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Ok do i need higher than 1amp diode on this??


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2000vsm 
Copper - Posts: 65
Copper spacespace
Joined: June 30, 2002
Posted: August 12, 2002 at 4:26 PM / IP Logged  

Ok here

(12V+)----------[        | ]--------------SPDT RELAY 85 -----------86 --------ground

                   Diode cathode side is on the RIGHT

--------------->----->------> direction of current flow

is 1 amp too small here?????????  also i see that 12volt here has diodes on the other side of the SPDT relay.. i assume they are using 1 amp diode and i'ts ok

sparkyssb 
Copper - Posts: 205
Copper spacespace
Joined: March 09, 2002
Location: United States
Posted: August 12, 2002 at 4:52 PM / IP Logged  

probably not for a relay. you should be ok.

2000vsm 
Copper - Posts: 65
Copper spacespace
Joined: June 30, 2002
Posted: August 12, 2002 at 6:21 PM / IP Logged  

you 100% sure?? what is the wattage rating of the coil of a 30/40 amp relay? (or tell me the resistance needed in the coil)

because i DO NOT want to pull out my wonderful wiring to change a few diodes here and there....

omega 
Copper - Posts: 54
Copper spacespace
Joined: July 04, 2002
Location: Canada
Posted: August 13, 2002 at 10:34 PM / IP Logged  

I've never really seen more than 1 amp diodes used in car alarm installs myself... 

1 Amp is fine.  The typical current draw of a 30/40A, 12V SPDT relay is about 150-200mA, by the way.

sparkyssb 
Copper - Posts: 205
Copper spacespace
Joined: March 09, 2002
Location: United States
Posted: August 14, 2002 at 12:54 PM / IP Logged  

uh huh...

2000vsm 
Copper - Posts: 65
Copper spacespace
Joined: June 30, 2002
Posted: August 14, 2002 at 9:59 PM / IP Logged  

car alarms maybe but doing other stuff like lights and ign.. you need 30 amp diodes...

btw.. the 6amp got hot and turned RED.... didn't work... i ended up using a relay... and i didn't ha've to change out the diodes since 150-200ma is ok...

lucky me

omega 
Copper - Posts: 54
Copper spacespace
Joined: July 04, 2002
Location: Canada
Posted: August 17, 2002 at 1:56 PM / IP Logged  

6 amp? 30 amp?  From the diagram it didn't indicate you were using it for lights or ignition!  That's why I said 1 amp would be fine...

In the case of a high amperage circuit I would have definitely recommended relays.


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