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A relay is a small switch run by a low voltage coil. A solid state relay uses electronic parts instead of moving mechanical parts to switch power on and off.
Specifications
- Part number: 1052-00033-00
- Brand: Fetco
- Part type: Solid state relay
- Amps: 50A
- Height: 2.75 in / 6.99 cm
- Length: 6.3 in / 16.00 cm
- Voltage: 480Vac
- Width: 5.45 in / 13.84 cm
- Coil volts: must be the same
- Action: same contacts, like SPDT or DPDT
- Amps or delay: same or higher rating, same delay
From the maker's and parts sellers' listings for this number. Compare them with the label on your old part.
What this solid state relay does
In electrical systems, a relay uses a small control signal to open and close a path for higher electrical loads. A delay timer waits a few minutes before it lets the compressor restart.
Because it is a solid state relay, it switches power silently without moving internal contacts. This helps it manage power switching smoothly inside the equipment.
Understanding the 1052-00033-00 specifications
The printed label on the part gives important electrical and physical limits. Always match these ratings when looking at a replacement relay.
- Voltage: 480Vac
- Current rating: 50A
- Length: 6.3 in / 16.00 cm
- Width: 5.45 in / 13.84 cm
- Height: 2.75 in / 6.99 cm
How to confirm a replacement matches
When you compare an old relay to a new one, several key ratings must align for safe operation. Coil volts must be the same as the original part. The switching action must match, using the same contacts like SPDT or DPDT.
For electrical capacity, the amps or delay rating must be the same or higher rating, along with the same delay. The physical dimensions of 6.3 in / 16.00 cm length, 5.45 in / 13.84 cm width, and 2.75 in / 6.99 cm height must also fit the mounting space.
Signs of failure and safe replacement steps
A solid state relay can fail if it stays permanently open or remains stuck closed. When this happens, the load it controls will either never receive power or stay on continuously.
Follow these steps to replace the part safely once you have confirmed a match:
- Turn off power at the main breaker.
- Test for power with a reliable meter to be certain no voltage is present.
- Take a clear photo of every wire connected to the old part.
- Disconnect the wires and remove the mounting hardware.
- Mount the new relay in place securely.
- Move wires one at a time to the same spots on the new part, using your photo as a guide.
- Restore electrical power and test the equipment.
Read your old part
- Look at the printed label on your existing solid state relay.
- Confirm the part number reads 1052-00033-00.
- Check that the brand name shown on the part is Fetco.
- Verify the electrical label shows 50A and 480Vac.
- Measure the physical footprint to ensure it matches 6.3 in / 16.00 cm length, 5.45 in / 13.84 cm width, and 2.75 in / 6.99 cm height.
When to call a pro
Hire a licensed HVAC technician or electrician for any step you are not sure you can do safely. Working with high voltage power can be dangerous.
Questions
What voltage does the 1052-00033-00 handle?
This relay is rated for 480Vac. Coil volts must be the same when selecting a replacement part.
What is the amp rating for this relay?
The Fetco 1052-00033-00 is rated for 50A. A replacement relay must have the same or a higher rating.
What are the dimensions of the Fetco 1052-00033-00?
The part measures 6.3 in / 16.00 cm in length, 5.45 in / 13.84 cm in width, and 2.75 in / 6.99 cm in height. Verify your equipment enclosure has space for these dimensions.
How should I keep track of the wiring connections?
Take a photo of every wire before removing the old part. Then move wires one at a time to the same spots on the new part.
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