Siemens Switch 3LD2164-1TC51

Core Features 3-Pole Molded Case Circuit Breaker for Power Distribution: Functions as a 3-pole molded case circuit breaker (MCCB) designed to protect 3-phase electrical systems from overcurrent, short circuits, and overloads in industrial environments. It combines switching and protection functions in a single device, making it ideal for main distribution panels, motor control centers, or feeder circuits in manufacturing plants, warehouses, and commercial facilities. High Current Rating with Precise Protection: Rated for 63A continuous current and AC 690V (maximum), with a breaking capacity of 15kA at 415V—capable of safely interrupting fault currents in medium-power industrial networks. It features thermal-magnetic tripping (inverse time-delay for overloads, instantaneous for short circuits) to match the characteristics of 3-phase motors, transformers, and distribution systems, preventing damage to equipment during electrical faults. Robust Construction for Industrial Reliability: Housed in a flame-retardant thermoset plastic enclosure (UL94 V-0 rating) that resists heat, impact, and chemical exposure. The internal components (copper bus bars, contacts) are designed for low resistance and high conductivity, minimizing energy loss and ensuring stable performance even under continuous full-load operation. The breaker’s modular design allows for easy integration into standard switchgear assemblies. Manual Operation with Safety Features: Equipped with a rotary handle for manual ON/OFF operation, featuring a clear visual indicator (red for OFF, green for ON) to confirm the breaker’s status at a glance. The handle includes a lockable mechanism that accepts padlocks (5mm shackle diameter) in both ON and OFF positions, supporting Lockout-Tagout (LOTO) procedures during maintenance to prevent accidental energization. Flexible Mounting & Wiring: Designed for panel mounting in switchgear or distribution enclosures, with standardized DIN rail compatibility (EN 50022) for easy installation. The line and load terminals use bolted connections, accepting 10–35mm² copper conductors (or aluminum with adapters) to accommodate large cable sizes common in industrial power systems. Internal arc chutes suppress arcing during switching, extending contact life and enhancing safety. Global Safety & Compliance: Meets IEC 60898-1, EN 60947-2, and UL 489 standards, ensuring compliance with international electrical codes for overcurrent protection devices. It operates reliably in temperatures ranging from -5°C to +70°C (23°F to 158°F) and is certified for use in polluted environments (degree of protection: IP20), making it suitable for diverse industrial settings. Typical Applications The Siemens Switch 3LD2164-1TC51 is engineered for overcurrent protection in 3-phase industrial power systems, with core use cases including: Main Distribution Panels: Installed as the main incoming breaker in small to medium-sized industrial facilities, protecting the entire electrical system from overloads and short circuits. Motor Control Circuits: Used to protect 3-phase motors (up to 30kW at 415V) in conveyor systems, pumps, or compressors, where thermal-magnetic tripping prevents motor burnout from sustained overloads. Feeder Circuit Protection: Deployed in distribution boards to protect feeder circuits supplying power to lighting, HVAC, or auxiliary equipment, isolating faults to prevent system-wide outages. Machine Tool Power Supply: Integrated into the power supply units of large machine tools (e.g., CNC mills, lathes) to protect internal electrical components from overcurrent damage during operation. Temporary Power Distribution: Used in portable distribution units for construction sites or event setups, providing reliable overcurrent protection for temporary 3-phase equipment.