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Square D QO220-1021 QO2201021 - 20A 2 Pole Miniature Circuit Breaker
- 20A
- 2 Pole
- Plug-On
Square D
QO220-1021
QO2201021 - 20A 2 Pole Miniature Circuit Breaker
Brand
Square D
SKU
QO220-1021
Quantity
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Square D QO2201021 - 20A 2 Pole Miniature Circuit Breaker
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Description
Part of the QO series, the Square D QO220-1021 provides 20A thermal-magnetic protection with the added functionality of a factory-installed shunt trip. This allows the breaker to be tripped remotely via a 120/208/240VAC control signal, making it ideal for commercial and industrial safety systems. It installs into standard QO load centers and NQ panelboards using a simple plug-on connection. This 2-pole breaker features a 10 kAIC rating and includes the Visi-Trip visual indicator.Specifications
| Brand | Square D |
|---|---|
| Part Number | QO2201021 |
| Series | QO |
| Amperage | 20A |
| Poles | 2 |
| Mounting Style | Plug-On |
| Voltage | 120VAC, 120/240VAC, 48VDC |
| Phase | 1 |
| AIC Rating | 10kA @ 120VAC, 10kA @ 120/240VAC, 5kA @ 48VDC |
| Terminal Type | Pressure Plate |
|---|---|
| For Use With | QO Load Centers, NQ Panelboards |
| Wire Gauge | 14-8 AWG (Cu/Al) |
| Max Wire | 8 AWG |
| Min Wire | 14 AWG |
| Trip Technology | Thermal Magnetic |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Fixed |
| Available Options | Padlock Attachment |
|---|---|
| Accessories | Shunt Trip |
| Standards | CSA C22.2 No. 5, HACR, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | Visual Trip Indicator, HACR Rated |
Product FAQs
8 answersWhat does the 1021 suffix indicate on the QO2201021 part number?
The 1021 suffix designates a factory-installed shunt trip accessory. This allows the breaker to be tripped remotely via a 120VAC to 240VAC control signal, which is commonly used in commercial safety and emergency shutdown systems.
Which load centers and panelboards are compatible with the QO220-1021?
This plug-on breaker installs into standard Square D QO load centers, NQ panelboards, NQOD panelboards, and OEM interior or speed switchboard distribution panels.
What is the difference between the QO2201021 and QOB2201021?
The QO2201021 is a plug-on circuit breaker designed for QO load centers and compatible panels. The QOB2201021 is the bolt-on equivalent, which is required for certain NQ and NQOD panelboard configurations that specify bolt-on connections.
How is the shunt trip accessory on the QO2201021 powered?
The factory-installed shunt trip requires an external 120VAC to 240VAC control voltage source to operate. When this control voltage is applied to the shunt trip coil, it mechanically trips the breaker open.
What are the terminal specifications for the QO220-1021?
The breaker is equipped with pressure plate terminals that accept 14 AWG to 8 AWG copper or aluminum conductors. Ensure proper torque is applied during installation as specified by the manufacturer to maintain a secure connection.
Is the QO2201021 suitable for both AC and DC applications?
Yes, this thermal-magnetic breaker is dual-rated. It provides a 10kAIC interrupting rating for standard 120/240VAC systems and a 5kAIC rating for 48VDC systems, making it versatile for both AC distribution and DC control circuits.
Does the QO2201021 include a visual trip indicator?
Yes, this breaker features the Square D Visi-Trip indicator. When the breaker trips due to an overload, short circuit, or a remote shunt trip signal, a red indicator appears in the window for quick identification.
How does the thermal-magnetic trip mechanism function on the QO2201021?
The fixed thermal-magnetic trip unit uses a bimetallic strip for long-time delay to handle sustained overloads, and an electromagnetic assembly for instantaneous tripping during severe short circuits.
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Reviews
Review summary
Customers rate this product 4.9 out of 5 based on 285 reviews.
Reviews Summary
Generated by AI from 100 most recent customer reviews
Last updated 6/13/26
Customers say these circuit breakers arrive quickly and work as described. Fast shipping and competitive pricing are frequently mentioned, with many noting same-day or next-day delivery. Users appreciate the wide inventory, particularly for hard-to-find older-style models unavailable locally. The products function reliably and arrive in good condition. Most customers report straightforward ordering and positive interactions. However, some experienced delivery delays or received incorrect items requiring reordering. A few noted concerns about condition upon arrival or customer service responsiveness.
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Rating
285 reviews
- GCGerard C.Verified BuyerReviewingSquare D QO130GFI - 30A GFCI Miniature Circuit BreakerI recommend this productRated 5 out of 5 stars9/21/26Great !
I could not find the breaker in hardwood stores. Superbreakers took car of it in a week.
- RHRoy H.Verified BuyerReviewingSquare D QO280 - 80A 2 Pole Miniature Circuit BreakerI recommend this productRated 5 out of 5 stars9/17/26Square D QO280 - 80A 2 Pole Miniature Circuit Breaker
Exactly as described
- KWKevin W.Verified BuyerReviewingSquare D QO120 - 20A 1 Pole Miniature Circuit BreakerI recommend this productRated 5 out of 5 stars9/15/26Great Price
Brand spanking new!
- CEchristopher e.Verified BuyerReviewingSquare D QO115PDF - 15A Dual Function Miniature Circuit BreakerI recommend this productRated 5 out of 5 stars9/11/26My breakers
Had a hard time locating these breakers locally, when I did find 1 they wanted to charge me triple what superbreakers charged. Items delivered exactly when they said they would, were exactly what I ordered. Appreciated the ease of ordering, definitely my go to from this point on
- JCJerry C.Verified BuyerReviewingSquare D QO250 - 50A 2 Pole Miniature Circuit BreakerI recommend this productRated 5 out of 5 stars9/8/26Great quality
No issues