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SIEMENS 3RV2021-1BA10-Z W96 Motor Protection Circuit Breaker (MPCB)

Mar. 18 , 2026

1. Product Name
SIEMENS 3RV2021-1BA10-Z W96 Motor Protection Circuit Breaker (MPCB)

2. Product Brief Introduction
The SIEMENS 3RV2021-1BA10-Z W96 is a Motor Protection Circuit Breaker (MPCB) from the Siemens SIRIUS 3RV series. It is a compact, all-in-one device designed for the comprehensive protection and control of three-phase electric motors, integrating short-circuit protection, adjustable thermal overload protection, and a switching/isolation function into a single unit.

3. Product Description
The SIEMENS 3RV2021-1BA10-Z W96 is a versatile and integrated Motor Protection Circuit Breaker (MPCB) belonging to the reliable Siemens SIRIUS 3RV family. Engineered specifically for motor control applications, this device consolidates essential protection and switching functions into a single, space-saving unit. Its primary purpose is to provide reliable, coordinated protection for a ‌SIEMENS MOTOR‌ against common electrical faults. The device incorporates instantaneous magnetic trip protection to react to high-level short-circuit currents, shielding the ‌SIEMENS MOTOR‌ windings and the electrical circuit from immediate catastrophic damage. Concurrently, its adjustable thermal overload protection guards against sustained overloads—situations where the motor operates above its rated current for an extended period, leading to dangerous overheating and potential insulation failure. This protection also covers phase failure (single-phasing) and significant phase imbalance. The MPCB additionally serves as a manual ON/OFF switch for the motor circuit and provides a safe isolation point for maintenance, often featuring a lockable handle for enhanced safety. The adjustable current setting allows for precise calibration to match the specific full-load ampere (FLA) rating of the ‌SIEMENS MOTOR‌ it is protecting, ensuring tailored and accurate performance. Built with robust construction for industrial environments, it simplifies panel design by significantly reducing the number of components compared to traditional setups (separate fuse, contactor, and overload relay). This integration minimizes wiring, saves space, and enhances overall system reliability. The 3RV2021-1BA10-Z W96, with its "Z W96" suffix indicating specific configuration or accessory options, is a fundamental component for ensuring the operational safety, minimizing downtime, and prolonging the service life of the connected ‌SIEMENS MOTOR‌.

4. Product Model Number

3RV2021-1BA10-Z W963VM1125-4ED12-0AA06SL3521-3XM01-5AA0
3RV2021-1BA10-Z X953VM1125-4ED22-0AA06SL3521-3XM01-5AB0
3RV2021-1BA153VM1125-4ED32-0AA06SL3521-3XM01-5AF0
3RV2021-1BA203VM1125-4ED42-0AA06SL3521-3XM02-2AA0
3RV2021-1BA20-0BA03VM1125-4EE32-0AA06SL3521-3XM02-2AB0
3RV2021-1BA20-Z X953VM1125-4EE42-0AA06SL3521-3XM02-2AF0
3RV2021-1BA253VM1125-4GD42-0AA06SL3521-3XM03-0AA0
3RV2021-1CA103VM1125-4GE42-0AA06SL3521-3XM03-0AB0
3RV2021-1CA10-0DA03VM1125-5ED32-0AA06SL3521-3XM03-0AF0
3RV2021-1CA10-Z W963VM1125-5ED42-0AA06SL3521-3XM04-0AA0
3RV2021-1CA10-Z W973VM1125-5EE32-0AA06SL3521-3XM04-0AB0
3RV2021-1CA153VM1125-5EE42-0AA06SL3521-3XM04-0AF0
3RV2021-1CA203VM1125-5GD42-0AA06SL3521-3XM05-5AA0
3RV2021-1CA20-0BA03VM1125-5GE42-0AA06SL3521-3XM05-5AF0
3RV2021-1CA20-Z X953VM1132-3ED12-0AA06SL3521-3XM07-5AA0
3RV2021-1CA253VM1132-3ED22-0AA06SL3521-3XM07-5AF0
3RV2021-1DA103VM1132-3ED32-0AA06SL3521-3XN00-3AA0
3RV2021-1DA10-0DA03VM1132-3ED42-0AA06SL3521-3XN00-3AB0
3RV2021-1DA10-Z W963VM1132-3EE32-0AA06SL3521-3XN00-3AF0
3RV2021-1DA10-Z W973VM1132-3EE42-0AA06SL3521-3XN00-5AA0
3RV2021-1DA10-Z X953VM1132-3GD42-0AA06SL3521-3XN00-5AB0
3RV2021-1DA153VM1132-3GE42-0AA06SL3521-3XN00-5AF0
3RV2021-1DA203VM1132-4ED12-0AA06SL3521-3XN00-7AA0
3RV2021-1DA20-Z X953VM1132-4ED22-0AA06SL3521-3XN00-7AB0
3RV2021-1DA253VM1132-4ED32-0AA06SL3521-3XN00-7AF0
3RV2021-1EA103VM1132-4ED42-0AA06SL3521-3XN01-1AA0
3RV2021-1EA10-0DA03VM1132-4EE32-0AA06SL3521-3XN01-1AB0
3RV2021-1EA10-Z W963VM1132-4EE42-0AA06SL3521-3XN01-1AF0
3RV2021-1EA153VM1132-4GD42-0AA06SL3521-3XN01-5AA0
3RV2021-1EA203VM1132-4GE42-0AA06SL3521-3XN01-5AB0

