The gate firing circuit is usually isolated from the main low-voltage circuits because, as in this case, the cathode-anode of the SCR is at 480 VAC. The power controller board is powered by these ...

I am not sure of the real power supply rail voltages yet, but they must be at lease −10V for the 741 op-amp to work (relative to the +240V rail as the whole control circuit is relative to the SCR ...

If the SCS is turned on with the cathode-gate signal like a conventional SCR, a sufficiently positive signal on the anode gate will subsequently turn it off. A positive signal applied to both ...

When the 555 is inhibited, the gate pulses cease and the SCR current is AC ... 0.1uf capacitor between gate and cathode substantially increases the device dV /dT rating, and also reduces the noise ...

Applied Power Systems announces the release of its BAP3012 next generation twelve pulse gate firing board which provides robust and reliable operation of parallel or series connected SCR (Silicon ...