We are trying to switch both AC and DC with the same device. AC is approx .1-5VAC with 1-200hz, 5A, and DC is 15V, 5A. standard relays cannot switch fast enough for us and I found that the reed relay works great. However, to get these specs, these suckers are EXPENSIVE! Is there a solid state device that can switch a variable AC form AND DC? If not, is there something that can do the AC since that seems to be the issue?