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Square D QO3030 30/30A Tandem Miniature Circuit Breaker
- 30/30A
- 1 Pole
- Plug-On
Square D
QO3030
30/30A Tandem Miniature Circuit Breaker
Brand
Square D
SKU
QO3030
Quantity
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Square D QO3030 - 30/30A Tandem Miniature Circuit Breaker
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Description
Delivering two 30A circuits in the footprint of a standard single-pole breaker, this tandem unit helps expand capacity in full panels. It provides reliable thermal-magnetic overcurrent protection for residential and commercial applications. Designed with a non-CTL plug-on configuration, it fits into older Square D QO load centers that do not utilize rejection clips. This allows for safe, code-compliant circuit additions in legacy enclosures. It features a 10 kAIC rating and Visi-Trip flag.Specifications
| Brand | Square D |
|---|---|
| Part Number | QO3030 |
| Series | QO |
| Amperage | 30/30A |
| Poles | 1 |
| Mounting Style | Plug-On |
| Voltage | 120/240VAC |
| Phase | 1 |
| AIC Rating | 10kA @ 120/240VAC |
| Frame Type | QO |
|---|---|
| Terminal Type | Pressure Plate |
| For Use With | Non-CTL QO Load Centers |
| Wire Gauge | 14-8 AWG (Al/Cu) |
| Max Wire | 8 AWG |
| Min Wire | 14 AWG |
| Trip Technology | Thermal Magnetic |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Fixed |
| Special Classification | Tandem |
|---|---|
| Available Options | Auxiliary Switch, Alarm Switch, Padlock Attachment |
| Standards | CSA C22.2 No. 5, HACR, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | Visual Trip Indicator, Tandem |
Product FAQs
8 answersIs the QO3030 compatible with Square D Homeline load centers?
No. QO series breakers feature a 3/4-inch width per pole and a specific plug-on mounting clip. They are not interchangeable with Homeline breakers, which use a 1-inch width format.
What does the 'Non-CTL' designation mean for the QO3030?
Non-CTL (Circuit Total Limiting) indicates this tandem breaker lacks a rejection clip. It is designed for use in older Square D QO load centers (typically pre-1968) that do not have physical restrictions against adding tandem breakers.
Can the QO3030 be used to supply a 240V load?
No. The QO3030 is a tandem breaker that provides two independent 120V circuits from a single pole space. Because both circuits draw from the same phase, it cannot supply 240V. A standard 2-pole QO breaker is required for 240V applications.
Is the QO3030 a direct replacement for the QOT3030?
No. The QO3030 is a non-CTL breaker without a rejection clip, designed for older panels. The obsolete QOT3030 was a CTL version with a rejection clip. The QO3030 will not seat properly in CTL-restricted panel slots that require the QOT rejection feature.
How does the QO3030 tandem configuration save panel space?
It houses two independent 30A, 120V circuits within a single 3/4-inch breaker casing. This allows you to add an additional circuit to a full panel without upgrading the entire load center, provided the panel accepts non-CTL tandems.
Does the QO3030 include GFCI or AFCI protection?
No. The QO3030 provides standard thermal-magnetic overcurrent and short-circuit protection. It does not include Ground Fault (GFCI) or Arc Fault (AFCI) circuitry.
Does the QO3030 feature a Visi-Trip indicator?
Yes. The QO3030 includes the Visi-Trip feature. When either of the 30A circuits trips, the handle snaps to a midpoint position and displays a highly visible red indicator flag, making it easy to identify the tripped circuit.
Is the QO3030 HACR rated?
Yes. The QO3030 is HACR rated, meaning it is approved for use with heating, air conditioning, and refrigeration equipment that requires this specific overcurrent protection designation.
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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