The Siemens 3WT8105-6UA34-5AB2 is a SENTRON 3WT8 withdrawable Air Circuit Breaker (ACB) designed for high-current low-voltage power distribution and protection applications. This configuration 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. It has a specified ultimate short-circuit breaking capacity (Icu) of 66 kA at 500 V AC. The exact product data identifies this MLFB as a withdrawable breaker with an ETU37WT LSING electronic overcurrent release and guide frame.
The breaker uses a withdrawable construction with a guide frame, making it suitable for switchboards where inspection, isolation, servicing and controlled breaker withdrawal are important. The configuration is designed for professional low-voltage power-distribution applications such as main distribution boards, high-current feeders and industrial switchboards.
The ETU37WT LSING electronic overcurrent release with display provides electronic protection functionality for the configured breaker. The available product data specifies overload, short-circuit and earth-fault protection functions, with the final protection settings selected according to the electrical system and coordination requirements.
The breaker has a motorized/manual operating mechanism with memory and electrical and mechanical activation. The specified motor and electrical charging supply is 220–240 V AC / 220–250 V DC, while the activation solenoid is rated 220–250 V DC. The configuration also includes a shunt release F/F2 rated 220–240 V AC / 220–250 V DC.
For switchgear status and controlled operation, the 3WT8105-6UA34-5AB2 includes a mechanical lockout device, tripped signalling switch, tripped indicators and 2 NC + 2 NO auxiliary current switches. A 2-piece shutter with sealing cap and door sealing frame are also specified for the configuration.
| Specification | Details |
|---|---|
| Product | Siemens 3WT8105-6UA34-5AB2 |
| 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 Breaking Capacity (Icu) | 66 kA at 500 V AC |
| Short-Time Withstand Current (Icw) | 66 kA / 1 s at 500 V |
| Overcurrent Release | ETU37WT LSING with display |
| Operating Mechanism | Motorized/manual with memory |
| Draw-Out Type | Withdrawable / Electrical Draw-Out |
| Motor & Charging Supply | 220–240 V AC / 220–250 V DC |
| Activation Solenoid | 220–250 V DC |
| Shunt Release | F/F2, 220–240 V AC / 220–250 V DC |
| Auxiliary Current Switch | 2 NC + 2 NO |
| Guide Frame | Included |
| Mechanical Lockout | Included |
| Tripped Signalling Switch | Included |
| Tripped Indicators | Included |
| Shutter | 2-piece shutter with sealing cap |
| Door Sealing Frame | Included |
The Siemens 3WT8 catalogue lists the relevant Size 1, 1000 A, 4-pole withdrawable family with 66 kA Icu and 66 kA Icw at 500 V for the applicable breaking-capacity configuration.
Siemens 3WT8105-6UA34-5AB2
SENTRON 3WT8 Air Circuit Breaker
1000 A rated current
4-pole (4P) configuration
Size 1
Withdrawable design with guide frame
Rated for applications up to 500 V AC
50/60 Hz AC operation
66 kA Icu at 500 V AC
66 kA short-time withstand current for 1 s
ETU37WT LSING electronic overcurrent release with display
Overload, short-circuit and earth-fault protection
Motorized/manual operating mechanism with memory
Motor and electrical charging: 220–240 V AC / 220–250 V DC
Activation solenoid: 220–250 V DC
Shunt release F/F2
Mechanical lockout device
Tripped signalling switch
Tripped indicators
Auxiliary current switch 2 NC + 2 NO
2-piece shutter with sealing cap
Door sealing frame
Designed for high-capacity low-voltage power distribution
The Siemens 3WT8105-6UA34-5AB2 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 main 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 3WT8105-6UA34-5AB2 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 relevant Siemens 3WT8 catalogue data also lists 66 kA short-time withstand current at 500 V for 1 second for this breaking-capacity family.
The 4-pole construction provides coordinated protection and switching for compatible four-pole AC systems. It is suitable where the electrical distribution design requires four-pole circuit interruption.
The withdrawable design with guide frame provides operational flexibility for maintenance and inspection. The breaker can be withdrawn according to the prescribed switchgear operating procedure, supporting servicing and controlled isolation without treating the breaker as a permanently fixed assembly.
The ETU37WT LSING electronic overcurrent release with display provides electronic protection functions for overload, short-circuit and earth-fault conditions. This supports more controlled protection coordination in high-capacity electrical distribution systems.
The motorized/manual operating mechanism with memory allows the breaker to be operated through suitable manual and electrical control arrangements. The specified charging supply supports 220–240 V AC or 220–250 V DC control systems.
The mechanical lockout device supports controlled breaker operation during defined isolation and maintenance procedures. The tripped signalling switch and tripped indicators provide useful breaker-status information for operators and maintenance personnel.
The 2 NC + 2 NO auxiliary current-switch arrangement supports status monitoring and control-system integration. The shutter and door sealing frame additionally support controlled access to the switchgear compartment.
The Siemens SENTRON 3WT8 series is intended for professional low-voltage power distribution, making this ACB suitable 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 settings, control voltages, guide-frame compatibility, busbar arrangement, prospective fault current, switchboard dimensions and coordination with upstream/downstream protection.
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 3WT8105-6UA34-5AB2 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 3WT8105-6UA34-5AB2?
It is a Siemens SENTRON 3WT8 withdrawable Air Circuit Breaker with a 4-pole configuration, Size 1 and 1000 A rated current.
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 short-time withstand current?
The relevant 3WT8 catalogue configuration specifies 66 kA for 1 second at 500 V.
5. What is the rated voltage?
The breaker is specified for applications up to 500 V AC at 50/60 Hz.
6. Is this circuit breaker withdrawable?
Yes. It is a withdrawable circuit breaker with guide frame.
7. What type of trip unit does it use?
It uses the ETU37WT LSING electronic overcurrent release with display, with the configured overload, short-circuit and earth-fault protection functions.
8. What auxiliary and safety features are included?
The configuration includes a mechanical lockout device, tripped signalling switch, tripped indicators, 2 NC + 2 NO auxiliary current switches, 2-piece shutter with sealing cap and door sealing frame.
| Parameter | Specification |
|---|---|
| Product Series | Siemens SENTRON 3WT |
| Part Number | 3WT8105-6UA34-5AB2 |
| Product Type | Air Circuit Breaker (ACB) |
| Number of Poles | 4 Pole |
| Rated Current (In) | 1000A |
| Frame Size | Size 1 |
| Trip Unit Type | ETU37WT Electronic |
| Protection Functions | LSING (O/L, S/C, I, E/F) |
| Breaking Capacity (Icu) | 66kA at 500V AC |
| Rated Operational Voltage (Ue) | Up to 500V AC |
| Rated Insulation Voltage (Ui) | 1000V |
| Frequency | 50/60 Hz |
| Operating Mechanism | Stored-energy mechanism |
| Mounting Type | Withdrawable / Draw-out |
| Standard Compliance | IEC 60947-2 |
| Application | PCC, MCC, LT Panels, Transformers, Generators |
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