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uxcell BEM-14840DA 3-32V DC to 24-480V AC 40A Output Single Phase SSR Solid State Relay

4.5 4.5 out of 5 stars 203 ratings

Currently unavailable.
We don't know when or if this item will be back in stock.
Current Rating 40 Amps
Brand uxcell
Contact Current Rating 40 Amps
Maximum Switching Current 40 Amps

About this item

  • Product Name: Solid State Relay; Model No. : BEM-14840DA
  • Current & Frequency : 40A, 50/60Hz; Output Voltage : 24-480VAC
  • Control Voltage : 3-32VDC; Mounting Hole Diameter : 4.5mm / 0.18"
  • Total Size (Approx.) : 58 x 45 x 32mm / 2.3" x 1.8" x 1.26" (L*W*T)
  • Net Weight : 116g; Package Content : 1 x Solid State Relay
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uxcell BEM-14840DA 3-32V DC to 24-480V AC 40A Output Single Phase SSR Solid State Relay

uxcell BEM-14840DA 3-32V DC to 24-480V AC 40A Output Single Phase SSR Solid State Relay


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Product Description

Model No. : BEM-14840DA
Current : 40A
Frequency : 50/60Hz
Output Voltage : 24-480VAC
Input Control Voltage : 3-32V DC
Single Phase Solid State Relay with LED indicator.
It is a must component for temperature controller, heater, small oven and more.

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uxcell BEM-14840DA 3-32V DC to 24-480V AC 40A Output Single Phase SSR Solid State Relay
uxcell BEM-14840DA 3-32V DC to 24-480V AC 40A Output Single Phase SSR Solid State Relay
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PriceCurrently unavailable.$12.99$10.90$11.49$17.59$12.29
Delivery
Get it as soon as Wednesday, May 15
Get it as soon as Wednesday, May 15
Get it as soon as Wednesday, May 15
Get it as soon as Friday, May 17
Get it as soon as Wednesday, May 15
Customer Ratings
Sold By
uxcell
CGELE Official Store
uxcell
uxcell
LERWAY Tech.
contact type
Normally Open
Normally Open
Normally Open
Normally Open
max switch current
40 amps
40 amps
40 amps
25 amps
40 amps
specification met
Ma
Electromagnetic Compatibility
Ma

Customer reviews

4.5 out of 5 stars
4.5 out of 5
203 global ratings

Customers say

Customers like the performance and value of the relay. For example, they mention it works well, is good value for money and that it works great to power a 3D printer's heated bed. Opinions are mixed on quality and temperature control.

AI-generated from the text of customer reviews

24 customers mention18 positive6 negative

Customers like the performance of the relay. They say it works perfectly, it works great to power their 3D printer's heated bed, and has no problems thus far. Some say that it turns on fine and glows dimly instead of turning off completely.

"Works well with my custom FIBERGLASS URETHANE FOAM BED 600x600 800 Watt HEATED BED!..." Read more

"Glad we switched to these relays, never had issues with them. Handle load like champ...." Read more

"Completely Died in less than 2 months. And started intermittent operation after just a few weeks...." Read more

"...a heat sink with thermal grease and a fan, and these have had no issues staying on for 30 minutes at full power, then pulsing with a raspberry pi..." Read more

8 customers mention6 positive2 negative

Customers like the value of the relay. They say it does what it's supposed to do at a good price.

"...Quite impressed, given the price...." Read more

"...Good price-quality value" Read more

"One of these is working ok... one is bad right out of the box... im 31 days so no refund for me :..." Read more

"...but as this unit is so inexpensive compared to the Auber, it is possible to get a much higher rated..." Read more

3 customers mention3 positive0 negative

Customers find the installation of the relay to be easy and smooth.

"...It went smoothly...." Read more

"I like the product because it was easy to install and did perform as listed without issue." Read more

"...Driving it directly from a GPIO output pin with no problem. Very easy setup." Read more

9 customers mention6 positive3 negative

Customers are mixed about the quality of the relay. Some mention it's decent, well made, and a great product, while others say that it'll not be reliable enough for high on/off usage, it doesn't last long, and failed instantly.

"Decent quality" Read more

"...Not reliable enough for high on/off usage." Read more

"Good quality" Read more

"Great customer service and product is great!Thank you" Read more

8 customers mention4 positive4 negative

Customers are mixed about the temperature control of the relay. Some mention that it responds very quickly and never seems to get too hot, while others say that it requires a heat sink and that the pid temp sensor started freaking out.

