Standard delivery
£8 ex VAT · free over £200UK parcel delivery is £8 ex VAT, or free on orders over £200 ex VAT.
Heavier items may be charged at a weight-based or pallet rate, shown at checkout.
20.21.8.230.4000 Finder Modular relay 1phase switch 1 NO AC 230V
Finder 20.21.8.230.4000 modular step relay with a 230 V AC coil and 16 A SPST-NO switching contact for DIN rail mounted control applications.
£20.75
Why Choose the Finder 20.21.8.230.4000 Modular Step Relay?
The Finder 20.21.8.230.4000 is a reliable modular step relay designed for electrical switching and control applications in industrial and building automation systems. Part of the Finder 20 Series, this compact relay provides dependable switching performance with a direct 35 mm DIN rail mounting design.
This step relay is engineered for applications requiring efficient control of lighting circuits, electrical loads and automation equipment. Its integrated mechanical indicator, test button and identification label simplify installation, commissioning and maintenance in professional electrical systems.
With a 230 V AC coil supply and a 16 A switching capacity, the Finder 20.21.8.230.4000 provides reliable single-phase switching performance for industrial, commercial and building automation installations. Its SPST-NO contact configuration enables straightforward integration into electrical control circuits.
Key Advantages
- Compact step relay designed for industrial and building automation.
- 16 A switching current rating suitable for electrical load control.
- 230 V AC coil voltage for standard control applications.
- Direct 35 mm DIN rail mounting for easy installation.
- SPST-NO contact configuration for simple switching operation.
- Integrated test button and mechanical indicator improve servicing efficiency.
Key Features
- Finder 20 Series modular step relay.
- SPST-NO normally open contact configuration.
- 16 A contact current rating.
- 230 V AC coil voltage.
- 250 V AC contact voltage rating.
- 35 mm DIN rail mounting design.
- Screw terminal connections.
- Silver tin oxide contact material.
Reliable Switching for Electrical Control Systems
Step relays such as the Finder 20.21.8.230.4000 provide controlled switching of electrical circuits through pulse commands, making them ideal for applications where multiple switching states or remote control operation are required.
The Finder 20 Series combines compact DIN rail installation with robust electrical performance, allowing engineers and installers to create reliable control solutions for lighting, automation and industrial applications.
Typical Applications
- Lighting control systems.
- Building automation installations.
- Industrial electrical control panels.
- Commercial electrical systems.
- Remote switching applications.
- Automation and control circuits.
Technical Specifications
Tick the specs you need, then view products that match.
| Device Type | Latching / Impulse Relay | |
|---|---|---|
| Terminal Type | Screw | |
| Switching Current (A) | 16 A | |
| Mounting Type | DIN rail | |
| Coil / Supply Voltage | 230 V AC | |
| Contacts | 1NO | |
| IP Rating | IP20 | |
| Manufacturer | Finder | |
| Series | 20 Series | |
| Model | 20.21.8.230.4000 | |
| Product type | Modular step relay | |
| Contact configuration | SPST-NO | |
| Coil voltage | 230 V AC | |
| Contact current | 16 A | |
| Contact voltage | 250 V AC | |
| Mounting type | 35 mm DIN rail mounting | |
| Terminal type | Screw terminals | |
| Contact material | Silver tin oxide | |
| Protection rating | IP20 | |
| Dimensions (H × W × D) | approx. 87.5 × 17.5 × 58.4 mm |
Frequently Asked Questions
What is the Finder 20.21.8.230.4000 used for?
This modular step relay is used for switching and controlling electrical loads in industrial, commercial and building automation systems.
What coil voltage does this relay require?
The Finder 20.21.8.230.4000 operates with a 230 V AC coil supply.
What is the maximum switching current?
The relay supports a maximum contact current of 16 A.
How is the relay mounted?
The relay is designed for direct installation on a standard 35 mm DIN rail.
What type of contact configuration is included?
The relay features a SPST-NO normally open contact configuration.
Trusted by Electrical Engineers Worldwide
Finder 20 Series modular relays are widely used by electrical professionals to provide dependable switching, compact installation and reliable control in modern automation systems.
