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Finder 22.21.8.110.4000 – 22 Series Modular monostable relays
Finder 22.21.8.110.4000 Series 22 modular installation relay with a 20 A SPST-NO contact, 110 V AC operating coil, 400 V AC maximum switching voltage, silver tin oxide contacts and compact DIN rail mounting for lighting control, electrical distribution and building automation applications.
£20.11
Why Choose the Finder 22.21.8.110.4000 Modular Installation Relay?
The Finder 22.21.8.110.4000 is a compact and reliable 20 A modular installation relay designed for remote 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 110 V AC operating coil and a single normally open contact, providing dependable switching for lighting, building services and electrical automation applications.
Designed for direct mounting onto standard DIN rails, the Finder 22.21.8.110.4000 combines robust electrical performance with a space-saving modular housing. Its 17.4 mm width occupies approximately one modular space in an electrical distribution board, making it suitable for installations where panel space is limited. The relay incorporates a practical manual test button, screw terminal connections and silver tin oxide contacts designed for reliable electrical switching.
With a 20 A rated contact current, a 110 V AC coil supply and a maximum switching voltage of 400 V AC, the Finder 22.21.8.110.4000 is suitable for controlling compatible lighting circuits, electrical heating, ventilation equipment and general electrical loads. Its IP20 protection rating and standard 35 mm DIN rail mounting make it a practical solution for electrical distribution boards, building automation systems and industrial control panels.
Key Advantages
- Compact 20 A modular installation relay designed for dependable electrical load switching.
- 110 V AC operating coil suitable for compatible industrial and building control circuits.
- Single normally open (SPST-NO) contact for straightforward electrical switching.
- 250 V AC rated contact voltage for suitable mains-powered electrical loads.
- 400 V AC maximum switching voltage provides flexibility for compatible electrical installations.
- 17.4 mm slim housing saves space inside distribution boards and control cabinets.
- Silver tin oxide (AgSnO₂) contacts provide reliable switching performance, including for suitable lighting loads.
- Integrated manual test button simplifies commissioning and functional testing.
- 35 mm DIN rail mounting enables convenient installation in standard electrical enclosures.
- Monostable operation automatically returns the contact to its normal state when the coil is de-energised.
Key Features
- Finder Series 22 modular installation relay.
- 20 A rated contact current with a maximum peak current of 30 A.
- 110 V AC nominal coil voltage.
- 50/60 Hz AC coil operation.
- 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 capacity.
- Silver tin oxide (AgSnO₂) contact material.
- 970 Ω nominal coil resistance.
- 15 ms operate time and 8 ms release time.
- Integrated manual test button for functional checks.
- IP20 protection rating for suitable enclosed installations.
- 17.4 mm modular width for compact electrical distribution boards.
- 35 mm DIN rail mounting in accordance with EN 60715.
- Monostable, non-latching operation for conventional relay control.
Reliable Electrical Switching for Building and Industrial Control
Modular installation relays such as the Finder 22.21.8.110.4000 allow electrical loads to be controlled remotely through a separate operating circuit. When the 110 V AC coil is energised, the relay's internal electromechanical mechanism closes the normally open contact, allowing electrical current to flow to the connected load. When the coil supply is removed, the relay automatically returns to its normal open position, disconnecting the load.
The Finder Series 22 is designed for electrical installers, panel builders and automation engineers requiring dependable switching within compact electrical enclosures. Its 20 A contact rating, silver tin oxide contacts and standard DIN rail mounting make it suitable for lighting control, electrical distribution and building services applications. The integrated test button assists with commissioning and maintenance, while the slim modular construction allows convenient installation alongside other DIN rail components.
Typical Applications
- Residential and commercial electrical distribution boards.
- Remote switching of indoor and outdoor lighting circuits.
- Garden, street and car park lighting control.
- Hotel room electrical control and energy-enabling systems.
- Office lighting and building automation installations.
- Bathroom lighting and ventilation control.
- Electrical heating circuits within specified load ratings.
- Pump control circuits and associated electrical equipment.
- Industrial electrical control panels and automation systems.
- General-purpose electrical load switching using 110 V AC control circuits.
