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D-74 Solid State Relay heatsink heat sink with DIN Rail Mounting

Solid State Relay heat sink

D-74 heatsink heat sink with DIN Rail Mounting Base for Single Phase Solid State Relay

Product Description


Heatsinks are designed to remove heat generated during operation of semiconductor devices, in this case, the solid-state relay.

Heatsinks must be used under constant load over 5A. Otherwise, overheating will make the possible failure of SSR. Stated nominal current relays is capable of switching at a temperature not exceeding 40 ° C. With increasing temperature, decreasing its relay throughput rate of 20-25% per 10 ° C. At temperatures ≈80ºC its current capacity is reduced to zero and as a consequence the failure. To avoid overheating of the relay, it is necessary to install the cooling radiator.


In the selection of heatsinks to consider the factors influencing the cooling, such as the place of installation, ambient temperature, air circulation, the load on the solid-state relay. In some cases, for more efficient cooling (high air temperature, installation relay in a closed cabinet and so on), have to use a larger heat sink and install a fan to force the removal of heat.


Heatsinks should be installed vertically so that nothing prevented the natural circulation of air along the heatsink. Use of thermal conductive paste enhances heat transfer from the relay on the heatsink, but with the proviso that it is applied very thin (tens of microns) to fill cracks and clearances.

Technical specifications:

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** = with fan

The load current is for T <40 °C. At T> 40 °C and / or installation of the relay in the closet to choose the heat sink for the load current increased 1.5-2 times, and use a fan.

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D-74 heatsink heat sink with DIN Rail Mounting Base for Single Phase Solid State Relay D-74 heatsink heat sink with DIN Rail Mounting Base for Single Phase Solid State Relay D-74 heatsink heat sink with DIN Rail Mounting Base for Single Phase Solid State Relay






Q:How to order our product ? 

A:1).Please tell us the model and quantity and other request you need. 

   2).We make the PI for you.

   3).After you confirm the PI, we arrange the order for you after receiving your payment.

   4).After the goods finished, we send the goods out to you and tell you the tracking number.

   5).We will track your goods until you receive the goods. 

Q:  What's your warranty ?

A: 1-2 years

Q: What's your contact information:

A: Our address: Liushi town, Zhejiang province, China. 

Q: What's your shipment method?

A: We ship by Express, by air, by sea, by train. Normally we checked and compare, then provide

customer the most proper shipment method.

Q: What's about MOQ?

A: First order MOQ=1pcs

Q: If i want to release order, what's the payment method you accept ?

A: We accept T/T, Paypal, Western union, L/C,etc.

Q: If i want to release order, what's the process?

A: Thanks. You can send inquiry to us by alibaba, or send us by email, we will reply within 24hrs.

Our Services

1. Your inquiry will be replied within 18 hours.
2. We offer you professional service in fluent English.
3. Keep the mass production as the sample in high quality.
4. Freight forwarder: faster,safer, and convenient.
5. Quality: we have QC on each process.

Packaging & Shipping

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Company Information

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Contact us

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ADD:NO .18 QunYing Road, Xingguang Industrial Zone, liushi, Yueqing City, Zhejiang, China

Tel: +86 577 61787391               Fax:+86 577 61787392            Skype: NQQK ELC

Mobile/WeChat/WhatsApp:+86-139 6878 5810

Web:www.nqqkelc.com     /     www.nqqk-china-manufacturer.com/          

E-mail:sales at nqqkelc.com

Thank you & Now send your kindly inquiry below, please!