The 812H-1A-S-DC12V part of Song Chuan relay is a single-pole, single-throw relay with a 12A normally open (NO) contact configuration. It operates on 12V DC power and has a contact rating of 12A at 30V DC. The relay also has a maximum switching power of 720W, making it ideal for applications requiring high power switching. It is a single pole device with a sealed construction, making it dust and moisture resistant and suitable for use in more hostile environments. The coil consumes only 80 mA at 12V, making it very energy efficient. The relay has a mechanical life of 10 million operations, and an electrical life of 100,000 operations.