Finder 22.21.8.012.4000 – 22 Series Modular monostable relays

Why Choose the Finder 22.21.8.012.4000 Modular Installation Relay?

The Finder 22.21.8.012.4000 is a robust and reliable 20 A modular installation relay designed for switching electrical loads in residential, commercial and industrial control systems. As part of the Finder Series 22 modular contactor and installation relay range, it provides dependable electromechanical switching in a compact DIN rail-mounted format.

Featuring a 12 V AC operating coil and a single normally open (NO) contact arrangement, the relay allows low-voltage control circuits to operate higher-current electrical loads. Its monostable operating mechanism ensures that the contacts return to their normal position when the coil is de-energised, making it suitable for lighting control, electrical distribution and automated switching applications.

With a rated switching current of 20 A, a maximum AC contact switching voltage of 400 V AC and a compact modular width of approximately 17.4 mm, the Finder 22.21.8.012.4000 is ideal for installation in electrical distribution boards and control panels. Its integrated manual test button, identification label and screw-terminal connections help simplify installation, testing and maintenance.

Key Advantages

• Reliable 20 A modular installation relay for electrical switching and automation applications.
• 12 V AC coil voltage suitable for low-voltage control circuits.
• Single normally open contact provides straightforward switching of connected loads.
• Monostable electromechanical operation automatically returns the relay to its normal state when the coil is de-energised.
• Maximum 400 V AC contact switching voltage supports a wide range of electrical installations.
• Compact 17.4 mm modular width helps conserve valuable DIN rail space.
• Integrated manual test button simplifies commissioning and functional testing.
• 35 mm DIN rail mounting provides convenient installation in standard electrical enclosures.
• Durable silver alloy contacts provide reliable electrical switching performance.
• Screw-terminal connections enable secure electrical wiring.
• Suitable for lighting circuits, distribution boards and automated load switching.

Key Features

• Finder Series 22 modular installation relay.
• 20 A rated switching current.
• 12 V AC rated coil voltage.
• Single normally open (1 NO) contact configuration.
• Monostable, non-latching relay mechanism.
• Maximum 400 V AC contact switching voltage.
• 50/60 Hz coil operating frequency.
• Silver alloy contact material for dependable switching.
• Manual test button for convenient operation checks.
• Integrated identification label for circuit recognition.
• 35 mm DIN rail mounting in accordance with EN 60715.
• IP20 protection rating.
• Compact 17.4 mm housing width.
• Screw-terminal electrical connections.
• Suitable for residential, commercial and industrial electrical installations.

Reliable Electrical Switching for Distribution and Automation Systems

Modular installation relays such as the Finder 22.21.8.012.4000 provide an effective method of controlling electrical loads through separate control circuits. When the 12 V AC coil is energised, the relay's normally open contact closes, allowing current to flow to the connected load. When the control voltage is removed, the monostable mechanism returns the contact to its normally open position.

The Finder Series 22 is designed for installation in electrical distribution boards and control cabinets where dependable switching, compact construction and straightforward wiring are important. The relay's 20 A contact rating makes it suitable for a variety of lighting and general electrical load-control applications, provided the connected load remains within the relevant manufacturer switching limits.

The integrated manual test button supports commissioning and maintenance, while the DIN rail-mounted housing allows convenient integration alongside circuit breakers, timers and other modular control components. Its silver alloy contacts and electromechanical switching design provide a practical solution for electrical installations requiring reliable remote or automatic load control.

Typical Applications

• Residential electrical distribution boards and consumer control panels.
• Commercial building lighting control systems.
• Industrial electrical control cabinets.
• Remote switching of compatible electrical loads.
• Automatic lighting control using timers and control circuits.
• Building management and automation systems.
• Electrical load switching in workshops and commercial premises.
• Control circuits using 12 V AC operating signals.
• Modular electrical distribution and switching assemblies.
• Automation panels requiring compact DIN rail-mounted relays.