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Siemens QJ22B070 Molded Case Circuit Breaker

  • 70A
  • 2 Pole
  • Bolt-On
Siemens QJ22B070
Molded Case Circuit Breaker
Brand Siemens
SKU QJ22B070
Select Item Condition
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  • 70A
  • 2 Pole
  • Bolt-On

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Siemens QJ22B070 2 Pole Circuit Breaker

Siemens QJ22B070 - 70A 2 Pole Molded Case Circuit Breaker

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$601.89 In Stock

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Description

Designed to handle 70-amp commercial loads, this two-pole thermal-magnetic breaker delivers standard 10kAIC fault protection. It integrates smoothly into Siemens P1, P2, and P3 panelboards, as well as compatible meter centers and switchboards. The QJ frame construction ensures reliable long-time and instantaneous trip functions for facility power distribution. Additional characteristics include reverse feed compatibility, a non-interchangeable trip unit, and an HACR rating for motor loads.

Specifications

Key specifications
Brand Siemens
Part Number QJ22B070
Series QJ
Amperage 70A
Poles 2
Mounting Style Bolt-On
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, Meter Centers, 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 Thermal, Fixed Magnetic
Standards and features
Available Options Shunt Trip, Auxiliary Switch, Alarm Switch
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

Product FAQs

8 answers
Which Siemens panelboards are compatible with the QJ22B070 circuit breaker?

This breaker is designed to install seamlessly into Siemens P1, P2, and P3 panelboards. It is also compatible with Siemens meter centers and individual enclosures.

What wire sizes are accepted by the standard lugs on the QJ22B070?

The included load-side lugs accept 6 AWG to 300 kcmil copper (Cu) wire, or 4 AWG to 300 kcmil aluminum (Al) wire.

How is the QJ22B070 mounted into a panelboard?

This is a bolt-on circuit breaker. It secures directly to the panelboard bus using bolted connections, ensuring a secure and reliable electrical contact.

What type of trip unit does the QJ22B070 utilize?

It features a fixed thermal-magnetic trip unit. This provides long-time (thermal) protection against overloads and instantaneous (magnetic) protection against short circuits.

Are the trip settings on the QJ22B070 adjustable?

No, this breaker features a non-interchangeable trip unit with fixed thermal and fixed magnetic settings. It does not support field adjustments for the trip curve.

Can the Siemens QJ22B070 be reverse fed?

Yes, this QJ frame breaker supports reverse feed applications, allowing it to be used as a main breaker or back-fed branch breaker where permitted by local electrical codes.

Is the QJ22B070 suitable for HVAC applications?

Yes, this breaker is HACR rated, meaning it is certified for use with heating, air conditioning, and refrigeration equipment motor loads.

What safety certifications does the QJ22B070 hold?

The QJ22B070 is UL 489 listed and CSA certified, ensuring it meets strict safety and performance standards for molded case circuit breakers.

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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.