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The SIEMENS 3RT29161BB00 is a surge suppressor accessory designed for use with Size S00 contactors. It clips directly onto a compatible contactor coil circuit to absorb voltage spikes and transient overvoltages generated when the coil de-energizes. By clamping these spikes, it protects sensitive control circuitry, PLCs, and adjacent devices from damage caused by inductive kickback. This compact component measures 2.205 inches long by 1.220 inches wide by 0.394 inches deep and weighs approximately 0.013 pounds. It is typically installed by licensed electricians or industrial controls technicians during contactor assembly or panel build-out.
This surge suppressor is suited for industrial control panel applications where Size S00 Siemens contactors are deployed. Common install scenarios include motor control centers, machine control panels, and HVAC electrical panels where small-frame contactors switch inductive loads. Its low-profile form factor allows installation in tight enclosures without adding significant bulk to the contactor assembly.
Designed as an OEM-style accessory for Size S00 frame Siemens contactors requiring coil surge suppression.
Installation should be performed by a qualified electrician with the panel de-energized and locked out per NFPA 70E lockout/tagout procedures. The suppressor snaps onto the contactor coil terminals and requires no additional wiring tools in most configurations. Verify the contactor frame size is S00 before installing to ensure proper mechanical and electrical fitment. Follow applicable NEC requirements for industrial control panel wiring and component installation.
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