Songle relays

Other Hardware Motors, Mechanics, Power and CNC
1

Hi,

I'd like to know how reliable are those 5V Songle relays on the many breakout board that are sold on ebay/other places ?

They're marked at 10Amps for 120V or 240V (in my case, I would use them on main's 120V)

Would guys rely on them:

  • at the full 10 amps ?
  • on a resistive or inductive load?

Thanks for you answers and ideas :slight_smile:

2

We need a link to the datasheet to know what you are talking about.

And you need to tell us what the relay will be controlling.

Personally I would like my relays to have at least twice the capacity of my actual load. But I am certainly not an expert.

...R

3

You're right,

Here is the relay datasheet : http://pub.ucpros.com/download/27115-Songle-Relay-Datasheet.pdf?osCsid=kaoa7n7eeqvl4v5ct4s6giap72

Form C

As for things connected, that is still to be determined.. its more of a "would you connect a 10A" load on those relay?" question

i want to experiment with IoT devices and want to build a remote power bar. So basically, there could be any type of things connected on the bar and be a load on the relay.

4

The approval agency file(s) listed in the datasheet will give more detailed information. Generally, I would only consider using them for up to 5A loads. For highly inductive loads, they show only 3A rating. Songle's SLA type might be better suited for your application.

5

If just switching on/off, consider a MOSFET. 10A is not a large current for many common MOSFETs. There is no arcing contacts to burn out. It depends on your usage of course.

Weedpharma

6

I would never attempt to switch a 10 amp AC load with those relays. Use a solid state relay (SSR) instead.

Also note that the relay contact voltage rating for DC circuits is very different from AC.

7

Songle's SLA type might be better suited for your application.

HERES: the SLA on an optically-isolated board for =$5

DISCLAIMER: Mentioned stuff from my own shop...

8

weedpharma:
If just switching on/off, consider a MOSFET. 10A is not a large current for many common MOSFETs. There is no arcing contacts to burn out. It depends on your usage of course.

Weedpharma

Thanks but i'l be switching a AC load.

In that case, a triac with a zero-cross opto and a snubber circuit would be better choice :wink:

9

Rigor_M:
Thanks but i'l be switching a AC load.

In that case, a triac with a zero-cross opto and a snubber circuit would be better choice :wink:

Or more simply, an off the shelf SSR.

Weedpharma