In summary, the Siemens 3VA1340-4EF42-0AA0 is a 400 A, 4-pole molded case circuit breaker from the SENTRON 3VA1 series, featuring TM240 thermal-magnetic protection, 36 kA breaking capacity, and unprotected neutral conductor. Built for line protection in demanding environments, it combines adjustable protection, durability, and reliable performance, making it a robust choice for industrial and commercial power distribution systems.
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3VA1340-4EF42-0AA0
circuit breaker 3VA1 IEC Frame 400 breaking capacity class S Icu=36 kA @ 415 V 4-pole, line protection TM240, ATAM, In=400 A overload protection Ir=280 A…400 A short-circuit protection Ii=5…10 x In N conductor unprotected nut keeper kit
- Stock status:
- Call for availability
- Manufacturer:
- Siemens
- Product code:
- 3VA1340-4EF42-0AA0
Main documents
- Product datasheet
- Instruction sheet
- Catalogue
Related products
| Product | |
| Article Number (Market Facing Number) | 3VA1340-4EF42-0AA0 |
| 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 | 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 | 6.334 kg |
Product Description
Product Overview
Product Name: 3VA1 Molded Case Circuit Breaker
Product Code: 3VA1340-4EF42-0AA0
Brand: Siemens SENTRON
Product Family: 3VA Molded Case Circuit Breakers up to 1600 A (IEC Standard)
Design: Line protection
Overcurrent Release Type: TM240 (Thermal-Magnetic)
Protection Function: LI (Overload and Instantaneous Short-Circuit)
Number of Poles: 4P (Neutral conductor unprotected)
Life Cycle Status: Active Product
EAN: 4042948809594
UPC: 804766889363
Commodity Code: 85362090
Technical Specifications
Frame Size: 400
Rated Current (In): 400 A
Overload Protection (Ir): Adjustable from 280 A to 400 A
Short-Circuit Protection (Ii): Adjustable from 5×In to 10×In
Breaking Capacity Class: S
Ultimate Short-Circuit Breaking Capacity (Icu): 36 kA @ 415 V AC
Rated Insulation Voltage (Ui): 800 V
Rated Operational Voltage (Ue): 690 V AC
Rated DC Voltage (Ud): 600 V DC
Maximum Power Loss: 92.1 W
Power Loss per Pole (at 400 A): 30.7 W
Mechanical Durability: 20,000 operations
Electrical Endurance:
6,000 operations at AC-1 / 380–415 V
4,200 operations at AC-1 / 690 V
Neutral Conductor: Unprotected
Mounting Type: Fixed mounting
Ground-Fault Monitoring: Not included
Communication Function: Not available
Net Weight: 6.334 kg
Performance & Features
Thermal-magnetic trip unit (TM240) — ensures dependable protection against overload and short-circuit faults.
Breaking capacity of 36 kA @ 415 V — delivers high fault-clearing performance for industrial-grade applications.
Adjustable protection settings — enables precise configuration of trip parameters for various load conditions.
4-pole version with unprotected neutral conductor — ideal for three-phase systems requiring neutral continuity.
MCCB design — compact, robust, and easy to integrate into switchboards and electrical panels.
Long mechanical and electrical lifespan — up to 20,000 mechanical and 6,000 electrical operations, ensuring reliability over years of use.
No communication or measurement function, providing a straightforward, stand-alone protection device.
Includes nut keeper kit for simplified and secure installation.
Applications
Line and feeder protection in low-voltage power systems
Distribution panels and switchgear assemblies
Cable and equipment protection in industrial and commercial buildings
Ideal for three-phase systems where neutral conductor remains unprotected
Applications requiring adjustable overload and short-circuit protection without digital communication
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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