ABB / General Electric THJK436250WL Molded Case Circuit Breaker
- 250A
- 3 Pole
- Unit Mount
Quantity
ABB / General Electric THJK436250WL - 250A 3 Pole Molded Case Circuit Breaker
New
Quantity
Description
Engineered for industrial applications, the THJK436250WL is a 3-pole, 250A unit mount MCCB from GE's legacy J-Frame series. It features thermal-magnetic LI protection with an adjustable instantaneous trip to handle demanding electrical loads. This breaker installs into GE J600 enclosures, A-Series panelboards, and motor control centers. Rated at 65kAIC at 240V, it includes both line and load lugs (TCAL43). For modern facility upgrades, it can be replaced by the ABB Tmax XT4 using a retrofit kit.Specifications
| Brand | ABB / General Electric |
|---|---|
| Part Number | THJK436250WL |
| Series | THJK |
| Amperage | 250A |
| Poles | 3 |
| Mounting Style | Unit Mount |
| Voltage | 240VAC, 480VAC, 600VAC, 250VDC, 500VDC |
| Phase | 3 |
| AIC Rating | 65kA @ 240VAC, 35kA @ 480VAC, 25kA @ 600VAC, 40kA @ 250VDC, 20kA @ 500VDC |
| Frame Type | TJK |
|---|---|
| Terminal Type | Lugs |
| For Use With | GE J600 Enclosures, GE A-Series Panelboards, GE Switchboards, GE Motor Control Centers |
| 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 |
| Trip Technology | Thermal Magnetic |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Fixed Thermal, Adjustable Magnetic |
| Available Options | Shunt Trip, Auxiliary Switch, Undervoltage Release, Alarm Switch, Mounting Hardware |
|---|---|
| Accessories | Line and Load Lugs Included (TCAL43) |
| Standards | CSA C22.2 No. 5, NEMA AB-1, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | High Interrupting Capacity, Interchangeable Trip Unit, HACR Rated, Trip-Free Mechanism, Common Trip |
Product FAQs
7 answersWhat does the "WL" suffix mean in the THJK436250WL catalog number?
The "WL" suffix indicates that the circuit breaker includes factory-installed copper or aluminum (Cu/Al) line and load lugs.
Which enclosures are compatible with the THJK436250WL circuit breaker?
This breaker installs into GE J600 line enclosures, such as the NEMA 12 TJ600J or the NEMA 3R TJ600R. It is also compatible with GE A-Series panelboards, switchboards, and motor control centers.
What wire sizes do the lugs on the THJK436250WL accept?
The included lugs accept either one 6 AWG to 600 kcmil copper or aluminum wire, or two 2/0 AWG to 250 kcmil copper or aluminum wires per phase.
How does the adjustable magnetic trip function on this breaker?
The thermal-magnetic trip unit features a fixed thermal element for overload protection and an adjustable magnetic element for short-circuit protection. The magnetic trip can be adjusted to high, low, or intermediate settings to coordinate with system fault current requirements.
Can the THJK436250WL be used in direct current (DC) applications?
Yes, this breaker is rated for DC systems. It provides an interrupting capacity of 40kAIC at 250VDC and 20kAIC at 500VDC.
Are the trip units on the THJK436250WL interchangeable?
Yes, the THJK frame features interchangeable trip units. If amperage requirements change, you can field-install a different TJK or THJK trip unit without replacing the entire breaker frame.
How is the THJK436250WL mounted?
This is a unit-mount, feed-thru circuit breaker. It bolts directly to the mounting pan or backplate of an enclosure, panelboard, or switchboard rather than plugging onto a busbar.
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