what causes a resistor to burn

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webxfx

Copper - Posts: 58

Joined: November 22, 2003

Location: Canada

Posted: January 24, 2005 at 8:37 PM / IP Logged

yes this might sound dumb, but as the title said - what causes a resistor to burn?

auex

Platinum - Posts: 5,041

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Joined: December 23, 2002

Location: Arizona, United States

Posted: January 24, 2005 at 9:16 PM / IP Logged

Resistors are components that resist the flow of electrical current. When electricity encounters resistance, the electricity is converted into heat/light. Think of it as friction. You rub your hand against something that is smooth your hand feels fine. You rub your hand against jeans your hand feels heat.

Someone else can probably explain it a little better.

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DDexter

Member - Posts: 18

Joined: December 03, 2004

Posted: January 24, 2005 at 9:46 PM / IP Logged

Resistors have a power rating (typ watts) ... Exceed that power, and the resistor will burn. (similat to how a fuse gets blown)

webxfx

Copper - Posts: 58

Joined: November 22, 2003

Location: Canada

Posted: January 25, 2005 at 7:24 AM / IP Logged

DDexter wrote:

Resistors have a power rating (typ watts) ... Exceed that power, and the resistor will burn. (similat to how a fuse gets blown)

Got it - so would a fuse help, so I stop blowing resistors?

misterjimbo

Silver - Posts: 535

Joined: October 11, 2003

Location: Michigan, United States

Posted: January 25, 2005 at 10:11 AM / IP Logged

yes and no. you will stop bburning resistors and start blowing fuses. you need to get a resistor with a higher current handling rating.

RobG35

Member - Posts: 1

Joined: November 23, 2004

Location: United States

Posted: January 27, 2005 at 2:40 PM / IP Logged

What is the value of the resistor?

Where is it used?

How much current is being drawn?

Rob Urbanek

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what causes a resistor to burn

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