3VA5340-6EC31-0AA0 - 400 Amp Circuit Breaker

3VA5340-6EC31-0AA0  -  400 Amp Circuit Breaker

Get dependable circuit protection with the Siemens 3VA5340‑6EC31‑0AA0, a 400-amp molded case circuit breaker engineered to keep electrical systems safe and running smoothly. Built for commercial and industrial applications where strong performance matters, this breaker offers excellent overload and fault protection so you can minimize downtime and protect valuable equipment. Its 3‑pole design delivers balanced protection across all phases, and the fixed thermal‑magnetic trip unit means consistent operation without the need for adjustments or maintenance.

Designed to fit seamlessly into new installations or upgrades, this Siemens breaker supports a range of accessory options — from auxiliary contacts to trip indicators — giving you flexibility without complexity. Whether you’re specifying gear for power distribution panels or safeguarding motors and feeders, this breaker brings reliable operation and peace of mind to demanding electrical environments.

Key Features and Benefits

• 400 Amp Rating: Handles heavy current loads found in industrial or large commercial systems.
• 3‑Pole Protection: Ensures even defense across all three phases of power.
• Fixed Thermal‑Magnetic Trip: Permanently set for dependable overload and fault response with no field adjustments needed.
• High Interrupting Capability: Designed to interrupt up to 65 kA at 480 V, giving you strong short‑circuit defense.
• Accessory Support: Works with auxiliary switches, trip aids, and custom labeling for tailored system integration.

Technical Specifications

• Rated Current (In): 400 A
  
• Breaking Capacity: 65 kA @ 480 V
  
• Number of Poles: 3
  
• Trip Mechanism: Fixed Thermal‑Magnetic (TM230)
  
• Overload Protection (Ir): 400 A fixed
  
• Short‑Circuit Protection Range: 5–10×In fixed
  
• Weight: 4.749 kg
  
• Dimensions (L×W×H): 162 × 261 × 170 mm
  

Material Compliance and Certifications

• UL Listed: Meets stringent North American safety and performance standards.
• IEC‑Compatible: Built to internationally recognized electrical requirements.
• RoHS Compliant: Free of restricted substances for a safer supply chain and installation.
• Export Ready: Identified with ECCN 9N9999 and Commodity Code 85362090 for global distribution.

Where It Works Best

• This Siemens circuit breaker is ideal for electrical distribution systems in factories, commercial buildings, and critical infrastructure facilities. Use it to protect motor circuits, feeders, and panelboards where consistent trip performance and high current interruption are priorities. Panel builders, electrical contractors, and facilities teams will find this breaker a dependable choice when upgrading power systems or designing new installations that demand trusted protection.