HF41F/12-HS(555) is a 12VDC high-speed, high frequency, 5 amp, single-side electromechanical relay made by the Hongfa company. It features a zero cross turn-on, metal oxide varistors and built-in suppressors, a 4,000VAC dielectric strength, and 16A inrush current. It is IP67 dust and moisture proof and has a dielectric strength of 4,000VAC. This relay is suitable for various electronic applications such as burglar alarms, remote control and electric locks.