Finder 13.31.9.024.4300 – 13 Series Electronic step relays

Why Choose the Finder 13.31.9.024.4300 Installation Switching Relay?

The Finder 13.31.9.024.4300 is a compact 24 V DC electromechanical monostable switching relay from the Finder Series 13.31 range. Designed for installation in flush-mounted electrical boxes and deep switch boxes, it features one normally open (1 NO) contact rated at 12 A, providing a practical solution for switching lighting circuits and other compatible electrical loads.

With a 24 V DC control coil consuming 0.4 W, the relay allows suitably rated mains-powered circuits to be controlled from a separate low-voltage DC signal. Its silver tin oxide (AgSnO2) contact material and 3,000 VA AC1 switching capacity make it suitable for a range of building control and electrical automation applications.

Measuring just 37 × 22.7 × 39 mm, the Finder 13.31.9.024.4300 is particularly useful where installation space is limited. It also features IP20 protection, screw terminal connections and an operating temperature range of −10 to +60 °C, supporting dependable integration into appropriately protected electrical installations.

Key Advantages

• 24 V DC control voltage for compatible low-voltage switching systems.
• 12 A normally open contact for switching suitably rated electrical loads.
• 3,000 VA AC1 switching capacity for resistive loads.
• Low coil power consumption of 0.4 W.
• Compact dimensions for installation in flush-mounted and deep switch boxes.
• AgSnO2 contact material for reliable electromechanical switching.
• Monostable operation provides switching controlled by the applied DC signal.
• Suitable for appropriately rated incandescent, halogen, fluorescent and LED lighting loads.
• 200 W LED lamp rating for suitable 230 V AC lighting applications.
• Operating temperature range of −10 to +60 °C.
• IP20 protection rating for installation within suitable enclosures.
• Screw terminal connections support conventional electrical wiring.
• Suitable for residential, commercial and industrial building control applications.
• Part of the established Finder Series 13 installation relay range.

Key Features

• Finder Series 13.31 installation switching relay.
• Manufacturer reference: 13.31.9.024.4300.
• Relay technology: Electromechanical.
• Operating principle: Monostable, non-latching.
• Contact configuration: 1 normally open (SPST-NO).
• Rated contact current: 12 A.
• Nominal coil voltage: 24 V DC.
• Nominal coil power: 0.4 W.
• Nominal contact switching voltage: 250 V AC.
• Maximum AC switching voltage: 400 V AC.
• AC1 switching capacity: 3,000 VA.
• Contact material: Silver tin oxide (AgSnO2).
• Maximum specified inrush current: 80 A for 5 ms.
• Incandescent lamp rating: 800 W.
• LED lamp rating at 230 V AC: 200 W.
• Electrical endurance at AC1: 70,000 cycles.
• Mounting: Flush-mounted box or deep switch box.
• Terminal type: Screw terminals.
• Protection rating: IP20.

Reliable 24 V DC Switching for Lighting and Building Control

Modern electrical installations often require lighting and other electrical loads to be controlled using a low-voltage DC signal. The Finder 13.31.9.024.4300 provides this functionality through a 24 V DC electromechanical coil and a 12 A normally open contact, allowing suitable control devices to operate a separate electrical switching circuit.

The relay uses a monostable operating principle. When the appropriate voltage is applied to the coil, the normally open contact closes. When the control voltage is removed, the relay returns to its normal open position. This behaviour makes it suitable for applications requiring maintained-signal switching rather than mechanically latched operation.

Its AgSnO2 contacts are designed for reliable electrical switching and are suitable for a range of lighting technologies. Finder specifies ratings for incandescent, halogen, fluorescent, compact fluorescent and LED lamps. For example, the relay supports a specified 200 W LED lamp load at 230 V AC, subject to the characteristics of the connected lighting equipment.

LED drivers and other electronic loads can generate significant inrush currents when energised. The Finder 13.31.9.024.4300 has a specified 80 A inrush capability for 5 ms, but the connected load must still be assessed against the applicable lamp rating, switching frequency and electrical protection requirements.

The compact 37 × 22.7 × 39 mm housing is intended for installation in suitable flush-mounted boxes or deep switch boxes. This makes the relay particularly useful for local lighting control applications where space is restricted and a separate DIN rail enclosure may not be necessary.

With a 0.4 W coil, the relay provides a low-power control interface. Its IP20 protection rating requires installation in an enclosure appropriate to the surrounding conditions, particularly where moisture, dust or accidental contact may be present.

For reliable operation, the control supply must be compatible with the relay's 24 V DC coil, and the connected load must remain within the relevant switching ratings. Installation and maintenance should be carried out by a competent person with the associated circuits safely isolated.

Typical Applications

• Residential lighting control installations.
• Commercial building lighting circuits.
• Office and workplace lighting systems.
• Bathroom and hallway lighting control.
• Bedroom and living room lighting switching.
• 24 V DC controlled electrical switching circuits.
• Remote switching of compatible lighting loads.
• Building automation and electrical control equipment.
• Flush-mounted electrical installations.
• Industrial and commercial control systems.
• OEM lighting control assemblies.
• Maintenance and replacement of existing Finder Series 13.31 relays.