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20.21.8.110.4000 Finder Modular relay 1phase switch 1 NO AC 110V
Finder 20.21.8.110.4000 digital programmable time switch with 110 V AC supply, weekly scheduling, 8 A switching capacity and changeover relay output for automatic electrical control.
£20.75
Why Choose the Finder 20.21.8.110.4000 Digital Time Switch?
The Finder 20.21.8.110.4000 is a compact and reliable digital programmable time switch designed for automatic control of electrical loads in residential, commercial and industrial installations. As part of the trusted Finder 20 Series digital time switches, it provides accurate scheduling control for lighting, heating, irrigation and building automation applications.
This programmable timer combines a clear digital display, weekly programming capability and battery-backed memory to provide dependable automatic switching. Its modular housing enables installation on standard 35 mm DIN rails, making it suitable for electrical distribution boards and control panels where reliable time-based automation is required.
With a 110 V AC supply voltage, 1 changeover contact and an 8 A switching capacity, the Finder 20.21.8.110.4000 provides flexible scheduling control for electrical equipment in automation and energy management systems.
Key Advantages
- Compact digital programmable time switch for DIN rail mounting.
- Weekly programming function for flexible automatic switching.
- 8 A relay output suitable for lighting and automation loads.
- 110 V AC power supply for dedicated electrical installations.
- Battery-backed memory preserves programmed schedules.
- Manual override function for convenient local control.
Key Features
- Finder 20 Series digital time switch.
- 1 changeover (CO/SPDT) relay contact.
- 110 V AC supply voltage.
- 8 A rated switching current.
- Weekly programming capability.
- Digital LCD display for programming and status indication.
- DIN rail mounting design.
- Manual switching override.
- Automatic daylight saving time adjustment.
Reliable Automatic Switching Control
Digital time switches such as the Finder 20.21.8.110.4000 provide accurate scheduling of electrical loads, helping improve energy efficiency by ensuring equipment operates only when required.
The Finder 20 Series combines compact installation, dependable relay switching and intuitive programming to deliver a practical automation solution for modern electrical systems.
Typical Applications
- Lighting automation systems.
- Commercial building control.
- Heating and ventilation scheduling.
- Irrigation control systems.
- Electrical distribution boards.
- Industrial automation panels.
Technical Specifications
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| Device Type | Latching / Impulse Relay | |
|---|---|---|
| Switching Current (A) | 8 A | |
| Mounting Type | DIN rail | |
| Coil / Supply Voltage | 110 V AC | |
| Contacts | 1 C/O | |
| IP Rating | IP20 | |
| Manufacturer | Finder | |
| Series | 20 Series Digital Time Switches | |
| Model | 20.21.8.110.4000 | |
| Product type | Digital programmable time switch | |
| Supply voltage | 110 V AC | |
| Contact configuration | 1 CO (SPDT) | |
| Rated current | 8 A | |
| Programming | Weekly | |
| Mounting type | 35 mm DIN rail mounting | |
| Display type | LCD digital display | |
| Backup | Internal rechargeable battery | |
| Protection rating | IP20 | |
| Module width | 17.5 mm |
Frequently Asked Questions
What is the Finder 20.21.8.110.4000 used for?
The Finder 20.21.8.110.4000 is a digital programmable time switch used for automatic control of lighting, heating and other electrical loads.
What supply voltage does this Finder time switch require?
The unit operates from a 110 V AC supply.
What type of output contact does the Finder 20.21.8.110.4000 provide?
The time switch provides one changeover (CO/SPDT) relay output.
Can this time switch be installed on a DIN rail?
Yes, the Finder 20.21.8.110.4000 is designed for standard 35 mm DIN rail mounting.
Does the timer retain programmed settings during a power interruption?
Yes, the unit includes battery-backed memory to maintain programmed schedules.
Trusted by Electrical Installers Worldwide
Finder programmable time switches provide reliable scheduling control, compact installation and efficient automation for residential, commercial and industrial electrical systems.
