The HASCO COMPONENTS part HAT903ASDC12 is an electromechanical relay designed for heavy-duty applications. It has a voltage rating of 12VDC and a resistance of 155Ohm. This relay is capable of handling up to 30ADC/40AAC of current. The relay features a single-pole single-throw normally open configuration, making it suitable for various control and switching applications. It has compact dimensions measuring approximately 50.29x27.43x28.19mm, allowing for easy installation in tight spaces. Additionally, this relay is equipped with a flange for secure mounting. It is built to withstand harsh environmental conditions and ensure reliable performance. Overall, the HAT903ASDC12 provides a robust and efficient solution for high-current electrical load control.