Finder 13.31.8.012.4300 – 13 Series Electronic step relays

Why Choose the Finder 13.31.8.012.4300 Installation Switching Relay?

The Finder 13.31.8.012.4300 is a compact 12 V AC electromechanical switching relay from the Finder Series 13.31 range, designed for installation in flush-mounted boxes and deep switch boxes. Featuring a single normally open (1 NO) contact rated at 12 A, it provides a practical solution for remotely switching lighting circuits and other compatible electrical loads.

Designed for residential, commercial and industrial building control applications, the Finder 13.31.8.012.4300 combines a 12 V AC control input with a contact switching capacity of 3,000 VA for AC1 resistive loads. Its silver tin oxide (AgSnO2) contacts are suitable for applications requiring dependable electrical switching, including appropriately rated lighting installations.

With compact dimensions of 37 × 22.7 × 39 mm, an IP20 protection rating and an operating temperature range of −10 to +60 °C, this relay is well suited to installation within suitable electrical enclosures. Its monostable operating principle makes it particularly useful where a load must remain energised only while the control signal is present.

Key Advantages

• 12 V AC control voltage for compatible low-voltage control circuits.
• 12 A normally open contact for switching appropriately rated electrical loads.
• 3,000 VA AC1 switching capacity for resistive load applications.
• Compact installation dimensions suitable for flush-mounted and deep switch boxes.
• AgSnO2 contact material supports reliable electrical switching.
• Monostable operation provides predictable control according to the applied coil voltage.
• Suitable for switching incandescent, halogen, fluorescent and compatible LED lighting loads.
• IP20 protection rating for installation within appropriate electrical enclosures.
• Operating temperature range of −10 to +60 °C.
• Supports remote switching from suitable control devices.
• Screw terminal connections facilitate conventional electrical wiring.
• Part of the established Finder Series 13 installation relay range.

Key Features

• Finder Series 13.31 electromechanical installation relay.
• Manufacturer reference: 13.31.8.012.4300.
• Relay operating principle: Monostable.
• Contact configuration: 1 normally open (SPST-NO).
• Rated contact current: 12 A.
• Nominal control voltage: 12 V AC.
• Control frequency: 50/60 Hz.
• Nominal switching voltage: 250 V AC.
• Maximum switching voltage: 400 V AC.
• AC1 switching capacity: 3,000 VA.
• Contact material: Silver tin oxide (AgSnO2).
• Rated incandescent and mains halogen lamp load: 800 W.
• Rated LED lamp load at 230 V AC: 200 W.
• Installation: Flush-mounted electrical box or deep switch box.
• Terminal arrangement: Screw terminals.
• Protection rating: IP20.
• Dimensions: 37 × 22.7 × 39 mm.

Reliable Switching for Lighting and Building Control Systems

Electrical installations frequently require a method of switching mains-powered loads using a separate low-voltage control circuit. The Finder 13.31.8.012.4300 provides this functionality through an electromechanical relay with a 12 V AC coil and a 12 A normally open contact.

Its monostable operating principle means the relay changes state when the appropriate control voltage is applied and returns to its normal state when that voltage is removed. This distinguishes it from mechanically latching impulse relays, which maintain their switching state after a momentary control pulse. The 13.31.8.012.4300 should therefore be selected for circuits requiring monostable switching behaviour.

The relay's AgSnO2 contact material is suitable for a range of electrical loads, including lighting equipment. Finder specifies load ratings for incandescent, halogen, fluorescent, compact fluorescent and LED lamps. Because lighting equipment can generate substantial inrush currents, the applicable lamp-specific rating should be checked rather than relying solely on the general 12 A contact rating.

The compact housing allows the relay to be installed within suitable flush-mounted boxes or deep switch boxes. This makes it useful for lighting control arrangements where switching equipment must be positioned close to the associated wiring rather than mounted in a separate distribution cabinet.

Its IP20 rating provides basic protection against access to hazardous parts and ingress of larger solid objects, but does not provide protection against water. The relay should therefore be installed within an appropriate enclosure selected for the environmental conditions of the application.

For reliable operation, the control supply must be compatible with the specified 12 V AC operating range, and the connected load must remain within the relay's electrical ratings. Installation and maintenance should be performed by a competent person with the relevant circuits safely isolated.

Typical Applications

• Residential lighting control circuits.
• Commercial building lighting installations.
• Bathroom and hallway lighting control.
• Bedroom and living room lighting systems.
• Office lighting switching arrangements.
• Low-voltage controlled mains switching circuits.
• Remote switching of compatible lighting loads.
• Building automation and electrical control systems.
• Flush-mounted electrical installations.
• Electrical maintenance and replacement relay applications.
• OEM building control equipment.
• Small electrical control and automation assemblies.