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40.52.9.021.0003 Finder Miniature PCB relay 2pole 8A DC 21V
Finder 40.52.9.021.0003 miniature electromechanical relay with 21 V DC coil, DPDT contacts, 8 A switching capacity and lockable test button for industrial control applications.
Why Choose the Finder 40.52.9.021.0003 Miniature PCB Relay?
The Finder 40.52.9.021.0003 is a compact electromechanical PCB relay designed for reliable switching and electrical isolation in industrial automation, control panels and electronic equipment. As part of the established Finder 40 Series miniature relay range, it provides dependable operation with a dual changeover contact configuration and a 21 V DC coil supply.
This miniature relay combines a space-saving construction with robust switching performance, making it suitable for applications requiring dependable control of electrical loads. The relay includes an integrated lockable test button and mechanical indicator to simplify commissioning, testing and maintenance procedures.
With a 21 V DC coil and 8 A contact rating, the Finder 40.52.9.021.0003 is suitable for industrial control systems, automation equipment and electrical applications where compact dimensions, visual status indication and reliable switching are required.
Key Advantages
- Compact miniature electromechanical relay for automation and control applications.
- 21 V DC coil voltage for specialised low-voltage control circuits.
- 8 A switching capability for general-purpose electrical loads.
- DPDT (2CO) contact configuration provides flexible circuit switching.
- Integrated lockable test button and mechanical indicator for easier testing and diagnostics.
- Suitable for PCB mounting and compatible Finder relay socket installation.
Key Features
- Finder 40 Series miniature relay.
- 21 V DC coil supply.
- DPDT / 2CO contacts.
- 8 A rated switching current.
- 250 V AC contact rating.
- AgNi contact material.
- Lockable test button.
- Mechanical operation indicator.
- PCB or socket mounting design.
Reliable Switching for Industrial Control Systems
Electromechanical relays such as the Finder 40.52.9.021.0003 provide reliable switching and electrical isolation between control circuits and connected loads. The integrated indicator and test button support efficient installation checks, maintenance and fault diagnosis.
The Finder 40 Series is designed for engineers and equipment manufacturers requiring compact relay solutions for automation, electrical panels and industrial control applications. Its proven construction enables straightforward integration into a wide range of electrical systems.
Typical Applications
- Industrial automation systems.
- Electrical control panels.
- OEM machinery and equipment.
- Building and electrical control systems.
- Electronic switching applications.
- Control and monitoring circuits.
Technical Specifications
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| Device Type | Plug-in Relay | |
|---|---|---|
| Mounting Type | PCB, Plug-in socket | |
| Switching Current (A) | 8 A | |
| Coil / Supply Voltage | 21 V DC | |
| Contacts | 2 C/O | |
| Manufacturer | Finder | |
| Series | 40 Series | |
| Model | 40.52.9.021.0003 | |
| Product type | Miniature electromechanical relay | |
| Contact configuration | DPDT (2CO) | |
| Rated coil voltage | 21 V DC | |
| Contact current | 8 A | |
| Contact voltage | 250 V AC | |
| Contact material | AgNi | |
| Mounting type | PCB / socket mounting | |
| Dimensions | approx. 29 × 12.4 × 25 mm | |
| Operating temperature | -40 to +85 °C |
Frequently Asked Questions
What is the Finder 40.52.9.021.0003 used for?
The Finder 40.52.9.021.0003 is a miniature electromechanical relay used for switching and isolation in industrial automation, control panels and electronic systems.
What coil voltage does this relay require?
The relay operates with a 21 V DC coil supply.
What is the contact rating of the Finder 40.52.9.021.0003?
The relay has an 8 A contact rating with contacts suitable for switching loads up to 250 V AC.
What additional features does this relay include?
The relay includes a lockable test button and mechanical indicator to assist with testing and visual status checks.
How is this relay installed?
The Finder 40.52.9.021.0003 is designed for PCB mounting or installation with compatible Finder relay sockets.
Trusted by Automation Engineers Worldwide
Finder 40 Series relays are trusted in industrial automation and electrical control applications where compact size, reliable switching and proven performance are required.
