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Heschen Single Phase DC/AC Solid State Relay, SSR-40DA, Input 4-32VDC, Output 24-480VAC, 40A 50-60Hz (1)

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498 ratings

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Item Package Quantity: 1

Size Name: SSR-40DA DC/AC

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Purchase options and add-ons

Connector type	Screw
Contact material	Copper
Contact type	Normally Closed
Current rating	40 Amps
Mounting type	Screw Mount

About this item

Load Current: 40A, 50-60Hz
Load Voltage: 24-480VAC
Control Voltage: 4-32VDC
LED Working Instructions
CE Listed

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This item: Heschen Single Phase DC/AC Solid State Relay, SSR-40DA, Input 4-32VDC, Output 24-480VAC, 40A 50-60Hz (1)

£9.49

Get it as soon as Friday, Oct 31

Only 10 left in stock.

Sold by Heschen and sent from Amazon Fulfillment.

QWORK® Aluminum SSR Heatsink , Heat Sink Radiator for Cooling 10-40A Solid State Relays , 2Pcs

£14.29

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In stock

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diymore Solid State Relay Module 40A SSR-40DA DC-AC,Input 3-32VDC,Output 24-380VAC

£6.59

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Product Information

Technical Details

Manufacturer	‎Shanghai Kunerjing Current Rectifier Co.Ltd
Part number	‎SSR-40DA
Item Weight	‎110 g
Product Dimensions	‎4.4 x 3.2 x 5.8 cm; 110 g
Item model number	‎SSR-40DA
Size	‎SSR-40DA DC/AC
Colour	‎Black
Wattage	‎1 watts
Item Package Quantity	‎1
Measurement System	‎Wire Size
Plug profile	‎Screw Mount
Specification met	‎CE
Batteries included?	‎No
Batteries Required?	‎No

Additional Information

ASIN	B071HP9NJD
Customer Reviews	498 ratings 4.1 out of 5 stars
Best Sellers Rank	40,010 in Business, Industry & Science (See Top 100 in Business, Industry & Science) 26 in Solid State Relays
Date First Available	10 May 2017

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Product Description

Wiring Diagram

	Heschen Single Phase DC/DC Solid State Relay, SSR-40DD	Heschen Single Phase DC/AC Solid State Relay, SSR-50DA	Heschen Single Phase DC/AC Solid State Relay, SSR-60DA	Heschen Single Phase DC/AC Solid State Relay, SSR-80DA	Heschen Single Phase DC/AC Solid State Relay, SSR-100DA	Heschen Single Phase DC/AC Solid State Relay, SSR-120DA

Customer Reviews	498	3	31	3	3	—
Price	£10.69	£9.99	£11.29	£12.49	£13.49	£13.69
Model:	SSR-40DD	SSR-50DA	SSR-60DA	SSR-80DA	SSR-100DA	SSR-120DA
Load Current:	40A	50A	60A	80A	100A	120A
Input:	4-32VDC	4-32VDC	4-32VDC	4-32VDC	4-32VDC	4-32VDC
Output:	24-220VDC	24-480VAC	24-480VAC	24-480VAC	24-480VAC	24-480VAC

Customer reviews

498 global ratings

How customer reviews and ratings work

Customers say

Customers report mixed experiences with the relay's functionality, with some saying it works great while others report it doesn't work at all. The quality receives mixed feedback, with some praising its construction while others point out poor quality control. The switching capability is positive, with one customer noting its effectiveness for 3D printer heated bed control. However, durability is a concern, with one customer reporting that it melted during use.

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Switching capability Functionality Quality Durability

4 customers mention ‘Switching capability’3 positive1 negative

Customers appreciate the relay's switching capability, with one mentioning its effectiveness in controlling 3D printer heated beds.

"This looked ideal for the application switching: 120v 16A DC (with 12v 'coil' voltage) vs 24-220V, 40A DC advertised...." Read more

"Very effective switching capability...." Read more

"...to switch off completely and then pulsed on and off, only switching 500ma at 240 volts." Read more

"Switching 3D printer heated bed..." Read more

17 customers mention ‘Functionality’8 positive9 negative

Customers have mixed experiences with the relay's functionality, with some reporting it works great while others mention it doesn't work at all.

