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20.21.9.012.4000 Finder step relay 1phase switch 1NO DC 12V
Finder 20.21.9.012.4000 impulse relay with 12 V DC coil, SPST-NO contact and 16 A switching rating for electrical control applications.
£20.75
Why Choose the Finder 20.21.9.012.4000 Impulse Relay?
The Finder 20.21.9.012.4000 is a compact and reliable modular impulse relay designed for switching and controlling electrical loads in industrial, commercial and building automation applications. Part of the Finder Series 20 impulse relay range, it provides dependable latching operation controlled by push buttons or momentary switching contacts.
This relay features a single normally open contact configuration with a mechanical indicator and integrated test button for simple installation, commissioning and maintenance. Its modular DIN rail mounting design allows easy integration into electrical distribution boards and control cabinets.
With a 12 V DC coil supply, a 16 A switching rating and a single normally open contact, the Finder 20.21.9.012.4000 provides reliable impulse switching for lighting control, automation systems and electrical installations.
Key Advantages
- Compact impulse relay for electrical switching applications.
- 16 A contact rating suitable for general electrical loads.
- 12 V DC coil operation for low-voltage control systems.
- DIN rail mounting enables simple installation in distribution panels.
- Mechanical indicator and test button simplify commissioning and maintenance.
- Latching operation reduces continuous coil energisation requirements.
Key Features
- Finder Series 20 impulse relay.
- Single pole normally open (SPST-NO) contact.
- 16 A rated contact current.
- 12 V DC coil voltage.
- DIN rail mounting design.
- Mechanical indicator for status visibility.
- Integrated test button.
- Screw terminal connection.
Reliable Switching for Electrical Automation
Impulse relays such as the Finder 20.21.9.012.4000 provide efficient control of electrical circuits by changing contact state each time a control pulse is received. This makes them ideal for applications requiring multiple control points using momentary push buttons.
Finder Series 20 relays are designed for electricians, panel builders and automation professionals requiring reliable switching performance, compact installation and long-term operational stability.
Typical Applications
- Lighting control systems.
- Building automation installations.
- Electrical distribution panels.
- Industrial control cabinets.
- Remote push-button switching systems.
- Automation and control applications.
Technical Specifications
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| Device Type | Latching / Impulse Relay | |
|---|---|---|
| Timing Function | Pulse | |
| Switching Current (A) | 16 A | |
| Load Voltage | 400 V AC | |
| Mounting Type | DIN rail | |
| Coil / Supply Voltage | 12 V DC | |
| Contacts | 2NO | |
| IP Rating | IP20 | |
| Manufacturer | Finder | |
| Series | 20 Series Impulse Relays | |
| Model | 20.21.9.012.4000 | |
| Product type | Impulse relay | |
| Coil voltage | 12 V DC | |
| Contact configuration | 1 NO (SPST-NO) | |
| Contact rating | 16 A | |
| Maximum switching voltage | 400 V AC | |
| Maximum switching capacity | 6400 VA | |
| Mounting type | DIN rail mounting | |
| Coil type | Latching, single coil | |
| Termination type | Screw terminals | |
| Protection rating | IP20 |
Frequently Asked Questions
What is the Finder 20.21.9.012.4000 used for?
This impulse relay is used for switching electrical loads through momentary control pulses in automation and electrical installations.
What coil voltage does this relay require?
The Finder 20.21.9.012.4000 operates with a 12 V DC coil supply.
What current can the relay switch?
The relay has a contact rating of 16 A for electrical switching applications.
How is the Finder 20.21.9.012.4000 installed?
The relay is designed for DIN rail mounting inside electrical distribution boards and control cabinets.
What type of contact configuration does the relay have?
The relay features a single normally open (SPST-NO) contact.
Trusted by Electrical Automation Professionals
Finder impulse relays are widely used by electricians and automation professionals to provide reliable switching control, efficient installation and dependable performance in electrical systems.
