The 21.311.0453.0 is a divisible terminal strip with integrated wire protection (DSI) designed for secure electrical interconnections. This 4-pole configuration features a 30 E/405 type designation and is rated for 300V operation with wire gauges from No. 22 to 12 AWG, supporting current ratings of 20/30A per UL and CSA standards. The terminal strip incorporates a clamping body made of zinc-plated steel with tin-plated E-copper contact clips and zinc-plated steel clamping screws, ensuring reliable long-term performance. The insulating housing is constructed from PA 6/66 material with UL 94-V-0 flame rating. This product is commonly used in industrial control panels, power distribution systems, and equipment requiring compact, space-saving interconnect solutions with enhanced safety through integrated wire protection.