Siemens MP220ST 20A 2-Pole 240 V Circuit Breaker

Engineered by Siemens, the MP220ST is a 20 Amp, 2-pole, 240-volt circuit breaker designed to protect high-demand 240V circuits with dependable, rapid interruption when faults occur. Identified by the part number MP220ST, this breaker is a core component of Siemens' MP-series line, built for reliability in both home and light commercial electrical panels.

Two-pole protection that keeps both hot legs in sync

With a two-pole design, this breaker trips both hot lines together, ensuring safe disconnection and minimizing the risk of energizing a circuit mid-trip. The 20A rating is precise for typical 240V branch loads, balancing protection with the ability to handle inrush and startup surges common to compressors, pumps, and other 240V gear.

Ideal use scenarios

• Protects 240V circuits such as air conditioning units, heat pumps, and other HVAC components.
• Safeguards 240V appliances like water heaters and electric clothes dryers.
• Suitable for residential or light commercial panels requiring reliable 240V, 2-pole protection.
• Simple replacement part in Siemens MP-series panels for straightforward upgrades and maintenance.

Key specifications

• Part Number: MP220ST
• Current rating: 20 A
• Poles: 2
• Voltage rating: 240 V

Designed to integrate with Siemens MP-series breakers and compatible panels, the MP220ST offers a dependable path for upgrading or stocking spare breakers. When installing, ensure panel compatibility with MP-series devices and verify that the connected conductors and load remain within the 20A protection threshold for optimal safety and performance.