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Siemens QJ22B100L Molded Case Circuit Breaker

  • 100A
  • 2 Pole
  • Unit Mount
Siemens QJ22B100L
Molded Case Circuit Breaker
Brand Siemens
SKU QJ22B100L
Select Item Condition
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  • 100A
  • 2 Pole
  • Unit Mount

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Siemens QJ22B100L 2 Pole Circuit Breaker

Siemens QJ22B100L - 100A 2 Pole Molded Case Circuit Breaker

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$902.86 In Stock

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Description

Built for commercial power distribution, the QJ22B100L is a 100A, two-pole MCCB from the Siemens SENTRON family. This QJ-frame unit provides reliable overcurrent protection for 240VAC systems. Designed for unit mounting, it integrates into Siemens modular meter centers and enclosures. This legacy model is replaced by the newer QR22B100L series. Featuring fixed thermal-magnetic trip technology, it delivers a 10kAIC rating. It includes line and load lugs and is HACR rated.

Specifications

Key specifications
Brand Siemens
Part Number QJ22B100L
Series QJ
Amperage 100A
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 Modular Meter Centers, Panelboards, Enclosures
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 Line and Load 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

Product FAQs

7 answers
What enclosures and equipment are compatible with the QJ22B100L?

This breaker is designed for unit mounting and integrates directly into Siemens modular meter centers, panelboards, and enclosures.

What does the L at the end of the QJ22B100L catalog number mean?

The L indicates that the breaker includes factory-installed line and load lugs for feed-thru wiring.

Is there a direct replacement for the legacy QJ22B100L?

Yes, this QJ frame model is a legacy unit that has been replaced by the newer QR22B100L series.

What wire sizes and materials are accepted by the terminals?

The included lugs accept 6 AWG to 300 kcmil copper wire, or 4 AWG to 300 kcmil aluminum wire.

Is this circuit breaker HACR rated?

Yes, the QJ22B100L is HACR rated, meaning it is approved for use with heating, air conditioning, and refrigeration equipment.

What type of protection does the thermal magnetic trip unit provide?

The fixed thermal magnetic trip unit provides long time protection against sustained overloads and instantaneous protection against short circuits.

How is a feed-thru breaker installed?

A feed-thru breaker like this one uses a unit mount design. Instead of bolting onto a panelboard bus, it mounts independently and uses lugs on both the line and load sides to connect wiring.

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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.