What it fits — bypass kit for 3RW44 soft starter frames
The 3RW4766-0KC01: This is a bypass unit, not a standalone soft starter. It retrofits onto the 3RW44 series soft starters in frames 3RW4458, 3RW4465, and 3RW4466 — the three largest frame sizes in that family. When the soft starter reaches the end of its ramp, the bypass contactor inside this kit closes to carry the full motor current, taking the SCRs out of the circuit. That eliminates continuous SCR conduction losses and heat buildup inside the panel — a meaningful consideration for enclosure thermal management on high-duty-cycle applications.
Compliance documentation — RoHS and substance prohibitance
The substance prohibitance date is 03/01/2017, which aligns with the EU RoHS recast (2011/65/EU) effective date for industrial equipment. Siemens provides RoHS and REACH declarations for this order code — the documentation trail is clean for EU customs clearance and end-customer compliance audits. For an import/export desk, the landed cost calculation should factor in that no additional substance-restriction paperwork (beyond the standard RoHS declaration) is triggered by this part. The prohibitance date confirms it meets the current threshold.