Varistor surge suppression for SIRIUS contactors
The 3RT5926-1BE00: A varistor-type surge suppressor that clips voltage transients across the coil of a SIRIUS contactor in sizes S0, S2, and S3. The varistor conducts when the peak voltage exceeds its clamping threshold, protecting the control circuit from inductive kickback during de-energisation. Snaps directly onto the contactor — no separate wiring or DIN-rail space needed. The same unit fits S0 through S3 frame sizes, which simplifies BOM consolidation across a panel with mixed contactor frames.