Solid State Relays AC and DC for PCB mounting. Single and three phase Solid State Relays for panel mounting. 5 switching types, up to 110 A. SOLITRON – ready to mount Solid State Relays with integrated heatsink, one and two pole output. SOLITRON Mini - compact Solid State Relays for DIN-rail mounting with integrated heatsink for applications up to 20A.