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<blockquote data-quote="Ded Driver" data-source="post: 512011" data-attributes="member: 12692"><p>I dont know whats used in Redarc relays specifically, but usually the expensive ones have silver plated contactors. This makes a difference to the voltage drop across the surface to surface contact. This voltage drop on cheaper relays then causes the contact points to burn/wear faster, thus the relay doesnt last near as long.</p><p>The other area in cost is the quality of the copper wire, & of the enamel coating on the copper wire in the coil. eg, cheap chinese coils (in anything) tend to get hot, melt the cheap & thin enamel, & then the coil shorts out.</p><p>horses for courses ... & budget plays a part in what most people buy, but I never buy the cheapest relay for use in a vehicle. reliabilty is important.</p></blockquote><p></p>
[QUOTE="Ded Driver, post: 512011, member: 12692"] I dont know whats used in Redarc relays specifically, but usually the expensive ones have silver plated contactors. This makes a difference to the voltage drop across the surface to surface contact. This voltage drop on cheaper relays then causes the contact points to burn/wear faster, thus the relay doesnt last near as long. The other area in cost is the quality of the copper wire, & of the enamel coating on the copper wire in the coil. eg, cheap chinese coils (in anything) tend to get hot, melt the cheap & thin enamel, & then the coil shorts out. horses for courses ... & budget plays a part in what most people buy, but I never buy the cheapest relay for use in a vehicle. reliabilty is important. [/QUOTE]
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