The Siemens 3WT8105-6AG08-5BC2 is a SENTRON 3WT8 withdrawable Air Circuit Breaker (ACB) intended for high-current low-voltage power distribution and protection applications. Based on the configuration supplied, this breaker is a 4-pole, Size 1 circuit breaker with a rated current of 1000 A, suitable for operation up to 500 V AC at 50/60 Hz, with a specified ultimate short-circuit breaking capacity (Icu) of 66 kA at 500 V AC.
The 3WT8105-6AG08-5BC2 is specified as a withdrawable circuit breaker with guide frame, making it suitable for switchboards where breaker isolation, inspection, maintenance and replacement are important. The withdrawable design allows the breaker to be moved between its connected and withdrawn positions according to the applicable switchgear operating procedure.
The 1000 A rated current makes this ACB suitable for high-capacity power-distribution applications including main incomers, feeders, generator distribution systems and industrial switchboards. Correct selection should consider the connected load, busbar and conductor ratings, protection coordination and prospective short-circuit current.
The specified 66 kA Icu at 500 V AC provides substantial short-circuit interruption capability for suitable high-fault-level installations. The actual prospective short-circuit current at the installation point should always be checked before final selection.
The supplied configuration also includes a mechanical lockout device, tripped signalling switch and tripped indicators. These features support controlled breaker operation, status identification and maintenance procedures within professional switchgear systems.
I could not locate a publicly indexed Siemens document for the exact MLFB 3WT8105-6AG08-5BC2 during verification. Therefore, I have limited the MLFB-specific information to the ratings and accessories stated in your supplied product description and have not assumed additional release, trip-unit or control-voltage details that are not independently verified.
| Specification | Details |
|---|---|
| Product | Siemens 3WT8105-6AG08-5BC2 |
| Product Type | Withdrawable Air Circuit Breaker |
| Series | SENTRON 3WT8 |
| Configuration | 4-Pole |
| Frame Size | Size 1 |
| Rated Current (In) | 1000 A |
| Rated Operating Voltage | Up to 500 V AC |
| Frequency | 50/60 Hz |
| Ultimate Short-Circuit Breaking Capacity (Icu) | 66 kA at 500 V AC |
| Construction | Withdrawable |
| Guide Frame | Included as specified |
| Mechanical Lockout Device | Included as specified |
| Tripped Signalling Switch | Included as specified |
| Tripped Indicators | Included as specified |
| Application | High-current low-voltage power distribution |
The Siemens 3WT8 technical catalogue confirms that the relevant Size 1, 1000 A family is available with high short-circuit interruption capability, including 66 kA Icu at 500 V AC.
Siemens 3WT8105-6AG08-5BC2
SENTRON 3WT8 Air Circuit Breaker
1000 A rated current
4-pole (4P) configuration
Size 1
Withdrawable circuit-breaker construction
Guide frame
Suitable for applications up to 500 V AC
50/60 Hz AC operation
66 kA Icu at 500 V AC
Mechanical lockout device
Tripped signalling switch
Tripped indicators
Designed for high-capacity electrical distribution
Suitable for industrial switchboards
Suitable for main incomer and feeder applications
Suitable for professional low-voltage power protection
The Siemens 3WT8105-6AG08-5BC2 1000A 4-pole withdrawable ACB can be considered for:
Main low-voltage switchboards
Main incomer applications
Industrial power distribution
High-current feeder protection
Generator distribution systems
Large manufacturing plants
Process industries
Commercial building power distribution
Infrastructure power systems
Industrial electrical switchboards
OEM switchgear assemblies
Critical power-distribution systems
High-capacity electrical panels
Power-distribution sections
Industrial and commercial electrical infrastructure
The 1000 A rated current makes the 3WT8105-6AG08-5BC2 suitable for high-capacity low-voltage power-distribution systems where substantial electrical loads require reliable switching and protection.
The 66 kA Icu at 500 V AC provides high short-circuit interruption capability for suitable high-fault-level installations. The actual prospective short-circuit current should always be evaluated at the installation point to confirm that the breaker is adequately rated.
The 4-pole construction provides coordinated protection and switching for compatible four-pole AC systems. This can be useful where four-pole interruption is required as part of the electrical distribution design.