"...This responds very quickly and never seems to get too hot...." Read more

"...One thing to note about these solid state relays, they get HOT. Be sure to use proper cooling...." Read more

"...NOW it gets nice and hot, while the SSR doesn't get hot at all..." Read more

"...Just be sure to install the correct sized heat sink, it will get very hot..." Read more

HEATED BED ACTIVATED!
5 Stars
HEATED BED ACTIVATED!
Works well with my custom FIBERGLASS URETHANE FOAM BED 600x600 800 Watt HEATED BED! (Low watt to avoid serious warping, just takes A LOT longer to reach 120, but worth the wait (Using 3.175 GLASS ATOP .090 6061-T6 ALUMINUM LARGE 51MM METAL CLIPS) & CUSTOM ACETONE SMOOTHED ABS KNOBS :).At first the FUSE was blowing every time I activated my HEATED BED. Thought it was SSR, but realized after reading about some one else having the same issue - they used an CAR FUSE and that resolved their issue.I was using a 5x20 3Amp fuse in my PSU, this could not handle the load. So upon inquiring with an electrician about my 800 Watt load, replaced the fuse with 5x20 12Amp VIOLA!NOW it gets nice and hot, while the SSR doesn't get hot at all (Installed a 40mm fan that isn't needed - hmm maybe it will warm up after a 3Day print job?).I am posting a simple diagram, to help you - as I have installed and use my SSR+HEATED BED. (SWITCH -W- FUSE is used, not shown in diagram, connected to the same mains lines on PSU as BED & SSR).LEGAL DISCLAIMER:i take no responsibility or liability in your use and installation of your SSR. Merely posting diagram as I have installed.YOU accept full responsibility and liability, with full knowledge 120Volts can cause serious injury and or death. USE CAUTION! Employ an electrician for installation if required.
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Top reviews from the United States

Reviewed in the United States on September 20, 2023
This was needed to provide 120 power to my Creality CR10 S4 upgraded heated bed. This responds very quickly and never seems to get too hot. I highly recommend upgrading the heated bed if you have one of these large 3D printers it saves tons of time and prints!!
Reviewed in the United States on January 15, 2021
Works well with my custom FIBERGLASS URETHANE FOAM BED 600x600 800 Watt HEATED BED! (Low watt to avoid serious warping, just takes A LOT longer to reach 120, but worth the wait (Using 3.175 GLASS ATOP .090 6061-T6 ALUMINUM LARGE 51MM METAL CLIPS) & CUSTOM ACETONE SMOOTHED ABS KNOBS :).

At first the FUSE was blowing every time I activated my HEATED BED. Thought it was SSR, but realized after reading about some one else having the same issue - they used an CAR FUSE and that resolved their issue.

I was using a 5x20 3Amp fuse in my PSU, this could not handle the load. So upon inquiring with an electrician about my 800 Watt load, replaced the fuse with 5x20 12Amp VIOLA!

NOW it gets nice and hot, while the SSR doesn't get hot at all (Installed a 40mm fan that isn't needed - hmm maybe it will warm up after a 3Day print job?).

I am posting a simple diagram, to help you - as I have installed and use my SSR+HEATED BED. (SWITCH -W- FUSE is used, not shown in diagram, connected to the same mains lines on PSU as BED & SSR).

LEGAL DISCLAIMER:
i take no responsibility or liability in your use and installation of your SSR. Merely posting diagram as I have installed.
YOU accept full responsibility and liability, with full knowledge 120Volts can cause serious injury and or death. USE CAUTION! Employ an electrician for installation if required.
Customer image
5.0 out of 5 stars HEATED BED ACTIVATED!
Reviewed in the United States on January 15, 2021
Works well with my custom FIBERGLASS URETHANE FOAM BED 600x600 800 Watt HEATED BED! (Low watt to avoid serious warping, just takes A LOT longer to reach 120, but worth the wait (Using 3.175 GLASS ATOP .090 6061-T6 ALUMINUM LARGE 51MM METAL CLIPS) & CUSTOM ACETONE SMOOTHED ABS KNOBS :).

At first the FUSE was blowing every time I activated my HEATED BED. Thought it was SSR, but realized after reading about some one else having the same issue - they used an CAR FUSE and that resolved their issue.

I was using a 5x20 3Amp fuse in my PSU, this could not handle the load. So upon inquiring with an electrician about my 800 Watt load, replaced the fuse with 5x20 12Amp VIOLA!

NOW it gets nice and hot, while the SSR doesn't get hot at all (Installed a 40mm fan that isn't needed - hmm maybe it will warm up after a 3Day print job?).

I am posting a simple diagram, to help you - as I have installed and use my SSR+HEATED BED. (SWITCH -W- FUSE is used, not shown in diagram, connected to the same mains lines on PSU as BED & SSR).

LEGAL DISCLAIMER:
i take no responsibility or liability in your use and installation of your SSR. Merely posting diagram as I have installed.
YOU accept full responsibility and liability, with full knowledge 120Volts can cause serious injury and or death. USE CAUTION! Employ an electrician for installation if required.
Images in this review
Customer image Customer image Customer image
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One person found this helpful
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Reviewed in the United States on June 14, 2020
Using this to control an electric water heater using a NodeMCU flashed with ESP Home. It is triggering using 3.3V without issue. I did attach the SSR to a large heatsink that was originally used for an AMD Athlon 64 and I believe it was rated at around 90 watts heat dissipation so probably a lot more than many of the heatsinks marketed towards these relays. This has been up and running for about a week now and I am very happy with it. I am on an adjustable rate power plan and can automatically turn the water heater off during the hours where the rate jumps up and don't need it on at night either. I would say that the water heater is powered about 6 hours in the morning to early afternoon and about 4 hours in the evening and then is shut off overnight.

