KNACRO SLA-12VDC-SL-C DC 12V 30A single-channel optocoupler isolation relay module supports high and low trigger Using high-quality module 30A relay, normally open interfaces Maximum load: AC 250V / 30A, DC 30V / 30A. SMD optocoupler isolation, driving ability, stable performancetrigger current 5mA. Module wiring through different ways to set high or low trigger. Relay control terminal voltage and the terminal voltage of the trigger can be done before and after class jumper powered completely isolated, can do around two different voltage requirements (such as a relay with 24V, triggering 5V). Fault-tolerant design, even if the control line is broken, the relay will not operate. Relay status indicator (red). User-friendly interface design, all interfaces can connect directly through the terminal leads, very convenient.