Square D Surgebreaker QO Type ...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$179.60
Square D Surgebreaker QO Type 1 Surge Protection Device, 25kA, 120/240 VAC

Square D Surgebreaker QO Type 1 Surge Protection Device, 25kA, 120/240 VAC

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Model: QO2175SB

In Stock (leaves warehouse same day if ordered before 3pm ET)

$179.60
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Square D Surgebreaker QO Type 1 Surge Protection Device, 25kA, 120/240 VAC

The Square D Surgebreaker QO is a Type 1 surge protection device (SPD) built for QO residential load centers and combination service entrance devices (CSEDs). Rated 25 kA surge current at 120/240 VAC, 1 phase, 3 wire, it delivers a 900 J surge energy rating with a 10 kA nominal discharge current and a response time under 50 ns for fast, reliable protection against damaging voltage transients. It is cULus Listed and built to UL 1449 and CSA C22.2 standards.

Key Features

  • Surge Current: Rated 25 kA for single-phase systems, providing robust protection against high-magnitude surge events.
  • Electrical Rating: 120/240 VAC, 1 phase, 3-wire configuration for QO residential load centers and CSEDs.
  • Surge Energy Rating: 900 J absorption capacity helps shield downstream circuits and equipment from transient damage.
  • Nominal Discharge Current: 10 kA rated discharge current for consistent clamping performance.
  • Response Time: Less than 50 ns for rapid clamping action when a surge event occurs.
  • Short Circuit Protection: 100 kA rating withstands high fault-current conditions.
  • Thermal Fuse Protection: Internal thermal fuse safely disconnects the unit at end of life.
  • Local Signalling: 1 green LED indicates normal operation status.
  • Quick Plug-On Installation: Simplifies mounting into compatible QO load centers.

Certifications & Compliance

  • cULus Listed
  • UL 1449 Listed
  • CSA C22.2 Compliant
  • NEMA 2 Degree of Protection

Technical Specifications

  • Warranty: 18 months
  • Warranty Period: 18 months
  • Sustainable Packaging: Yes
  • Mercury Free: Yes
  • Packaging Without Single Use Plastic: Yes
  • Tier Id: 1
  • ROHS Eur In Scope: Yes
  • Recycled Metal Content At Cr Level: 0 %
  • H And D Enrichment Function: SPD
  • H And D Enrichment Assignment: yes
  • Serviceability: No
  • With Recycled Cardboard: Yes
  • WEEE Product Category: 5
  • Response Time: < 50 ns
  • H And D Domain: Safety
  • Relationshiptype: Compatible relationship
  • Total Lifecycle Carbon Footprint: 250 kg CO2 eq.
  • China ROHS In Scope: No
  • Short Circuit Protection: 100 kA
  • Return Indicator: Y
  • Nema Degree Of Protection: NEMA 2
  • Take Back: No
  • Tier: 1

Typical Applications

  • QO Residential Load Centers
  • Combination Service Entrance Devices (CSEDs)
  • Single-Phase Electrical Distribution Systems
  • Panelboard Surge Protection Retrofits

Why Square D?

Square D backs the Surgebreaker QO with an 18-month warranty, cULus Listing, and thermal fuse protection that safely disconnects at end of life for dependable, code-compliant surge protection. Its mercury-free, quick plug-on design supports straightforward installation in QO load centers and CSEDs for reliable equipment protection.

Manufacturer Resources

Product Specs

Product Type:
Surge Protective Device
Voltage Rating:
120/240 VAC
Series:
Surgebreaker
Listing:
cULus
Standards:
UL 1449
Configuration:
3-Wire
Department:
Electrical
Product Group:
Circuit Protection
Product Subgroup:
Surge Protection
Product Height:
3.7 in
Product Width:
1.5 in
Product Depth:
2.6 in

