Why Choose the Finder 26.03.8.048.4000 Impulse Relay?
The Finder 26.03.8.048.4000 is a 10 A electromechanical impulse relay designed for lighting control, electrical installations and building automation applications. Part of the established Finder 26 Series, this step relay provides an effective way to control electrical circuits using momentary pushbuttons rather than conventional maintained switches.
Featuring a 48 V AC operating coil and a two-contact arrangement comprising one normally open and one normally closed contact (1 NO + 1 NC), the Finder 26.03.8.048.4000 offers dependable mechanical switching through a latching impulse mechanism. Each valid electrical impulse advances the relay to its next switching state, allowing the contacts to remain in their selected position without continuous coil energisation.
With a 10 A rated contact current, 250 V AC rated switching voltage and 2,500 VA AC1 resistive switching capacity, the Finder 26.03 is suitable for a range of lighting and auxiliary control applications. Its compact construction, screw-terminal connections and installation-friendly design make it particularly useful for residential, commercial and industrial electrical systems.
Key Advantages
- 10 A impulse relay for lighting and electrical control applications.
- 48 V AC nominal coil voltage for compatible low-voltage AC 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 lighting circuits to be operated from multiple momentary pushbutton locations.
- 250 V AC rated switching voltage for suitable electrical loads.
- 2,500 VA AC1 switching capacity for resistive loads.
- Screw-terminal connections provide straightforward electrical wiring.
- Compact design suitable for installation within compatible electrical enclosures.
- Reduces the need for conventional multiway switching arrangements.
- Electromechanical operation provides a clear, repeatable switching sequence.
- Suitable for lighting automation, building services and electrical installation projects.
Key Features
- Finder 26 Series electromechanical step relay.
- 26.03 contact configuration: 1 NO + 1 NC.
- 10 A rated contact current.
- 48 V AC operating coil.
- 250 V AC rated contact voltage.
- 2,500 VA AC1 rated switching load.
- 500 VA AC15 rated switching load.
- Impulse-operated mechanical latching mechanism.
- Two-position switching sequence controlled by successive impulses.
- Suitable for momentary pushbutton control circuits.
- Separate coil and contact circuits.
- Screw-terminal electrical connections.
- Compact installation format for compatible mounting boxes and enclosures.
- Cadmium-free contact construction in the 26 Series.
- Suitable for lighting control and building electrical installations.
How the Finder 26.03 Impulse Relay Works
The Finder 26.03.8.048.4000 operates using an electromechanical stepping mechanism. When a momentary electrical signal is applied to its 48 V AC coil, the internal mechanism changes the position of the relay contacts. The new contact state remains mechanically latched after the control signal is removed, eliminating the need to keep the coil continuously energised.
The 1 NO + 1 NC contact arrangement allows the relay to provide complementary switching functions. As the relay changes state, one contact closes while the other opens. This makes the 26.03 configuration useful for applications requiring alternating circuit states or a change in the operating condition of connected electrical equipment.
Impulse relays are particularly effective in lighting installations where a single circuit must be controlled from several locations. Multiple momentary pushbuttons can be connected to the control circuit, allowing each pushbutton to advance the relay to its next state. The switching contacts can then control the connected load within their rated capacity. The 48 V AC coil supply must be provided separately from the load circuit where required by the installation design.
Typical Applications
- Residential lighting control systems.
- Commercial building lighting installations.
- Multi-location lighting control using momentary pushbuttons.
- Corridor and stairwell lighting control.
- Building automation and electrical installation systems.
- Auxiliary circuit switching.
- Electrical control panels and distribution assemblies.
- Lighting circuit upgrades and refurbishment projects.
- Low-voltage AC pushbutton control systems.
- Applications requiring complementary normally open and normally closed contact states.
