SIEMENS 6EW1890-3AB Plc Modules

( Brand: Siemens ), ( Manufacturer Part Number: 6EW1890-3AB ), ( Part Type: Module )

Review SIEMENS 6ew18903ab Used

The **Siemens 6EW1890-3AB (6EW18903AB)** is a high-performance, modular **SIMATIC ET 200SP** (S7-1200/1500-compatible) terminal block designed for industrial automation applications requiring robust, space-efficient, and flexible connectivity solutions. Part of Siemens advanced **ET 200SP** series, this terminal block is engineered to meet the stringent demands of modern manufacturing, process control, and automation environments where reliability, compact design, and ease of integration are critical. Built with Siemens signature precision engineering, the **6EW1890-3AB** features a **3-pole terminal block** with **screw-type connections**, ensuring secure and stable electrical contacts even under high-vibration conditions a common challenge in industrial settings. Its **compact footprint** allows for efficient wiring and space optimization within control panels, making it ideal for applications where real estate is limited but performance cannot be compromised. The terminal block is compatible with **SIMATIC S7-1200 and S7-1500** controllers, enabling seamless integration into Siemens scalable automation architecture, where users can leverage the full suite of **TIA Portal** software for programming, diagnostics, and maintenance. Constructed from high-quality, **UL94-V0-rated materials**, it offers excellent resistance to heat, moisture, and chemical exposure, ensuring long-term durability in harsh industrial environments. The **color-coded terminals** (typically black, red, and blue) simplify wiring and reduce human error during installation, while the **modular design** allows for easy expansion or reconfiguration as system requirements evolve. Whether deployed in **discrete manufacturing, energy management, or building automation**, the **6EW1890-3AB** delivers a balance of **performance, reliability, and adaptability**, making it a trusted component in Siemens comprehensive automation ecosystem. Its **low impedance and high current-carrying capacity** (up to **10A per pole**, depending on wiring configuration) ensure efficient power distribution and signal integrity, while its **IP20 protection rating** (standard for panel-mounted applications) provides adequate shielding against dust and solid objects, though it is not suitable for outdoor or corrosive environments without additional protection. Engineers and technicians will appreciate its **quick-connect design**, which minimizes installation time while maintaining a secure connection, and its **back-wiring capability**, which enhances flexibility during panel assembly. Overall, the **Siemens 6EW1890-3AB** is a versatile, high-quality terminal block that embodies Siemens commitment to innovation and engineering excellence in industrial automation.

### **Pros and Cons of Buying Siemens 6EW1890-3AB (6EW18903AB)**

#### **Overview**

The **Siemens 6EW1890-3AB** (also referenced as **6EW18903AB**) is a **DC motor starter (contactor) with integrated overload protection**, commonly used in industrial automation, HVAC systems, and motor control applications. It is part of Siemens **3RW series** and is designed for **three-phase AC motors** with a rated current up to **16 A (standard model)**.

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### **Pros**

1. **Reliable Brand Reputation**

- Siemens is a well-established manufacturer in industrial automation, known for durable and high-quality components. Their products are widely used in critical applications where reliability is essential.

2. **Integrated Overload Protection**

- The unit includes **thermal overload protection**, reducing the need for separate overload relays. This simplifies wiring and installation while improving safety by preventing motor burnout due to overloads.

3. **Compact and Space-Efficient Design**

- The **3RW series** is designed for modular integration, making it suitable for **panel-mounted applications** where space is limited. It can be easily combined with other Siemens components (e.g., relays, timers).

4. **Easy Installation and Wiring**

- The **plug-in terminal blocks** allow for straightforward wiring, reducing installation time. Siemens provides clear documentation, including wiring diagrams and installation manuals.

5. **Compatibility with Siemens Automation Systems**

- If you are already using **Siemens PLCs (e.g., S7-1200, S7-300), HMI panels, or other automation components**, this contactor integrates seamlessly with **PROFIBUS DP, PROFINET, or free-running control** options, depending on the variant.

6. **Standardized and Tested for Industrial Use**

- The component undergoes **rigorous testing** for vibration, temperature fluctuations, and electrical stress, making it suitable for harsh industrial environments.

7. **Long Lifespan and Low Maintenance**

- Siemens contactors are built for **high cycle life** (typically **10 20 million operations**), reducing the need for frequent replacements. The **silver-plated contacts** minimize arcing and wear.

8. **Availability of Spare Parts and Support**

- Siemens has a **global supply chain**, ensuring easy access to replacements, upgrades, or technical support. Many distributors and industrial suppliers stock this part.

9. **Energy Efficiency**

- Modern Siemens contactors are designed to **minimize energy loss** during switching, contributing to overall system efficiency.

10. **Regulatory Compliance**

- The product meets **international safety standards** (e.g., **IEC 60947-4-1, UL, CE**), ensuring compliance with workplace safety regulations.

---

### **Cons**

1. **Higher Upfront Cost Compared to Generic Brands**

- Siemens components are **premium-priced** compared to **no-name or generic contactors** from lesser-known manufacturers. For budget-sensitive projects, this may be a drawback.

