A solid state relay (SSR) is an electronic switching device that switches on or off when a small external voltage is applied across its control terminals. SSRs are similar to traditional mechanical relays in that they control electrical loads by switching electrical circuits. However, SSRs have no moving parts and are therefore much more rugged and reliable than mechanical relays. Like all electronic devices, SSRs can fail. However, unlike mechanical relays, SSRs can fail in either the open or closed position. If an SSR fails in the open position, the load will be turned off
Solid state relays can switch both DC and AC currents. When used to switch DC currents, the relay creates a small voltage drop across its terminals. This voltage drop is typically less than 1 volt.
Solid-state relays are capable of switching AC by using a silicon controlled rectifier (SCR) as the main switching element. The SCR is turned on by a low-voltage DC control signal that is applied to the gate of the SCR. When the SCR is turned on, it allows current to flow through the relay, which in turn switches the AC load.
Yes, we can use SSR for motor but it is not recommended because it can cause damage to the motor.
5/5
Heat sink provides long lasting usage, it will help dissipate the heat and protect your relay.
Product name: aluminum heat sink.
Package include: 5x solid state relay heat sink, 10x screws. Note: the solid state relay is not included.
Easy installation: need to be evenly coated with thermal grease between the solid state relay and the heat sink.
Material: aluminum; Fit for: solid state relay SSR-10A,25A,40A.
$234
I've been pondering whether the cheap, high-power SSRs that are available on Amazon have genuinely negative reviews or are just not being heat-sinked adequately. I've made a few purchases and have never experienced any issues, but my sample size is too tiny to be considered representative. These become HOT while under stress, thus you must adequately heatsink them (I recommend a decent quality thermal paste as well).and as a result, this item.So I attached this to a 40A SSR that typically handles an 8–9A load. I tested the SSR without a heatsink first to check if I truly required one before attaching it. The response is a resounding "YES." The SSR overheats and fails early as a result.The SSR stays cool enough to handle after I added this heatsink (with a thorough, but very thin coat of excellent thermal paste). Although it's too soon to say if it will last a long time, this heatsink is functioning properly in my application. I should point you that although though the SSR usually resides in an enclosure, the heatsink protrudes. Airflow is not too constrained, but there is no active cooling.Although there is only one SSR cover, I really enjoy it. I wish there were *5* covers, much like there are heatsinks. This is only a desire; the description does make that clear.Because these are somewhat expensive for what they are, I took away a star. They add some complexity to installing the SSR, which is both a bonus and a drawback given that the heatsink is large. Airflow also needs to be taken into account. It might be improved. If I see one better, I'll let you know! Save your SSRs until then by heatsinking them! This decision suits my needs.
4.9/5
Mount Hole Diameter : 6.5mm/ 0.26"; Mount Hole Distance : 80mm/ 3.15"
Max. Average Forward Rectified Current : 200A
Dimension: 95 x 75 x 40mm/ 3.7" x 3" x 1.6" (L*W*T); Mounted Hole Dia.: 5mm / 0.2"
Repetitive Peak Reverse Voltage : 1600V; Phase : Single Phase;Terminals : 4
Net weight: 410g
$234
Great results! I recently switched my ac welder to dc in order to meet demand without overheating it, and it has shown to be effective. My newly converted welder was used at its maximum amperage, and it remained comfortably cool. Since the difference between it and the 150 amp unit wasn't all that great, why not err on the side of caution and not overwork your most crucial component? I would advise anyone who wants to turn their metal glue gun into a true working welder that will perform much better to do this. Although I was hesitant to make the conversion, I'm pleased I did because it didn't need brain surgery and the cost was well worth the effort. The rectifier you require is this one.
4.4/5
Transparent resin protective cap is included.
Output requirements concatenated fuse or and the varistor.
10 to 25A radiator cooling,more than 25A must on the radiator and fan cooling.
Perfectly soldered copper post.
Sealed high temperature resistance housing.
$234
After converting my 3D printer heated bed to a 120 volt A.C. bed, I utilised this and it worked great.The input of this relay is now driven by the 12 volt switching circuit from the mosfet that powered my old bed. Relay output changes the old, lower wattage heated bed to the new, higher wattage heated bed.I utilised the appropriate Molex connectors, which can handle the greater current of the new heated bed, to 3D print an enclosure.It works great, and Uxcell appears to be a respectable supplier of electronic components. I've bought three parts from them, and each one has been of excellent quality.
4.2/5
Product name: solid state module relay SSR-10DA, 3-32VDC/24-380VAC.
Solid state relay ideal for automatic process control application, a must component for temperature controller and other machinery control system.
SSR Application: with a switch no spark, no noise,high switching speed,anti-corrosion,moisture-proof,anti-vibration,long life.high reliability,electromagnetic compatibility and other characteristics.
