SIEMENS 1LA7090-4AA12 Motor Fnob 3-PHASE

( Brand: Siemens ), ( Manufacturer Part Number: 1LA7090-4AA12 ), ( Part Type: Motor )

Review SIEMENS 3-phase Motor Fnob

The **Siemens 1LA7090-4AA12** is a high-performance, three-phase induction motor designed for industrial applications requiring reliability, efficiency, and precision. Part of Siemens renowned **1LA7** series, this motor is engineered to deliver robust performance in demanding environments, making it an ideal choice for machinery in manufacturing, automation, and process industries. With a **4-pole configuration**, it operates at a nominal speed of **1,480 RPM** (at 50 Hz) or **1,750 RPM** (at 60 Hz), providing a balanced trade-off between torque and speed for optimal mechanical efficiency. The motor features a **frame size 132M**, which offers a compact yet sturdy construction, allowing for easy integration into existing systems while maintaining high mechanical strength.

This motor is equipped with a **class F insulation system**, ensuring superior thermal performance and extended operational lifespan even under continuous heavy loads. The **IP55 protection rating** guarantees protection against dust and water splashes, making it suitable for both indoor and outdoor applications where environmental exposure is a concern. The **4AA12** designation indicates a **bearing configuration** optimized for smooth operation and reduced maintenance requirements, with sealed bearings that minimize friction and wear over time. Siemens advanced **vector control technology** is embedded within the motor s design, enabling seamless integration with modern variable frequency drives (VFDs) for precise speed and torque control, enhancing energy efficiency and operational flexibility.

The **1LA7090-4AA12** is built with Siemens signature attention to detail, incorporating **high-quality materials** such as corrosion-resistant coatings and reinforced shaft designs to withstand vibrational stresses and mechanical shocks. Its **low-noise operation** and **vibration-dampening features** contribute to a quieter, more stable performance, reducing operational disruptions in sensitive environments. Whether used in conveyor systems, pumps, compressors, or industrial robots, this motor delivers consistent power output with minimal energy loss, aligning with Siemens commitment to **sustainability and efficiency**. Additionally, the motor s **modular design** allows for easy retrofitting and compatibility with a wide range of Siemens and third-party control systems, ensuring seamless integration into existing or new automation setups. Built to meet **IEC and EN standards**, this motor is a testament to Siemens engineering excellence, offering a perfect blend of durability, precision, and adaptability for modern industrial demands.

### **Pros and Cons of buying a Siemens 1LA7090-4AA12 3-Phase Motor (FNOB)**

1. **Reliability and Durability** Siemens is a well-established brand known for high-quality industrial motors. The 1LA7090 series is designed for robust performance in demanding applications, offering long service life with proper maintenance.

2. **Energy Efficiency** This motor likely meets or exceeds IE2 (or higher) efficiency standards, reducing operational costs by lowering energy consumption compared to older, less efficient models.

3. **Wide Compatibility** The 3-phase design makes it suitable for industrial, commercial, and HVAC applications where three-phase power is standard. The FNOB (Fan Cooled) variant ensures adequate cooling for moderate to high-load operations.

4. **Standardized Design** As part of Siemens 1LA7000 series, it follows industry norms, making maintenance, spare parts, and replacements easier to source.

5. **Good Performance at Partial Loads** Many Siemens motors are optimized to maintain efficiency even when operating below full load, which is common in variable-speed applications.

6. **Warranty and Support** Siemens offers warranties and technical support, which can be valuable for businesses relying on critical machinery.

7. **Modularity and Upgrade Potential** Some Siemens motors allow for upgrades (e.g., electronic commutation, variable frequency drive compatibility) if future needs change.

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1. **Higher Initial Cost** Compared to generic or lesser-known brands, Siemens motors typically have a higher upfront price, which may be a barrier for small businesses or budget-conscious buyers.

2. **Maintenance Requirements** While durable, like all motors, it requires regular maintenance (lubrication, alignment checks, cooling system inspection) to prevent premature failure. Neglecting maintenance can lead to costly downtime.