5. Product Advantages

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

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

  • Accurate and Tailored Motor Protection:‌ Features a user-friendly, 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 Safety and Control:‌ Functions as a reliable manual switch for starting and stopping the motor and provides a safe, lockable means of isolation for maintenance, improving overall operational safety for personnel.

  • Clear Status Indication and High Reliability:‌ Offers clear visual trip and status indication for quick fault diagnosis. Manufactured to Siemens' stringent industrial standards, it ensures dependable performance and durability in challenging operating conditions.

6. Website Analysis & Insights
Based on the comprehensive ‌for the website ‌www.wheat-auto.com‌, which represents ‌Changzhou Wheat Automation Technology Co., Ltd.‌, the following insights into its business operations and focus 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 or a ‌global sourcing channel‌.

  • Business Scope & Product Portfolio:‌ The website functions as a ‌one-stop sourcing platform‌, listing an extensive array of branded industrial components from numerous global manufacturers. The provided content prominently lists major international brands, including ‌SIEMENS MOTOR‌, ‌ABB MOTORS‌, DeWalt, Endress&Hauser, Krohne, Honeywell, METTLER TOLEDO, Yokogawa, PIZZATO, and many others across diverse categories such as sensors, instruments, switches, tools, and more. Their listed product range extends to "air switches, pumps, power semiconductor modules and components".

  • Target Market & Operations:‌ The multilingual interface (English, Chinese, Russian) of the website clearly indicates a strategic focus on the ‌global B2B market‌, targeting international clients in industrial automation, manufacturing, and process control sectors. The company's operational model is strongly ‌inquiry-based and direct sales-oriented‌. Evidence of this is the "News" section, which acts as a product feed, listing specific part models (e.g., Siemens 6GK6000-8FX3VA2225-5H) and providing direct contact information including WhatsApp (+86 15951219765) and email (info@wheat-auto.com). This suggests they primarily cater to buyers actively searching for exact part numbers online who then make direct inquiries.

  • Value Proposition & Company Ethos:‌ The company's stated business principle is ‌"quality first, reputation first"‌. Their core value lies in ‌global supply chain management and logistics‌, providing worldwide access to specific branded components like the SIEMENS 3RV2021-1BA10-Z W96. They emphasize establishing long-term friendly business relationships with domestic and international enterprises. They describe themselves as a high-tech electronics company established in 2012, focusing on strict quality assurance, perfect management, and creating higher market value for society, customers, and the company itself.

Interpretation:‌ Changzhou Wheat Automation Technology Co., Ltd. (Wheat Automation) positions itself as a ‌global sourcing partner and commercial bridge‌. Their expertise is in international trade, sourcing, and the logistics of distributing specialized industrial components. They leverage a multilingual online presence and direct communication channels to connect global manufacturers (like Siemens and ABB) with international end-users, system integrators, and distributors. Their role is to navigate the global supply chain to source specific, often branded, industrial parts requested by their global clientele.

7. Use Scenarios

  • Compact Motor Starter Enclosures:‌ Used as the primary protection and control device within compact starter boxes or control panels for individual ‌SIEMENS MOTORs‌ driving applications such as pumps, fans, small compressors, and conveyor systems.

  • OEM Machinery and Equipment:‌ Integrated into the electrical control cabinets of machine tools, packaging equipment, and other Original Equipment Manufacturer (OEM) machinery to provide main power switching, overload, and short-circuit protection for the integrated ‌SIEMENS MOTOR‌.

  • Distributed Motor Control Applications:‌ Ideal for installations where motors are located at various points in a facility, as it provides a self-contained, compact unit for protection, control, and isolation at each ‌SIEMENS MOTOR‌ location, simplifying wiring and maintenance.

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

  • Panel Building and System Integration:‌ Favored by control panel builders and system integrators for its space-saving design and simplified wiring, which reduces assembly time and costs in control cabinet production.


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