ABB TJK J600 3-Pole Interchang...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$2,195.44
ABB TJK J600 3-Pole Interchangeable Trip Unit

ABB TJK J600 3-Pole Interchangeable Trip Unit

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Model: TJK436T300

In Stock (leaves warehouse same day if ordered before 3pm ET)

$2,195.44
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ABB TJK J600 3-Pole Trip Unit

The ABB TJK 3-Pole Trip Unit is engineered for the J600 circuit breaker frame, delivering dependable thermal magnetic overcurrent protection for commercial and industrial electrical distribution systems. This interchangeable trip unit is available in amperage trip ratings from 225A to 300A, giving electrical professionals the flexibility to match protection levels to specific panelboard and switchgear requirements. It is backed by a broad interrupt rating range spanning 20kA@125 Vdc, 20kA@250 Vdc, 20kA@500 Vdc, 22kA@600 Vac, 30kA@277 Vac, 30kA@480 Vac, 42kA@120 Vac, 42kA@120/240 Vac, and 42kA@240 Vac, giving confidence in demanding three-phase power distribution applications. Built and tested to UL Standard E11592, this ABB trip unit is a reliable choice for new installations, circuit breaker servicing, and panelboard or switchgear upgrades where J600 frame compatibility is required.

Key Features

  • Amperage Options: Available in trip ratings of 225A and 300A to suit varying load and protection requirements within the J600 frame.
  • 3-Pole Configuration: Designed for three-phase circuit protection in commercial and industrial electrical systems.
  • J600 Frame: Sized for the J600 circuit breaker frame family, ensuring correct fit and function with corresponding ABB breakers.
  • Thermal Magnetic Application: Combines thermal and magnetic trip elements to deliver dependable overload and short-circuit protection.
  • Interchangeable Trip Design: Field-selectable current ratings allow greater application flexibility and reduced inventory needs across the 225A-300A range.
  • Broad Interrupt Ratings: Rated 20kA@125 Vdc, 20kA@250 Vdc, 20kA@500 Vdc, 22kA@600 Vac, 30kA@277 Vac, 30kA@480 Vac, 42kA@120 Vac, 42kA@120/240 Vac, and 42kA@240 Vac for versatile system compatibility across voltage classes.
  • Sub Brand: Part of the ABB J600 thermal magnetic trip unit product line.
  • Packaging: Supplied 1 EA per unit for straightforward stocking and replacement.

Certifications & Compliance

  • UL Standard E11592

Technical Specifications

  • Number Of Poles: 3
  • Standards: UL E11592
  • Amperage Options: 225A, 300A

Typical Applications

  • Commercial and Industrial Panelboards
  • Switchgear and Motor Control Center Protection
  • Three-Phase Power Distribution Systems
  • Circuit Breaker Retrofits and Trip Unit Replacements
  • Electrical Service Modernization Projects

Why ABB?

ABB trip units are engineered for dependable, code-compliant performance in demanding electrical distribution environments. With a broad interrupt rating range spanning multiple AC and DC voltage classes, an interchangeable trip design available across 225A and 300A ratings, and testing to UL Standard E11592, the ABB TJK 3-Pole Trip Unit gives electrical professionals a trusted component for J600 frame circuit breaker applications, whether for new construction, panelboard upgrades, or replacement service work.

Product Specs

Product Type:
Trip Unit
Number Of Poles:
3
Amperage Rating:
225A - 300A
Series:
J600
Standards:
UL E11592
Department:
Electrical
Product Group:
Circuit Protection
Configuration:
Interchangeable Trip Unit
Product Subgroup:
Circuit Breakers

ABB TJK436T300 – Frequently Asked Questions

1) The breaker frame is 400 amp but I need to protect a smaller feeder. Can I set the TJK lower?
That is exactly what the interchangeable trip design is for. The frame stays 400A while the trip unit sets the actual current rating, and the TJK is ordered in a specific ampere value. Two are offered: 225 amperes (TJK436F000) and 300 amperes (TJK436T300). Pick the one that matches the conductor and load you are protecting, not the frame size.
2) What is the interrupting rating of the ABB TJK J600 trip unit at 480 volts?
30kA at 480 Vac. The full range runs 42kA at 120 Vac, 42kA at 120/240 Vac, 42kA at 240 Vac, 30kA at 277 Vac, 30kA at 480 Vac, and 22kA at 600 Vac. On DC it is 20kA at 125, 250, and 500 Vdc. Match the rating at your system voltage against the available fault current at the panel before you commit.
3) Can an Eaton MARK 75 trip unit be used in place of an ABB TJK trip unit?
No. The ABB TJK is built specifically for the J600 (400A) ABB breaker frame and mounts only in that frame family, so the trip elements and frame interface are matched to ABB breakers. The Eaton MARK 75 trip unit is a different manufacturer's line for Eaton molded case circuit breakers and belongs in Eaton frames. Trip units are not cross-brand interchangeable parts - if the breaker in the panel is an ABB J600 frame, the TJK is the correct family; if it is an Eaton molded case breaker, the MARK 75 is the one to look at.
4) Is the ABB TJK trip unit a three-phase part?
Yes, it is a 3-pole unit, so it covers all three phases of a three-phase circuit in one assembly. It is used in three-phase panelboards, switchgear, and motor control centers. There is no single-pole or two-pole version of the TJK offered here.
5) Does the ABB TJK use electronic or thermal magnetic trip?
Thermal magnetic. A bimetal element handles sustained overloads and a magnetic element handles short circuits, with no electronics and no control power required. If your spec calls for an electronic trip unit with adjustable long-time, short-time, and instantaneous bands, this is not that part.
6) Will a UL-listed TJK trip unit satisfy an inspector on a panelboard retrofit?
The TJK is built and tested to UL Standard E11592, which is the listing reference an inspector or spec reviewer looks for on a trip unit going into commercial or industrial distribution gear. It is sold for new installations, breaker servicing, and panelboard or switchgear upgrades on the J600/400A frame.
7) What do I order, and how many come in a pack?
Order by the ampere value you need: TJK436F000 for 225 amperes or TJK436T300 for 300 amperes. Each is supplied 1 each, so one order line equals one trip unit. Stock the ampere rating that matches your feeder rather than trying to buy a single catch-all part.
How fast can I get the ABB TJK436T300 delivered?
Most orders ship the same day from our distribution partners, with quick delivery throughout the continental U.S. Need it urgently? Contact Us for expedited shipping options.
Can I return it if it doesn’t work for me?
Yes—ZenSupply offers a hassle-free return policy. If the product isn’t the right fit, reach out to our support team for a return authorization or setup a return by following our return instructions.
Does the ABB TJK436T300 come with a warranty?
Absolutely. The ABB TJK436T300 is backed by a manufacturer’s warranty. For full warranty terms, check the product documentation or Contact Us.
How do I get technical support or installation help for the ABB TJK436T300?
You can call, text, or email our expert support team for fast answers. We’re here to help with product selection, installation tips, and troubleshooting. Contact Us
Why buy the ABB TJK436T300 from ZenSupply?
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