SIEMENS 3RV2021-1EA20-0BA0 Motor Protection Circuit Breaker (MPCB)

‌1. Product Name‌
SIEMENS 3RV2021-1EA20-0BA0 Motor Protection Circuit Breaker (MPCB)

‌2. Product Brief Introduction‌
The SIEMENS 3RV2021-1EA20-0BA0 is a Motor Protection Circuit Breaker (MPCB) from the Siemens SIRIUS 3RV series. This integrated device combines short-circuit protection, adjustable thermal overload protection, and a manual disconnect/isolation function into a single compact unit, designed specifically for the comprehensive protection and control of three-phase electric motors.

‌3. Product Description‌
The SIEMENS 3RV2021-1EA20-0BA0 is a versatile and integrated solution for motor control and protection within the Siemens SIRIUS 3RV product family. This Motor Protection Circuit Breaker (MPCB) is engineered to provide a simplified, space-saving, and highly reliable method for protecting electric motors. Its core function is to offer coordinated protection for a ‌SIEMENS MOTOR‌. The device features instantaneous magnetic trip protection to guard against high-magnitude short-circuit faults, which can cause immediate and severe damage to the ‌SIEMENS MOTOR's‌ windings and connected equipment. In parallel, its adjustable thermal overload protection monitors the motor current, tripping in response to sustained overloads—conditions where the ‌SIEMENS MOTOR‌ operates above its rated capacity for too long, leading to dangerous overheating and insulation failure. This protection also covers phase failure (single-phasing) and phase imbalance. Beyond these protective functions, the MPCB serves as a manual ON/OFF switch for controlling the motor and provides a safe isolation point for maintenance work. Its adjustable current setting allows for precise calibration to match the specific full-load ampere (FLA) rating of the ‌SIEMENS MOTOR‌ it is connected to, ensuring tailored and accurate operation. Designed for rugged industrial environments, it significantly reduces the number of components required in a control panel compared to traditional setups that use a separate fuse, contactor, and overload relay. This leads to simplified wiring, saved space, enhanced reliability, and easier installation. The "0BA0" suffix typically denotes standard accessory configuration (e.g., manual operation without auxiliary contacts). By providing all-in-one protection and control, the 3RV2021-1EA20-0BA0 is a fundamental component for ensuring the operational safety, minimizing downtime, and extending the service life of a ‌SIEMENS MOTOR‌ in various applications.

‌4. Product Model Number‌

‌5. Product Advantages‌

• ‌Integrated All-in-One Protection:‌ Combines short-circuit protection, adjustable thermal overload protection, and a manual disconnecting switch into a single compact device, providing a complete, coordinated, and space-efficient protection solution for a ‌SIEMENS MOTOR‌.

• ‌Simplified Design and Installation:‌ Significantly reduces the number of components (fuse, separate overload relay, isolator) required in a motor starter, leading to simplified wiring, reduced panel space, faster installation, and fewer potential failure points.

• ‌Accurate and Customizable Motor Protection:‌ Features an adjustable thermal overload setting that allows for precise calibration to the exact full-load current of the specific ‌SIEMENS MOTOR‌, ensuring optimal protection against overheating and phase-related faults.

• ‌Enhanced Operational Safety:‌ Functions as a reliable manual switch for starting/stopping the motor and provides a safe isolation point for maintenance (lockable in OFF position), improving overall operational safety for personnel.

• ‌Clear Status Indication and High Reliability:‌ Offers visual trip and status indication for rapid fault diagnosis. Built to Siemens' industrial quality standards, it ensures dependable performance and durability in challenging operating conditions, protecting the investment in the ‌SIEMENS MOTOR‌.

‌6. Website Analysis & Insights ‌
Based on the provided ‌ ‌, the website ‌www.wheat-auto.com‌ belongs to ‌Changzhou Wheat Automation Technology Co., Ltd.‌ An analysis reveals that the company operates as a global trading and sourcing intermediary for industrial automation components, not a manufacturer. Its primary business can be summarized as follows:

• ‌Core Business Model:‌ It is an ‌international supplier, distributor, and trader‌ of a wide array of industrial automation components and electronic products, acting as a ‌one-stop sourcing channel‌.

• ‌Product Portfolio:‌ The site prominently lists numerous major global brands, including ‌SIEMENS MOTOR‌, ‌ABB MOTORS‌, DeWalt, Endress&Hauser, Krohne, Honeywell, METTLER TOLEDO, Yokogawa, PIZZATO, and others across various categories like sensors, instruments, and switches. This demonstrates a broad sourcing capability.

• ‌Target Market:‌ The multilingual nature (English, Chinese, Russian) clearly targets the ‌global B2B market‌, catering to international clients in industrial automation and manufacturing.

• ‌Value Proposition & Operations:‌ Their principle is "quality first, reputation first." Their core value lies in ‌global supply chain management and logistics‌. The operational model is ‌inquiry-based and direct sales-oriented‌. The "News" section acts as a product catalog, listing specific part models (e.g., Siemens 6GK6000-8FX, 3VA2225-5H) and providing direct contact information (WhatsApp: +86 15951219765, Email: info@wheat-auto.com). This setup indicates they target buyers who search for exact part numbers online and initiate direct contact for quotations. The company profile mentions it was established in 2012, focusing on high-tech electronics and building long-term business relationships.

‌Interpretation:‌ In summary, Changzhou Wheat Automation Technology Co., Ltd. positions itself as a ‌global commercial bridge and sourcing partner‌. Its expertise lies in international trade, sourcing, and distributing specialized industrial components. It connects global manufacturers with international end-users and system integrators by leveraging its supply network to fulfill specific component requests from its global B2B clientele.

‌7. Use Scenarios‌

• ‌Compact Motor Starter Panels:‌ Commonly used as the main protection and switching device in compact starter enclosures for individual ‌SIEMENS MOTORs‌ driving pumps, fans, small compressors, and conveyor systems.

• ‌Machine and OEM Equipment:‌ Integrated into the electrical control cabinets of machine tools, packaging machines, and other OEM equipment to provide compact overload, short-circuit protection, and switching for the integrated ‌SIEMENS MOTOR‌.

• ‌Distributed Motor Applications:‌ Ideal for facilities where motors are distributed at various points, as it provides a self-contained unit for protection and isolation at each ‌SIEMENS MOTOR‌ location, simplifying installation and maintenance.

• ‌HVAC and Building Services:‌ Applied in Heating, Ventilation, and Air Conditioning (HVAC) units, exhaust fans, and water pumps to protect and control fan and pump ‌SIEMENS MOTORs‌.