Tnisesm 2PCS Power Relay AC120V Coil, 30A SPDT(1NO 1NC) with Flange Mounting and 10 Quick Connect Terminals Wires Mini Relay NT90-AC120V-10X

These relays are well made and work great. I liked the sealed design and wire leads provided.

A relay is a fairly simple device. Apply the signal to the control terminals, and the output terminals close (or open). This relay did the job for me, and has been working for the better part of a year without issues. I like that it includes pigtails with the proper connectors to fit the relay terminals. That saved me effort in tracking down and procuring said connectors. My use case is a controller for the energy recovery ventilator (ERV). For my size house, the ERV is supposed to have a 50% duty cycle - 30 minutes on, 30 minutes off per hour. But the HVAC contractor installed it to run continuously. The ERV has a controller input: closed circuit turns on the ERV, open circuit turns it off. I installed a simple mechanical timer that switches 120 VAC and connected to the relay control. The ERV control wires go to the relay normally open (NO) terminals. When the timer energizes the relay, ERV controls are shorted together and the unit runs. Half an hour later the timer de-energizes the relay, the NO terminals open, and the ERV turns off. Works like a charm. The relay comes in a 2-pack, so I have another one for another home automation project, when needed.

I used one of these as a safety relay in a circuit with a solid state relay, in case the SSR failed in closed mode. I used the other one to protect a circuit with a triac, in case it failed in closed mode.

These relays are rather small and compact. The male terminal blades for the coil, both hot and neutral, are 1/8"- 3/16" size, not the standard 1/4" type male spade terminal. The wires that come with the relays have the necessary sized female spade terminals which feature a clear vinyl protective sheath, but unfortunately do not come in unique color coding to avoid confusion. For example, the neutral wire to the coil should be white, the hot wire to coil should be black with a white stripe, the common hot wire should be solid black, and the switched hot wires could be red and black with a red stripe. Overall, these relays are a good value.

Chose these relays as part of an enhanced control system for an attic ventilation fan. I needed 120 VAC coil relays to simplify the control voltage part of the circuit. The relays work well. The enclosed relay coil wires have the smaller crimp lugs attached that the relay needs and are small gauge (20 awg) but the the coil only draws a max. of 3 watts at 120 VAC so the coil wire size is adequate. Bench testing with a 160 watt fan motor showed the relay in latched condition (coil energized) passing 160 watts through the contacts leads to a 40F temperature rise above ambient. I'm not comfortable with this temperature rise in a 120F attic so the controls are kept in conditioned air space. The relays are a good value once you understand their limitations. Relay does not have UL markings but does have CE markings.

Good relays. The cables provided are real copper, about 7 in. long each.

The item works great as described. AC connector is the small terminal connectors for people that are confused. Other connectors on the relay when the relay is not energized with the AC power the connectors inside will allow power to go from the COM connector to one terminal that is large. When the AC relay is energized the connector inside the relay will allow the COM connector terminal that is large to go to the other large connector. The AC connector that is small does not pass any power to the large connectors at all they are isolated from each other. Using the large connectors is an open and door circuit That you choose to allow power to pass through in the closed position when the AC power is energized on one large terminal connection and when the AC power is turned off it will allow the power that is hooked up to it to pass through the other side. Again these two AC small connectors are only AC power only to energize the Relay only. On the COM connector, you hook up the positive DC and you choose the other large connector if you want the power to come out when the AC power is on will allow one LARGE terminal to be active, and when the power is turned off to allow the DC power to go through the other LARG terminal that is large completing your connection circuit. Hopefully, this helps everyone out. You take your AC power and you hook it directly to SMALL Connectors from your AC directly to the AC relaying if you were hooking up any device you would hook it directly to the relay as if you were hooking up a lightbulb. You would hook up AC POWER ON THE SMALL CONNECTORS ONLY the Black on one small connector and White wire on one small connector in any direction on the small terminals that will activate the magnetic coil. Hooking up the AC power to the small terminals directly will not short out the relay that is designed to receive AC power. Hopefully, my explanation will be helpful to all customers.

I have an attic fan whose internal thermostat failed. I wanted to replace it with an external thermostat. The fan has a DC motor. All of the fan thermostats that I could find were designed to control AC fans. My solution was to connect the AC thermostat to this relay's AC coil, and connect the DC-rated output to the DC motor. It worked perfectly.

Ce produit fonctionne bien.

Very reliable relay.

Excellent value for the function , small footprint makes installation easy in tight spaces

Parfait

Work as they should.