ABB XT5NU330ABFF0GHXXX Molded Case Circuit Breaker
- 300A
- 3 Pole
- Unit Mount
Quantity
ABB XT5NU330ABFF0GHXXX - 300A 3 Pole Molded Case Circuit Breaker
New
Quantity
Description
Engineered for commercial and industrial power distribution, the XT5NU330ABFF0GHXXX is a 3-pole, 300A molded case circuit breaker. It utilizes ABB's proven SACE Tmax XT5N frame architecture to deliver consistent performance in demanding environments. This unit-mount breaker is designed to fit seamlessly into ReliaGear neXT panelboards and switchboards. It also functions as a reliable replacement for older T5N400BW models, featuring an adjustable thermal-magnetic trip mechanism for LI protection.Specifications
| Brand | ABB |
|---|---|
| Series | XT5 |
| Amperage | 300A |
| Poles | 3 |
| Mounting Style | Unit Mount |
| Voltage | 240VAC, 480VAC, 600Y/347VAC, 600VDC |
| Phase | 3 |
| AIC Rating | 65kA @ 240VAC, 35kA @ 480VAC, 18kA @ 600Y/347VAC, 16kA @ 600VDC |
| Amperage Range | 210-300A |
|---|
| Frame Type | XT5 |
|---|---|
| Terminal Type | Lugs |
| For Use With | ReliaGear neXT Panelboards, Switchboards |
| Trip Technology | Thermal Magnetic |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Adjustable Thermal, Adjustable Magnetic |
| Available Options | Shunt Trip, Auxiliary Switch, Undervoltage Release, Motor Operator |
|---|---|
| Accessories | Lugs Not Included, Front Terminals Included |
| Standards | CSA C22.2 No. 5, IEC 60947-2, UL 489 |
| Approval | CCC, CSA, cULus, IEC, UL |
| Temp Rating | -25C to 70C |
| Construction Features | HACR Rated, Reverse Feed |
Product FAQs
7 answersWhat legacy ABB circuit breaker does the XT5NU330ABFF0GHXXX replace?
This XT5 breaker serves as a direct, modernized replacement for the discontinued ABB T5N400BW molded case circuit breakers.
What is the adjustment range for the thermal trip unit on this 300A XT5 breaker?
The thermal protection (Long-Time) is adjustable from 70% to 100% of the rated current, allowing you to set the continuous trip point between 210A and 300A.
Which panelboards are compatible with the XT5NU330ABFF0GHXXX circuit breaker?
This unit mount breaker is designed for seamless integration into ABB ReliaGear neXT panelboards and switchboards.
What is the maximum amperage capacity of the XT5 frame used by this breaker?
While this specific circuit breaker is rated for 300A, the ABB XT5 frame architecture supports continuous current ratings up to 600A, providing a robust footprint for commercial and industrial applications.
Can this 3-pole XT5 breaker be used in single-phase applications?
Yes, ABB XT5 three-pole circuit breakers equipped with thermal-magnetic trip units are UL marked as suitable for single-phase applications up to 600VAC.
Can the XT5NU330ABFF0GHXXX be reverse fed?
Yes, this breaker can be reverse fed. However, if power is supplied from the bottom terminals at voltages above 500V, an additional backplate accessory is required per ABB specifications.
What does the LI trip function code indicate on this breaker?
The LI designation means the thermal-magnetic trip unit provides adjustable Long-Time (overload) and adjustable Instantaneous (short-circuit) protection.
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