SIEMENS 3RV2021-1JA20-Z W96 Motor Protection Circuit Breaker (MPCB)

‌1. Product Name‌
SIEMENS 3RV2021-1JA20-Z W96 Motor Protection Circuit Breaker (MPCB)

‌2. Product Brief Introduction‌
The SIEMENS 3RV2021-1JA20-Z W96 is a Motor Protection Circuit Breaker (MPCB) from the Siemens SIRIUS 3RV series. It is an all-in-one, integrated device designed to provide comprehensive protection and control for three-phase electric motors, combining short-circuit protection, adjustable thermal overload protection, and a manual switching/disconnection function within a compact housing.

‌3. Product Description‌
The SIEMENS 3RV2021-1JA20-Z W96 is a key component within Siemens' versatile SIRIUS 3RV range of motor protection devices. This Motor Protection Circuit Breaker (MPCB) is engineered to streamline motor control while offering robust protection for electric motors. Its integrated design merges multiple critical functions into a single, compact unit, making it a highly efficient solution. The primary purpose of the 3RV2021-1JA20-Z W96 is to deliver reliable and coordinated protection for a ‌SIEMENS MOTOR‌. It features an instantaneous magnetic trip mechanism to respond to high-level short-circuit currents, preventing immediate and severe damage to the ‌SIEMENS MOTOR‌ windings and the connected electrical system. Concurrently, its adjustable thermal overload relay protects the motor against sustained overloads—situations where the ‌SIEMENS MOTOR‌ operates above its rated current for an extended period, which can lead to dangerous overheating and potential insulation failure. This protection also safeguards the motor from phase failure (single-phasing) and significant phase imbalances. In addition to these protective functions, the device acts as a manual ON/OFF switch for the motor circuit and provides a safe isolation point for maintenance tasks, enhancing operational safety. Its adjustable current setting enables precise calibration to match the exact full-load ampere (FLA) rating of the specific ‌SIEMENS MOTOR‌ it protects. Built with industrial durability in mind, this MPCB simplifies panel design by replacing the traditional assembly of a separate fuse, contactor, and overload relay. This integration results in reduced wiring, minimized panel space, and fewer potential failure points. By offering an all-in-one solution, the SIEMENS 3RV2021-1JA20-Z W96 ensures enhanced safety, reduces downtime, and contributes significantly to the longevity and reliable operation of the connected ‌SIEMENS MOTOR‌.

‌4. Product Model Number‌

‌5. Product Advantages‌

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

• ‌Simplified Panel Design & Installation:‌ Reduces the need for multiple components (separate fuse, overload relay, isolator), leading to less wiring complexity, significant space savings in the control panel, faster installation, and reduced potential points of failure.

• ‌Precise & Adjustable Settings:‌ Features a user-friendly adjustable thermal overload setting, allowing for accurate calibration to the specific full-load current of the ‌SIEMENS MOTOR‌, ensuring optimal protection against overheating and electrical faults.

• ‌Enhanced Safety Features:‌ Serves as a reliable manual on/off switch and provides a safe isolation point (often lockable) for maintenance, improving overall operational safety for personnel working with the ‌SIEMENS MOTOR‌ system.

• ‌Clear Indication & High Reliability:‌ Offers clear visual indicators for trip status and is built to Siemens' stringent industrial standards, ensuring dependable performance, long service life, and durability in demanding operating environments.

‌6. Website Analysis & Insights‌
Based on the provided for the website ‌www.wheat-auto.com‌, which belongs to ‌Changzhou Wheat Automation Technology Co., Ltd.‌, the following insights into its business are generated:

• ‌Core Business Model:‌ The company operates as an ‌international supplier, distributor, and trader‌ of a wide range of industrial automation components and electronic products. It is explicitly ‌not a manufacturer‌ but a ‌trading and sourcing intermediary‌.

• ‌Product Portfolio & Scope:‌ The website functions as a ‌one-stop sourcing channel‌, listing a vast array of branded components from numerous global manufacturers. Prominently featured brands include ‌SIEMENS MOTOR‌, ‌ABB MOTORS‌, DeWalt, Endress&Hauser, Krohne, Honeywell, METTLER TOLEDO, Yokogawa, and many others.

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

• ‌Value Proposition & Operations:‌ The company's stated principle is ‌"quality first, reputation first."‌ Its core service is ‌global supply chain management and logistics‌, providing customers worldwide with access to specific branded components. The "News" section lists specific Siemens part models and provides direct contact information like WhatsApp (+86 15951219765) and email (info@wheat-auto.com). This indicates a strong ‌inquiry-based, direct sales model‌, where they act as a sourcing agent for buyers searching for exact part numbers.

• ‌Company Profile:‌ They describe themselves as a high-tech electronics company established in 2012, emphasizing building long-term business relationships, a strict quality system, and creating higher market value.

‌Interpretation:‌ In summary, Changzhou Wheat Automation Technology Co., Ltd. positions itself as a ‌global sourcing partner and commercial bridge‌. Their expertise lies in international trade, sourcing, and distributing specialized industrial components. They connect global manufacturers (like Siemens) with international end-users, system integrators, and distributors.

‌7. Use Scenarios‌

• ‌Compact Motor Starter Assemblies:‌ Widely used as the primary protection and control device in compact starter enclosures for individual ‌SIEMENS MOTORs‌ driving applications like pumps, fans, small compressors, and conveyor drives.

• ‌OEM & Machine Builder Applications:‌ Integrated into the electrical control cabinets of machine tools, packaging machinery, and other OEM equipment to provide main power switching, overload, and short-circuit protection for the integrated ‌SIEMENS MOTOR‌.

• ‌Distributed Motor Control Points:‌ Ideal for applications where motors are distributed throughout a facility, as it provides a self-contained, compact unit for protection, control, and isolation at each ‌SIEMENS MOTOR‌ location, simplifying installation and maintenance.

• ‌HVAC & Building Services:‌ Applied in Heating, Ventilation, and Air Conditioning (HVAC) systems and other building services equipment (e.g., exhaust fans, water pumps) to protect and manually control fan and pump ‌SIEMENS MOTORs‌.