"Did not work. Buyer refunded the price." Read more

"...that, for motor control the application I am using it in it's fine, does the job and is easy to interface to driver electronics." Read more

"Defective - didn't work - poor quality control - sent back for refund." Read more

"Bit big but works as it should." Read more

9 customers mention ‘Quality’4 positive5 negative

Customers have mixed opinions about the quality of the relay, with some finding it good while others report poor quality control.

"I would seriously think twice about buying this cheap SSR, I had this installed in my 3d printer thinking it was working fine drove me mad trying to..." Read more

"Perfect replacement for my solid state relay in the cr10s pro 3d printer. Direct replacement." Read more

"Defective - didn't work - poor quality control - sent back for refund." Read more

"Good quality item" Read more

4 customers mention ‘Durability’1 positive3 negative

Customers report issues with the relay's durability, with individual units melting, blowing up, and failing within a couple of months of use.

"Usless didn't last above a couple of months. Running a resistive load of around 20 amp and now failed to closed circuit heater on continuously." Read more

"...The indicator didn't light and it destroyed the driver circuit. It turned out all four screw terminals were shorted to the heatsink...." Read more

"Melted on first use !..." Read more

"...resistance when actuated - and sure enough it got very hot and started to melt - returned - and with this experience DO NOT BUY !" Read more

Top reviews from United Kingdom

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feygor
Works as advertised
Reviewed in the United Kingdom on 12 August 2020
Item Package Quantity: 1Size Name: SSR-40DA DC/ACVerified Purchase

Appears to work fine, the relay was activated with a voltage between 2.5-5v DC, though it's obviously rated much higher.
Only used it to switch 220v at 3A AC, can't comment on higher currents but it seems well built and works as advertised

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subarusam
Very effective switching capability.
Reviewed in the United Kingdom on 11 November 2019
Item Package Quantity: 1Size Name: SSR-40DD DC/DCVerified Purchase
Needed a relay to handle 130vdc switching for my electric car conversion triggered from 12vdc supply, this works brilliantly. So far working really well, am considering replacing other high load mechanical relays with similar SSR’s, will update later when used for a while to give overall feedback.

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Naz
POOR QUALITY!!!... LOOK FOR ALTERNATIVE.
Reviewed in the United Kingdom on 1 September 2020
Item Package Quantity: 1Size Name: SSR-40DA DC/ACVerified Purchase
I would seriously think twice about buying this cheap SSR, I had this installed in my 3d printer thinking it was working fine drove me mad trying to diagnose problem figured out eventually SSR was faulty and not doing its job although indicator light lit up making me think it was working fine, I'm pretty sure people who are rating this as a 4/5 star don't even know this is not working as the job for this SSR is to protect your rig from shorting, I think what this SSR does is allow current to run through but somewhere its not protecting the way it should and sends off all sorts of errors in some cases I can't put my finger on it as I'm not an engineer in this field, I basically ending up buying a premium SSR which worked straight away and got rid of all my headaches, I would look for a better alternative or if you can spend a bit more get a reliable/quality product.

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4 people found this helpful

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Technobabble
Watch out for the leakage when in the off state in your usage designs
Reviewed in the United Kingdom on 13 July 2023
Item Package Quantity: 1Size Name: SSR-40DD DC/DCVerified Purchase
If you intend to use this device as a replacement for old style mechanical switch relays be aware that this device has a leakage when in the off state, so you can't rely on it as a total safety isolation device. Having said that, for motor control the application I am using it in it's fine, does the job and is easy to interface to driver electronics.

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Mr David A Wild
Works well on my 3D printer
Reviewed in the United Kingdom on 11 September 2019
Item Package Quantity: 1Size Name: SSR-40DD DC/DCVerified Purchase
Used on my 3D printer and stays at low temperature, unlike others I have used. It says 24 volt min but I use it at 12 volt.

