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Square D QDA221751 Molded Case Circuit Breaker
- 175A
- 2 Pole
- I-Line
Square D
QDA221751
Molded Case Circuit Breaker
Brand
Square D
SKU
QDA221751
Quantity
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Square D QDA221751 - 175A 2 Pole Molded Case Circuit Breaker
New
Quantity
Quantity
Square D QDA221751 - 175A 2 Pole Molded Case Circuit Breaker
New
Quantity
| Brand | Square D |
|---|---|
| Part Number | QDA221751 |
| Series | QDA |
| Amperage | 175A |
| Poles | 2 |
| Mounting Style | I-Line |
| Voltage | 208Y/120VAC, 240VAC |
| Phase | 1 |
| AIC Rating | 25kA @ 208Y/120VAC, 25kA @ 240VAC |
| Frame Type | QDA |
|---|---|
| Terminal Type | Lugs |
| For Use With | Square D I-Line Panelboards, Switchboards |
| Wire Gauge | 4 AWG - 300 kcmil (Al/Cu) |
| Max Wire | 300 kcmil |
| Min Wire | 4 AWG |
| Trip Technology | Thermal Magnetic |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Fixed Thermal, Fixed Magnetic |
| Available Options | Shunt Trip, Auxiliary Switch, Undervoltage Release, Alarm Switch, Padlock Attachment |
|---|---|
| Accessories | Phase Connection AB |
| Standards | CSA C22.2 No. 5, HACR, IEC 60947-2, NEMA AB 1, UL 489 |
| Approval | CSA, IEC, NOM, UL |
| Temp Rating | -25C to 70C |
| Construction Features | HACR Rated, Visual Trip Indicator, Non-Interchangeable Trip |
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Quantity
Square D QDA221751 - 175A 2 Pole Molded Case Circuit Breaker
Re-Certified
Quantity
| Brand | Square D |
|---|---|
| Part Number | QDA221751-R |
| Series | QDA |
| Amperage | 175A |
| Poles | 2 |
| Mounting Style | I-Line |
| Voltage | 208Y/120VAC, 240VAC |
| Phase | 1 |
| AIC Rating | 25kA @ 208Y/120VAC, 25kA @ 240VAC |
| Frame Type | QDA |
|---|---|
| Terminal Type | Lugs |
| For Use With | Square D I-Line Panelboards, Switchboards |
| Wire Gauge | 4 AWG - 300 kcmil (Al/Cu) |
| Max Wire | 300 kcmil |
| Min Wire | 4 AWG |
| Trip Technology | Thermal Magnetic |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Fixed Thermal, Fixed Magnetic |
| Available Options | Shunt Trip, Auxiliary Switch, Undervoltage Release, Alarm Switch, Padlock Attachment |
|---|---|
| Accessories | Phase Connection AB |
| Standards | CSA C22.2 No. 5, HACR, IEC 60947-2, NEMA AB 1, UL 489 |
| Approval | CSA, IEC, NOM, UL |
| Temp Rating | -25C to 70C |
| Construction Features | HACR Rated, Visual Trip Indicator, Non-Interchangeable Trip |
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Description
Engineered for commercial applications, the Square D QDA221751 is a 2-pole molded case circuit breaker from the PowerPacT Q-Frame family. It delivers reliable thermal-magnetic protection for demanding electrical systems. This unit mounts into Square D I-Line panelboards and switchboards, utilizing an AB phase connection. It serves as a replacement for the legacy Q221751 breaker. Rated for 25kAIC at 240V, this HACR-rated breaker includes a Visi-Trip indicator for quick fault identification.Specifications
| Brand | Square D |
|---|---|
| Part Number | QDA221751 |
| Series | QDA |
| Amperage | 175A |
| Poles | 2 |
| Mounting Style | I-Line |
| Voltage | 208Y/120VAC, 240VAC |
| Phase | 1 |
| AIC Rating | 25kA @ 208Y/120VAC, 25kA @ 240VAC |
| Frame Type | QDA |
|---|---|
| Terminal Type | Lugs |
| For Use With | Square D I-Line Panelboards, Switchboards |
| Wire Gauge | 4 AWG - 300 kcmil (Al/Cu) |
| Max Wire | 300 kcmil |
| Min Wire | 4 AWG |
| Trip Technology | Thermal Magnetic |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Fixed Thermal, Fixed Magnetic |
| Available Options | Shunt Trip, Auxiliary Switch, Undervoltage Release, Alarm Switch, Padlock Attachment |
|---|---|
| Accessories | Phase Connection AB |
| Standards | CSA C22.2 No. 5, HACR, IEC 60947-2, NEMA AB 1, UL 489 |
| Approval | CSA, IEC, NOM, UL |
| Temp Rating | -25C to 70C |
| Construction Features | HACR Rated, Visual Trip Indicator, Non-Interchangeable Trip |
Product FAQs
8 answersWhat does the '1' at the end of the QDA221751 catalog number indicate?