2. **Limited Current Rating (Standard Model)**

- The **6EW1890-3AB** is rated for **16 A (AC-3, 50/60 Hz)**, which may be insufficient for **high-power motors** (e.g., pumps, compressors, or large conveyors). For higher currents, Siemens offers **larger variants (e.g., 6EW1890-4AB for 25 A, 6EW1890-5AB for 40 A)**, which may require additional investment.

3. **Potential Obsolescence Risk**

- While Siemens is a stable brand, **older models may eventually be discontinued** as newer series (e.g., **3RW3, 3RW4**) are introduced. This could lead to **higher long-term costs** if replacements are needed.

4. **Complexity for Non-Experienced Users**

- Siemens documentation, while detailed, can be **technically dense** for those unfamiliar with industrial automation. Proper **wiring, commissioning, and troubleshooting** may require **technical expertise**.

5. **Dependence on Siemens Ecosystem**

- If your system is **mixed with non-Siemens components**, integration may require **additional adapters or converters**, adding complexity.

6. **Potential for Counterfeit Parts**

- Due to Siemens reputation, **fake or low-quality replicas** may appear in the market. Purchasing from **authorized distributors** (e.g., Siemens Direct, Grainger, RS Components) is crucial to avoid counterfeit issues.

7. **Limited Customization Options**

- Unlike some competitors, Siemens does not offer **extensive customization** (e.g., different mounting styles, additional sensors) for this specific model. If unique requirements exist, alternative solutions may be needed.

8. **Replacement Costs Over Time**

- While durable, **contacts and internal components may wear out** after prolonged use. Replacing just the **contacts or overload elements** can be expensive compared to a full unit replacement.

9. **Lead Times for Special Orders**

- Depending on the distributor, **stock availability** may vary. For **custom or discontinued variants**, lead times could extend **weeks or months**.

10. **Training and Learning Curve**

- Siemens automation systems often require **specialized training** to fully utilize features like **PROFIBUS communication or advanced diagnostics**. This may add **time and cost** to implementation.

---

### **Conclusion**

The **Siemens 6EW1890-3AB** is a **high-quality, reliable, and well-supported** motor starter suitable for **mid-range industrial applications** where **durability, safety, and integration with Siemens systems** are priorities. Its **integrated overload protection, compact design, and ease of installation** make it a strong choice for **panel-mounted motor control** in **HVAC, manufacturing, or process automation**.

However, **higher upfront costs, limited current capacity (16 A), potential obsolescence, and complexity for non-experts** may make it less ideal for **budget-conscious projects, high-power applications, or systems requiring extensive customization**. If **cost efficiency is critical**, alternatives like **Schneider Electric, ABB, or generic contactors** (with proper safety features) could be considered.

For **new installations where long-term reliability and Siemens ecosystem integration** are key, the **6EW1890-3AB remains a solid choice**. For **legacy systems or cost-sensitive applications**, evaluating **alternative models (e.g., 6EW1890-4AB for higher current) or brands** may be advisable.

---

### **Recommendation**

- You are working within a **Siemens automation environment** (PLCs, HMIs, PROFIBUS).

- **Reliability, safety, and long-term support** are critical.

- Your motor load is ** 16 A (AC-3)**.

- You prioritize **easy integration and modularity** in your control panel.

- You can afford the **premium pricing** and are purchasing from an **authorized distributor**.

- Your budget is **strictly limited** explore **Schneider Electric (e.g., TeSys D), ABB, or reputable generic brands** with similar specs.

- You need **higher current ratings** upgrade to **6EW1890-4AB (25 A) or 6EW1890-5AB (40 A)**.

- Your application involves **frequent motor changes** a **modular starter system** may offer more flexibility.

- You lack **Siemens expertise** ensure proper training or consult an automation specialist before installation.

For **most industrial applications requiring a dependable, Siemens-compatible motor starter**, the **6EW1890-3AB is a strong and justified purchase**. However, **careful consideration of cost, current requirements, and long-term maintenance** will determine whether it is the best fit for your specific project.

Details:

Sells new and surplus product develops channels to purchase such. All products are guaranteed to be working but may show signs of use if purchasing a used product. Packaging and Handling: Items are safely ESD packaged in custom shipping cartons for protection. Call to use a shipping service other than the ones listed.

part #: 6ew18903ab prices

• $813.01-$1214.87

specifications sensoindustria:

• brand: Siemens
• mpn: 6ew1890-3ab
• part type: Module

payments sensoindustria:

• other
• credit card: Mastercard
• wallet: Paypal

seller sensoindustria:

• rating: 99.5%
• # reviews: 188285
• city: 1 Millennium Dr, Willingboro, NJ 08046

returns sensoindustria:

• paid by: Buyer
• method: Money back
• time: 30 Days
• policy: Returns Accepted

offer sensoindustria:

• options: Ship-to-home
• best offers: True
• quantity: 1
• sold: 0
• availability: In Stock
• started: February 1, 2026

general sensoindustria:

• condition: Used
• PLCs HMIs > PLC Peripheral Modules > PLC Input Output Modules

shipping sensoindustria:

• class: Standard
• cost: $12.90
• transit: 24-37 Days
• service: Standard
• type: Fixed

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