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Rapid Online - Rapid Electronics Ltd.£17.09Visit shop Finder 22.21.8.012.4000 Relay SPST-NO 20A 12VAC
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The Finder DIN Rail Power Relay (model 22.22.9.012.4000) is designed for professionals in commercial HVAC, lighting, and heating systems who need a compact and reliable switching solution. Its key benefit is the high 20A switching capacity with dual normally open contacts in a space-saving 17.5mm width, DIN rail mountable design. A potential caveat is its 12VDC coil voltage, which requires a compatible DC power source.
| Series | 22 Series |
|---|---|
| Model Part Number | 22.22.9.012.4000 |
| Brand | Finder |
This relay has a switching capacity of 20A at 250VAC (AC1 rating).
It features a DPST-NO (Double Pole, Single Throw - Normally Open) configuration, meaning it has two independent sets of contacts that are closed when the coil is energized.
While it is designed for 35mm DIN rail mounting, you may be able to adapt it for panel mounting with custom brackets, but this is not the intended installation method.
The manual test button allows you to manually operate the relay's contacts to check circuit continuity or test connected devices without needing to energize the 12VDC coil.
The relay provides 4kV isolation between the coil and the contacts, measured at 1.2/50µs.
The relay is designed to operate within a temperature range of -40°C to 40°C.
Yes, it can switch inductive loads, but it's recommended to derate the current handling capacity compared to resistive loads. Check the AC3 ratings or consult the datasheet for specific guidance.
Verify the 12VDC coil voltage supply is correct and connected to the A1/A2 terminals. Check for any breaks in the control wiring. Ensure the manual test button is not held in the 'test' position.
Confirm the coil is receiving the correct 12VDC. If the coil voltage is correct and the relay still does not energize, the coil may be faulty. Ensure the load connected to the contacts does not exceed the 20A rating.
Check that the connected load does not exceed the 20A/250VAC rating. Ensure the wiring connections to the relay terminals are clean, tight, and adequately sized for the current. Verify the contact material is suitable for the load type (e.g., resistive vs. inductive).
Ensure the load current does not exceed the specified rating. Verify adequate ventilation within the enclosure. If the relay is constantly energized and the ambient temperature is high, consider derating the load or using a relay with a higher temperature rating.
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