The PT series offers some outstanding features and benefits. They share an advanced design featuring no braided wire and no welds or solder joints in the contact area, which enhances reliability. Additionally, they have a very efficient magnetic structure. With an industry-standard footprint, the PT series offers space savings with a low-profile design. The PT series has markings to easily identify them as AC or DC coils. Optional LEDs can be built into the relays to indicate whether power is reaching the relay coil.