fan, relay and switch

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ahliangjo

Member - Posts: 2

Joined: January 18, 2009

Location: Singapore

Posted: January 18, 2009 at 11:13 AM / IP Logged

anyone able to help me? i am a newbie. i want to connect a fan with a relay n switch but not sure how to connect. below is the spec of the fan n relay.

Fan: DC12V, 0.37A, 4.5W

please let me know wat size of fuse and the connection of the relay to fan and the switch. Thanks

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i am an idiot

Platinum - Posts: 13,667

This member consistently provides reliable information

Joined: September 21, 2006

Location: Louisiana, United States

Posted: January 18, 2009 at 11:22 AM / IP Logged

You do not need a relay for that fan. A 1 amp fuse and a 3 amp toggle switch should be fine for that. Simply connect the fuse to a 12 volt power source, connect one leg of the switch to the fuse. Connect the other leg of the switch to the red wire of the fan, ground the black wire of the fan.

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ahliangjo

Member - Posts: 2

Joined: January 18, 2009

Location: Singapore

Posted: January 19, 2009 at 9:29 AM / IP Logged

i am an idiot wrote:

You do not need a relay for that fan. A 1 amp fuse and a 3 amp toggle switch should be fine for that. Simply connect the fuse to a 12 volt power source, connect one leg of the switch to the fuse. Connect the other leg of the switch to the red wire of the fan, ground the black wire of the fan.

how do i know which fan to choose 4.5" 0.37A Fan or 3" 0.1A Fan. Which 1 is better?

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i am an idiot

Platinum - Posts: 13,667

Joined: September 21, 2006

Location: Louisiana, United States

Posted: January 19, 2009 at 10:13 AM / IP Logged

What is the CFM rating of each fan? What are you trying to cool? I really need more info to answer that question, but neither would need a relay.

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fan, relay and switch

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