Bernstein 618.6121.120 Limit Switch I88-U1Z HW

Bernstein 618.6121.120 Limit Switch I88-U1Z HW RO11 is a compact plastic-bodied snap-action switch in the I88 family, featuring a RO11 roller/plunger actuator for fixed-position safety applications. It provides a 1NO/1NC contact arrangement rated for up to 3 A at 240 V AC (AC-15) with a rated insulation voltage of 250 V AC and a rated operational voltage of 240 V. The device supports direct opening action per IEC/EN 60947-5-1 annex K and includes a short-circuit protective device of 10 A gG; it is a II (totally insulated) protection-class switch. Mounting uses DIN 912 M5 screws on a steel mounting pad, and the housing integrates the switching elements for robust performance in industrial environments. Electrical data specify Ith = 10 A and Ue = 240 V, while the operating point tolerance is ±0.25 mm and the operating force tolerance is ±10%. The RO11 actuator and I88-series construction are designed for dependable actuation in safety-critical machinery, such as automated lines, where a roller-type actuator provides reliable limit sensing and interlocking functionality.