Skip to main content
Expedited shipping available at checkout

Square D QDA221501 Molded Case Circuit Breaker

  • 150A
  • 2 Pole
  • I-Line
Square D QDA221501
Molded Case Circuit Breaker
Brand Square D
SKU QDA221501
Select Item Condition
Earn 656 SuperPoints
  • 150A
  • 2 Pole
  • I-Line

Quantity

Bulk Pricing
Send your parts list for a volume quote.
Square D QDA221501 2 Pole Circuit Breaker

Square D QDA221501 - 150A 2 Pole Molded Case Circuit Breaker

New

$656.60 In Stock

Quantity

Similar Items

Description

Built for demanding electrical systems, the Square D QDA221501 is a 150A, 2-pole molded case circuit breaker from the PowerPacT Q-Frame series. Equipped with an I-Line mounting bracket, it easily plugs into Square D I-Line panelboards and switchboards. This model is an exact replacement for the discontinued Q221501 breaker. The breaker provides a 25kAIC rating at 240VAC and utilizes fixed thermal-magnetic trip technology (LI). It is configured with an AB phase connection.

Specifications

Key specifications
Brand Square D
Part Number QDA221501
Series QDA
Amperage 150A
Poles 2
Mounting Style I-Line
Voltage 208Y/120VAC, 240VAC
Phase 1
AIC Rating 25kA @ 208Y/120VAC, 25kA @ 240VAC
Fit and installation
Frame Type QDA
Terminal Type Lugs
For Use With Square D I-Line Panelboards
Wire Gauge 4 AWG - 300 kcmil (Al/Cu)
Max Wire 300 kcmil
Min Wire 4 AWG
Protection and operation
Trip Technology Thermal Magnetic
Trip Function Code LI
Trip Function Long-Time, Instantaneous
Trip Adjustability Fixed Thermal, Fixed Magnetic
Standards and features
Available Options Shunt Trip, Auxiliary Switch, Alarm Switch, Padlock Attachment
Accessories Load Side Lugs Included
Standards CSA C22.2 No 5, HACR, IEC 60947-2, NEMA AB 1, NOM-003-SCFI-2000, UL 489
Approval CE, CSA, IEC, NOM, UL
Temp Rating -25C to 70C
Construction Features HACR Rated, Visual Trip Indicator, Non-Interchangeable Trip, Quick-Make/Quick-Break, Trip-Free Mechanism, Common Trip

Product FAQs

7 answers
Which panelboards are compatible with the QDA221501 circuit breaker?

This breaker features an I-Line plug-on connection and is designed exclusively for use in Square D I-Line panelboards and switchboards. It will not fit NQ, NF, QO, or Homeline load centers.

What does the 1 at the end of the QDA221501 catalog number indicate?

The 1 indicates that this 2-pole breaker is configured for an A and B phase connection on the I-Line bus.

What is the difference between Square D QDA, QGA, and QJA circuit breakers?

The difference lies in their interrupting ratings. The QDA series is rated for 25kA at 240VAC, while the QGA is rated for 65kA, and the QJA is rated for 100kA at the same voltage. They share the same physical Q-Frame footprint and I-Line mounting.

Is the QDA221501 a direct replacement for older Square D breakers?

Yes, the PowerPacT Q-Frame QDA221501 is the direct replacement for the discontinued Square D Q221501 circuit breaker.

Can the QDA221501 be reverse fed?

Yes, Square D Q-Frame thermal-magnetic circuit breakers are suitable for forward or reverse feeding. When backfeeding an I-Line panelboard, ensure the breaker is properly labeled as a main breaker in accordance with local electrical codes.

Are the trip settings on the QDA221501 adjustable?

No, this breaker features a fixed thermal-magnetic trip unit. Both the long-time (thermal) and instantaneous (magnetic) trip functions are factory-set and non-interchangeable.

What wire sizes and materials are accepted by the standard lugs on the QDA221501?

The standard mechanical lugs on the load side of this breaker accept aluminum or copper (Al/Cu) wire ranging from 4 AWG to 300 kcmil.

SuperClub

Join free. Get 500 SuperPoints.

Earn points on eligible purchases and redeem them at checkout.

100 SuperPoints = $1 off.

Warranties

60-Day Warranty

Your purchase includes 60 days of SuperBreakers warranty coverage.

Get a Quote

Don’t see what you’re looking for?

We source obsolete and hard-to-find parts every day.

Shipping

Free Shipping Policy

Parcel shipments with item value over $99 qualify for free economy shipping within the continental US. Please call to confirm special handling instructions. We do not charge a handling fee or require a minimum amount on any order. SuperBreakers does not ship on customer accounts.

Read our full shipping policy

Same Day Shipping

We strive to ship out your items the same day the order is placed. In rare circumstances SuperBreakers may reserve up to 5 business days to consolidate orders for complete shipment.

Expedited Shipments

Orders being shipped via Next Day Air, 2 Day Shipping or 3 Day Shipping must be received by 3 PM EST to guarantee same-day shipments. Expedited orders only ship on normal business days. Shipments will NOT be sent out on Saturdays and Sundays.

International Shipping

All International orders require a $1,000 minimum order threshold. Due to the special nature of these shipments, we require that these be placed with a SuperBreakers representative. Additional shipping and instructions will apply. All International Orders are Non-Cancel and Non-Refundable.

Reviews

5.0
Rated 5.0 out of 5 stars
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
Rating
Ratings
6 reviews
  • CB
    Carl B.
    Verified Buyer
    Reviewing
    Square D QDA32125 - 125A 3 Pole Molded Case Circuit Breaker
    I recommend this product
    Rated 5 out of 5 stars
    6/11/26
    Sq. D I-line

    Price was fair for these New Breakers. More importantly, is the avaiability and not having to deal with long lead times

  • CS
    Claus S.
    Verified Buyer
    Reviewing
    Square D QDA32100 - 100A 3 Pole Molded Case Circuit Breaker
    I recommend this product
    Rated 5 out of 5 stars
    3/3/26
    100A 3 phase Breaker

    Priced right and shipping was really Quick. I will use them again!!

  • CG
    Chase G.
    Flag of United States
    Reviewing
    Square D QDA32150 - 150A 3 Pole Molded Case Circuit Breaker
    I recommend this product
    Rated 5 out of 5 stars
    3/16/22
    Always have what I need

    5 stars Super Breaker always has what I need, and at a good price.

  • CG
    Christopher G.
    Flag of United States
    Reviewing
    Square D QDA32100 - 100A 3 Pole Molded Case Circuit Breaker
    I recommend this product
    Rated 5 out of 5 stars
    8/11/21
    speedy service. great quality

    speedy service. great quality

  • RS
    Randy S.
    Flag of United States
    Reviewing
    Square D QDA32225 - 225A 3 Pole Molded Case Circuit Breaker
    I recommend this product
    Rated 5 out of 5 stars
    9/11/19
    Super

    Quick Shipping and great price