Especially suitable for corrosion, moisture, dust, and other harsh environments, and frequent switching the occasion, AC contactor is updated alternative.
High reliabily, compact size, a great part for temperature controller and other machinery control system.
$234
Works perfectly with the 500 watt, 110 volt silicone heated mat I purchased for my 3D printer's 1/4" aluminium plate.
3.8/5
Net Weight : 116g;Package Content : 1 x Solid State Relay
Product Name : Solid State Relay;Model No. : BEM-14840DA
Total Size (Approx.) : 58 x 45 x 32mm / 2.3" x 1.8" x 1.26" (L*W*T);Material : Metal, Plastic, Electronic Parts
Current & Frequency : 40A, 50/60Hz;Output Voltage : 24-480VAC
Control Voltage : 3-32VDC;Mounting Hole Diameter : 4.5mm / 0.18"
$234
I'm now switching the anti-sweat heaters in a walk-in cooler with the 40 amp version (a load of roughly 20 amps @ 115 volts). It may be on or off all day long, or it might alternate between the two states multiple times per minute depending on the ambient humidity detected by a controller. So far, it has performed this 24/7/365 without any problems.Given the pricing, I'm rather impressed. Compared to replacing the entire controller, was far less expensive when the original electromechanical relay smoked itself.It's important to keep in mind that these solid state relays grow hot. Make sure to cool properly.The heatsink attached to it becomes extremely warm even when it is placed in a 40 F cooler.With loads under a couple amps, skipping the heatsink would probably be acceptable (depending on voltage, of course). After an hour, a 60 watt light bulb ran through it without producing any heat that could be felt.Upon receiving it, I peered inside. Between the screw terminals and the TRIAC, there are large solder-coated traces (a BTA41). Between the AC and DC sides are slots for optoisolators and anti tracking devices. The PCB's insulating covering is, however, incredibly thin.Although I'm not an electrical engineer, the build appears to be adequate.good as much more expensive units? Nah. sufficient for me Sure.And that might be sufficient for you as well.
3.5/5
Net Weight : 116g;Package Content : 1 x Solid State Relay
Product Name : Solid State Relay;Model No. : BEM-14840DA
Total Size (Approx.) : 58 x 45 x 32mm / 2.3" x 1.8" x 1.26" (L*W*T);Material : Metal, Plastic, Electronic Parts
Current & Frequency : 40A, 50/60Hz;Output Voltage : 24-480VAC
Control Voltage : 3-32VDC;Mounting Hole Diameter : 4.5mm / 0.18"
$234
It is being used to power a 3 A/120V circuit for a tiny sump pump controlled by an Arduino board and water sensor; the heat sink is provided, but there is no compound; I bought some and added it just to be safe. It is powering a pump with a 1-minute duty cycle to remove a small amount of water seepage from beneath my basement floor. It has been running on and off for three days with no issues, and it is turned on and off by an Arduino logic-level votage without any power conditioning. (I changed a mechanical relay that after a few months of occasional use was stuck in the "on" position.)
3.3/5
Material: plastic and metal.
Package Content : 2 x Solid State Relay .(Please note that there are 2pcs included.Because of the wrong package, many customers have received just 1 pc, we have confirmed and disposed all wrong items. Please do not worry about the quantity now)
Rated Load Current : 40A; Input : DC 3-32V; Output : DC 24-220V.
Model: SSR-40DD.
If you have any problems, please feel free to contact us from Monday-Friday.
$234
For my application, which involves running a small 12 VDC pump with a high duty cycle, these solid state relays are excellent. I'm not using a heat sink right now because I'm only switching 4.8 amps, but it does get a little warm after operating for approximately half an hour. Add a heat sink if you have the space to do so. Reverse the output polarity if your device starts up and won't shut down.
Most solid state relays do not make an audible clicking noise when they are turned on or off. However, some types of solid state relays may make a slight clicking noise when they are switched on or off.
Solid state relays are silent devices. There is no sound when they are switched on or off.
Solid-state relays are devices that use semiconductor switching elements, such as thyristors, to control the conduction of electricity between two electrodes. The control electrode is usually called the gate, while the main electrodes are called the anode and the cathode. Solid-state relays do not require a resistor in order to function. However, if the load that the relay is controlling is inductive, such as a motor, then a resistor may be needed in order to snub out any inductive spikes that could damage the semiconductor switching elements.
A solid state relay (SSR) is an electronic switching device that switches on or off in response to an external control signal. The control signal can be DC or AC. SSRs are much faster than mechanical relays and can switch loads in microseconds.
Solid state relays are known for their long life span in comparison to other types of relays. They can last for decades if used within their specified operating conditions.
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