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40.51.7.021.0300 Finder Miniature PCB relay 1pole 10A DC 21V
Finder 40.51.7.021.0300 miniature electromechanical relay with a 21 V DC coil and 12 A switching capability designed for industrial control and automation applications.
Why Choose the Finder 40.51.7.021.0300 Miniature PCB Relay?
The Finder 40.51.7.021.0300 is a compact and reliable electromechanical miniature relay designed for switching and control applications in industrial automation, electrical panels and electronic equipment. As part of the proven Finder 40.51 relay series, it provides dependable switching performance with a sensitive DC coil and a space-saving PCB or socket mounting design.
This relay combines a robust contact system with low coil power consumption, making it suitable for control circuits where reliability, efficiency and compact installation are important. The Finder 40.51 series is widely used in automation systems, industrial controls and OEM equipment requiring dependable interface switching.
With a 21 V DC coil and a 12 A contact rating, the 40.51.7.021.0300 is suitable for switching electrical loads in control panels, machinery and electronic control systems. Its miniature construction allows efficient installation where panel space is limited.
Key Advantages
- Compact miniature electromechanical relay for industrial control applications.
- 21 V DC sensitive coil for efficient control operation.
- 12 A switching capability for reliable load control.
- Single pole normally open contact configuration.
- PCB and socket mounting compatibility for flexible installation.
- Robust construction suitable for automation and OEM equipment.
Key Features
- Finder 40.51 miniature relay series.
- 21 V DC coil voltage.
- 12 A contact current rating.
- SPST-NO contact configuration.
- AgNi contact material for reliable switching performance.
- Monostable relay operation.
- Low coil power consumption of approximately 0.5 W.
- Compact design for PCB or socket mounting.
Reliable Switching for Industrial Control Systems
Electromechanical relays such as the Finder 40.51.7.021.0300 provide electrical isolation between control signals and switched loads, allowing automation equipment and electronic systems to safely control higher current circuits.
The Finder 40.51 series is designed for engineers requiring compact, dependable switching components. Its miniature format, efficient coil design and flexible mounting options make it suitable for a wide range of industrial and electronic applications.
Typical Applications
- Industrial automation control panels.
- Machine control and OEM equipment.
- PLC interface and switching circuits.
- Building automation systems.
- Electronic control equipment.
- General purpose industrial switching applications.
Technical Specifications
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| Device Type | Plug-in Relay | |
|---|---|---|
| Mounting Type | PCB, Plug-in socket | |
| Switching Current (A) | 12 A | |
| Coil / Supply Voltage | 21 V DC | |
| Contacts | 1NO | |
| Manufacturer | Finder | |
| Series | 40.51 Miniature Relays | |
| Model | 40.51.7.021.0300 | |
| Product type | Electromechanical miniature relay | |
| Coil voltage | 21 V DC | |
| Contact configuration | SPST-NO | |
| Contact current rating | 12 A | |
| AC contact rating | 12 A / 250 V AC | |
| Contact material | AgNi | |
| Coil power consumption | 0.5 W | |
| Mounting type | PCB / socket mounting | |
| Coil resistance | 900 Ω | |
| Protection category | RT II | |
| Operating temperature | -40 to +85 °C | |
| Dimensions (H × W × D) | approx. 25 × 12.4 × 29 mm | |
| Weight | approx. 20 g |
Frequently Asked Questions
What is the Finder 40.51.7.021.0300 used for?
The relay is used for switching electrical loads in industrial automation, control panels and electronic control systems.
What coil voltage does this relay require?
The Finder 40.51.7.021.0300 uses a 21 V DC coil.
What current can the relay switch?
The relay has a contact rating of up to 12 A with a 12 A / 250 V AC resistive load rating.
What type of contacts does the relay have?
The relay features a SPST-NO normally open contact configuration with AgNi contact material.
Where is this relay typically installed?
The relay is commonly installed on printed circuit boards or used with compatible sockets in industrial control applications.
Trusted by Automation Engineers Worldwide
Finder miniature relays are widely used in industrial automation and control applications where reliable switching, compact installation and long service life are required.
