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The SIEMENS 3RT29161JK00 is a surge suppressor accessory designed for use with Size S00 contactors. It clips directly onto a compatible contactor to suppress voltage transients generated when the coil de-energizes, protecting control circuits and extending the service life of connected components. Electricians and controls technicians install this device as part of motor starter assemblies and control panel builds where inductive load switching is common. The unit is compact, weighing 0.015 pounds, and measures 2.165 inches long by 1.181 inches wide by 0.394 inches tall, making it suitable for tight panel layouts.
This surge suppressor is intended for installation on Size S00 Siemens contactors in light-duty motor control and automation applications. Typical use cases include low-voltage control panels in commercial HVAC systems, small motor starters, and industrial automation enclosures where coil-generated voltage spikes must be suppressed to protect PLCs, relays, and other sensitive control devices. It ships individually as a single unit per pack.
Designed as an OEM-style accessory for Siemens Size S00 contactors in low-voltage motor control and automation applications.
Installation is typically performed by a licensed electrician or qualified controls technician. De-energize and lock out the panel before attaching or removing any contactor accessory, following NFPA 70E arc flash and lockout/tagout procedures. The suppressor snaps onto the contactor coil terminals and requires no additional tools in most cases. Verify the contactor is the correct size designation before installing, as surge suppressors are size-specific and will not seat properly on incompatible frames.
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