I recently purchased the Tnisesm 10 Pcs PCB Power Relay DC 5V Coil SPST 4 Pins Mini Electromagnetic PCB Relay T78-4P-5V-BK for a project I was working on. Overall, I found these relays to be decent for their price point. They were easy to install and worked as expected, but there were a few issues that brought my rating down to only 3 stars. Firstly, I found that the relays were somewhat unreliable. Occasionally, they would fail to switch on or off consistently. This was frustrating because it made it difficult to rely on them for my project. Additionally, the plastic housing didn't feel very sturdy. I was worried about damaging them, so I had to handle them with care. If you need something that can withstand harsh conditions, I would recommend looking for a different product. Finally, the coils require 5V DC, which could be a problem if your project requires lower voltage. Make sure to double-check the voltage requirements before purchasing these relays. Overall, if you need a cheap and easy-to-use relay, the Tnisesm PCB Power Relay could be a solid choice. However, if you need something a bit more reliable or durable, you may want to consider a higher-end product.
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