SQUARE D QO140 Qo Circuit Breaker Plug 40A 120/240VAC 1-POLE

( Brand: Square D ), ( Interruption Type: Thermal Trip Manual Reset ), ( Condition Description: Used Good Condition ), ( Custom Bundle: No ), ( Manufacturer Part Number: QO140 ), ( Voltage: 120/240 Vac ), ( Style: Traditional ), ( Features: Trip Indicator ), ( Finish: Black ), ( Mounting Style: Clip-on ), ( Maximum Amperage: 40 A ), ( Device Type: Circuit Breaker ), ( California Prop 65 Warning: These Products May Contain A Chemical Known To The State Of Calif ), ( Operation Method: On/off ), ( Recommended Environment: Indoor ), ( Application: Branch Circuit )

Review SQUARE D Squareqo140 Qo Circuit Breaker 40a 120/240vac 1-pole Plug In Lot Of

The Square D QO140 QO Circuit Breaker is a reliable and efficient electrical safety solution designed for residential and light commercial applications. This circuit breaker is a 1-pole, single phase model, capable of handling alternating current (AC) voltage levels of 120 Volts or 240 Volts, and has a current rating of 40 Amperes.

The QO140 circuit breaker is part of Square D's popular QO series, known for its quick-acting, high-quality circuit protection. The QO series offers a range of breaker types, including ground-fault protection, and is suitable for use with various wiring methods, such as knob and tube, or Type B and C insulated cables.

This circuit breaker features a tamper-resistant design with a lockout cover that ensures the breaker remains in the "off" position, preventing accidental operation. It also includes a thermal magnetic trips mechanism that detects both overcurrent and overheating conditions, providing an additional layer of safety for your electrical system.

The QO140 circuit breaker is easy to install and is designed to fit standard single-gang electrical boxes. It measures 1.25 inches in width, 3.1 inches in height, and 2.3 inches in depth. Its rugged, corrosion-resistant construction ensures long-lasting performance and reliability.

In summary, the Square D QO140 QO Circuit Breaker is a versatile and dependable electrical safety device suitable for various residential and light commercial applications. With its 40 Amp, 120/240V AC rating and quick-acting, high-quality circuit protection, this circuit breaker provides peace of mind and helps ensure the safety and efficiency of your electrical system.

Pros and Cons of Buying a Square D QO140 QO Circuit Breaker (40A, 120/240VAC, 1-Pole, Plug)

A circuit breaker is an essential component of any electrical system. The Square D QO140 QO Circuit Breaker (40A, 120/240VAC, 1-Pole, Plug) is a popular choice due to its versatility and reliability. In this analysis, we will discuss the pros and cons of purchasing this circuit breaker to help you make an informed decision.

1. Versatility: This circuit breaker can be used for both 120V and 240V applications, making it suitable for a wide range of electrical systems.

2. Convenient Design: The plug-in design allows for easy installation without the need for additional wiring or junction boxes.

3. Safety: Square D is a trusted brand known for its commitment to safety. This circuit breaker comes with various safety features, such as overload protection and short-circuit protection.

4. Durability: The Square D QO140 circuit breaker is built to last, with a rugged design and high-quality components.

5. Compliance: This circuit breaker meets various industry standards, including UL and NEMA, ensuring its safety and reliability.

1. Limited Amperage: With a maximum amperage of 40A, this circuit breaker may not be suitable for high-demand applications.

2. Cost: Compared to other circuit breakers with similar specifications, the Square D QO140 circuit breaker may be more expensive.

3. Limited Applications: This circuit breaker is designed for specific applications, and may not be suitable for all electrical systems.

4. Limited Customization: The plug-in design limits the ability to customize the installation, as there are no options for additional terminals or custom configurations.

The Square D QO140 QO Circuit Breaker (40A, 120/240VAC, 1-Pole, Plug) offers several advantages, including versatility, convenience, safety, durability, and compliance. However, it also has some disadvantages, such as limited amperage, cost, limited applications, and limited customization.

If you require a circuit breaker for applications that require more than 40A, you may need to consider other options. Additionally, if you are looking for a more cost-effective solution or have unique installation requirements, you may need to explore other brands or models.

Based on the analysis, the Square D QO140 QO Circuit Breaker (40A, 120/240VAC, 1-Pole, Plug) is a reliable and versatile option for electrical systems that require a 40A circuit breaker with 120V and 240V capabilities. It offers several advantages, including convenience, safety, durability, and compliance. However, it may not be suitable for high-demand applications or those with unique installation requirements. If you need a circuit breaker with more amperage or customization options, you may need to explore other brands or models.

Details:

The Square QO Circuit Breaker is a reliable and efficient electrical component that offers thermal trip manual reset feature for added safety. The trip indicator helps you easily identify when a reset is needed, making it convenient for maintenance and troubleshooting. With a voltage rating of 120/240VAC and an amperage 40A, this 1-pole circuit breaker is suitable for indoor use designed with traditional black finish. This lot of 3 Square QO Circuit Breakers, model QO140, is a durable and high-quality option for your electrical panel needs.see photos used but in good condition.

part #: qo140 prices

• $14.85-$15.00

specifications breakercoon:

• brand: Square D
• interruption type: Thermal Trip Manual Reset
• condition description: Used Good Condition
• custom bundle: No
• manufacturer part number: QO140
• voltage: 120/240 Vac
• style: Traditional
• features: Trip Indicator
• finish: Black
• mounting style: Clip-on
• maximum amperage: 40 A
• device type: Circuit Breaker
• california prop 65 warning: These Products May Contain A Chemical Known To The State Of Calif
• operation method: On/off
• recommended environment: Indoor
• application: Branch Circuit

offer breakercoon:

• availability: In Stock
• sold: 0
• started: January 25, 2026
• best offers: True
• options: Ship-to-home
• quantity: 1

payments breakercoon:

• credit card: Diners-club
• wallet: Apple-pay
• other

returns breakercoon:

• policy: No Returns

shipping breakercoon:

• type: Fixed
• carrier: USPS
• transit: 4-9 Days
• class: Standard
• cost: $6.00
• service: USPS Ground Advantage

general breakercoon:

• condition: Used
• Electrical Supplies > Electrical Panels, Boxes Circuit Breakers > Circuit Breakers

seller breakercoon:

• # reviews: 543
• city: Fort Smith, Arkansas
• rating: 99.5%

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