The 78.013.0253.0 is a 2-pole male modular insert for the FLE STC connector system, rated for 2.8 kV / 20 A with crimp connection and turned contacts. The insert features a copper alloy contact material with silver plating, a nominal voltage of 5500 V (rated voltage face/ground 5500 V), and a rated impulse voltage of 18 kV, providing robust electrical isolation and switching capability. The insulation material is UL94 V0 rated (black, pollution degree 2) and operates across a temperature range of -40 °C to +120 °C. This modular connector insert is commonly used in industrial control systems, power distribution panels, and equipment requiring reliable high-voltage switching with compact, space-saving modular design.