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Siemens QJ22B110H Molded Case Circuit Breaker

  • 110A
  • 2 Pole
  • Bolt-On
Siemens QJ22B110H
Molded Case Circuit Breaker
Brand Siemens
SKU QJ22B110H
Select Item Condition
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  • 110A
  • 2 Pole
  • Bolt-On

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Siemens QJ22B110H 2 Pole Circuit Breaker

Siemens QJ22B110H - 110A 2 Pole Molded Case Circuit Breaker

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$752.38 In Stock

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Description

Engineered for commercial power systems, the Siemens QJ22B110H provides reliable overcurrent protection. This 110A, 2-pole molded case circuit breaker features a rugged QJ frame design for demanding environments. It installs into Siemens panelboards and distribution switchboards using a standard bolt-on connection. The load-side lugs accept copper or aluminum wire for flexible integration.

Specifications

Key specifications
Brand Siemens
Part Number QJ22B110H
Series QJ
Amperage 110A
Poles 2
Mounting Style Bolt-On
Voltage 240VAC
Phase 1
AIC Rating 42kA @ 240VAC
Fit and installation
Frame Type QJ
Terminal Type Lugs
For Use With Siemens Panelboards, Switchboards
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
Standards and features
Available Options Shunt Trip, Auxiliary Switch, Alarm Switch, Undervoltage Release, Padlock Attachment
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, Common Trip, High Interrupting Capacity

Product FAQs

6 answers
Which panelboards are compatible with the Siemens QJ22B110H circuit breaker?

This bolt-on molded case circuit breaker is designed for installation in Siemens P1, P2, and P3 panelboards, as well as compatible Siemens switchboards and enclosures.

Has the Siemens QJ frame series been replaced?

Yes, Siemens has transitioned from the legacy QJ frame to the newer QR frame series. When replacing a QJ22B110H with a modern QR equivalent, a specific mounting kit may be required for installation in older panelboards.

What wire sizes are accepted by the load-side lugs on the QJ22B110H?

The standard lugs accommodate copper conductors from 6 AWG up to 300 kcmil, and aluminum conductors from 4 AWG up to 300 kcmil.

What does the 42kAIC rating indicate for this specific breaker?

The 42kAIC rating means the breaker can safely interrupt up to 42,000 amps of fault current at 240VAC. This high interrupting capacity makes it suitable for commercial and industrial systems with higher available fault currents.

How does the thermal-magnetic trip unit function on this breaker?

The fixed thermal-magnetic trip unit utilizes Long-Time and Instantaneous (LI) functions. The thermal component responds to prolonged overloads, while the magnetic component provides immediate tripping during severe short circuits.

Is it safe to install the QJ22B110H in a non-Siemens panelboard?

No. Siemens circuit breakers are engineered and UL-listed specifically for Siemens equipment. Installing this breaker in a panel from another manufacturer can create improper connections, void the UL listing, and introduce severe fire hazards.

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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.