The Siemens 3WT8125-6UP34-5AB2 is a SENTRON 3WT8 series Air Circuit Breaker (ACB) used in low-voltage high-current power distribution systems. It is designed for main incomer and feeder protection in PCC, MCC, transformer and generator distribution panels.
This model belongs to the 1250A, 4-pole withdrawable ACB category, and provides protection against overload, short-circuit, and earth fault conditions.
• Siemens SENTRON 3WT8 series ACB
• Part Number: 3WT8125-6UP34-5AB2
• 4 Pole (3P + Neutral)
• Rated current: 1250A
• Breaking capacity: 66kA @ 500V AC
• Withdrawable (draw-out) type for safe maintenance
• Electronic trip unit: ETU37WT LSING (variant dependent)
• Protection functions: Overload, Short circuit, Earth fault
• Motorized + manual spring charging mechanism
• Mechanical lockout + trip indication system
• Auxiliary contacts & shunt release options (configuration dependent)
• IEC 60947-2 compliant design
• High short-time withstand strength for industrial reliability
| Parameter | Specification |
|---|---|
| Product Series | Siemens SENTRON 3WT8 |
| Part Number | 3WT8125-6UP34-5AB2 |
| Product Type | Air Circuit Breaker (ACB) |
| Number of Poles | 4 Pole |
| Rated Current | 1250A |
| Rated Voltage | Up to 500V AC |
| Breaking Capacity (Icu) | 66kA |
| 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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