Technical Specifications
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| Terminal Type | Screw | |
|---|---|---|
| Device Type | Modular contactor | |
| Coil Type | AC | |
| Coil Voltage Range | 100–130 V | |
| Manufacturer | Finder | |
| Series | 22 Series Modular Relays | |
| Type | 22.21 | |
| Model | 22.21.8.110.4000 | |
| Product type | Modular installation relay | |
| Relay technology | Electromechanical | |
| Operating principle | Monostable / non-latching | |
| Number of poles | 1 | |
| Contact configuration | SPST-NO (1 Form A) | |
| Normally open contacts | 1 | |
| Rated contact current | 20 A | |
| Maximum peak contact current | 30 A | |
| Rated contact voltage | 250 V AC | |
| Maximum switching voltage | 400 V AC | |
| Rated switching capacity (AC1) | 5000 VA | |
| Rated switching capacity (AC15 at 230 V AC) | 1000 VA | |
| DC1 breaking capacity at 30 V DC | 20 A | |
| DC1 breaking capacity at 110 V DC | 0.3 A | |
| DC1 breaking capacity at 220 V DC | 0.12 A | |
| Nominal coil voltage | 110 V AC | |
| Coil frequency | 50/60 Hz | |
| AC coil operating voltage range | 85–110% of nominal voltage | |
| Nominal coil resistance | 970 Ω | |
| Contact material | Silver tin oxide (AgSnO₂) | |
| Operate time | 15 ms | |
| Release time | 8 ms | |
| Mechanical life | 500,000 operations | |
| Electrical life at rated AC1 load | 50,000 operations | |
| Insulation impulse withstand voltage between coil and contacts | 4 kV | |
| Operating temperature | −40 to +40 °C | |
| Protection rating | IP20 | |
| Mounting type | 35 mm DIN rail (EN 60715) | |
| Terminal type | Screw terminals | |
| Manual test function | Integrated test button | |
| Modular width | 17.4 mm | |
| Dimensions (H × W × D) | approximately 84 × 17.4 × 58.4 mm | |
| Maximum incandescent / halogen lamp load at 230 V AC | 1000 W | |
| Maximum fluorescent lamp load with electronic ballast | 400 W | |
| Maximum fluorescent lamp load with electromechanical ballast | 360 W | |
| Maximum compact fluorescent lamp load | 200 W | |
| Maximum 230 V AC LED lamp load | 200 W | |
| Mounting environment | Electrical distribution boards and control cabinets | |
| Country of origin | Italy | |
| EAN | 8012823273891 |
Frequently Asked Questions
What is the Finder 22.21.8.110.4000 used for?
The Finder 22.21.8.110.4000 is a modular installation relay designed to switch electrical loads remotely using a separate control circuit. It is commonly used in lighting control, electrical distribution boards, building automation and industrial control systems.
What is the contact current rating of the Finder 22.21.8.110.4000?
The relay has a 20 A rated contact current and a maximum peak current of 30 A. The permissible switching load depends on the electrical load type, operating voltage and applicable utilisation category.
What coil voltage does the Finder 22.21.8.110.4000 require?
The relay requires a 110 V AC nominal coil supply operating at 50/60 Hz. This voltage energises the relay mechanism and is separate from the voltage applied to the switched contacts.
What contact configuration does this Finder relay have?
The Finder 22.21.8.110.4000 features one normally open contact (1 NO / SPST-NO). The contact closes when the coil is energised and returns to the open position when the coil supply is removed.
Can the Finder 22.21.8.110.4000 switch 230 V AC loads?
Yes. The relay has a 250 V AC rated contact voltage and a maximum switching voltage of 400 V AC, making it suitable for compatible 230 V AC loads within its specified current and switching capacity ratings. The operating coil requires a separate 110 V AC supply.
Can this relay be used for LED lighting control?
Yes. The Finder 22.21.8.110.4000 uses silver tin oxide contacts and can switch compatible LED lighting loads. The Series 22 specifies a nominal 200 W LED lamp load at 230 V AC, although the actual permitted load depends on the LED driver characteristics and switching inrush current.
Does the Finder 22.21.8.110.4000 fit onto a DIN rail?
Yes. The relay is designed for installation onto a standard 35 mm DIN rail conforming to EN 60715. Its compact 17.4 mm width occupies approximately one modular space inside an electrical distribution board or control cabinet.
Does the Finder 22.21.8.110.4000 include a manual test button?
Yes. The relay incorporates an integrated manual test button that assists with commissioning and functional testing. Testing should always be carried out in accordance with the manufacturer's instructions and appropriate electrical safety procedures.
Is the Finder 22.21.8.110.4000 a latching relay?
No. The Finder 22.21.8.110.4000 is a monostable, non-latching relay. Its normally open contact remains closed while the coil is energised and automatically opens when the coil supply is removed.
What is the protection rating of the Finder 22.21.8.110.4000?
The relay has an IP20 protection rating and is intended for installation inside suitable electrical distribution boards or control cabinets that provide the environmental protection required for the application.
Trusted by Electrical Installers and Automation Professionals
Finder Series 22 modular installation relays provide dependable electrical switching for residential, commercial and industrial applications. The Finder 22.21.8.110.4000 combines a 20 A contact rating, 110 V AC operating coil, silver tin oxide contacts, compact DIN rail construction and integrated manual test functionality to deliver a practical solution for lighting control, building automation and electrical distribution systems.
