The Siemens 3WJ1112-2AF52-4DA4 is a high-performance SENTRON 3WJ Air Circuit Breaker (ACB) designed for reliable protection, switching, and isolation of low-voltage power distribution systems. This IEC 60947-2 compliant Air Circuit Breaker features a 3-pole configuration, rated current of 1250A, and advanced ETU electronic trip unit with LSIG protection functions for overload, short-circuit, instantaneous, and ground fault protection. Built for industrial and commercial electrical installations, the breaker ensures superior operational safety, high breaking capacity, and dependable performance in critical power distribution applications such as PCC panels, MCC panels, substations, and industrial power networks.
• Siemens SENTRON 3WJ Series Air Circuit Breaker (ACB)
• Part Number: 3WJ1112-2AF52-4DA4
• Rated Current: 1250A
• 3 Pole Configuration
• Fixed Mounted Design
• Advanced Electronic Trip Unit (ETU) with LSIG Protection
• Overload, Short-Circuit, Instantaneous & Ground Fault Protection
• High Breaking Capacity for Industrial Applications
• Reliable Load Switching and Isolation
• Suitable for Low Voltage Power Distribution Systems
• Manual and Motorized Operating Mechanism
• Auxiliary Contacts for Status Indication
• Rugged Industrial Construction
• Long Mechanical and Electrical Life
• Easy Installation and Maintenance
• Designed as per IEC 60947-2 Standards
• Ideal for PCC Panels, MCC Panels, Switchboards, and Industrial Power Systems
| Parameter | Specification |
|---|---|
| Product Series | Siemens SENTRON 3WJ |
| Part Number | 3WJ1112-2AF52-4DA4 |
| Product Type | Air Circuit Breaker (ACB) |
| Number of Poles | 3 Pole |
| Rated Current | 1250A |
| Rated Operational Voltage | Up to 440V AC |
| Frequency | 50/60 Hz |
| Mounting Type | Fixed Mounted |
| Frame Size | Size 1 |
| Trip Unit | Electronic Trip Unit (ETU) |
| Protection Functions | LSIG (Overload, Short-Circuit, Instantaneous, Ground Fault) |
| Breaking Capacity | 50kA at 440V AC |
| Insulation Voltage | 1000V |
| Operating Mechanism | Manual / Motorized |
| Auxiliary Contacts | 2NO + 2NC |
| Switching Function | Protection, Switching & Isolation |
| Terminal Connection | Rear Horizontal Connection |
| Standard Compliance | IEC 60947-2 |
| Degree of Protection | IP41 (with sealing frame) |
| Application | PCC Panels, MCC Panels, LT Distribution Systems, Industrial Power Networks |
| Country of Origin | India / Siemens Manufacturing Standards |
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