A21.3 SQUARE D Overload Relay Thermal Unit Fnob

Review SQUARE D Squarea21.3 21.3 Overload Relay Thermal Unit Fnob

Introducing the A21.3 21.3 Overload Relay Thermal Unit FNOB, a sophisticated electrical component designed to ensure the safety and efficient operation of your electrical systems. This overload relay thermal unit, manufactured by FNOB, features a square design with dimensions of 21.3 centimeters by 21.3 centimeters, making it a versatile option for various applications.

The A21.3 21.3 Overload Relay Thermal Unit is an essential accessory for electrical systems, as it is engineered to protect against overloads and potential thermal damage. This unit employs a thermal overload protection mechanism that monitors the electrical current flowing through the circuit. If the current exceeds a predetermined safe limit, the thermal unit will automatically trip the circuit, preventing damage to the electrical components and ensuring the safety of the users.

The A21.3 21.3 Overload Relay Thermal Unit is a heavy-duty component, capable of handling high current loads. It is designed with an overload capacity of 20 amperes, ensuring it can manage the electrical demands of even the most power-hungry systems. Additionally, it is rated for a voltage of 250 volts, making it suitable for use in a wide range of industrial and commercial applications.

The construction of the A21.3 21.3 Overload Relay Thermal Unit is robust and durable. It is encased in a high-quality, corrosion-resistant metal housing, ensuring it can withstand the rigors of industrial environments. The unit is also designed with a clear, tamper-evident thermal element, allowing users to easily monitor the thermal status of the unit.

Installation of the A21.3 21.3 Overload Relay Thermal Unit is straightforward and can be completed with minimal effort. It is designed with a standard mounting pattern, making it compatible with a wide range of mounting configurations. Additionally, it comes with clear and concise installation instructions, ensuring even those with little electrical experience can install it with confidence.

In summary, the A21.3 21.3 Overload Relay Thermal Unit FNOB is an indispensable component for any electrical system, offering robust thermal protection against overloads and ensuring the safety and efficient operation of your electrical components. With its square design, heavy-duty construction, and ease of installation, it is a top choice for industrial and commercial applications.

A Square D A21.3 21.3 overload relay thermal unit FNOB (Fast Nova Overload) is an electrical protection device designed to prevent overloads and overheating in electrical circuits. Here are some pros and cons of buying this specific model:

1. Fast protection: The FNOB technology provides fast response times to prevent electrical faults and minimize damage to equipment and circuits.

2. Versatile application: This overload relay can be used in various types of electrical systems, including motors, heating elements, and lighting circuits.

3. Easy installation: The unit is designed for easy installation and can be mounted in a variety of orientations.

4. Reliable: Square D is a well-known brand in the electrical industry, and this model is known for its durability and reliability.

5. Cost-effective: Compared to other protective devices, this overload relay is relatively affordable.

1. Limited capacity: The A21.3 21.3 model has a limited capacity, which may not be suitable for larger electrical systems or high power applications.

2. Limited compatibility: This model may not be compatible with all types of electrical systems, so it's essential to check the specifications before making a purchase.

3. Limited adjustability: The overload relay has limited adjustability options, which may not be suitable for applications requiring precise settings.

4. Manual reset: The unit requires manual reset after a fault, which can be time-consuming and inconvenient.

In conclusion, the Square D A21.3 21.3 overload relay thermal unit FNOB is a reliable and cost-effective solution for protecting electrical circuits from overloads and overheating. However, it may not be suitable for larger applications or those requiring precise settings or automatic reset. It's essential to consider the specific requirements of your electrical system before making a purchase.

If you need a more powerful or adjustable overload relay, you may want to consider other models with higher capacity or more advanced features. However, if you're looking for a cost-effective and easy-to-install solution for standard electrical applications, the Square D A21.3 21.3 overload relay thermal unit FNOB is a good option.

Details:

Squares 21.3 overload relay thermal unit manufactured by Square. The product must be the original item shipped, with matching serial numbers if applicable. A new, unused item with no signs of wear. 2-year MRI shield protection plan included.

Squares 21.3 overload relay thermal unit thermal . The item has its original packaging but it is not sealed. Manufacturer part number: A21.3. Special instructions.

Most items are in stock when they listed. Mounting style: unit. Type: thermal overload relay.

specifications genpurrelays:

• brand: Square D
• mpn: A21.3
• part type: Unit

offer genpurrelays:

• sold #: 10
• availability: in stock
• in stock #: 5
• prices: $16.00–$30.00
• item condition:
  • New
  • New – Open box
  • Seller refurbished
  • Used
• best offers: true
• started: december 5, 2025
• options: ship-to-home

general genpurrelays:

• category: Business & Industrial > Electrical Equipment Supplies > General Purpose Relays

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• class: standard, one-day
• service: ups ground, ups next day air
• transit: 4-8 days
• type: calculated
• carrier: ups

seller genpurrelays:

• # reviews: 18403
• city: mount sterling, kentucky
• rating: 99.5%

payments genpurrelays:

• wallet: apple-pay
• other
• credit card: visa

returns genpurrelays:

• paid by: buyer
• time: 30 days
• method: money back
• policy: returns accepted