MP320 - 20 Amp Circuit Breaker

MP320 - 20 Amp Circuit Breaker

The Siemens MP320 circuit breaker delivers dependable protection for both residential and commercial electrical systems. Designed to safeguard your load centers and feeder panels from overloads and shorts, this 3-pole, 240 V, 20 Amp breaker combines thermal and magnetic protection in a compact footprint. Its HACR certification ensures it’s suitable for heating, air conditioning, and refrigeration systems — making it a versatile choice whether you’re wiring a new home, upgrading an old panel, or adding circuits to a light‑industrial space.

Key Features and Benefits

• Dual Thermal‑Magnetic Protection: The MP320 guards against both prolonged overloads (thermal trips) and sudden short circuits (magnetic trips), helping prevent equipment damage and reducing fire risks.
• HACR Rated: Certified for use with heating, ventilation, air conditioning, and refrigeration equipment. This makes it ideal for HVAC circuits and other heavy‑duty applications in homes or light commercial settings.
• Space‑Saving Design: Its compact size allows for straightforward installation in standard load centers and existing electrical panels, making upgrades or retrofits much easier.
• Durable Construction: Engineered to deliver long‑lasting service under normal operating conditions, offering consistent performance over time.
• Three‑Pole, 240 V Configuration: Perfect for multi‑phase circuits or larger loads that require balanced power distribution across three phases.
  

Technical Specifications

• Series / Type: MP‑T miniature thermal‑magnetic breaker
  
• Voltage Rating: 240 V AC
  
• Amperage Rating: 20 Amp
  
• Poles: 3‑Pole
  
• Interrupt Rating: 10 kA (10,000 A)
  
• HACR Rated: Yes
  
• Operating Temperature: Up to 104 °F (40 °C)
  
• Net Weight: Approx. 0.860 lb
  
• Dimensions:
  • Height: 3.543 inches
  • Width: 12.598 inches
  • Depth: 3.15 inches

Material Compliance and Certifications

• Industry Standards: The MP320 meets industry‑standard safety and performance rules for residential and commercial circuit breakers. Its HACR rating confirms compatibility with HVAC and refrigeration systems. Built according to rigorous manufacturing standards, the breaker adheres to all necessary safety regulations — giving you confidence that it will meet building and electrical codes when properly installed.
  

Where It Works Best

• This circuit breaker is perfect for homeowners, electricians, and contractors working on new installations, panel upgrades, or retrofit projects in residential, commercial, or light‑industrial environments. Thanks to its HACR certification and 3‑pole 240 V configuration, it shines in HVAC circuits, multi‑phase service feeds, and other applications requiring reliable, code-compliant protection. If you’re wiring a new house, updating an old panel, or installing equipment that draws moderate to heavy power loads, the MP320 is an excellent go-to choice.