ABB / General ElectricTJJ436225
ABB / Thomas & Betts TBBJ3225 Molded Case Circuit Breaker
- 225A
- 3 Pole
- Plug-On
ABB / Thomas & Betts
TBBJ3225
Molded Case Circuit Breaker
Brand
ABB / Thomas & Betts
SKU
TBBJ3225
Quantity
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ABB / Thomas & Betts TBBJ3225 - 225A 3 Pole Molded Case Circuit Breaker
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Description
Built for heavy-duty commercial applications, this 225A, 3-pole molded case circuit breaker offers robust thermal-magnetic protection. It features fixed long-time and instantaneous trip functions to safely interrupt overloads and short circuits. The TBBJ3225 utilizes a plug-on mounting style for seamless integration into Thomas & Betts, Bryant, Westinghouse, and Eaton Type BR load centers. It is an exact equivalent to the BJ3225.Specifications
| Brand | ABB / Thomas & Betts |
|---|---|
| Part Number | TBBJ3225 |
| Series | TBBJ |
| Amperage | 225A |
| Poles | 3 |
| Mounting Style | Plug-On |
| Voltage | 240VAC |
| Phase | 3 |
| AIC Rating | 10kA @ 240VAC |
| Terminal Type | Box Lugs |
|---|---|
| For Use With | Thomas & Betts Load Centers, Type BR Load Centers, Bryant Load Centers, Westinghouse Load Centers |
| Wire Gauge | 2 AWG - 300 kcmil (Al/Cu) |
| Max Wire | 300 kcmil |
| Min Wire | 2 AWG |
| Trip Technology | Thermal Magnetic |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Fixed Thermal, Fixed Magnetic |
| Accessories | Load Side Lugs Included |
|---|---|
| Standards | CSA C22.2 No. 5, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | Common Trip, Main Breaker, Quick-Make/Quick-Break, Trip-Free Mechanism, Visual Trip Indicator |
Product FAQs
8 answersWhich load centers accept the TBBJ3225 breaker?
This plug-on breaker is designed for use in Thomas & Betts load centers. It is also compatible with Type BR, Bryant, and Westinghouse load centers that accept 225A 3-pole plug-in breakers.
What type of wire can be used with the box lugs on this breaker?
The terminal lugs accept both aluminum and copper conductors ranging from 2 AWG to 300 kcmil. Ensure proper torque specifications are followed during installation as required by local codes.
Is the TBBJ3225 interchangeable with other breaker brands?
Yes. The TBBJ series is a legacy Thomas & Betts design that is an exact equivalent to the BJ3225. It can be used as a direct replacement in compatible Type BR load centers from Bryant, Westinghouse, and Eaton.
What does the LI trip function indicate on the TBBJ3225?
The LI designation means this thermal-magnetic breaker provides Long-Time and Instantaneous protection. Both the thermal overload and magnetic short-circuit trip points are fixed and cannot be adjusted in the field.
Does this breaker require a bolt-on connection?
No. The TBBJ3225 features a plug-on mounting style, allowing it to snap directly into the busbar of compatible load centers without the need for bolted connections.
Can I install this 225A breaker in any Thomas & Betts panel?
No. While it is designed for Thomas & Betts load centers, the panel must specifically be rated to accept a 225A, 3-pole plug-in breaker. Always verify the maximum amperage and frame compatibility on your panel's label before installation.
What is the interrupting rating for this breaker, and why does it matter?
The TBBJ3225 has a maximum interrupting rating of 10kA at 240V. This indicates the highest fault current the breaker can safely clear without sustaining damage. It must not be installed in systems where the available fault current exceeds 10,000 amps.
Why is this breaker listed under both ABB and Thomas & Betts?
Thomas & Betts is a legacy brand that was acquired by ABB. As a result, TBBJ series breakers are often cataloged under both the ABB and Thomas & Betts names, but the physical product and specifications remain identical.
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