ABB / General Electric THJK436125 Molded Case Circuit Breaker
- 125A
- 3 Pole
- Unit Mount
Quantity
ABB / General Electric THJK436125 - 125A 3 Pole Molded Case Circuit Breaker
Re-Certified
Quantity
Description
Engineered for industrial environments, the GE THJK436125 provides reliable overcurrent protection. This 3-pole, 125A MCCB is part of the proven J600 line, offering robust performance for demanding distribution systems. As a unit mount breaker, it installs into compatible GE J600 enclosures, switchboards, and motor control centers. Lugs are not included. Rated 35kAIC at 480VAC, it utilizes thermal-magnetic trip technology with fixed thermal and adjustable magnetic settings for LI protection.Specifications
| Brand | ABB / General Electric |
|---|---|
| Part Number | THJK436125 |
| Series | THJK |
| Amperage | 125A |
| 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, Switchboards, 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, Lug Kits |
|---|---|
| Accessories | Lugs Not 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, Common Trip, Trip-Free Mechanism, HACR Rated |
Product FAQs
5 answersWhat types of equipment is the THJK436125 designed to be installed in?
This J-frame breaker is designed for use in GE J600 enclosures, switchboards, and motor control centers. It utilizes a bolt-on connection and is not compatible with standard residential load centers or DIN rails.
What are the acceptable wire sizes for the standard lugs on this breaker?
The standard lugs accept either copper or aluminum conductors. You can use a single wire ranging from 6 AWG to 600 kcmil, or two wires ranging from 2/0 AWG to 250 kcmil per phase.
What does the adjustable magnetic trip feature on the THJK436125 allow you to do?
While the thermal overload protection is fixed at 125 amps, the adjustable magnetic trip allows you to change the instantaneous short-circuit trip threshold. This helps coordinate with other breakers in the electrical system to prevent nuisance tripping.
Why might this breaker arrive with ABB branding instead of General Electric?
ABB acquired GE Industrial Solutions. As a result, newer production runs of the THJK436125 carry the ABB brand name. The physical dimensions, mounting, and electrical characteristics are identical regardless of which logo is on the label.
Can the THJK436125 be used in direct current applications?
Yes, this breaker is rated for DC applications. It provides up to 40kA interrupting capacity at 250VDC and 20kA at 500VDC. Always verify that your specific DC system requirements align with these ratings before installation.
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