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Alex Cary
Direct replacement for cr10s pro 3d printer.
Reviewed in the United Kingdom on 10 August 2020
Item Package Quantity: 1Size Name: SSR-40DD DC/DCVerified Purchase
Perfect replacement for my solid state relay in the cr10s pro 3d printer. Direct replacement.

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One person found this helpful

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Mr. Laszlo Keszthelyi
very fast delivery and good quality.
Reviewed in the United Kingdom on 12 October 2018
Item Package Quantity: 1Size Name: SSR-40DA DC/ACVerified Purchase
Amazed the quality and the price so mutch. Cant say China just only make things to quantity.

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SimonR
Very poor quality - some of them are DANGEROUS!
Reviewed in the United Kingdom on 23 September 2022
Item Package Quantity: 1Size Name: SSR-40DD DC/DCVerified Purchase
I took delivery of two. Both were being used at 110V DC, switching 20A. (well within ratings).

The first one was just closed circuit (the power switching inputs shorted). The indicator didn't light and it destroyed the driver circuit. It turned out all four screw terminals were shorted to the heatsink.

Re-build driver (with fuses) and tried the second one. At first it appeared to work - the indicator turned on and the switching circuit closed. Unfortunately when the driver tried to turn it off, it literally blew itself to bits!

The metal plate on the back detached with half the transistor attached. Smoke coming out of the other bit.

I've since replaced them with a pair of Futek SSR-40DD SSRs which work just fine.

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Top reviews from other countries

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René D
Matériel qui fonctionne bien.
Reviewed in Belgium on 3 April 2025
Item Package Quantity: 1Size Name: SSR-40DA DC/ACVerified Purchase

Bonjour. Matériel impeccable avec plan de raccordement clair et précis.

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Giuseppe
ottimo
Reviewed in Italy on 18 February 2024
Item Package Quantity: 1Size Name: SSR-40DA DC/ACVerified Purchase
funziona

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Jose
Funciona
Reviewed in Spain on 8 July 2025
Item Package Quantity: 1Size Name: SSR-40DD DC/DCVerified Purchase
DC/DC bien.

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Dopelkorn
Nie odcina przepływu prądu całkowicie
Reviewed in Poland on 16 October 2023
Item Package Quantity: 1Size Name: SSR-40DA DC/ACVerified Purchase
W stanie wyłączonym przepuszcza aż około 100v z 230v więc ciężko to nazwać rozłączeniem obwodu. Żarówka świeci nadal tylko mniejszym światłem, świetlówka LED miga. Bez sensu.

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Amazon カスタマー
ON-OFFを頻繁に繰り返す設備の接点式リレーの入れ替えには最適。
Reviewed in Japan on 20 January 2025
Item Package Quantity: 1Size Name: SSR-40DA DC/ACVerified Purchase
自作の防獣対策高圧発生機の出力リレーをこのソリッドステートリレーに置き換えたら故障がなくなりました。 ICの出力で ON-OFFできるので IC1個リレートランスで完成１秒サイクルの出力などは最適です。

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Heschen Single Phase DC/AC Solid State Relay, SSR-40DA, Input 4-32VDC, Output 24-480VAC, 40A 50-60Hz (1)

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From the brand

Household AC Contactor

Surge Protective Device

Changeover Switch

MCCB

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通用继电器

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Product Description

Wiring Diagram

Customer reviews

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Top reviews from United Kingdom

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Top reviews from other countries

5.0 out of 5 stars Matériel qui fonctionne bien.

5.0 out of 5 stars ottimo

5.0 out of 5 stars Funciona

1.0 out of 5 stars Nie odcina przepływu prądu całkowicie

5.0 out of 5 stars ON-OFFを頻繁に 繰り返す設備の 接点式リレーの入れ替えには最適。

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Product Summary: Heschen Single Phase DC/AC Solid State Relay, SSR-40DA, Input 4-32VDC, Output 24-480VAC, 40A 50-60Hz (1)

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Matériel qui fonctionne bien.

ottimo

Funciona

Nie odcina przepływu prądu całkowicie

ON-OFFを頻繁に繰り返す設備の接点式リレーの入れ替えには最適。

Product summary presents key product information

Keyboard shortcut shift + ALT + opt + D