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20.21.8.120.0000 Finder Modular relay 1phase switch 1 NO AC 120V
Finder 20.21.8.120.0000 modular step relay with 16 A switching capacity, 120 V AC coil and DIN rail mounting for electrical control applications.
£19.50
Why Choose the Finder 20.21.8.120.0000 Step Relay?
The Finder 20.21.8.120.0000 is a compact and reliable modular step relay designed for electrical installation, lighting control and automation applications where sequential switching of loads is required. Part of the trusted Finder Series 20 step relay range, it provides dependable switching performance with a space-saving DIN rail mounting design.
This relay provides simple and efficient control of electrical loads through impulse commands, allowing multiple switching states from standard push buttons or control devices. Its robust electromechanical construction and integrated indication features make it suitable for residential, commercial and industrial control installations.
With a 120 V AC coil supply, 16 A contact rating and one changeover contact, the Finder 20.21.8.120.0000 is suitable for lighting circuits, building automation systems and electrical control panels requiring reliable step switching operation.
Key Advantages
- Compact modular step relay for electrical installation applications.
- 16 A switching capacity suitable for lighting and general loads.
- 120 V AC coil operation for compatible control systems.
- DIN rail mounting for straightforward installation inside control cabinets.
- Changeover contact configuration provides flexible switching options.
- Mechanical indicator and test button simplify commissioning and maintenance.
Key Features
- Finder Series 20 modular step relay.
- 1 CO contact configuration.
- 16 A rated contact current.
- 120 V AC coil voltage.
- Step / impulse switching operation.
- 35 mm DIN rail mounting design.
- AgNi contact material for reliable switching.
- IP20 protection rating.
Reliable Switching Control for Electrical Installations
Step relays such as the Finder 20.21.8.120.0000 allow electrical loads to be controlled through sequential switching commands. They are commonly used where multiple operating states are required from simple push-button inputs, reducing wiring complexity in control systems.
The Finder Series 20 range is designed for installers and automation professionals requiring dependable switching devices for lighting management, building control and electrical distribution applications.
Typical Applications
- Lighting control systems.
- Building automation installations.
- Electrical distribution panels.
- Industrial control cabinets.
- Commercial electrical installations.
- Push-button controlled switching circuits.
Technical Specifications
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| Device Type | Latching / Impulse Relay | |
|---|---|---|
| Mounting Type | DIN rail | |
| Switching Current (A) | 16 A | |
| Load Voltage | 250 V AC | |
| Coil / Supply Voltage | 120 V AC | |
| Contacts | 1 C/O | |
| IP Rating | IP20 | |
| Manufacturer | Finder | |
| Series | 20 | |
| Model | 20.21.8.120.0000 | |
| Product type | Modular step relay | |
| Relay function | Step / impulse switching | |
| Contact configuration | 1 CO | |
| Rated contact current | 16 A | |
| Coil voltage | 120 V AC | |
| Switching voltage | 250 V AC maximum | |
| Contact material | AgNi | |
| Mounting type | 35 mm DIN rail mounting | |
| Protection rating | IP20 | |
| Width | 17.5 mm |
Frequently Asked Questions
What is the Finder 20.21.8.120.0000 used for?
The relay is used for step or impulse switching of electrical loads in lighting, building automation and control installations.
What coil voltage does this relay require?
The Finder 20.21.8.120.0000 operates with a 120 V AC coil supply.
How much current can the relay switch?
The relay has a rated contact switching capacity of 16 A.
How is this relay mounted?
The relay is designed for installation on a standard 35 mm DIN rail inside electrical enclosures.
What type of contacts are included?
The relay includes a single changeover contact with AgNi contact material.
Trusted by Electrical Installers Worldwide
Finder step relays are widely used by electrical installers and automation engineers to provide reliable switching control, efficient installation and long service life in modern electrical systems.
