The Siemens 3WT8121-6AA06-5AB2 is a SENTRON 3WT8 series Air Circuit Breaker (ACB) designed for high-capacity low-voltage power distribution systems. It provides reliable protection against overload, short-circuit, and earth fault conditions, making it suitable for critical industrial and infrastructure applications.
This model belongs to the 1250A frame size, 3-pole withdrawable ACB category, engineered for high breaking capacity and advanced protection using Siemens electronic trip technology.
• Siemens SENTRON 3WT8 series ACB
• Part Number: 3WT8121-6AA06-5AB2
• 3 Pole configuration
• Rated current: 1250A
• Breaking capacity: 66kA @ 500V AC
• Withdrawable (draw-out) type design
• Advanced electronic protection unit (ETU37WT LSING family)
• Protection: Overload, short circuit, and earth fault
• High short-time withstand capability (ICW up to 66kA/s class)
• Mechanical and electrical operation with stored-energy mechanism
• Modular construction for easy maintenance
• IEC 60947-2 compliant
• Designed for heavy-duty industrial power systems
| Parameter | Specification |
|---|---|
| Product Series | Siemens SENTRON 3WT8 |
| Part Number | 3WT8121-6AA06-5AB2 |
| Product Type | Air Circuit Breaker (ACB) |
| Number of Poles | 3 Pole |
| Rated Current (In) | 1250A |
| Rated Voltage | Up to 500V AC |
| Breaking Capacity (Icu) | 66kA @ 500V AC |
| Protection Unit | ETU37WT LSING |
| Protection Functions | Overload, Short Circuit, Earth Fault |
| Type | Withdrawable / Draw-out |
| Frequency | 50/60 Hz |
| Mounting Type | Fixed base with withdrawable breaker |
| Standard | IEC 60947-2 |
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