Square D QO2175SB Review

Read time: 3 minutes Last Updated: 01/10/2020

Schneider Electric QO2175SB

  • Affordably priced at just over $50
  • Fully compatible with QO load centers
  • Individually-fused MOVs and short lead lengths provide great surge suppression performance up to 22,500 amps
  • 3-year warranty covers $10,000 in damages to major appliances
  • Warranty period is rather brief, especially when factoring manufacturing date
2.5 x 1.5 x 3.5 inches
8.6 ounces
Maximum Surge Current Capacity (MSCC):
22,500 amps
Enclosure Type:
Alarm or Indicator Light:
Yes 3 years (or 2 years after installation)
Our Review

Let’s get one thing out of the way early – it is truly surprising that the Schneider Electric QO2175SB only costs around $50. Few other models from Schneider Electric or its competitors manage to provide such a bargain while still packing in reliable construction and performance. This affordable price tag is made even more noteworthy for its inclusion of a 2-3 year warranty (depending on when the unit was manufactured and purchased).

Price aside, the Schneider Electric QO2175SB’s internal components go the extra mile when it comes to protecting your home from up to 22,500 volts of surge electricity. For example, this model’s use of individually-fused MOVs and short lead lengths ensures that it is able to respond instantly to incoming surges while still ensuring that only 700-1,500 volts safely make it through to your critical appliances.

Also, as this model’s name implies, the Schneider Electric QO2175SB is fully compatible with other QO load centers. As a result, homeowners who are looking to unify their whole home surge protection protocols can invest in this unit while simultaneously switching to an all-QO load center.

Read more about our how our ratings broke down for the QO2175SB below or checkout how it compares to other whole surge protectors.

Key Specification Ratings

Maximum Continuous Operating Voltage (MCOV) – 7.5/10

Why Did It Earn this Score? – As far as MCOVs go, the Schneider Electric QO2175SB doesn’t do much to distinguish itself from the pack. That’s okay, though, because this model’s primary use in light industrial and residential environments allows its two differentiated MCOVs to meet user’s surge protection goals. So, if your whole home surge protection needs only call for 150-300 volts of MCOV, then this model’s L-N and L-L modes will serve you well.

Voltage Protective Rating (VPR) – 9/10

Why Did It Earn this Score? – Schneider Electric has a variety of modular surge protectors available right now, but few manage to match the QO2175SB model when it comes to VPR. This model’s low-end VPR, 700 volts, is higher alone than the high VPR settings on other models offered by this manufacturer. Meanwhile, this model’s top VPR, 1,500 volts, blows other compact surge protection devices out of the water while remaining entirely affordable.

Mode of Protection – 7.0/10

Why Did It Earn this Score? – While the Schneider Electric QO2175SB may excel in VPR, it still suffers from an issue seen in other surge protectors from this manufacturer – the bare minimum when it comes to modes of protection. Specifically, this model only allows users to utilize the common L-N and L-L modes, while leaving L-G and N-G by the wayside. While this isn’t a major issue for most users, seasoned surge protector users may need to look elsewhere for more operational options.

Cumulative Score Average – 7.9/10

Though its modes of protection and MCOVs leave a bit to be desired, the Schneider Electric QO2175SB is a worthwhile choice that will reliably ensure that your home is protected from external surges of up to 22,500 amps. While it performs best with a QO load center, this model’s individually fused MOVs will perform effectively regardless of your chosen indoor set up. Also, the Schneider Electric QO2175SB drives an undeniable bargain, between its approximately $50 price tag and its multi-year warranty.