What the 2 Form C means for fit
The G6A-234P-ST-US-DC12: Two Form C (DPDT) contacts give you two independent changeover circuits per relay. That covers applications like interlocking two control signals or switching a load and its status feedback from one coil. The 12 VDC coil is common in PLC output banks and 24 VDC panels with a regulated 12 V rail.