The 25.165.0253.0 is a Type 8391/8491 wire-to-PCB terminal block connector designed for horizontal mounting with a 7.50 mm pole spacing. It features a cage clamp system with a rated cross section of 2.5 mm² and a rated current of 16 A at 20°C ambient temperature. The connector accommodates wire gauges from No. 22 to 12 AWG with a rated voltage of 300 V and current capacity of 20/30 A (or 25 A depending on configuration). The insulating housing is constructed from PA 66/6 gray material with UL 94-V0 rating, while the clamping body is nickel-plated brass and the contact clip features tin-plated E copper. This connector is commonly used in industrial control systems, automation equipment, and power distribution applications where reliable field wiring connections are required.