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Relay circuits are the most popular electronically controlled alternating current (AC) switching method, because of their simplicity and safety, as the switching circuit and the switched voltage are completely separated. Their biggest disadvantage is the low switching speed (eg in the case of billboards) and the short lifetime of the contacts.
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Power level indicator for k4020 - set for self-assembly
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Information and advertising board with red LEDs - a set for self-assembly
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Eliminator of knocking on booster K3503 booster - Self-assembly kit
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Card with 4 triacs - set for self-assembly.