In summary, the Siemens 3VA1340-6EF32-0AA0 is a 400 A, 3-pole MCCB from the SENTRON 3VA1 series, offering line protection with adjustable thermal-magnetic (TM240) release. With its 70 kA breaking capacity, robust design, and proven endurance, it delivers dependable protection and long-term reliability for industrial and commercial electrical systems.
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3VA1340-6EF32-0AA0
circuit breaker 3VA1 IEC Frame 400 breaking capacity class H Icu=70 kA @ 415 V 3-pole, line protection TM240, ATAM, In=400 A overload protection Ir=280 A…400 A short-circuit protection Ii=5…10 x In nut keeper kit
- Stock status:
- Call for availability
- Manufacturer:
- Siemens
- Product code:
- 3VA1340-6EF32-0AA0
Main documents
- Product datasheet
- Instruction sheet
- Catalogue
Related products
| Product | |
| Article Number (Market Facing Number) | 3VA1340-6EF32-0AA0 |
| Product Description | |
| Product family | 3VA Molded Case Circuit Breakers up to 1600 A, IEC |
| Product Lifecycle (PLM) | Active Product |
| Price data | |
| Region Specific PriceGroup / Headquarter Price Group | 12P / 53J |
| List Price | Show prices |
| Customer Price | Show prices |
| Surcharge for Raw Materials | None |
| Metal Factor | LOA—– |
| General technical data | |
| insulation voltage / rated value | 800 V |
| operating voltage / at DC / rated value | 500 V |
| operating voltage / at AC / rated value | 690 V |
| power loss [W] / maximum | 92.1 W |
| power loss [W] / for rated value of the current / at AC / in hot operating state / per pole | 30.7 W |
| mechanical service life (operating cycles) / typical | 20 000 |
| electrical endurance (operating cycles) / at AC-1 / at 380/415 V | 6 000 |
| electrical endurance (operating cycles) / at AC-1 / at 690 V | 4 200 |
| ground-fault monitoring version | Without |
| WEEE (2012/19/EU) Take-Back Obligation | Yes |
| REACH Art. 33 Duty to inform according to the current list of candidates | not available |
| Net Weight | 4.866 kg |
Product Description
Product Overview
Product Name: 3VA1 Circuit Breaker
Product Code: 3VA1340-6EF32-0AA0
Brand: Siemens SENTRON
Product Family: 3VA Molded Case Circuit Breakers up to 1600 A (IEC Standard)
Design: Line protection type
Device Type: MCCB with adjustable thermal-magnetic trip unit (TM240)
Number of Poles: 3P
Trip / Release Unit: TM240 (Thermal-Magnetic)
Protection Function: LI (Overload and Short-Circuit)
Life Cycle Status: Active Product
EAN: 4042948809556
UPC: 804766889493
Commodity Code: 85362090
Technical Specifications
Frame Size: 400 A
Rated Current (In): 400 A
Adjustable Overload Protection (Ir): 280 A … 400 A
Adjustable Short-Circuit Protection (Ii): 5 … 10 × In
Breaking Capacity (Icu): 70 kA @ 415 V AC
Rated Operational Voltage (Ue): 690 V AC
Rated Insulation Voltage (Ui): 800 V
Rated DC Voltage (Ud): 500 V DC
Rated Impulse Withstand Voltage (Uimp): 8 kV
Maximum Power Loss: 92.1 W
Power Loss per Pole: 30.7 W (at rated current, hot state)
Mechanical Durability: 20,000 operations
Electrical Endurance (AC-1 380/415 V): 6,000 operations
Electrical Endurance (AC-1 690 V): 4,200 operations
Mounting Type: Fixed mounting
Ground-Fault Monitoring: Not included
Communication Function: Not available
Measurement Function: Not available
Neutral Conductor Option: Not retrofittable
Net Weight: 4.866 kg
Performance & Features
High breaking capacity (70 kA @ 415 V) for superior protection against short circuits in critical installations.
Thermal-magnetic trip unit (TM240) provides precise and reliable overload and short-circuit protection.
Adjustable protection settings (Ir and Ii) allow flexible coordination with downstream devices.
MCCB design ensures mechanical robustness, compact form factor, and compatibility with 3VA1 accessories.
Excellent endurance — up to 20,000 mechanical and 6,000 electrical operations ensure long service life.
Complies with IEC standards, ensuring reliable performance and safety in global installations.
Includes nut keeper kit for secure and convenient installation.
Applications
Line and feeder protection in industrial power distribution
Main or sub-circuit protection for switchboards and control panels
Protection of machinery, motors, and auxiliary systems
Suitable for installation in commercial buildings, manufacturing plants, and energy systems
Ideal for circuits requiring high breaking capacity and adjustable overload/short-circuit protection
Summary
Frequently Asked Questions
What is the full form of MCCB in Siemens?
The full form of MCCB is Molded Case Circuit Breaker. A Siemens MCCB is designed to handle high electrical currents, often up to 1000A, making it highly reliable for industrial and commercial applications. These breakers provide advanced protection against overloads and short circuits, ensuring the safety of large electrical systems.
What is the difference between a Molded Case Circuit Breaker (MCB) and an MCCB?
The main difference between an MCB (Miniature Circuit Breaker) and an MCCB (Molded Case Circuit Breaker) lies in their capacity and applications.
✅MCBs are generally used for low-power applications, with a short-circuit breaking capacity of up to 10–15 kA. They are best suited for residential and light commercial systems.
✅ MCCBs, on the other hand, are designed for medium to high-power applications, with a breaking capacity ranging from 15 kA up to 100 kA and current ratings up to 1000A. This makes them ideal for industrial environments where large electrical loads need reliable protection.
Which company circuit breaker is best?
✅ In 2025, the leading circuit breaker brands include Siemens, Schneider Electric, ABB, Eaton, and Legrand. Among them, Siemens MCCBs—especially the Sentron 3VA series—stand out for safety, durability, and advanced circuit protection in industrial and commercial applications.
What breakers work in a Siemens box?
Siemens QT, QP, QAF, and QPF breakers fit Siemens panels. However, not all breakers are interchangeable—e.g., a QT breaker cannot replace a QP breaker. Always check compatibility before replacing.
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