The withdrawable construction with guide frame provides operational flexibility for switchboard maintenance and servicing. The breaker can be withdrawn according to the prescribed operating procedure, supporting controlled isolation and inspection.
The mechanical lockout device supports controlled breaker operation during defined maintenance and electrical isolation procedures.
The tripped signalling switch and tripped indicators provide useful status information for operators and maintenance personnel. These features can assist in identifying a tripped condition and support troubleshooting during system restoration.
The Siemens SENTRON 3WT8 platform is intended for professional low-voltage power-distribution applications, making this breaker relevant for OEMs, EPC contractors, panel builders, electrical contractors, system integrators and industrial maintenance teams.
The Siemens 1000A 4P 66kA withdrawable ACB can be considered for suitable projects across Faridabad, Delhi NCR, Noida, Gurgaon/Gurugram, Ghaziabad, Punjab, Mumbai, Pune, Ahmedabad, Hyderabad, Bengaluru/Bangalore, Chennai, Kolkata, Jaipur, Chandigarh, Ludhiana and other major industrial and commercial locations across India.
Before installation or replacement, verify the complete MLFB configuration, protection-release details, control voltage, guide-frame compatibility, busbar arrangement, prospective fault current, switchboard dimensions and protection coordination.
SB Smart supplies Siemens ACBs, circuit breakers, switchgear and industrial electrical products for OEMs, EPC contractors, panel builders, electrical contractors, system integrators and industrial maintenance teams across India.
The Siemens 3WT8105-6AG08-5BC2 1000A 4-pole withdrawable ACB is suitable for customers looking for high-capacity Siemens circuit protection for main distribution boards, industrial switchboards, high-current feeders, generator systems and infrastructure power-distribution applications.
SB Smart supports Siemens product sourcing across Faridabad, Delhi NCR, Noida, Gurgaon/Gurugram, Mumbai, Pune, Ahmedabad, Hyderabad, Bengaluru/Bangalore, Chennai, Kolkata, Chandigarh, Ludhiana and other major Indian industrial markets.
1. What is Siemens 3WT8105-6AG08-5BC2?
It is a Siemens SENTRON 3WT8 withdrawable Air Circuit Breaker specified as a 4-pole, Size 1, 1000 A breaker.
2. What is the rated current?
The rated current is 1000 A.
3. What is the short-circuit breaking capacity?
The specified Icu is 66 kA at 500 V AC.
4. What is the rated voltage?
The stated application rating is up to 500 V AC at 50/60 Hz.
5. Is this circuit breaker withdrawable?
Yes. The supplied configuration specifies a withdrawable circuit breaker with guide frame.
6. How many poles does it have?
The specified configuration is 4-pole (4P).
7. What safety and indication features are included?
The supplied configuration includes a mechanical lockout device, tripped signalling switch and tripped indicators.
8. Where can this ACB be used?
It can be considered for suitable main switchboards, industrial power distribution, high-current feeders, generator systems, large electrical panels and infrastructure power-distribution applications.
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| Parameter | Specification |
|---|---|
| Product Series | Siemens SENTRON 3WT |
| Part Number | 3WT8105-6AG08-5BC2 |
| Product Type | Air Circuit Breaker (ACB) |
| Number of Poles | 4 Pole |
| Rated Current (In) | 1000A |
| Frame Size | Size 1 |
| Mounting Type | Withdrawable / Draw-Out |
| Trip Unit Type | ETU37WT Electronic Trip Unit |
| Protection Functions | LSING (Overload, Short Circuit, Instantaneous & Ground Fault) |
| Breaking Capacity (Icu) | 66kA at 500V AC |
| Rated Operational Voltage (Ue) | Up to 500V AC |
| Rated Insulation Voltage (Ui) | 1000V |
| Rated Impulse Withstand Voltage (Uimp) | 12kV |
| Frequency | 50/60 Hz |
| Operating Mechanism | Motorized / Manual Stored-Energy Mechanism |
| Short-Time Withstand Current (Icw) | 66kA |
| Auxiliary Indication | Tripped Signaling Switch |
| Safety Features | Mechanical Lockout Device |
| Protection Class | IP20 |
| Standard Compliance | IEC 60947-2 |
| Application | PCC Panels, MCC Panels, LT Distribution Systems, Generator Protection, Transformer Feeders |
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