Question: I have a relay with 12V and 8A, it was not working properly. I want to change it with 12V 16A relay is that possible? Because I am thinking amper is the power of relay. If a relay can open 16A circut with 12V, It can easly open the 8A. Am I right?

This is relays Finder is broken,

[![enter image description here](https://i.stack.imgur.com/xZ3hD.png)](https://i.stack.imgur.com/xZ3hD.png)

Omron which is I want to use

[![enter image description here](https://i.stack.imgur.com/P0ypI.png)](https://i.stack.imgur.com/P0ypI.png)

Answer: 
> 
> If a relay can open 16A circut with 12V, It can easly open the 8A. Am I right?
> 
> 
> 

It's not that simple.

@ocrdu has pointed out some important highlights - especially about driving the relay.

But there are two important things that should be considered:

* The load type the relay is switching (Motor, resistive, or capacitive)
* Inrush current rating of the contacts.

Please note that a big common problem that can be seen on relays is **contact sticking**, which is mostly caused by the arcs on especially switch-on events (Think of it something like welding).

[finder 40.52](https://www.finder-relais.net/en/finder-relays-series-40.pdf) is capable of switching a peak current of 15A. If the load draws a higher current even for a short time then the contacts may get sticked. So,

> 
> I have a relay with 12V and 8A, it was not working properly.
> 
> 
> 

That may be the problem that you are currently facing.

[Omron G2R-1E-12VDC](https://www.infinity-electronic.hk/datasheet/9d-G2R-1-H-T130-DC12.pdf) has a max switching current rating of 16A. So, even the nominal current rating is higher than finder's (16Anom/16Amax against 8Anom/15Amax), there's still a risk of encountering a contact sticking problem. So,

* Identify the load type
* Identify the peak switching current requirement
* Identify the max power
Both are switched with 12V, both are specced for 230V~, and the replacement can handle a higher current than the broken one, so no problem there.

You may want to look up the switching current for both; it could be the replacement's coil takes more current when switching.