Active production — no lifecycle risk for BOM planning
The 3RT2926-1ES00 carries an active lifecycle status from Siemens, so there is no end-of-life clock running on this order code for new builds or MRO stock. It is a current-production SIRIUS accessory, meaning the BOM line stays stable through the panel's production run without a forced last-time-buy.
What it is and where it clips on
This is a diode-combination surge suppressor designed to clamp the inductive kickback from a DC-operated contactor coil when the control circuit opens. It mounts directly onto the contactor via clip-on fastening — no DIN rail slot consumed, no additional wiring space needed beyond the contactor's own footprint. The suppressor fits Siemens size S0 contactors in the 3RT2.2 series, which covers the compact block-form contactor range up to about 38 A AC-3.
DC voltage range — the critical fit parameter
Rated for DC control supply voltages from 30 V up to 250 V, this suppressor handles the full range of common industrial DC coil voltages — 24 V systems are below the floor, so verify your actual coil voltage is within the band. The diode combination design is polarity-sensitive: the suppressor must be wired with the correct DC polarity relative to the coil, unlike a varistor or RC snubber that works on AC.
Physical fit — panel fill factor
At 12 mm depth, 30 mm width, and 19 mm height, the suppressor adds negligible volume to the contactor assembly — it sits flush against the contactor body without protruding into adjacent wiring channels. Mounting position is unrestricted, so the suppressor can be oriented in any direction that suits the panel layout and wire routing.
Environmental limits and compliance
Operates from -25 °C to +60 °C ambient, with storage tolerance from -40 °C to +80 °C — covers most indoor industrial panel environments without derating. RoHS compliance is documented with a substance prohibition date of October 1, 2009, meeting the EU directive requirements for new equipment.