The Cyber-Spy.Com Usenet Archive Feeds Directly
From The Open And Publicly Available Newsgroup
This Group And Thousands Of Others Are Available
On Most IS NNTP News Servers On Port 119.
Cyber-Spy.Com Is NOT Responsible For Any Topic,
Opinions Or Content Posted To This Or Any Other
Newsgroup. This Web Archive Of The Newsgroup And
Posts Are For Informational Purposes Only.
From: "John Jardine"
Subject: Re: Help with snubber circuits
Date: Wed, 11 Dec 2002 12:38:46 -0000
NNTP-Posting-Date: 11 Dec 2002 12:26:16 GMT
X-Newsreader: Microsoft Outlook Express 5.00.2615.200
Jim_12 wrote in message
> I have a 240VAC lampflash unit with no snubbing on the relay contacts.
> would like to add snubbing to this to reduce the EMI.
> Can anyone help explain basic snubbing and any snubbing top tips.
> The lamp is a 60w regular bulb and the unit flashes this at about once a
A snubber in your app' will be of no value.
Snubbers are meant to work with inductive loads to suppress the spark that
can occur as the contacts open.
Inductive loads when open circuited by a switch can generate extremely high
voltages as the inductive magnetic field collapses. The capacitor in the
snubber acts to soak up this energy as the contacts are opening and keep the
circuit voltage to a level that does not cause spark over.
In your case the load is purely resistive. Which means no energy storage at
any time, which means when the contacts open the current flowing stops
If you are getting too much contact sparking and erosion then the relay is
too small for the job.
Go Back To The Cyber-Spy.Com
Usenet Web Archive Index Of
The sci.electronics.design Newsgroup