Finder 22.21.8.024.4000 – 22 Series Modular monostable relays

Why Choose the Finder 22.21.8.024.4000 Modular Installation Relay?

The Finder 22.21.8.024.4000 is a compact and reliable 20 A modular installation relay designed for electrical load switching in residential, commercial and industrial control systems. As part of the Finder Series 22 modular relay range, this monostable electromechanical relay features a 24 V AC operating coil and a single normally open contact, providing dependable remote switching of electrical circuits.

Designed for direct mounting onto standard DIN rails, the Finder 22.21.8.024.4000 combines robust switching performance with a space-saving modular housing. Its 17.4 mm width occupies approximately one modular space in an electrical distribution board, making it particularly suitable for installations where panel space is limited. The relay also incorporates a practical test button, screw terminal connections and durable silver tin oxide contacts for reliable electrical switching.

With a 20 A rated switching current, a 24 V AC coil supply and a maximum switching voltage of 400 V AC, the Finder 22.21.8.024.4000 is suitable for controlling lighting circuits, electrical heating, ventilation equipment and general electrical loads within its specified ratings. Its IP20 protection rating and standard 35 mm DIN rail mounting make it an effective choice for electrical distribution boards, building automation and control panel applications.

Key Advantages

• Compact 20 A modular installation relay for electrical switching applications.
• 24 V AC operating coil suitable for low-voltage control circuits.
• Single normally open (SPST-NO) contact for straightforward load control.
• Maximum switching voltage of 400 V AC for compatible electrical loads.
• 17.4 mm slim housing occupies approximately one DIN rail modular space.
• Silver tin oxide (AgSnO₂) contacts provide dependable switching performance.
• Integrated test button simplifies commissioning and functional checks.
• 35 mm DIN rail mounting enables quick installation in distribution boards and control panels.
• Screw terminal connections provide secure electrical wiring.
• Monostable operation ensures the contact returns to its normal state when the coil is de-energised.

Key Features

• Finder Series 22 modular installation relay.
• 20 A rated contact current.
• 24 V AC nominal coil voltage.
• 50/60 Hz coil supply frequency.
• 1 normally open contact (1 NO / SPST-NO).
• 250 V AC rated contact voltage.
• 400 V AC maximum switching voltage.
• 5000 VA rated AC1 switching load.
• 3 VA nominal coil power consumption.
• 41 Ω nominal coil resistance.
• 135 mA nominal coil current.
• 15 ms operate time and 8 ms release time.
• AgSnO₂ contact material for reliable load switching.
• Integrated test button for manual functional testing.
• IP20 protection rating.
• 17.4 mm modular width for compact DIN rail installations.
• Monostable, non-latching relay operation.

Reliable Electrical Switching for Control and Distribution Systems

Modular installation relays such as the Finder 22.21.8.024.4000 allow electrical loads to be switched using a separate control circuit. When the 24 V AC coil is energised, the internal electromechanical mechanism closes the normally open contact, allowing current to flow to the connected load. When the coil supply is removed, the relay automatically returns to its normal open state, disconnecting the load.

The Finder Series 22 is designed for electrical installers, panel builders and automation engineers requiring reliable switching within compact electrical enclosures. Its 20 A contact rating, silver tin oxide contacts and convenient DIN rail mounting make it suitable for building services, lighting control and electrical distribution applications. The integrated test button also assists with installation checks and maintenance, while the modular construction simplifies integration alongside other DIN rail electrical components.

Typical Applications

• Residential and commercial electrical distribution boards.
• Remote switching of lighting circuits.
• Building automation and electrical control systems.
• Electrical heating control within rated load limits.
• Ventilation and building services equipment.
• Industrial control panels and electrical cabinets.
• Low-voltage control circuits operating higher-voltage loads.
• Electrical installation and panel-building projects.
• Automated lighting and facility management systems.
• General-purpose electrical load switching.