Hi,

what the following value of the finder 40.52 /230VAC Coil relay mean ?



Regards

 

hi mtcjo,
Its the lowest switching load at which the relay contacts will make a good contact, in order to breakdown the contact surfaces resistance.
It you wanted a lower figure, look at 'wetted relay contact'
E

Look here.
https://forum.allaboutcircuits.com/threads/relay-contact-wetting.2054/

 

hi mtcjo,
Its the lowest switching load at which the relay contacts will make a good contact, in order to breakdown the contact surfaces resistance.
It you wanted a lower figure, look at 'wetted relay contact'
E

Look here.
https://forum.allaboutcircuits.com/threads/relay-contact-wetting.2054/

thank you ericgibbs,

300(5/5) this mean the min load current is 5mA for each 5 V ?

also the rated coil consumption value 5mA this mean the min current to energize the relay ?

regards

 

hi,
The relay coil when powered from 230Vac will draw a current through the coil of 5mA, in order to energise the relay.
E
The 300/5/5 means greater than.
300mWatts or 5 Volts or 5mA is required to overcome the contact resistance.

What are you switching.?

 

like this

 

hi,
When the relay contacts are closed the 10K will have a current of 5v/10k = 0.5mA [ which is well below the 5mA spec]

The 5v across the relay contacts when the relay is energised, should in theory be enough to breakdown the contact resistance.

I would use a 1K resistor and get the required 5mA.??

A useful alternative would be to use a 270R and say a Red LED in place of the 10k.

LED lit means the relay is energised and the contacts closed.

E

 

like this ?



should i use debounce circuit ?

 

hi,
That looks OK.
You could swap over the 270R and LED, if it makes the mounting easier.
E
If it needs debouncing, add a10n cap from pin #6 to 0V

 

thank you for your appreciated effort

 

the capacitor 10nf or 10 uf ?

 

I would use a 10nF, never greater than 100nF.

Are you detecting an Interrupt on pin #6 or just checking for a voltage Low.?

 

yes , i detecting interrupt on pin #6

 

A 10nF should work OK.
You could add extra debounce in your program if needed.

Out of interest, what is the project controlling.?

 

i need to turn motor on for a certain time if 220v push button pressed.
also i need to control the motor using RF remote control .

 

Thank you , sounds an interesting project.

I guess you know that decoupling of the PIC power supply +5V is required, say 100nF and 100uF.?

 

Thank you , sounds an interesting project.

I guess you know that decoupling of the PIC power supply +5V is required, say 100nF and 100uF.?

you mean add 100nf and 100uf between Vdd and Vss ?
usually i use 100nf and 10uf ^^