Part of the Sentron ND Frame family, the Siemens SND6A100LIG operates as a 3-pole, 1000A molded case circuit breaker built for heavy-duty industrial applications. This bolt-on MCCB mounts into Siemens Sentron P4 and P5 panelboards, plus SB series switchboards. It serves as a reliable component before transitioning to the newer 3VA Series retrofit solutions. Equipped with a Sensitrip IV electronic trip unit, it offers adjustable long-time, instantaneous, and ground-fault (LIG) protection.
What panelboards and switchboards are compatible with the SND6A100LIG?
This Sentron ND-frame breaker is designed for use in Siemens Type P4 and P5 panelboards, as well as SB1, SB2, and SB3 switchboards.
What protection features are included in the LIG electronic trip unit?
The LIG designation means the solid-state trip unit provides adjustable Long-Time (overload), Instantaneous (short-circuit), and Ground-Fault protection for precise system coordination.
Does the SND6A100LIG catalog number include both the frame and trip unit?
Yes, this is a complete molded case circuit breaker assembly that includes the 1000A ND-frame and the factory-installed electronic trip unit.
What lug kits are used with this 1000A Siemens breaker?
This breaker accepts standard Siemens ND-frame mechanical lug kits, such as the 3TA4N8500 or 3TA3N8750, depending on the required wire size and whether you are using copper or aluminum conductors.
Why is ground-fault protection important for this 1000A breaker?
Ground-fault protection detects low-level leakage currents that might not trip a standard overcurrent device, helping to prevent equipment damage and electrical fires in high-capacity distribution systems.
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