ABB / General Electric THJK636600 Molded Case Circuit Breaker
- 600A
- 3 Pole
- Unit Mount
Quantity
ABB / General Electric THJK636600 - 600A 3 Pole Molded Case Circuit Breaker
Re-Certified
Quantity
Description
Built for industrial power distribution, the GE THJK636600 provides 600 amps of thermal-magnetic protection in a 3-pole configuration. It features adjustable magnetic trip settings to fine-tune instantaneous response for specific load requirements. Designed as a unit mount MCCB, it fits perfectly into GE J600 series switchboards and enclosures. The breaker offers high interrupting capacity, rated up to 65kA at 240VAC and 35kA at 480VAC, ensuring robust defense against severe faults.Specifications
| Brand | ABB / General Electric |
|---|---|
| Series | THJK |
| Amperage | 600A |
| 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 | THJK |
|---|---|
| Terminal Type | Lugs |
| For Use With | GE J600 Enclosures, Switchboards, Motor Control Centers |
| Wire Gauge | (2) 4/0 AWG - 500 kcmil (Cu/Al) |
| Max Wire | 500 kcmil |
| Min Wire | 4/0 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, Lug Kits |
|---|---|
| Accessories | Load Side Lugs Included |
| 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 |
Product FAQs
6 answersWhat is the difference between the GE TJK and THJK circuit breakers?
Both are J-frame molded case circuit breakers, but they differ in their interrupting capacity. The THJK series, including the THJK636600, is a high-interrupting breaker rated at 35kAIC at 480VAC, whereas the standard TJK series has a lower interrupting rating.
Can the THJK636600 be reverse fed?
Yes. Because this thermal-magnetic breaker does not have factory-marked line and load terminals, it is suitable for reverse feed applications. Always verify local codes and use appropriate retaining hardware if back-feeding in a panel.
What enclosures and panels are compatible with this breaker?
The THJK636600 is designed for use in GE J600 enclosures, as well as compatible GE switchboards and motor control centers.
What wire sizes are accepted by the lugs on this 600A breaker?
The standard lugs accept two cables per phase, accommodating wire sizes from 4/0 AWG up to 500 kcmil. The terminals are rated for both copper (Cu) and aluminum (Al) conductors.
What does the LI trip function mean on the THJK636600?
The LI designation indicates that the thermal-magnetic trip unit provides Long-Time (L) and Instantaneous (I) protection. The thermal element is fixed for overload protection, while the magnetic instantaneous trip is adjustable to coordinate with motor inrush currents or downstream devices.
Is the THJK636600 considered an ABB or General Electric product?
It is a legacy General Electric product. Following ABB's acquisition of GE Industrial Solutions, these J-frame breakers are now manufactured and supported under the ABB / General Electric brand umbrella.
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