The Siemens 3WT8105-6UP34-5AB2 is a SENTRON 3WT8 withdrawable Air Circuit Breaker (ACB) designed for high-current low-voltage power distribution and protection applications. This configuration features a 4-pole construction, Size 1 frame and 1000 A rated current, with operation up to 500 V AC at 50/60 Hz and a specified 66 kA ultimate short-circuit breaking capacity (Icu) at 500 V AC. The exact product listing identifies this MLFB as an electrically withdrawable ACB with an ETU37WT LSING electronic overcurrent release.
The 3WT8105-6UP34-5AB2 is designed with an electrical draw-out mechanism and guide frame, making it suitable for switchboards where convenient isolation, inspection and maintenance of the breaker are important. The withdrawable configuration allows the breaker to be moved between its connected and withdrawn positions according to the applicable switchgear operating procedure.
The breaker incorporates the ETU37WT LSING electronic overcurrent release with display, supporting protection against overload, short-circuit and earth-fault conditions according to the configured settings. The exact protection settings should be selected and coordinated with the electrical system's protection study.
The configuration includes a motorized/manual operating mechanism with memory, electrical and mechanical activation, and a motor and electrical charging supply rated 220–240 V AC / 220–250 V DC. It also includes an activation solenoid rated 220–250 V DC.
For breaker control and protection, the MLFB includes a first auxiliary undervoltage release "R", F3 rated 380–415 V AC instantaneous, together with a second auxiliary shunt release "F", F2 rated 220–240 V AC / 220–250 V DC.
The product also includes 2 NC + 2 NO auxiliary current switches, a 2-piece shutter with sealing cap and a door sealing frame. These features support status monitoring, controlled switchgear access and integration into industrial power-distribution systems.
| Specification | Details |
|---|---|
| Product | Siemens 3WT8105-6UP34-5AB2 |
| Product Type | Withdrawable Air Circuit Breaker |
| Series | SENTRON 3WT8 |
| Configuration | 4-Pole |
| Frame Size | Size 1 |
| Rated Current (In) | 1000 A |
| Rated Voltage | Up to 500 V AC |
| Frequency | 50/60 Hz |
| Ultimate Breaking Capacity (Icu) | 66 kA at 500 V AC |
| Overcurrent Release | ETU37WT LSING with display |
| Operating Mechanism | Motorized/manual with memory |
| Draw-Out Type | Electrical Draw-Out |
| Guide Frame | Included |
| Motor/Charging Supply | 220–240 V AC / 220–250 V DC |
| Activation Solenoid | 220–250 V DC |
| 1st Auxiliary Release | Undervoltage release R, F3; 380–415 V AC instantaneous |
| 2nd Auxiliary Release | Shunt release F, F2; 220–240 V AC / 220–250 V DC |
| Auxiliary Current Switch | 2 NC + 2 NO |
| Safety/Status Features | Mechanical lockout, tripped signalling switch, tripped indicators |
| Shutter | 2-piece shutter with sealing cap |
| Door Sealing Frame | Included |
The exact configuration details above are taken from the product listing for 3WT8105-6UP34-5AB2.
Siemens 3WT8105-6UP34-5AB2
SENTRON 3WT8 Air Circuit Breaker
1000 A rated current
4-pole configuration
Size 1
Electrical withdrawable design
Guide frame
Rated for applications up to 500 V AC
50/60 Hz AC operation
66 kA Icu at 500 V AC
ETU37WT LSING electronic overcurrent release with display
Overload, short-circuit and earth-fault protection
Motorized/manual stored-energy operating mechanism
Mechanical lockout device
Tripped signalling switch
Tripped indicators
Undervoltage release R/F3, 380–415 V AC instantaneous
Shunt release F/F2, 220–240 V AC / 220–250 V DC
Auxiliary current switch 2 NC + 2 NO
2-piece shutter with sealing cap
Door sealing frame
Suitable for high-capacity low-voltage power distribution
The Siemens 3WT8105-6UP34-5AB2 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 power distribution
Infrastructure power systems
Electrical distribution sections
OEM switchgear assemblies
Critical power-distribution systems
High-capacity electrical panels
Industrial electrical switchboards
High-current three-phase and four-pole distribution systems
The 1000 A rated current makes the 3WT8105-6UP34-5AB2 suitable for high-capacity low-voltage power-distribution applications where substantial electrical loads require dependable switching and protection.
The 66 kA Icu at 500 V AC provides high short-circuit interruption capability for suitable high-fault-level installations. The prospective short-circuit current at the installation point should always be verified against the breaker rating 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 as part of the electrical distribution design.
The electrical withdrawable construction with guide frame provides operational flexibility for switchboards where breaker inspection, isolation, servicing and replacement are important. It allows the breaker to be withdrawn according to the applicable switchgear operating procedure.
The ETU37WT LSING electronic overcurrent release with display provides electronic protection and monitoring for the configured breaker. This supports coordinated protection against overload, short circuit and earth-fault conditions.
The mechanical lockout device provides an additional operational safety function for controlled switching and maintenance procedures. The tripped signalling switch and tripped indicators provide useful status information for operators and maintenance personnel.
The undervoltage release R/F3 and shunt release F/F2 expand the breaker-control possibilities, allowing the ACB to be incorporated into suitable electrical interlocking, protection and remote-control schemes. Their control voltages should be verified before installation.
The 2 NC + 2 NO auxiliary current-switch arrangement supports breaker-status monitoring and control-system integration. The shutter with sealing cap and door sealing frame also support controlled switchgear access.
The Siemens SENTRON 3WT8 platform is suitable for professional low-voltage power-distribution systems, making this ACB 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, protection-release configuration, control voltages, guide-frame compatibility, busbar arrangement, prospective fault current, protection settings and switchboard dimensions.
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 3WT8105-6UP34-5AB2 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 3WT8105-6UP34-5AB2?
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 rated voltage?
The breaker is specified for applications up to 500 V AC at 50/60 Hz.
5. Is this circuit breaker withdrawable?
Yes. The configuration is an electrical draw-out circuit breaker with guide frame.
6. What type of trip unit does it use?
It uses the ETU37WT LSING electronic overcurrent release with display, supporting the configured overload, short-circuit and earth-fault protection functions.
7. What auxiliary releases are included?
The configuration includes an undervoltage release R/F3 rated 380–415 V AC instantaneous and a shunt release F/F2 rated 220–240 V AC / 220–250 V DC.
8. What safety and indication features are included?
The configuration includes a mechanical lockout device, tripped signalling switch, tripped indicators, guide frame, 2 NC + 2 NO auxiliary current switches, shutter with sealing cap and door sealing frame.
| Parameter | Specification |
|---|---|
| Product Series | Siemens SENTRON 3WT8 |
| Part Number | 3WT8105-6UP34-5AB2 |
| 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 (Overload, Short, Instantaneous, Earth Fault) |
| 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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