Square D QOB345-1021

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  • ID: #6961
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  • Availability: 7 In Stock
  • $154.08

QOB345-1021 – Square D Bolt-on Circuit Breaker with Shunt Trip

• Authentic Square D Product
• Thermal Magnetic, Common Trip
• 3 Pole
• 120 / 240 Vac
• 45?Ampere
• Interrupting Rating 10 Kiloampere
• Wire Size 14 To 8 Awg (Copper), 12 To 8 Awg (Aluminum)
• 1 Inch Bolt On Mounting
• Size 3 Inch W X 2 3/8 Inch D X 3 9/32 Inch H
• Approval Ul
• Used On QOB Series Load Centers
• QOB Model

Type QOB Circuit Breakers are unique circuit breakers that provide effective over current protection and can also used as switches for AC and DC systems. QOB circuit breakers are utilized for NQOB, NQOD and NQ panel boards only.

These circuit breakers have been brilliantly engineered to perfection as the tripping mechanism has been built in such a way that any sudden over current will cause the 1 poles and all of the poles in 2 and 3 pole Circuit Breakers to trip simultaneously. Furthermore, each pole included in the mechanism has a thermal-magnetic trip element that is precisely calibrated for 40c temperature.

Trip indication

This circuit breaker has a Visi-trip® which provides a visual indication when the circuit breaker has tripped. Whenever the circuit breaker trips the handle that is located at the center of the breaker will respond in such a manner that it will assume a center position and the indicator will appear in a window indicating that a circuit breaker has tripped.

This window will only appear when a breaker has tripped and can easily be rectified by merely turning the handle to off or on. This Visi-trip® indicator is currently the only trip indicator in the market and it has helped achieve the high market share that OOB circuit breakers have in the market today. Given below is a selection of 10KA rated circuit breakers:

  1. QOB one pole standard circuit breakers (10A -70A)
  2. QOB two pole standard circuit breakers (10A-200A)
  3. Three pole standard circuit breakers (10A – 100A)
  4. Factory installed accessories
  5. QOB ground fault circuit indicators


The QOB circuit breaker has cemented its position in the market today due to the array of benefits that it provides and because of its applications. Some of the most profound applications of this circuit breaker are mentioned below,

  • Commercial and industrial lighting system protection
  • High interruption capabilities
  • Short current protection
  • Over current protection
  • Series arc protection
  • Parallel arc protection
  • Ground fault protection


As mentioned before the QOB circuit breaker provides an extensive range of benefits, some of the most prominent benefits of this circuit breaker are as follows.

  • Fast and effective troubleshooting
  • Does not require pigtails as it includes a plug on neutral design
  • Easy to install
  • Does not require extensive connections
  • Multiple applications
  • Renowned circuit protection
  • Includes Visi-trip®

**Free Shipping on orders over $100.00 for the Continental USA**

Shipping charge on orders below $100.00 will be a flat fee of $9.00

Need it Tomorrow?

Overnight and Expedited Shipping is available, (additional charge will apply) and orders must be called in prior to 4:00 pm PST.

*For Alaska, Hawaii and Puerto Rico

All orders for Alaska, Hawaii and Puerto Rico have an additional charge of $35.00 including orders over $100.00. Solar Generators or freight shipments cannot be shipped to Alaska, Hawaii and Puerto Rico.

If any special shipping arrangements need to be made, please call and we will make sure you receive your order as you wish.

Most items ship from our location in Southern California and will be delivered in 1 to 7 work days depending on the delivery address. Items may ship UPS, USPS or Federal Express.

We strive to ship out your items the same day the order is placed, to help us accomplish this please refer to the following deadlines: If your item is shipping to a PO box, expect a 24 hour delay.

Called in orders prior to 4:00 pm PST will ship same day.

On-Line orders sent prior to 3:00 PST will ship same day, (unless we need to order it for you).

Thank you and feel free to call 800-743-1851 if you have any questions.