In summary, the Siemens 3VA1440-6MH32-0AA0 is a 400 A, 3-pole MCCB from the SENTRON 3VA1 series, designed for starter protection with a TM120M short-circuit trip unit. Featuring 70 kA breaking capacity, robust MCCB construction, and long mechanical and electrical endurance, it delivers dependable protection for industrial and commercial power distribution systems.
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3VA1440-6MH32-0AA0
circuit breaker 3VA1 IEC Frame 630 breaking capacity class H Icu=70 kA @ 415 V 3-pole, starter protection TM120M, AM, In=400 A without overload protection short-circuit protection Ii=6…12 x In nut keeper kit
- Stock status:
- Call for availability
- Manufacturer:
- Siemens
- Product code:
- 3VA1440-6MH32-0AA0
Main documents
- Product datasheet
- Instruction sheet
- Catalogue
Related products
| Product | |
| Article Number (Market Facing Number) | 3VA1440-6MH32-0AA0 |
| 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 | |
| operating voltage / at AC / rated value | 690 V |
| power loss [W] / maximum | 76.8 W |
| power loss [W] / for rated value of the current / at AC / in hot operating state / per pole | 25.6 W |
| mechanical service life (operating cycles) / typical | 20 000 |
| electrical endurance (operating cycles) / at AC-1 / at 380/415 V | 4 000 |
| electrical endurance (operating cycles) / at AC-1 / at 690 V | 3 000 |
| 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 | 4.913 kg |
Product Description
Product Overview
Product Name: 3VA1 Circuit Breaker
Product Code: 3VA1440-6MH32-0AA0
Brand: Siemens SENTRON
Product Family: 3VA Molded Case Circuit Breakers up to 1600 A (IEC Standard)
Design: Starter protection
Device Type: MCCB with thermal-magnetic trip unit (TM120M)
Number of Poles: 3P
Trip / Release Unit: TM120M (Thermal-Magnetic)
Protection Function: I (Short-Circuit)
Life Cycle Status: Active Product
EAN: 4042948827604
UPC: 804766889622
Commodity Code: 85362090
Technical Specifications
Frame Size: 630 A
Rated Current (In): 400 A
Overload Protection: Not available
Adjustable Short-Circuit Protection (Ii): 6 … 12 × In
Breaking Capacity (Icu): 70 kA @ 415 V AC
Rated Operational Voltage (Ue): 690 V AC
Rated Insulation Voltage (Ui): 800 V
Maximum Power Loss: 76.8 W
Power Loss per Pole: 25.6 W (at rated current, hot state)
Mechanical Durability: 20,000 operations
Electrical Endurance (AC-1 380/415 V): 4,000 operations
Electrical Endurance (AC-1 690 V): 3,000 operations
Neutral Conductor: Not retrofittable
Ground-Fault Monitoring: Not included
Communication Function: Not available
Measurement Function: Not available
Mounting Type: Fixed mounting
Net Weight: 4.913 kg
Performance & Features
High breaking capacity (70 kA @ 415 V) ensures safe interruption of short-circuit currents.
Thermal-magnetic trip unit (TM120M) provides reliable short-circuit protection.
No overload protection — designed specifically for starter and short-circuit protection applications.
MCCB construction offers mechanical strength, compact dimensions, and compatibility with 3VA1 accessories.
Extended endurance — up to 20,000 mechanical and 4,000 electrical operations at rated conditions.
Includes nut keeper kit for secure and convenient installation.
Complies with IEC standards, suitable for industrial installations.
Applications
Motor starter protection in industrial plants
Short-circuit protection for feeders and sub-circuits
Industrial switchboards and control panels
Suitable for circuits requiring starter-only protection without overload functions
Ideal for machinery, motors, and auxiliary systems requiring reliable short-circuit interruption
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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