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The SIEMENS 5SY6120-7 is a single-pole supplementary protector rated for 240 volts, designed to provide overcurrent protection for branch circuits and equipment in industrial and commercial electrical systems. Supplementary protectors differ from branch-circuit breakers in that they are intended to protect individual loads and components downstream of a main branch-circuit overcurrent device. This unit belongs to the SIEMENS 5SY6 series and is installed by licensed electricians in control panels, machine tool enclosures, and equipment distribution assemblies where a compact, reliable overcurrent device is required.
The 5SY6120-7 is suited for single-pole applications in 240-volt AC systems. Typical installations include industrial control panels, HVAC equipment enclosures, and commercial electrical distribution assemblies where supplementary protection is specified for individual devices or sub-circuits. The compact footprint of 3.661 inches by 0.827 inches by 3.268 inches allows it to fit within tight panel layouts and DIN-rail mounted enclosures.
Designed as an OEM-style supplementary protector for use in 240-volt single-pole applications within the SIEMENS 5SY6 series product family, compatible with standard DIN-rail panel assemblies requiring supplementary overcurrent protection.
Installation should be performed by a licensed electrician in accordance with the National Electrical Code (NEC) and any applicable local codes. De-energize the panel and verify the absence of voltage before handling or mounting the protector. Supplementary protectors are not intended to serve as the sole branch-circuit overcurrent device and must be installed downstream of a listed branch-circuit breaker as required by code. Confirm the load current rating matches the protector specification before energizing.
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