Stand Alone Solid State Relay- Black Clean Up Your Wiring With An Solid State Relay Block MSD IgnitionClean up your wiring with an MSD Solid State Relay Block. This module takes the place of 4 standard relays and eliminates unsightly wiring. 4 independent channels can be activated using either power or ground. Each channel is capable of handling 50 Amps for up to 8 seconds or 20 Amps of continuous current. With 4 channels providing up to 200 Amps of momentary or 80 Amps constant combined power, you can easily control electric fans, water pumps,