The Siemens 3WT8105-6UA38-5AB2 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 unit with a rated current of 1000 A, suitable for 500 V AC at 50/60 Hz, with an ultimate short-circuit breaking capacity (Icu) of 66 kA at 500 V.
Siemens documentation confirms that the relevant 3WT8 Size 1, 1000 A family supports ratings up to 500 V AC and includes versions with 66 kA Icu at 500 V AC. The 3WT8 range also supports withdrawable designs with guide frames for suitable switchboard applications.
The 3WT8105-6UA38-5AB2 is specified as a withdrawable circuit breaker with guide frame, making it suitable for switchboards where controlled withdrawal, inspection and maintenance of the breaker are important. The withdrawable construction allows the ACB to be moved between its connected and withdrawn positions according to the prescribed switchgear operating procedure.
The 1000 A rated current makes this breaker suitable for high-capacity distribution systems, including main incomers, feeders, generator distribution and industrial switchboard applications. Correct coordination with busbars, conductors, upstream and downstream protective devices and the actual prospective short-circuit current is essential during selection.
The product description specifies a mechanical lockout device, tripped signalling switch and tripped indicators. These features support breaker-status indication and controlled switchgear operation during normal service and maintenance procedures.
The exact public Siemens catalog record for 3WT8105-6UA38-5AB2 was not located during verification, so I have not added unverified MLFB-specific details such as the exact ETU version or auxiliary-release voltages. The electrical ratings and general 3WT8 family information below are therefore limited to the specifications provided and details verified for the corresponding 1000 A Size 1 3WT8 family.
The Siemens 3WT8105-6UA38-5AB2 1000A 4-pole withdrawable ACB can be considered for:
The 1000 A rated current makes the 3WT8105-6UA38-5AB2 suitable for high-capacity low-voltage power-distribution applications 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. Siemens' 3WT8 technical data confirms 66 kA Icu at 500 V for the relevant Size 1, 1000 A family. The actual prospective short-circuit current should always be evaluated before final selection.
The 4-pole configuration provides coordinated protection and switching for compatible four-pole AC systems. This can be useful where four-pole circuit interruption is required by the electrical distribution design.
The withdrawable construction with guide frame provides greater flexibility for switchboard maintenance, inspection and breaker servicing. It allows the breaker to be withdrawn from the connected position according to the applicable manufacturer operating procedure.
The mechanical lockout device supports controlled breaker operation and can form part of defined electrical isolation and maintenance procedures.
The tripped signalling switch and tripped indicators provide useful breaker-status information for operators and maintenance personnel. These features can assist with fault identification and system restoration.
The SENTRON 3WT8 platform is intended for professional low-voltage power-distribution applications. The 3WT8105-6UA38-5AB2 can therefore be considered by OEMs, EPC contractors, panel builders, electrical contractors, system integrators and industrial maintenance teams.
For customers sourcing Siemens ACBs 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, this 1000 A withdrawable ACB can be considered for suitable switchgear applications.
Before installation or replacement, verify the complete MLFB configuration, protection-release details, guide-frame compatibility, busbar arrangement, prospective fault current, switchboard dimensions and control requirements.
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 3WT8105-6UA38-5AB2 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 3WT8105-6UA38-5AB2?
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 for the relevant 3WT8 Size 1, 1000 A family.
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.
| Parameter | Specification |
|---|---|
| Product Series | Siemens SENTRON 3WT8 |
| Part Number | 3WT8105-6UA34-5AB2 |
| Product Type | Air Circuit Breaker (ACB) |
| Number of Poles | 4 Pole |
| Rated Current (In) | 1000A |
| Frame Size | Size 1 |
| Breaking Capacity (Icu) | 66 kA @ 500V AC |
| Short-Time Withstand (Icw) | 66 kA/s |
| Trip Unit | ETU37WT (Microprocessor-based) |
| Protection | LSING |
| Rated Voltage (Ue) | Up to 500V AC |
| Insulation Voltage (Ui) | 1000V |
| Frequency | 50/60 Hz |
| Mounting Type | Withdrawable / Draw-out |
| Operating Mechanism | Manual + Motorized stored energy |
| Standard | IEC 60947-2 |
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