The Siemens 3WT8125-6UA34-5AB2 is a SENTRON 3WT8 series Air Circuit Breaker (ACB) designed for high-capacity low-voltage power distribution systems. It is used as a main incomer / feeder breaker in industrial installations to protect systems from overload, short circuit, and earth fault conditions.
This model belongs to the 1250A, 4-pole withdrawable ACB range and is commonly used in PCC panels, MCC panels, transformer incomers, and generator distribution systems.
• Siemens SENTRON 3WT8 series ACB
• Part Number: 3WT8125-6UA34-5AB2
• 4 Pole configuration (3P + Neutral)
• Rated current: 1250A
• Breaking capacity: 66kA @ 500V AC
• Withdrawable (draw-out) type for safe maintenance
• Advanced electronic protection unit: ETU37WT LSING
• Protection functions: Overload, Short circuit, Earth fault
• Motorized + manual spring charging mechanism
• Mechanical lockout and trip indication system
• Auxiliary contacts and shunt release options (variant dependent)
• IEC 60947-2 compliant design
• High short-time withstand capability for industrial reliability
| Parameter | Specification |
|---|---|
| Product Series | Siemens SENTRON 3WT8 |
| Part Number | 3WT8125-6UA34-5AB2 |
| Product Type | Air Circuit Breaker (ACB) |
| Number of Poles | 4 Pole |
| Rated Current | 1250A |
| Rated Voltage | Up to 500V AC |
| Breaking Capacity (Icu) | 66kA @ 500V |
| Protection Unit | ETU37WT LSING |
| Protection Functions | Overload, Short Circuit, Earth Fault |
| Type | Withdrawable / Draw-out |
| Frequency | 50/60 Hz |
| Mounting Type | Fixed base with draw-out mechanism |
| Standard | IEC 60947-2 |
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