Siemens MMKT800MC3 800A 3-Pole 1000 V Circuit Breaker

Siemens MMKT800MC3 delivers robust protection for large 3-phase electrical systems. With an 800-amp rating and three poles, this 1000 V circuit breaker is built to safeguard heavy feeders, motors, and distribution panels in manufacturing environments, data centers, and commercial facilities.

• Part Number: MMKT800MC3
• Current rating: 800 A
• Poles: 3
• Voltage rating: 1000 V

Why choose this Siemens breaker? It’s designed to fit and perform within Siemens’ ecosystem, offering reliable interruption and easy compatibility with Siemens switchgear and panel infrastructure. The 3-pole design ensures synchronized disconnection across all phases, protecting three-phase loads from unbalanced power and potential damage.

Practical use cases

• Industrial power distribution: Feeding heavy machinery, conveyors, and large motors where clean, coordinated tripping is essential.
• Three-phase panels and switchgear: Replacement or upgrade in systems designed for Siemens MMKT series parts.
• Data centers or commercial facilities with high-energy demands: Maintain reliability and uptime by quickly isolating faults.

What problems does it solve?

• Prevents equipment damage from overloads and short circuits by rapidly interrupting fault currents.
• Minimizes downtime by providing predictable, coordinated protection across all three phases.
• Enhances system safety and reliability in high-voltage, high-current environments.

Installation and maintenance tips

• Ensure compatibility with your panel or switchgear and service by a licensed electrician.
• Regular inspections of labeling and wiring connections help maintain reliable protection.
• Keep spare MMKT800MC3 units on hand for quick field replacements in critical power feeds.