The MCH8D-25M is a 2-pole, 25A, 12VDC modular contactor designed for household DC power distribution systems. Built for DIN rail mounting, this compact unit integrates seamlessly into standard electrical enclosures, making installation straightforward and efficient. The contactor features a built-in manual control switch with clearly marked I (on), auto, and O (off) positions, giving users direct hands-on control alongside automatic operation. A red indicator light provides at-a-glance status monitoring, while the robust screw terminal connections — labeled 1, 2, 3, and 4 — ensure secure and reliable wiring. Rated for 50/60Hz environments, this 2-pole DC modular contactor is well-suited for controlling lighting, HVAC systems, and other household DC loads. Its space-saving design and durable white enclosure make it a practical choice for both residential and light commercial electrical panels. Please confirm polarity before installation and use.