THC15A AC 110V Digital LCD Power Programmable Timer Time Switch Relay 16A Amp White

I have used this timer/switch for several months now and have come to like it quite a bit. The timer programming takes a few minutes to figure out but once you have its easy to use and repeatably accurate. The connections allow easy access for the wires and the screw down compression clamps hold even stranded wire in place pretty well. Overall it is a nice neat package with a nice display. The only addition I would like to see is a momentary backlight on the display so you can see it better when the ambient light is low. Other than that it's a great timer and its DIN mountable to it can be colocated with other modules. Update: I noticed a few reviewers had trouble configuring for 12Vdc operation. Be sure to order the correct version and for wiring I have uploaded a diagram - Also note, although there is a 12Vdc load shown in the example an AC load may be used but be sure to remove all DC connections going to the relay and load. Tip: Test the set up by using the timer's on/off control before programming it for smart operation. Warning: AC can be lethal so, if you are not sure about what you are doing get someone to help you.

1. The diagram in the instruction is 100% correct. This is a relay switch so the power source for the switch can be different from line-in. If you want your line-in to power the switch, connect PORT1 to PORT5. 2. This relay supports both NO and NC. For NC connect PORT4 to PORT5 and use PORT3 to drive load. 3. The flexible timer programming will cover every imaginable scenario. There are 28 ON/OFF schedules with different day of the week activation (e.g. everyday, weekend, every other day, odd/even day, etc) already included. I've gradually replacing all my Dayton mechanical timers with this: it's around $10 versus $50 and the mechanical Intermatic timer has plastic gears that fails on 3 yrs average with very rigid and dumb mechanical programming. Last, this switch is for 110/125V AC power source driving AC load (should theoretically work for DC load via separate common DC ground but did not test). If you need DC or 220V AC see another variation. Hope this helps. I **LOVE** that someone made this switch and at an excellent value.

Everyone's application will be different and depending on the application, this little timer may receive good reviews while others will receive poor reviews. My application involves security and it seems to be doing a pretty good job so far. I have a small office with a double-locked door lobby and instead of implementing a door controller with RFID and such, I decided to go with a timer and door strike. I have several door controllers and unless you pay big money for a big brand and big money for installation, you will end up with a door controller system, costing around $250 with Chinese tech support, pay-to-play modules, and account maintenance (otherwise the monitoring app expires). I have all these and I got tired of my employees being locked out every few months. Anyway, is this product good for security? Well, no, and it won't work for everyone. My lobby has a locked front door and locked entry door, so for my application, unlocking the front door between, say, 8am to 5pm, works just fine. My employees still need a separate key to unlock the inner entry door. I use this just to let early deliveries to drop off packages. With that being said, I connected everything up the way I planned: the timer and power supply are always powered up, with the NC door strike connected to the "NO" contact on the timer, 12VDC to the timers output center, and the door strike returns to GND on the power supply. Simple as pie. Now the quality of the timer itself seems to be pretty good. We all know these are all Chinese-made products, but for a Chinese-made product, this one seems on the upscale. I don't like how the window opens, as there are no thumb-grooves or serrations for any grip. The "nub" makes it a bit hard to open, but I suppose once you set it, just forget it. The timer follows some loose DIN standards and it is quite compact, which is nice. However, sitting next to my Meanwell power supply, the control panel is sunk awkwardly deep, but there are really only 2 components in this system, I can space them out on an 8" DIN rail. The reaction time of the relay seems slow. My application, this if fine since I don't think anyone will need to open the door at exactly 8:00.000000am. But keep in mind, the reaction time is slow, possibly 1-2 seconds. I assume most people will use these as automatic light switch or something similar, since it has provisions for MTWThFSSn, which means the timer will be triggered at least once per day. There are about 15 programs or something. I scrolled through and stopped at 15, so potentially 15 times, 7 days a week. Keep in mind relays are susceptible to arcing, and will get damaged with use so this may not be a good choice for a frequently triggered timer. The way I see it, if the relay lasts 10,000 switches, and I trigger once a day, it will last 27 years. I can live with that. On another note, I also use the cheap DIN PID controllers and I mistakenly purchased one with relays. The relay did not last 15 minutes. I suspect this will be no different, so this timer is good as a "once a day" timer. It seems to have an internal battery, which is a plus for when power goes out. I'm not sure at this moment if the battery is user-serviceable or not. Without opening the product, this may affect the longevity of the product. The Manual button, at least on the one I received is not reliable. I may have to press it 2-3 times for it to register, but all it is doing is cycling through ON-Auto-OFF, anyway, so it's not too critical. I doubt I will touch it much once everything is installed. It is pretty easy to program, very straight forward. However, once you start overthinking your application, like I did, I wish it had provisions for daylight savings or digital output to connect to an Arduino or similar. I may connect the output to a relay/SSR board and send signals through Wifi or Bluetooth. Who knows, but if your application is simple, this is good value for $14. One last thing, the AC power and Relay Output are awkwardly up-side down. Normally, I see main power at the bottom and output at the top. In this case, the AC power on the timer is at the top and output is at the bottom, where on the power supply, power is on the bottom and output is on the top. Without spending more money on terminal blocks, it makes wiring a bit messy.

Excellent value, very easy to program, works perfectly

Easy to program, easy wiring.

Excelente producto, muy práctico y fácil de programar, cumple todas mis expectativas

This timer is exactly what I needed to turn on security light, only one so far. I needed a timer to control when the light comes on and when it turns off again. This timer does it very well. I've set it up so it turns the light on at a preset time (1:30AM) and stays on until 6:30AM, then it shuts off. I don't need it to be on anytime before that, but it does the job of supplying enough light to reset my security cameras to full color mode instead of the normally fuzzy black-and-white night vision they provide. While its on it is very clear, just what I need. Perfect little timer, next project is to operate the relay for my pool pump.

I purchased this timer to install into our cnc horizontal mill at work. It has a “wake up” function that needed a contact closure. This device fit the bill. Now the mill wakes up and runs it’s warm up cycle before the shop doors open. It’s ready to run parts as soon as the lights come on.

After 2 months its still working. Good quality product. Designed for din rail to mount.

Excellent design. Easy to read and implement the printed directions. Off-Timed-On switch is a good design that eliminated a switch I was going to add anyway. Changing timing functions on the fly is very straightforward and easy. Well worth the purchase price.

actually works! as advertized

Worked as advertised. Easy to use

did exactly what its supposed to do and im happy with that