The ABB TMP3SB12R is a modular metering main breaker module designed for heavy-duty electrical setups. This 1200 Amp unit supports both single-phase (3-wire, 120/240 V AC) and three-phase (4-wire, 208Y/120 V AC) systems, making it pretty versatile for various industrial applications. Rated for a 100 kAIC interrupting capacity, it includes the breaker itself and accommodates line and load lugs for conductors ranging from 250 to 500 MCM, with the option to feed from either the top or bottom. You can count on reliable performance with this module, and it's conveniently available through BSP Automation, making it a solid choice when you need dependable power distribution gear that can handle the heavy lifting.