Electric strikes come in many varieties. They can be 12 or 24 or even higher voltage and they may take AC or DC current and some even take both. ASC-F-S12 is a fail secure electric strike lock. The main feature of fail secure electric strike lock is that it stays locked even without power. The most common by far is a fail secure. When you need that buzzing sound you may have heard when being buzzed into an office that's the sound of AC current going through the electric strike. If you need this sound as a signal to push on the door when unlocking the strike then choose an AC electric strike and an AC power source or transformer. If you do not want or need this buzzing sound then choose a DC power source or transformer. The DC strike is almost completely silent when it releases except for a slight click sound. On average a DC electric strike will last longer than an AC electric strike.

Electric strikes come in many varieties. They can be 12 or 24 or even higher voltage and they may take AC or DC current and some even take both. ASC-F-S12 is a fail secure electric strike lock. The main feature of fail secure electric strike lock is that it stays locked even without power. The most common by far is a fail secure. When you need that buzzing sound you may have heard when being buzzed into an office that's the sound of AC current going through the electric strike. If you need this sound as a signal to push on the door when unlocking the strike then choose an AC electric strike and an AC power source or transformer. If you do not want or need this buzzing sound then choose a DC power source or transformer. The DC strike is almost completely silent when it releases except for a slight click sound. On average a DC electric strike will last longer than an AC electric strike.