3VA4120-4ED54-0AA0 - 20 Amp Circuit Breaker

3VA4120-4ED54-0AA0  -  20 Amp Circuit Breaker

Ensure the safety and reliability of your electrical system with the Siemens 3VA4120-4ED54-0AA0 molded-case circuit breaker. This precision 20 A device combines compact form with high performance to protect circuits from overloads and short circuits. With its factory-installed TM210 thermal-magnetic trip unit (fixed Ir/Ii settings), you can install it with confidence—it’s ready to go and engineered for dependable operation from day one. The unit’s moderate interrupting capacity and slim footprint make it ideal for installations in tight panels and power distribution setups where space is at a premium.

Key Features and Benefits

• Single-Pole, 20 A Protection: Perfect for branch circuits such as lighting, receptacles, and small motor loads without overcomplicating your design.
• Factory Pre-installed TM210 Trip Unit: Fixed settings for overload and short-circuit response reduce the need for manual configuration.
• High Interrupting Capacity: Rated for 25 kA at 277 VAC to handle fault currents safely on many low-voltage systems.
• Compact Form Factor: With a height of approximately 5.09 inches (129.4 mm) and a width of 2.0 inches (50.8 mm), it fits neatly even in densely populated panels.
• Load-side Lugs Installed: Simplifies wiring and speeds installation by eliminating the need for additional hardware on the load side.

Technical Specifications

• Poles: 1 (in a 2-pole body)
• Rated Current (In): 20 A
• Interrupting Capacity: 25 kA @ 277 VAC (UL rating)
• Overload / Short-circuit Protection: Ir = 20 A (fixed), Ii = 15 × In (fixed)
• Dimensions (H × W × D): ~5.09″ × 2.0″ × 2.96″ (129.4 mm × 50.8 mm × 75.1 mm)
• Weight: ~0.426 kg (≈0.94 lb)
• Electrical Endurance: 8,000 cycles at 480 V
• Mechanical Life: ~15,000 operating cycles

Material Compliance and Certifications

• UL Listed (Type 3VA Molded Case Circuit Breaker): Certified under UL 489 for safe use in North American applications.
• Siemens Engineering Standards: Constructed under Siemens’ low-voltage engineering standards, meeting industry norms for reliability and safety.
• Environmental Compliance: Complies with environmental and directive requirements (e.g., RoHS) as specified in Siemens’ product documentation.

Where It Works Best

• The 3VA4120-4ED54-0AA0 excels in commercial, industrial, and residential environments alike. Use it to protect lighting banks, low-power machines, HVAC circuits, or receptacle circuits rated at 20 A. Its slim width makes it particularly valuable where panel space is limited or in retrofits. Thanks to its Siemens build quality, it delivers consistent and long-lasting protection even in demanding installations.