Solid State Relay Circuit Symbol? | Physics Forums Jun 11, 2006I googled solid state relay schematic symbol, and got lots of hits (not all useful). Here's a link to a datasheet for a highside SSR from STMicroelectronics. The block diagram in Figure 2 would be a good starting point for drawing a schematic symbol. I'd probably simplify it to the output MOSFET and input hysteresis gate, or something similar.SPDT Solid-state Relay | Physics ForumsMay 03, 2017A few questions about solid-state relays | Physics ForumsDec 22, 2012Transistors for 3.6 kW inverter circuit | Physics ForumsJul 21, 2012What is this electrical component CR ? | Physics ForumsJan 16, 2012See more results What symbol to use for a solid state relay in a schematic What symbol should I use to indicate a solid state relay in a schematic? The internal schematic of the solid state relay is shown in the data sheet, but showing all of the internal components in the schematic is not necessary and would be more confusing than a single symbol.