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Siemens QJ22B150 Molded Case Circuit Breaker

  • 150A
  • 2 Pole
  • Unit Mount
Siemens QJ22B150
Molded Case Circuit Breaker
Brand Siemens
SKU QJ22B150
Select Item Condition
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  • 150A
  • 2 Pole
  • Unit Mount

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Siemens QJ22B150 2 Pole Circuit Breaker

Siemens QJ22B150 - 150A 2 Pole Molded Case Circuit Breaker

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$429.95 In Stock

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Description

Built for heavy-duty distribution, the Siemens QJ22B150 is a 2-pole, 150A molded case circuit breaker. It operates at 240VAC and utilizes a trip-free mechanism with fixed thermal and magnetic elements to ensure consistent performance in demanding environments. The breaker mounts into Siemens P1, P2, and P3 panelboards, along with compatible switchboards and meter centers. For legacy system maintenance, it is a direct fit, while the QR22B150 serves as the modern replacement.

Specifications

Key specifications
Brand Siemens
Part Number QJ22B150-R
Series QJ
Amperage 150A
Poles 2
Mounting Style Unit Mount
Voltage 240VAC
Phase 1
AIC Rating 10kA @ 240VAC
Fit and installation
Frame Type QJ
Terminal Type Lugs
For Use With Siemens P1, P2, P3 Panelboards, Switchboards, Meter Centers
Wire Gauge 6 AWG - 300 kcmil (Cu), 4 AWG - 300 kcmil (Al)
Max Wire 300 kcmil
Min Wire 6 AWG (Cu), 4 AWG (Al)
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, Undervoltage Release
Accessories Load Side Lugs
Standards CSA C22.2 No. 5, UL 489
Approval CSA, UL
Temp Rating 40C
Construction Features HACR Rated, Reverse Feed, Non-Interchangeable Trip, Trip-Free Mechanism

Product FAQs

6 answers
Which panelboards are compatible with the Siemens QJ22B150 circuit breaker?

The QJ22B150 is a bolt-on unit mount breaker designed for use in Siemens P1, P2, and P3 panelboards, as well as compatible Siemens switchboards and modular meter centers.

Is the Siemens QJ22B150 suitable for HVAC equipment?

Yes, this breaker is HACR rated, making it suitable for use with compatible heating, air conditioning, and refrigeration equipment where permitted by local electrical codes.

Can the QJ22B150 be reverse fed?

Yes, this QJ frame breaker is reverse feed capable, allowing it to be used in applications where power is fed from the load side.

Are there versions of the QJ22B150 with a higher interrupting rating?

Yes, if your application requires a higher short-circuit rating than the standard 10kAIC, you can use the QJH22B150 which is rated at 22kAIC, or the QJ22B150H which is rated at 42kAIC at 240VAC.

What is the ambient operating temperature rating for the QJ22B150?

This thermal-magnetic circuit breaker is calibrated for a maximum ambient operating temperature of 40 degrees Celsius (104 degrees Fahrenheit).

What is the modern replacement for the QJ22B150?

The QJ frame is a legacy series. For modern replacements, it crosses over to the Siemens QR frame, such as the QR22B150L. Note that installing a QR breaker in an older QJ space may require a specific mounting kit.

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Reviews

4.8
Rated 4.8 out of 5 stars
Based on 10 reviews
Rating
Ratings
10 reviews
  • WM
    William M.
    Verified Buyer
    Reviewing
    Siemens QJ23B125 - 125A 3 Pole Molded Case Circuit Breaker
    I recommend this product
    Rated 5 out of 5 stars
    9/11/26
    Breaker

    Perfect

  • TN
    Timothy N.
    Verified Buyer
    Reviewing
    Siemens QJ23B200 - 200A 3 Pole Molded Case Circuit Breaker
    I recommend this product
    Rated 5 out of 5 stars
    7/27/26
    10% off

    Arrived on time, worked when turned on

  • WK
    Willie K.
    Verified Buyer
    Reviewing
    Siemens QJ23B150 - 150A 3 Pole Molded Case Circuit Breaker
    I recommend this product
    Rated 4 out of 5 stars
    7/22/26
    Breaker

    The Breaker arrive fast and in good condition however when I looked at the specs it was not the correct one.

  • PG
    Phil G.
    Verified Buyer
    Reviewing
    Siemens QJ23B200 - 200A 3 Pole Molded Case Circuit Breaker
    I recommend this product
    Rated 5 out of 5 stars
    3/3/26
    Great Service

    I was in a bind for this breaker that was for an elevator, and Nick got me all the components even though their blizzard! Will use them for all my specialty breakers.

  • VC
    Vladimir C.
    Verified Buyer
    Reviewing
    Siemens QJ22B200 - 200A 2 Pole Molded Case Circuit Breaker
    I recommend this product
    Rated 4 out of 5 stars
    12/10/25
    4 start

    The breaker was it perfect match.,but it was missing the two top bolts.