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ABB / General Electric TJK436300WL Molded Case Circuit Breaker

  • 300A
  • 3 Pole
  • Unit Mount
ABB / General Electric TJK436300WL
Molded Case Circuit Breaker
Brand ABB / General Electric
SKU TJK436300WL
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  • 300A
  • 3 Pole
  • Unit Mount

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General Electric TJK436300WL 3 Pole Circuit Breaker

ABB / General Electric TJK436300WL - 300A 3 Pole Molded Case Circuit Breaker

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$4,263.46 In Stock

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Description

Operating as a standalone overcurrent device, this 300-amp unit-mount breaker is ideal for J-Frame enclosures and custom control panels. The "WL" catalog designation indicates that line and load lugs are included from the factory, saving procurement time. It features an interchangeable trip unit with fixed thermal and adjustable magnetic functions. While this legacy model is ultimately replaced by the Tmax XT5 series, it remains essential for maintaining existing GE switchgear.

Specifications

Key specifications
Brand ABB / General Electric
Part Number TJK436300WL
Series TJK
Amperage 300A
Poles 3
Mounting Style Unit Mount
Voltage 240VAC, 480VAC, 600VAC, 250VDC, 500VDC
Phase 3
AIC Rating 42kA @ 240VAC, 30kA @ 480VAC, 22kA @ 600VAC, 20kA @ 250VDC, 20kA @ 500VDC
Fit and installation
Terminal Type Lugs
For Use With GE J600 Panelboards, Switchboards, Motor Control Centers, J-Frame Enclosures
Wire Gauge (1) 6 AWG-600 kcmil (Cu/Al) or (2) 2/0 AWG-250 kcmil (Cu/Al)
Max Wire 600 kcmil
Min Wire 6 AWG
Protection and operation
Trip Technology Thermal Magnetic
Trip Function Code LI
Trip Function Long-Time, Instantaneous
Trip Adjustability Fixed Thermal, Adjustable Magnetic
Standards and features
Available Options Shunt Trip, Auxiliary Switch, Undervoltage Release, Alarm Switch, Padlock Attachment
Accessories Line and Load Lugs (TCAL43)
Standards CSA C22.2 No. 5.1, NEMA AB 1, UL 489
Approval CSA, UL
Temp Rating 40C
Construction Features Interchangeable Trip Unit, Adjustable Instantaneous Trip, Reverse Feed

Product FAQs

8 answers
What wire configurations do the factory lugs support?

The included line and load lugs accept either a single 6 AWG to 600 kcmil conductor or dual 2/0 AWG to 250 kcmil conductors per phase. They are rated for both copper and aluminum wiring.

Which panelboards are compatible with the TJK436300WL?

This breaker is designed for installation in GE J600 panelboards, switchboards, motor control centers, and dedicated J-frame enclosures.

How does the adjustable magnetic trip function work on this model?

The thermal magnetic trip unit includes a fixed thermal element for overload protection and an adjustable magnetic element. The magnetic dial allows electricians to set the instantaneous short circuit trip threshold to coordinate with specific load inrush currents.

What does the WL suffix in the catalog number indicate?

The WL suffix designates that the breaker is supplied from the factory with both line and load lugs installed.

Why is this breaker listed under both ABB and General Electric?

ABB acquired GE Industrial Solutions. While newer production runs may feature ABB branding, the TJK436300WL maintains the exact same physical dimensions, mounting footprint, and electrical specifications as the legacy GE models.

How is this J-frame breaker mounted?

It is a unit mount device. It must be bolted directly to the enclosure backpan or mounting plate, with electrical connections made via the provided cable lugs.

Is this breaker suitable for direct current systems?

Yes, it carries a DC rating of 20 kA at both 250 Vdc and 500 Vdc, allowing integration into industrial DC control panels and compatible battery or solar systems.

What does the J600 designation mean?

J600 refers to the GE J-frame family with a maximum frame capacity of 600 amps. This specific breaker utilizes that 600A physical frame but is factory calibrated with a 300A continuous current rating.

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Reviews

4.7
Rated 4.7 out of 5 stars
Based on 3 reviews
Total 5 star reviews: 2 Total 4 star reviews: 1 Total 3 star reviews: 0 Total 2 star reviews: 0 Total 1 star reviews: 0
Rating
Ratings
3 reviews
  • BR
    Brian R.
    Flag of United States
    Reviewing
    General Electric TJK636F000 Circuit Breaker Frame
    I recommend this product
    Rated 5 out of 5 stars
    11/23/20
    600 AMp breaker

    Excellent Price, Excellent Service, speedy delivery!

  • JT
    James T.
    Flag of United States
    Reviewing
    General Electric TJK636F000 Circuit Breaker Frame
    I recommend this product
    Rated 5 out of 5 stars
    8/16/20
    Replacement breaker needed!

    As usual ....the folks at Superbreakers delivered on their promise.

  • JM
    John M.
    Flag of United States
    Reviewing
    ABB / General Electric TJK636300WL - 300A 3 Pole Molded Case Circuit Breaker
    I recommend this product
    Rated 4 out of 5 stars
    10/4/17
    Dolphins Car Wash

    Website was easy to use