The DC relay from Yueqing Huilong is designed for direct current systems, providing reliable switching in battery - powered and low - voltage applications. This relay features coil voltages ranging from 5V to 48V DC, with contact ratings up to 20A/30V DC, suitable for various DC loads. The relay’s housing is made from flame - retardant ABS (UL94 V - 0), while the internal components include gold - plated contacts to ensure low resistance and long - term conductivity. It incorporates an anti - reverse diode to protect against voltage spikes, making it suitable for inductive loads like solenoids and motors. The DC relay supports both through - hole and surface - mount installation, adapting to different PCB designs. Ideal for use in automotive electronics, renewable energy systems, and portable devices, this relay offers a mechanical life of 10 million cycles and electrical life of 500,000 cycles, balancing durability with efficiency in DC circuits.