In summary, the Siemens 3VA1450-5EF42-0AA0 is a 500 A, 4-pole MCCB with TM240 LI protection and 55 kA breaking capacity, offering robust, adjustable, and reliable line protection for industrial and commercial electrical systems.
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3VA1450-5EF42-0AA0
circuit breaker 3VA1 IEC Frame 630 breaking capacity class M Icu=55 kA @ 415 V 4-pole, line protection TM240, ATAM, In=500 A overload protection Ir=350 A…500 A short-circuit protection Ii=5…10 x In N conductor unprotected nut keeper kit
- Stock status:
- Call for availability
- Manufacturer:
- Siemens
- Product code:
- 3VA1450-5EF42-0AA0
Main documents
- Product datasheet
- Instruction sheet
- Catalogue
Related products
| Product | |
| Article Number (Market Facing Number) | 3VA1450-5EF42-0AA0 |
| 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 | 600 V |
| operating voltage / at AC / rated value | 690 V |
| power loss [W] / maximum | 122.7 W |
| power loss [W] / for rated value of the current / at AC / in hot operating state / per pole | 40.9 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 | 6.43 kg |
Product Description
Product Overview
Product Name: 3VA1 Circuit Breaker
Product Code: 3VA1450-5EF42-0AA0
Brand: Siemens SENTRON
Product Family: 3VA Molded Case Circuit Breakers up to 1600 A (IEC)
Design: Line protection
Device Type: MCCB with thermal-magnetic trip unit (TM240)
Number of Poles: 4P (Neutral Unprotected)
Trip / Release Unit: TM240
Protection Function: LI (Overload & Short-Circuit)
Life Cycle Status: Active Product
EAN: 4042948809693
UPC: 804766889752
Commodity Code: 85362090
Technical Specifications
Frame Size: 630 A
Rated Current (In): 500 A
Adjustable Overload Protection (Ir): 350 A … 500 A
Adjustable Short-Circuit Protection (Ii): 5 … 10 × In
Breaking Capacity (Icu): 55 kA @ 415 V AC (Class M)
Rated Operational Voltage (Ue): 690 V AC
Rated DC Voltage (Ud): 600 V DC
Rated Insulation Voltage (Ui): 800 V
Maximum Power Loss: 122.7 W
Power Loss per Pole (hot state): 40.9 W
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 upgradable / not short-circuit & overload proof
Ground-Fault Monitoring: Not included
Communication Function: No
Measurement Function: No
Net Weight: 6.43 kg
Performance & Features
55 kA breaking capacity at 415 V (Class M) ensures strong short-circuit protection for demanding installations.
Thermal-magnetic TM240 release provides accurate overload and short-circuit protection.
4-pole design with unprotected neutral suitable for systems without neutral monitoring.
Adjustable Ir and Ii settings enable coordination with upstream and downstream devices.
High endurance — up to 20,000 mechanical and 4,000 electrical operations at 415 V.
Rugged MCCB construction compatible with 3VA1 accessories.
Supplied with nut keeper kit for easy and secure installation.
IEC-compliant for global use.
Applications
Line and feeder protection in industrial and commercial power distribution
Protection of machinery, motors, and auxiliary circuits
Main or sub-circuit protection in switchboards and control panels
Suitable for installations requiring 4-pole breakers with unprotected neutral
Ideal for medium fault-level environments needing 55 kA short-circuit capacity
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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