Safety switch rated SIL3 PLE CAT4
The ABB 2TLA050074R6125 is a safety switch carrying a SIL3 PLE CAT4 integrity rating, meaning it meets the highest performance level for safety-related control systems under EN ISO 13849-1 and IEC 62061. This rating is what defines its fit: it can be used in safety circuits up to Category 4 architecture (redundant, monitored) and Performance Level e, which covers the most critical guarding applications where a single fault cannot lead to loss of safety function.