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20.21.8.008.4000 Finder Modular relay 1phase switch 1 NO AC 8V
Finder 20.21.8.008.4000 digital programmable time switch with 230 V AC supply, weekly scheduling and single changeover relay output for automatic electrical load control.
Why Choose the Finder 20.21.8.008.4000 Digital Time Switch?
The Finder 20.21.8.008.4000 is a compact and reliable digital time switch designed for automatic control of electrical loads in residential, commercial and industrial installations. As part of the trusted Finder 20 Series programmable time switches, it provides accurate scheduling control for lighting, heating, irrigation and automation applications.
This programmable timer combines a clear digital display, weekly scheduling capability and battery-backed memory to provide dependable automatic switching. Its compact modular design allows simple installation on standard DIN rails, making it suitable for electrical distribution boards and automation control panels.
With an 8 A switching capacity, single-channel operation and a 230 V AC supply, the Finder 20.21.8.008.4000 provides flexible time-based control for a wide range of electrical equipment where reliable automation is required.
Key Advantages
- Compact digital programmable time switch for DIN rail installations.
- Weekly programming function for flexible scheduling.
- Single output channel for straightforward load control.
- Battery backup maintains programmed settings during power interruption.
- Space-saving modular design for electrical distribution boards.
- Suitable for lighting, heating and automation applications.
Key Features
- Finder 20 Series digital time switch.
- 1 changeover contact (SPDT).
- 230 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 override function.
- Automatic daylight saving time adjustment.
Reliable Automatic Switching Control
Digital time switches such as the Finder 20.21.8.008.4000 allow electrical loads to be switched automatically according to programmed schedules. This improves energy efficiency by ensuring equipment operates only when required.
The Finder 20 Series is designed for installers requiring dependable programmable control in compact electrical systems. Its DIN rail mounting format and intuitive programming functions make it suitable for modern building automation applications.
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 | 230 V AC | |
| Contacts | 1 C/O | |
| IP Rating | IP20 | |
| Manufacturer | Finder | |
| Series | 20 Series Time Switches | |
| Model | 20.21.8.008.4000 | |
| Product type | Digital programmable time switch | |
| Supply voltage | 230 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 battery backup | |
| Protection rating | IP20 | |
| Module width | 17.5 mm |
Frequently Asked Questions
What is the Finder 20.21.8.008.4000 used for?
The Finder 20.21.8.008.4000 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 230 V AC supply.
How many outputs does the Finder 20.21.8.008.4000 provide?
The time switch provides one changeover relay output for controlling connected electrical loads.
Can this time switch be installed on a DIN rail?
Yes, the Finder 20.21.8.008.4000 is designed for standard 35 mm DIN rail mounting.
Does the timer retain settings during a power failure?
Yes, the time switch includes battery-backed memory to maintain programmed settings during power interruptions.
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.