The breaker for the water heater I have is a dual pole rated at 30 amps and the element is rated at 3500 watts so probably runs around 15 amps load which is easily handled by this relay with the heatsink I have in place.
2 people found this helpful
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Reviewed in the United States on May 5, 2017
I am using one of these to control a pipe organ blower which draws about 4.5 Amps, and have not needed any heat sink except for the aluminum enclosure it is mounted in.

Although this item has the CE mark from the manufacturer, which means it should meet all EU safety requirements, I would prefer if it had also been tested by an independent lab such as UL, ETL, or TÜV.
One person found this helpful
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Reviewed in the United States on November 13, 2018
I currently have the 40 amp version in service switching the anti sweat heaters in a walk-in cooler (a load of about 20 amps @ 115 volts). Depending on ambient humidity sensed by a controller it may spend all day on, off, or oscillate between the two states several times a minute. So far it has done so without issue, 24/7 365.

Quite impressed, given the price. Was much cheaper than replacing the whole controller after the original electromechanical relay smoked itself.

One thing to note about these solid state relays, they get HOT. Be sure to use proper cooling.
Even sitting in a 40 F cooler the heatsink attached to it gets very warm.
It would probably be fine to forgo the heatsink with loads under a couple amps (depending on voltage, of course). Running a 60 watt light bulb through it produced no noticeable heat after an hour.

Took a peak inside when I got it. Big solder coated traces between the screw terminals and the TRIAC (a BTA41). Opto-isolator and anti tracking slots between the AC and DC sides. Insulative coating on the PCB is very thin though.
I'm not an electrical engineer, but it looks to be of OK construction.
Good as much higher priced units? Nah. Good enough for me? Sure.
And that might good enough for you, too.
5 people found this helpful
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Reviewed in the United States on September 2, 2022
Glad we switched to these relays, never had issues with them. Handle load like champ. Can operate from 3v what you can get from low voltage IoT units like esp32.
I didn’t get in details, but I assume it has semistor that require minimum load on the high side to open properly, that’s why my low voltage motor didn’t work.
Good price-quality value
One person found this helpful
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Reviewed in the United States on July 12, 2016
I bought this to replace a blown 25A Auber SSR for my brewing setup. It was my fault that the Auber blew (didn't install a fuse in the setup and a switch arced and failed, now there is one), but as this unit is so inexpensive compared to the Auber, it is possible to get a much higher rated one which means it probably won't blow even if something else does go wrong. For the price, it's an easy decision. Just be sure to install the correct sized heat sink, it will get very hot (I use the heat form the heat sink to warm up my yeast starter for pitching).
3 people found this helpful
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Top reviews from other countries

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RL
5.0 out of 5 stars Flawless Performance under a PID Temperature Control
Reviewed in Canada on November 1, 2020
Bought it to replace the SSR in my Profitec Pro 500 PID espresso machine. The original SRR in the machine was a smaller one yet adequate in current rating, however its installation had a marginal heat dissipating capability causing the SSR to go into thermal protection, in other words stop working, frequently after 2 years in service. After installing the replacement with a home brew heatsink, the machine has been left power-on all day long for two weeks and never missed a beat. For those who wonder if this SSR would work well with a PID temperature control unit, my experience appears to be a positive reassurance. By the way, in my application the device the SSR supplies power to is a 1.4Kw heater element operating on 120VAC.
3 people found this helpful
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Dokdude
5.0 out of 5 stars Ottimo
Reviewed in Italy on September 23, 2017
Utilizzato per controllare la pompa di una autoclave da 1,5hp tramite Arduino (5V). Il relè elettromeccanico restava incollato ogni 50 cicli, questo non fa una piega ed è silenzioso. Prodotto perfetto.
One person found this helpful
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Ax
5.0 out of 5 stars ... do what they are supposed to do and much better than the cheap Fotek SSRs
Reviewed in the United Kingdom on June 22, 2017
They do what they are supposed to do and much better than the cheap Fotek SSRs. Using these on 3D Printers for switching power on and off and controlling mains voltage heaters.
killokillo
5.0 out of 5 stars rele estado solido
Reviewed in Spain on September 16, 2016
cumple con su cometido, si trabaja con mucha carga es ideal ponerle un disipador, yo tenia uno y se lo puse
miljbee
4.0 out of 5 stars Facile
Reviewed in France on August 8, 2016
Je ne lui ai pas mis 5 étoiles car il n'est indiqué nul part que la sortie pouvait être en courant continu ... pour le reste rien de spécial à ajouter. C'est un produit simple qui fait ce qu'on attend. J'y ai connecté une source 32V continue et du 3v continue en sortie. ça marche impec.
One person found this helpful
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