3. **Specialized Installation Needs** Some applications may require additional components (e.g., VFD for variable speed control, proper enclosure for harsh environments), adding to the total cost.

4. **Limited Customization** The 1LA7090-4AA12 is a standard model, so if you need non-standard specifications (e.g., unique shaft dimensions, special insulation classes), you may need to order a custom variant, increasing lead times and costs.

5. **Depreciation** Industrial equipment loses value over time. While Siemens motors hold value better than some competitors, they are still subject to depreciation, especially if newer, more efficient models become available.

6. **Potential Overkill for Light-Duty Use** If the application is very low-load (e.g., small fans, non-critical machinery), a more affordable motor from a different brand might suffice without sacrificing reliability.

7. **Dependence on Siemens Ecosystem** If your facility relies heavily on Siemens components (e.g., PLCs, drives), integrating this motor may be seamless. However, if your system uses non-Siemens equipment, compatibility might require additional planning.

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The **Siemens 1LA7090-4AA12 3-phase motor (FNOB)** is a strong choice for applications requiring **reliability, efficiency, and long-term performance**, particularly in industrial or commercial settings where downtime is costly. Its **higher initial cost is justified by durability and energy savings**, making it a sound investment for businesses prioritizing quality and operational efficiency.

However, if **budget constraints** or **low-load applications** are the primary concerns, alternatives from reputable brands (e.g., ABB, WEG, or even high-quality generic motors) may offer comparable performance at a lower cost. **Prospective buyers should weigh the long-term benefits against upfront expenses** and ensure the motor aligns with their specific operational needs.

- You need a **highly reliable, efficient motor** for a critical application.

- Your budget allows for the **premium pricing** in exchange for long-term savings.

- You operate in an environment where **maintenance and spare parts availability** are not concerns.

- You plan to integrate it with **Siemens or compatible control systems**.

- Your application is **low-load or non-critical**, and cost efficiency is the top priority.

- You require **custom specifications** that Siemens does not readily support.

- You prefer **lower initial costs** and are willing to accept slightly less brand reputation (e.g., WEG, ABB, or trusted generic motors).

Ultimately, the decision depends on balancing **immediate expenses, long-term reliability, and operational fit**. For most industrial applications, the Siemens motor is a **strong, well-supported choice**.

Details:

Special Instructions. 2-Year MRO Shield Protection Plan Included. A new, unused item with no signs of wear. Most items are in stock when they listed.

Manufacturer Part Number: 1LA7090-4AA12. The product must be the original item shipped, with matching serial numbers if applicable. Siemens 1LA7090-4AA12 3-Phase Motor3-phase motor with rated power of 1.1 kW, 1500 RPM at 50Hz, B14 mounting, IP55 protection.Specifications Rated kW. Housing material: Ali.

Explosion safety TeX: No protection. Standard: IEC. The item has its original packaging but it is not sealed. Brake: No Brake.

Siemens 1LA7090-4AA12 3-Phase Motor Manufactured by SIEMENS.

part #: 1la70904aa12 prices

• $349.00-$463.69

specifications momaequ:

• brand: Siemens
• mpn: 1la7090-4aa12
• part type: Motor

general momaequ:

• Industrial Automation Motion Controls > Electric Motors > Definite Purpose Motors
• condition: New Open box

seller momaequ:

• # reviews: 20965
• city: San Antonio, Texas
• rating: 99.7%

offer momaequ:

• sold: 0
• best offers: True
• options: Ship-to-home
• started: February 12, 2026
• quantity: 1
• availability: In Stock

returns momaequ:

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

shipping momaequ:

• type: Calculated
• carrier: UPS, USPS
• transit: 5-8 Days
• cost: $74.45
• service: UPS Ground, USPS Ground Advantage, USPS Priority Mail, UPS Next Day Air
• class: Standard, Expedited, One-day

payments momaequ:

• wallet: Apple-pay
• other
• credit card: Discover

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