The '1' suffix specifies that this breaker is configured for an AB phase connection in an I-Line panelboard. Other variants include the QDA221752 for AC phase and QDA221754 for BC phase connections.
What panels are compatible with the QDA221751 breaker?
This breaker is designed exclusively for Square D I-Line panelboards and switchboards. It features an I-Line plug-on connection on the line side and mechanical lugs on the load side.
Can I use the QDA221751 to replace an older Q2 series breaker?
Yes, the PowerPacT Q-Frame QDA221751 is a direct replacement for the legacy Square D Q221751 circuit breaker.
How does the QDA frame compare to other Square D Q-Frame breakers like the QBA or QGA?
The primary difference is the interrupting rating. The QDA frame provides 25kAIC at 240VAC, whereas the QBA frame is rated for 10kAIC, the QGA for 65kAIC, and the QJA for 100kAIC.
What is the recommended tightening torque for the load-side lugs on this breaker?
The load-side lugs accept 4 AWG to 300 kcmil aluminum or copper wire and should be torqued to 248 lb-in (28 N.m) during installation.
Does this breaker include a push-to-trip feature for testing?
Yes, all PowerPacT Q-Frame circuit breakers feature an integral push-to-trip button on the cover, allowing you to manually trip the breaker to verify the mechanical operation.
What safety precautions should be taken before installing this I-Line breaker?
Always de-energize the panelboard or switchboard before installation. Ensure the breaker is in the OFF or TRIPPED position before engaging the I-Line jaws onto the bus assembly to prevent arcing.
Is the QDA221751 rated for continuous loads at 100% of its capacity?
No, this is a standard-rated breaker, meaning it is rated for continuous operation at 80% of its 175-amp capacity.
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Reviews
Review summary
Customers rate this product 5.0 out of 5 based on 6 reviews.
Total 5 star reviews: 6 Total 4 star reviews: 0 Total 3 star reviews: 0 Total 2 star reviews: 0 Total 1 star reviews: 0
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Rating
6 reviews
- CBCarl B.Verified BuyerReviewingSquare D QDA32125 - 125A 3 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars6/11/26Sq. D I-line
Price was fair for these New Breakers. More importantly, is the avaiability and not having to deal with long lead times
- CSClaus S.Verified BuyerReviewingSquare D QDA32100 - 100A 3 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars3/3/26100A 3 phase Breaker
Priced right and shipping was really Quick. I will use them again!!
- CGChase G.ReviewingSquare D QDA32150 - 150A 3 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars3/16/22Always have what I need
5 stars Super Breaker always has what I need, and at a good price.
- CGChristopher G.ReviewingSquare D QDA32100 - 100A 3 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars8/11/21speedy service. great quality
speedy service. great quality
- RSRandy S.ReviewingSquare D QDA32225 - 225A 3 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars9/11/19Super
Quick Shipping and great price