Square D QOU2301021 Miniature Circuit Breaker
- 30A
- 2 Pole
- Unit Mount
Quantity
Square D QOU2301021 - 30A 2 Pole Miniature Circuit Breaker
New
Quantity
Description
Part of the QOU series, the Square D QOU2301021 combines standard thermal-magnetic protection with advanced control capabilities. This 30A, two-pole breaker is engineered for commercial applications requiring dependable power management. The unit-mount construction permits installation outside conventional load centers, perfect for DIN rail setups and custom enclosures. It features a factory-installed shunt trip for remote operation, an HACR certification, and a Visi-Trip indicator.Specifications
| Brand | Square D |
|---|---|
| Series | QOU |
| Amperage | 30A |
| Poles | 2 |
| Mounting Style | Unit Mount |
| Voltage | 120/240VAC |
| Phase | 1 |
| AIC Rating | 10kA @ 120/240VAC |
| Frame Type | QOU |
|---|---|
| Terminal Type | Box Lugs |
| For Use With | DIN Rail Systems, OEM Panels, Control Panels |
| Wire Gauge | 14-2 AWG (Al/Cu) |
| Max Wire | 2 AWG |
| Min Wire | 14 AWG |
| Trip Technology | Thermal Magnetic |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Fixed |
| Available Options | Mounting Feet, Padlock Attachment, Finger Safe Covers |
|---|---|
| Accessories | Shunt Trip (Factory Installed) |
| Standards | CSA C22.2 No. 5, IEC 60947-2, NEMA AB 1, UL 489 |
| Approval | CSA, HACR, IEC, UL |
| Temp Rating | 40C |
Product FAQs
8 answersWhat does the "1021" suffix indicate on the QOU2301021 breaker?
The 1021 suffix means this breaker includes a factory-installed 120/240VAC shunt trip accessory. This allows the breaker to be tripped remotely when a voltage signal is applied to the shunt trip terminals.
Can I install the QOU2301021 in a standard Square D QO load center?
No. While it is part of the QO family, the QOU series features a unit-mount, feed-thru design (cable-in/cable-out). It does not plug onto or bolt onto the busbars of standard QO or NQ residential and commercial load centers.
How is the QOU2301021 breaker mounted?
This unit-mount breaker is designed for surface mounting, flush mounting, or installation on standard DIN rails using the appropriate mounting hardware. It is commonly used in custom control panels and OEM equipment.
What type of wire connections does this breaker use?
It features feed-thru box lugs on both the line and load sides, accepting 14 AWG to 2 AWG aluminum or copper (Al/Cu) conductors.
Is the QOU2301021 rated for use in DC circuits?
Yes, in addition to its standard 120/240VAC rating, this thermal-magnetic breaker is rated for use in DC applications up to 48VDC.
How does the shunt trip function improve safety in control panels?
The factory-installed shunt trip allows for remote tripping of the breaker. This is frequently used to tie the breaker into emergency stop (E-stop) circuits, fire alarms, or automated safety shutdown systems to instantly cut power when a hazard is detected.
What type of trip protection does the QOU2301021 provide?
It utilizes a fixed thermal-magnetic trip mechanism with Long-Time and Instantaneous (LI) trip functions. The thermal element protects against prolonged overloads, while the magnetic element provides instantaneous protection against short circuits.
Does the QOU2301021 feature a visual trip indicator?
Yes, like most breakers in the QO family, it includes the Visi-Trip indicator. When the breaker trips due to an overcurrent condition or a shunt trip signal, a highly visible red indicator appears in the window to help quickly identify the tripped circuit.
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Reviews
Review summary
Customers rate this product 5.0 out of 5 based on 106 reviews.
- HLHOMETIGO L.Verified BuyerReviewingSquare D QOU260 - 60A 2 Pole Miniature Circuit BreakerI recommend this productRated 5 out of 5 stars9/7/26Good thing
i recommend this for you
- RGRobert G.Verified BuyerReviewingSquare D QOU340 - 40A 3 Pole Miniature Circuit BreakerI recommend this productRated 5 out of 5 stars9/3/26Circuit breakers
I appreciate the fact that you had these in stock. my Square D distributor does not seem to stock these anymore and it takes a couple weeks to get. your pricing is inline with theirs.
- THTiffany H.Verified BuyerReviewingSquare D QOU115 - 15A 1 Pole Miniature Circuit BreakerI recommend this productRated 5 out of 5 stars8/28/26Will use Super Breakers again
Arrived in a timely manner. Exactly what we needed for a job.
- CSCary S.Verified BuyerReviewingSquare D QOU250 - 50A 2 Pole Miniature Circuit BreakerI recommend this productRated 5 out of 5 stars8/12/26Just what I ordered
Just what I needed for dock pedestal
- MHMark H.Verified BuyerReviewingSquare D QOU250VH - 50A 2 Pole Miniature Circuit BreakerI recommend this productRated 5 out of 5 stars8/11/26Square D QOU250VH - 50A 2 Pole Miniature Circuit Breaker
Was just what I expected!