Some confuse !

[mowhoong]

I intend to purchase a micro switch. According to the previous
product spec., it states 6A250VAC,10(1.5)A250V. I 'm confused that it
shows two diffrent spec. Can any person
help me in this question ? Thanks
Best Regards

 

[Eeyore]

I intend to purchase a micro switch. According to the previous
product spec., it states 6A250VAC,10(1.5)A250V. I 'm confused that it
shows two diffrent spec. Can any person
help me in this question ? Thanks

The first figure is for a resistive load I believe. The other figures may be for
reactive loads.

Graham

 

[John Popelish]

I intend to purchase a micro switch. According to the previous
product spec., it states 6A250VAC,10(1.5)A250V. I 'm confused that it
shows two diffrent spec. Can any person
help me in this question ? Thanks

The problem with micro switches is that there may not be
much air space between open contacts, so they tend to draw
an arc that damages the contacts. This is especially bad
with inductive loads and DC voltage. AC voltage keeps
passing through zero twice per cycle, so that helps limit
the time an arc will continue.

I think the first pair is the AC rating. 6A with up to 250
volts AC.

The second set is probably a DC rating (V, not VAC), 1.5
amps with an inductive load, or perhaps an incandescent lamp
load (that produces something like a 10 times inrush when
the filaments are cold) and the 10 amp rating is for a pure
resistance load like a heating element.

In all cases, the ratings are for some (reasonable) number
of operating cycles. The switch will last a lot longer if
you load to only about half of these ratings.

 

[John Fields]

The first figure is for a resistive load I believe. The other figures may be for
reactive loads.

---
"I believe"?

"may be for"?

Up to your usual technical excellence in guessing, I see...

At the very least you could have asked for the manufacturer and part
number and then pretended that you knew what you were talking about.

 

[neon]

Micro Switches Will Conduct The Load As Specified But Not Coniniusly Open Close

 

[Eeyore]

---
"I believe"?

"may be for"?

Up to your usual technical excellence in guessing, I see...

At the very least you could have asked for the manufacturer and part
number and then pretended that you knew what you were talking about.

Yawn ...... Is that the best you've got to offer ?

What's your answer to the OP's question then ?

Graham

 

[John Fields]

Yawn ...... Is that the best you've got to offer ?

 

[Eeyore]

So nice of you to think of me.


I was thinking along those lines too but I reckoned a prompt answer would be more use
than a pedantic one.

At least the OP should now be aware that a switch rating is related to the type of load
(and indeed - although not in this case - whether it's AC or DC).

Graham

 

[mowhoong]

Thanks members for the reply. From the response, it seems to be DC
voltage have the most destructive form than the
AC voltage in micro switch's contact. It raises another question from
me, that since the micro switch' contact can
tolerate 10A250VDC, hence it should have higher tolerance value when
apply in AC voltage.( higher than 6A250VAC ) ?

regards

 

[Baron]

Charlie Siegrist inscribed thus:

My first guess would be the same as John P's re AC/DC, but I am
confused by
the parenthetical reference on the second spec. Do you have a part
number? On a bit of reflection, perhaps 1.5A is the instantaneous DC
switching
limit, and 10A the final DC steady-state limit. Thinking along
those lines, it then makes sense that the switch can handle a higher
DC vs. AC steady-state.

You are spot on. The 10A is maximum continuous DC. Bulgin switches
http://www.bulgin.co.uk/PDFs/CatNo82/Switches2005.pdf