Square D QO2175SB – Frequently Asked Questions

1) Will the Square D Surgebreaker QO2175SB fit into my existing QO load center?
The Surgebreaker QO2175SB is a plug-on device built for Square D QO residential load centers and combination service entrance devices (CSEDs). It is a 120/240 VAC, 1-phase, 3-wire unit, so it lands on a two-pole position fed from both legs plus neutral. The body measures 3.7 in high, 1.5 in wide and 2.6 in deep, so you need two adjacent open QO spaces and room in the gutter for the leads. It will not plug into an Eaton BR or Homeline interior.
2) Is a Type 1 SPD like the Surgebreaker QO allowed on the line side of the main breaker?
Type 1 is the classification for a device that may be connected on the line side of the service disconnect, which is why the Surgebreaker QO is used in combination service entrance devices as well as load centers. It is cULus Listed to UL 1449. Where you put it is still governed by the panel's own instructions and your inspector, but the Type 1 rating is what permits the service-entrance position a Type 2 device cannot take.
3) How do I know when a Surgebreaker QO needs to be replaced?
There is one green LED on the front. Lit means the device is protecting; dark means the internal thermal fuse has opened and the unit is at end of life. It is not serviceable, so a dark LED means swapping the whole device, not a part. For property managers doing panel walkthroughs, that single LED is the entire inspection.
4) Can I use this surge device on a 208Y/120 or three-phase panel?
No. The Surgebreaker QO2175SB is rated 120/240 VAC, 1-phase, 3-wire only. For a three-phase panelboard you need a three-phase SPD matched to that system voltage; installing a single-phase unit on a 3-phase service misapplies the MOV voltage ratings.
5) What's the difference between the Square D Surgebreaker QO and the Eaton BR surge devices?
They are bus-specific, which is the whole decision. The Surgebreaker QO2175SB plugs into Square D QO load centers; the Eaton BRNSURGE10 and BRPSURGE are BR-series devices for Eaton BR panels, with the BRPSURGE built for plug-on neutral interiors. Pick the one matching the panel brand you already have. The 25 kA, 120/240 VAC Surgebreaker is the QO-bus answer.
6) What is the Eaton equivalent of the Square D QO2175SB surge protective device?
For an Eaton BR load center, the closest counterparts are the Eaton BRPSURGE, a Type BR two-pole plug-on neutral surge protective device, and the Eaton BRNSURGE10, a BR Series two-pole 10 kA surge protective device. All three are two-pole plug-on SPDs that mount into a residential load center, but the QO2175SB is built for Square D QO panels and the Eaton units are built for Eaton BR panels, so the bus style decides which one you can use. The QO2175SB is rated 25 kA surge current at 120/240 VAC, 1-phase, 3-wire.
7) What surge rating does the Square D Surgebreaker QO2175SB actually have?
25 kA surge current rating with a 10 kA nominal discharge current (In) and a 900 J energy absorption rating. Clamping response is under 50 ns. It also carries a 100 kA short circuit current rating, which matters because the SPD has to sit on a service with available fault current at or below that figure.
8) Is this enclosure rated for outdoor or wet locations?
The Surgebreaker QO carries NEMA 2 degree of protection, which is a dripproof indoor rating. It is meant to live inside the load center or CSED enclosure, and the enclosure, not the SPD, provides the environmental rating. Do not mount it exposed outdoors.
9) Can I add a Surgebreaker QO to a load center that's already installed and fully loaded?
Retrofitting an existing QO panel is one of its stated applications, but it needs two free adjacent breaker spaces to plug onto. If the interior is full, you would have to free up positions, for example by consolidating two single-pole circuits onto a tandem where the panel schedule permits it. The device itself is 1.5 in wide and 3.7 in high, so clearance inside the can is rarely the constraint; open spaces are.
10) How does the 10 kA Eaton BRNSURGE10 compare with the Square D Surgebreaker QO on surge rating?
The Eaton BRNSURGE10 is a BR Series two-pole device rated 10 kA, while the Square D Surgebreaker QO2175SB is rated 25 kA surge current with a 900 J surge energy rating and a 10 kA nominal discharge current. If you are specifying by surge current for a QO panel, the QO2175SB carries the higher 25 kA figure; the BRNSURGE10 is the two-pole option on the Eaton BR side.
11) Which surge device should I standardize on across a multi-family property with mixed panel brands?
Standardize by panel, not by one part number. Units with Square D QO load centers or combination service entrance devices take the Surgebreaker QO2175SB, a cULus Listed, UL 1449 device rated 120/240 VAC, 1-phase, 3-wire with a green LED showing normal operation. Units with Eaton BR panels take an Eaton BR device such as the BRPSURGE plug-on neutral model or the two-pole BRNSURGE10. Stocking one per panel family keeps every install a plug-on job.
12) What should I use instead of the QO2175SB if the panel has a plug-on neutral bus from Eaton?
Use the Eaton BRPSURGE, which is specifically a Type BR two-pole plug-on neutral surge protective device. The Square D Surgebreaker QO2175SB is the plug-on choice for QO residential load centers and CSEDs, occupying a two-pole space at 1.5 in wide, 3.7 in high and 2.6 in deep.
13) Will one Surgebreaker QO at the panel protect sensitive electronics, or do I still need point-of-use protection?
A service-entrance Type 1 device like this one takes the large external transients, 25 kA with 900 J of absorption and sub-50 ns clamping. It is the first layer. For computers, AV, and medical or lab equipment, the usual practice is to pair panel-level protection with point-of-use SPDs at the receptacle, because surges also originate downstream inside the building.
14) Where is the Square D Surgebreaker QO2175SB made, and what's the exact part number to order?
Order it as Square D QO2175SB. It is manufactured in Mexico, which is the detail institutional and government buyers working to domestic-preference rules usually need up front.
How fast can I get the Square D QO2175SB delivered?
Most orders ship the same day from our distribution partners, with quick delivery throughout the continental U.S. Need it urgently? Contact Us for expedited shipping options.
Can I return it if it doesn’t work for me?
Yes—ZenSupply offers a hassle-free return policy. If the product isn’t the right fit, reach out to our support team for a return authorization or setup a return by following our return instructions.
Does the Square D QO2175SB come with a warranty?
Absolutely. The Square D QO2175SB is backed by a manufacturer’s warranty. For full warranty terms, check the product documentation or Contact Us.
How do I get technical support or installation help for the Square D QO2175SB?
You can call, text, or email our expert support team for fast answers. We’re here to help with product selection, installation tips, and troubleshooting. Contact Us
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