ABB XT5LU340ABFN000XXX Molded Case Circuit Breaker
- 400A
- 3 Pole
- Unit Mount
Quantity
ABB XT5LU340ABFN000XXX - 400A 3 Pole Molded Case Circuit Breaker
New
Quantity
Description
Belonging to the SACE Tmax XT family, this 400-amp unit mount breaker delivers robust current-limiting protection for commercial and industrial facilities. The XT5 frame provides high-performance short-circuit interruption rated at 100kAIC at 480VAC. It integrates seamlessly into ABB ReliaGear neXT panelboards, switchboards, and motor control centers. Facility managers can also utilize this unit to replace older T5L400BW breakers. Standard lugs accept up to 500 kcmil wire for easy wiring.Specifications
| Brand | ABB |
|---|---|
| Series | XT5 |
| Amperage | 400A |
| Poles | 3 |
| Mounting Style | Unit Mount |
| Voltage | 600VAC, 600VDC |
| Phase | 3 |
| AIC Rating | 200kA @ 240VAC, 100kA @ 480VAC, 65kA @ 600VAC, 100kA @ 250VDC, 70kA @ 500VDC, 50kA @ 600VDC |
| Amperage Range | 280-400A |
|---|
| Terminal Type | Lugs |
|---|---|
| For Use With | ReliaGear neXT Panelboards, Switchboards, Motor Control Centers |
| Wire Gauge | 2x 2/0 AWG - 500 kcmil |
| Max Wire | 500 kcmil |
| Min Wire | 2/0 AWG |
| Trip Technology | Thermal Magnetic |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Adjustable Thermal, Adjustable Magnetic |
| Available Options | Auxiliary Switch, Shunt Trip, Undervoltage Release, Motor Operator, Handle Lock |
|---|---|
| Accessories | None (Standard Configuration) |
| Standards | CSA C22.2 No. 5, IEC 60947-2, UL 489 |
| Approval | CCC, CSA, cULus, HACR, IEC, UL |
| Temp Rating | -25C to 70C |
| Construction Features | HACR Rated, Current Limiting, Reverse Feed |
Product FAQs
5 answersWhat are the wire size requirements for the lugs on the XT5LU340ABFN000XXX?
The factory-installed lugs accept two conductors per phase, accommodating wire sizes from 2/0 AWG up to 500 kcmil. This dual-wire capability is ideal for running parallel conductors to safely meet the 400A ampacity requirement.
Which panelboards are compatible with the XT5LU340ABFN000XXX circuit breaker?
This unit mount breaker is designed for use in ABB and GE ReliaGear neXT panelboards, as well as compatible switchboards and motor control centers. It bolts directly into the equipment chassis for a secure connection.
How do the adjustable trip settings work on this XT5 breaker?
This breaker features a thermal-magnetic trip unit with adjustable Long-Time (L) and Instantaneous (I) functions. The adjustable thermal setting allows you to fine-tune the overload protection to match your specific load, while the adjustable magnetic setting lets you set the short-circuit pickup level to prevent nuisance tripping during motor inrush.
What does the L in the XT5LU340ABFN000XXX catalog number signify?
In the ABB SACE Tmax XT nomenclature, the L designates the interrupting capacity tier. For the XT5 frame, this indicates a high interrupting rating of 100kA at 480VAC and 65kA at 600VAC, making it suitable for commercial and industrial systems with substantial available fault currents.
Is the XT5LU340ABFN000XXX rated for direct current (DC) systems?
Yes, this breaker is fully rated for DC applications. It provides an interrupting capacity of 100kA at 250VDC, 70kA at 500VDC, and 50kA at 600VDC, which is essential for battery energy storage systems, solar installations, and industrial DC drives.
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