常州麦兹自动化经营品牌OBO，联系13357889265，更多型号SIEMENS 3RU2136-4GB1 Thermal Overload Relay等见下表。

‌1. Product Name‌
SIEMENS 3RU2136-4GB1 Thermal Overload Relay

‌2. Product Brief Introduction‌
The SIEMENS 3RU2136-4GB1 is a thermal overload relay from the Siemens SIRIUS 3RU series. It is a dedicated protection device designed to safeguard three-phase electric motors from damage caused by sustained overloads, phase failure, and phase imbalance by interrupting the motor control circuit when a fault is detected.

‌3. Product Description‌
The SIEMENS 3RU2136-4GB1 is a reliable and essential motor protection component within the Siemens SIRIUS modular system. Its core purpose is to prevent damage to a ‌SIEMENS MOTOR‌ caused by overheating, which can result from electrical overloads, the loss of one phase (single-phasing), or a significant imbalance between phases. Operating on a proven thermal principle, it contains a bimetal strip that heats and deflects in proportion to the motor's current. Under normal conditions, the current drawn by the ‌SIEMENS MOTOR‌ generates a safe amount of heat, and the relay remains closed. However, if an overload persists—for example, due to a mechanical jam, a locked rotor, or a failing bearing—the increased current causes excessive heat, bending the bimetal strip further. After a predefined time delay (characterized by its trip class, typically Class 10 or similar), this deflection triggers a mechanism that opens the relay's normally closed (NC) auxiliary contact. This NC contact is usually wired in series with the coil of the motor's main contactor. When it opens, it de-energizes the contactor coil, which in turn disconnects the power supply to the ‌SIEMENS MOTOR‌, stopping it before its insulation can be damaged by excessive temperatures. The 3RU2136-4GB1 features an adjustable current setting, allowing it to be precisely calibrated to the full-load ampere (FLA) rating of the specific ‌SIEMENS MOTOR‌ it protects. It offers clear visual trip indication and can be configured for manual or automatic reset. Designed for ease of use and integration, it mounts directly onto compatible SIRIUS 3RT series contactors, forming a compact and robust motor starter assembly. This device is a fundamental element in ensuring the operational safety, longevity, and reliability of ‌SIEMENS MOTORs‌ across diverse industrial, commercial, and infrastructure applications.

‌4. Product Model Number‌

‌5. Product Advantages‌

• ‌Reliable Motor Protection:‌ Provides dependable protection against sustained overloads, phase loss, and phase imbalance, effectively preventing costly burnout and extending the operational life of the connected ‌SIEMENS MOTOR‌.

• ‌Precise and Adjustable Setting:‌ Features a user-friendly, calibrated dial for adjusting the trip current, ensuring accurate and tailored protection that matches the specific full-load current of the ‌SIEMENS MOTOR‌.

• ‌Clear Visual Fault Indication:‌ Includes a distinct trip indicator (e.g., a colored flag or button), providing immediate and unambiguous visual confirmation of a protective operation, which aids in rapid fault diagnosis and maintenance.

• ‌Flexible Reset Options:‌ Offers the choice between manual reset (ideal for safety-critical applications requiring inspection) and automatic reset (suitable for unattended operations after a cool-down period), providing application flexibility.

• ‌Modular and Space-Efficient Design:‌ As part of the SIRIUS 3RU system, it is designed for straightforward, tool-free mounting onto corresponding contactors, enabling the creation of a compact, integrated, and easily serviceable motor starter solution.

‌6. Website Analysis & Insights‌
Based on the attached‌, the website ‌www.wheat-auto.com‌ belongs to ‌Changzhou Wheat Automation Technology Co., Ltd.‌ An analysis of its content reveals the following business insights:

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

‌Key Findings:‌

• ‌Business Model & Portfolio:‌ The website functions as a ‌one-stop sourcing channel‌ or platform, 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, PIZZATO, and many others across categories like sensors, instruments, switches, and tools.

• ‌Target Market:‌ The website's availability in ‌English, Chinese, and Russian‌ clearly indicates a strategic focus on the ‌global B2B market‌, targeting international clients in industrial automation, manufacturing, and related sectors.

• ‌Value Proposition & Operations:‌ The company's stated principle is ‌"quality first, reputation first."‌ Their core service is ‌global supply chain management and logistics‌, providing customers worldwide with access to specific branded components. Their operational model appears to be ‌inquiry-based and direct sales-oriented‌. The "News" section is used as a product promotion feed, listing specific Siemens part models (3VA2225-5H, 6GK6000-8FX) with direct contact information like WhatsApp (+86 15951219765) and email (info@wheat-auto.com).

• ‌Company Overview:‌ Describing itself as a high-tech electronics company established in 2012, it emphasizes building long-term business relationships with domestic and international enterprises, a strict quality system, and creating higher market value.

‌Interpretation:‌ Wheat Automation positions itself as a ‌global sourcing and commercial bridge‌, connecting international manufacturers (like Siemens) with worldwide end-users, system integrators, and distributors. Their expertise lies in international trade, sourcing, and the logistics of distributing specialized industrial components, rather than in-house manufacturing.

‌7. Use Scenarios‌

• ‌Motor Control Centers (MCCs) and Starter Panels:‌ The most common application. Used in combination with a contactor within an MCC or a dedicated starter enclosure to provide overload and phase protection for ‌SIEMENS MOTORs‌ driving industrial equipment such as pumps, fans, compressors, blowers, and conveyor systems.

• ‌Industrial Machinery Control Systems:‌ Integrated into the electrical control panels of machine tools (e.g., lathes, milling machines), packaging equipment, and assembly lines to protect the main drive and auxiliary ‌SIEMENS MOTORs‌ from overloads caused by mechanical faults or process errors.

• ‌HVAC and Building Services:‌ Applied in control circuits for commercial and industrial Heating, Ventilation, and Air Conditioning (HVAC) systems to protect fan, pump, and compressor ‌SIEMENS MOTORs‌ from failure due to blocked airflow, jammed components, or electrical faults.

• ‌Infrastructure and Process Applications:‌ Installed in control panels for water and wastewater treatment plants (for pumps and mixers), agricultural irrigation systems, and material handling equipment to safeguard critical ‌SIEMENS MOTORs‌, ensuring the reliability and continuity of essential processes.