC operating coil and one normally open plus one normally closed contact (1 NO + 1 NC), the Finder 26.03.8.230.4000 provides complementary switching functions through a single impulse-operated mechanism. Each valid control impulse changes the relay's contact state, which remains mechanically latched after the impulse ends without requiring continuous coil energisation.
With a 10 A rated contact current, 250 V AC rated switching voltage and 2,500 VA AC1 resistive switching capacity, this relay is suitable for a range of electrical control and lighting applications. Its compact design, screw-terminal connections and panel or recessed mounting arrangement make it particularly useful for residential and commercial electrical installations.
Key Advantages
- 10 A impulse relay designed for lighting and electrical circuit control.
- 230 V AC operating coil suitable for compatible mains-voltage control circuits.
- One normally open and one normally closed contact for complementary switching functions.
- Mechanically latching operation maintains the selected contact state without continuous coil power.
- Enables a lighting circuit to be controlled from multiple momentary pushbutton locations.
- 250 V AC rated switching voltage with a maximum switching voltage of 400 V AC.
- 2,500 VA AC1 switching capacity for suitable resistive loads.
- 4.5 VA nominal coil consumption at 50 Hz.
- Screw-terminal connections simplify wiring and installation.
- Compact construction suitable for panel or recessed mounting.
- Cadmium-free silver nickel contacts provide dependable electromechanical switching.
- Suitable for residential, commercial and building automation installations.
Key Features
- Finder 26 Series electromechanical step relay.
- 26.03 configuration: 1 NO + 1 NC.
- 10 A rated contact current.
- 20 A maximum peak contact current.
- 230 V AC nominal coil voltage.
- 250 V AC rated contact voltage.
- 400 V AC maximum switching voltage.
- 2,500 VA AC1 rated resistive switching load.
- 500 VA AC15 rated switching load at 230 V AC.
- 4.5 VA rated coil consumption at 50 Hz.
- Mechanically latching impulse-operated mechanism.
- Two-position switching sequence.
- Electrically separate coil and contact circuits.
- Silver nickel (AgNi) contact material.
- IP20 protection rating.
- Panel or recessed mounting with screw-terminal connections.
- Suitable for conventional momentary pushbutton control.
Efficient Multi-Location Lighting Control with Mechanical Latching
The Finder 26.03.8.230.4000 uses an electromechanical stepping mechanism to control electrical circuits through momentary impulses. When a suitable signal is applied to its 230 V AC coil, the internal mechanism advances to the next switching position. Once the impulse ends, the relay remains mechanically latched in that position until another valid control impulse is received.
The 1 NO + 1 NC contact configuration provides two complementary switching states. In one position, the normally open contact is closed and the normally closed contact is open. Following the next impulse, the contact states reverse. This makes the Finder 26.03 suitable for applications requiring alternate switching of two electrical circuits or a complementary control indication.
In a typical lighting installation, several momentary pushbuttons can be connected to the relay's control circuit. Operating any pushbutton changes the relay state, allowing the lighting function to be controlled from different locations without complex conventional multiway switch wiring. The mechanical latching arrangement also means the coil does not need to remain energised to maintain the selected contact position.
The relay's compact construction is suited to installation within an appropriately sized electrical mounting box or enclosure. Correct selection of conductor sizes, circuit protection and switching loads is essential, particularly when controlling LED drivers or other loads with significant inrush current.
Typical Applications
- Residential lighting control installations.
- Commercial building lighting systems.
- Multi-location lighting control using momentary pushbuttons.
- Corridor and stairwell lighting circuits.
- Hallways, landings and communal lighting installations.
- Building automation and electrical control systems.
- Complementary switching of two electrical circuits.
- Auxiliary electrical load control.
- Lighting refurbishment and electrical installation upgrades.
- Panel-mounted and recessed electrical control assemblies.
