ABB S1N100TL Bolt-On Molded Case Circuit Breaker

ABB S1N100TL Bolt-On Molded Case Circuit Breaker is a 3-pole, 100-amp device rated for 277/480 VAC three-phase service, designed for bolt-on mounting in ABB panelboards and switchgear. The S1N100TL provides protective interruption for distribution feeders in commercial and industrial power systems, helping guard circuits against overloads and short circuits within a compact molded-case form factor. With its 277/480 VAC rating, this breaker aligns with common voltage classes used for large facilities, enabling reliable protection for feeders powering lighting, motors, and other three-phase loads in modern electrical installations. The bolt-on mounting configuration facilitates secure mechanical attachment to compatible bus systems and panel structures, supporting straightforward installation and replacement in ABB-compatible assemblies. Constructed as a molded-case circuit breaker, the S1N100TL combines durability with practical serviceability for maintenance and field swaps in controlled indoor panel environments. In practical terms, this model fits systems that require a 3-pole, 100 A protective device for 277/480 VAC three-phase distribution, offering a clear, local means of interrupting power when protection is needed and integrating into layouts designed around S1N-type breaker footprints. For engineers selecting components, the S1N100TL provides a direct, standards-aligned option that matches the voltage class and phase configuration of many commercial power distribution schemes.