The 2-, 3- and 5-wire connectors accommodate stranded wires from 0.14 to 4 mm², as well as solid and fine-stranded wires from 0.2 to 4 mm² (24–12 AWG). They are therefore ideally suited to connect different wire sizes and types to each other. Tinned current bars ensure a permanent, gas-tight and secure wire connection.

Ratings up to 32 A/450 V and 105 °C maximum continuous operating temperature allow the 221 Series Splicing Connectors to be used at ambient temperatures up to 85 °C (T85), making them ideal for small and large loads. Furthermore, approvals like ENEC or UL allow them to be used in worldwide applications.