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Finder 20 Series Power Relay - 20.21.8.230.4000

Finder 20 Series Power Relay - 20.21.8.230.4000

This Finder 20 Series Power Relay features a mechanical switch and is designed for DIN rail mounti...

Best current price£20.06from Tameson UK

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Product Information

Full details

This Finder 20 Series Power Relay is designed for industrial and automation applications requiring reliable switching. It offers a straightforward, mechanically operated SPST-NO contact for controlling loads up to 16A at 230 VAC. Its primary benefit is its compact, DIN rail mountable design for easy integration into control panels. A key consideration is its mechanical switching nature, which means it's best suited for applications where continuous cycling is not the primary concern and a robust, simple solution is preferred.

All features

Series20 Series
Model Part Number20.21.8.230.4000
BrandFinder

Extended Product Information

FAQs

What is the coil voltage for this relay?

The coil voltage for the Finder 20 Series Power Relay 20.21.8.230.4000 is 230 VAC.

What type of contact does this relay have?

It features one Normally Open (SPST-NO) contact.

What is the maximum switching current and voltage?

The relay is rated for a maximum switching current of 16 A and a maximum voltage of 230 VAC.

How is this relay mounted?

It is designed for mounting on a standard 35mm DIN rail.

Can this relay be used for DC loads?

No, this relay is specifically designed for AC loads and AC coil operation. Using it with DC loads or DC coil voltage is not recommended and may lead to failure.

What does '1 graduation unit' mean?

It refers to the width of the relay, indicating it occupies a standard module width on a DIN rail, typically around 17.5mm or 18mm, allowing for standardized spacing in enclosures.

Is this a bistable or monostable relay?

This is a monostable relay. It requires continuous power to the coil to keep the contact closed. When power is removed from the coil, the contact returns to its normal state (open).

Troubleshooting

Relay does not switch when coil is energized.

Verify that the correct control voltage (230 VAC) is applied to the coil terminals (A1 and A2). Check wiring connections for tightness. Ensure the relay is not physically damaged.

Load does not operate when relay switches.

Confirm that power is supplied to the common terminal of the NO contact. Check that the load itself is functioning correctly. Ensure the wiring between the NO terminal and the load is secure.

Relay contacts are welded or stuck.

This indicates a failure due to overloading or a short circuit. The relay likely needs to be replaced. Investigate the cause of the overload/short circuit in the load circuit.

Intermittent operation or poor connection.

Check all wiring connections for tightness. Ensure the relay is securely mounted on the DIN rail. Clean the exterior of the relay if it appears dirty.

Pros and Cons

Pros

  • Compact and space-saving design
  • Easy DIN rail mounting for quick installation
  • Reliable mechanical switching for straightforward control
  • High switching current rating (16A) suitable for many loads
  • Standard 230 VAC coil voltage simplifies integration into existing systems

Cons

  • Single Normally Open (NO) contact limits circuit complexity
  • Mechanical switching may have a finite lifespan under very high duty cycles compared to solid-state relays
  • Not suitable for high-frequency switching applications
  • Requires manual wiring for connections

Setup, Compatibility & Care

Setup:

  1. Mounting: Snap the relay onto a standard 35mm DIN rail within your electrical enclosure. Ensure it clicks securely into place.
  2. Wiring: Connect the control voltage (230 VAC) to the coil terminals (typically marked A1 and A2).
  3. Load Connection: Connect the power source to the common terminal of the NO contact and the load to the normally open terminal.

Compatibility:

  • Coil Voltage: This relay is designed for 230 VAC coil operation. Ensure your control signal matches this voltage.
  • Load Voltage/Current: Suitable for AC loads up to 230 VAC and 16 A. Do not exceed these ratings.
  • Mounting: Requires a standard 35mm DIN rail.

Care:

  • Environment: Operate within the specified temperature and humidity ranges. Avoid dusty or corrosive environments.
  • Cleaning: Disconnect power before cleaning. Use a dry or slightly damp cloth to wipe the exterior. Avoid solvents.
  • Inspection: Periodically inspect wiring connections for tightness and signs of wear.

Price History

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