The ES15/4N is a 4-pole miniature relay socket designed for DIN rail mounting with finger-safe construction and 14 pins. It is rated for 300 volts and 12 amps (SA) with brass nickel-plated contacts and M3 steel nickel-plated terminals. The socket features break-resistant thermoplastic molding and is supplied with box lug terminal connections. It is UL recognized (File No. E113714) and CSA certified (File No. LR26716), making it suitable for industrial control and automation applications requiring reliable relay switching and safe installation on standard DIN rails.