The Siemens 3RT2517-2BB40-ZW97 is a 4-pole contactor in the SIRIUS 3RT2 series, rated AC-3 at 5.5 kW with a DC 24 V coil. It carries 2 normally-open and 2 normally-closed auxiliary contacts, and terminates through spring-loaded terminals — no screwdriver needed for the power or control wiring. The size S00 frame keeps the panel footprint tight, and this order code ships as a multipack of 32 pieces, which simplifies BOM line-item management for panel builders running multiple identical motor starters.
The DC 24 V coil is standard for control circuits in industrial panels, and the spring-loaded terminals accept 0.2–2.5 mm² solid or ferruled stranded wire without torque settings, which speeds wiring and reduces connection faults. The 2NO+2NC contact configuration gives one spare set of auxiliary contacts beyond the basic self-latching pair, enough for a feedback signal to the PLC or a status lamp without adding a separate auxiliary contact block.
Integration notes
Spring-loaded terminals accept wire sizes from 0.2 mm² up to 2.5 mm² with a strip length of 8 mm. The DC 24 V coil draws approximately 0.2 A at pickup and holds at about 0.1 A — check the control-transformer sizing if multiple contactors pick up simultaneously. The multipack of 32 pieces is factory-sealed; open only what you need for the current build and store the rest in a dry, moderate-temperature environment to keep the coil insulation and spring terminals in spec.