SLS switch 1-pole E characteristic 40A for top hat rail mounting. SH switch according to DIN VDE 0641-21 and dimensional standard DIN 43880 size 2. SLS in 1- or 3-pole design, single-pole switching, with separate contact position indicator. For direct mounting on top hat rail. The standard (no suggestions) enables the following locks: for the customer to prevent accidental or deliberate switching, for the installer with a padlock when working in the system, for the VNB with sealing wire, padlock or special key.