ABB XT4LU3250BY8000XXX Molded Case Circuit Breaker
- 250A
- 3 Pole
- Unit Mount
Quantity
ABB XT4LU3250BY8000XXX - 250A 3 Pole Molded Case Circuit Breaker
New
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Description
Designed for heavy-duty applications, the ABB XT4LU3250BY8000XXX is a 3-pole, 250A molded case circuit breaker within the SACE Tmax XT family. It mounts into ABB ReliaGear neXT power panels and SB switchboards, serving as a substitute for the legacy T4L250TW. Front terminals are included, though lugs must be sourced separately. With a 100kAIC capacity at 480VAC, it handles high fault currents safely.Specifications
| Brand | ABB |
|---|---|
| Series | XT4 |
| Amperage | 250A |
| Poles | 3 |
| Mounting Style | Unit Mount |
| Voltage | 240VAC, 480VAC, 600VAC, 250VDC, 600VDC |
| Phase | 3 |
| AIC Rating | 200kA @ 240VAC, 100kA @ 480VAC, 50kA @ 600VAC, 85kA @ 250VDC, 75kA @ 600VDC |
| Amperage Range | 175-250A |
|---|
| Terminal Type | Lugs |
|---|---|
| For Use With | ABB ReliaGear neXT Power Panels, ReliaGear SB Switchboards, SACE Tmax XT Panelboards |
| Wire Gauge | 3/0 AWG - 350 kcmil (Cu/Al) |
| Max Wire | 350 kcmil |
| Min Wire | 3/0 AWG |
| 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, Rotary Handle, Padlock Attachment |
|---|---|
| Accessories | Front Terminals Included, Lugs Not Included |
| Standards | CSA C22.2 No. 5, IEC 60947-2, UL 489 |
| Approval | CCC, CSA, IEC, UL |
| Temp Rating | -25C to 70C |
| Construction Features | HACR Rated, Current Limiting, Reverse Feed |
Product FAQs
6 answersWhat does the L in the XT4LU3250BY8000XXX part number signify?
The L designates the interrupting capacity tier within the ABB SACE Tmax XT4 family. For this specific breaker, it indicates a high interrupting rating of 100kA at 480VAC and 200kA at 240VAC.
How does the adjustable thermal magnetic trip unit function on this 250A breaker?
The LI (Long-Time and Instantaneous) trip unit allows you to adjust both the thermal overload protection and the instantaneous short-circuit protection. This adjustability provides precise coordination with other protective devices and specific load profiles in your electrical system.
What type of conductors can be used with the factory lugs on this XT4 breaker?
The factory lugs are rated for both copper and aluminum conductors ranging from 3/0 AWG to 350 kcmil. When terminating, wire sizing should be based on the ampacity of 75 degrees Celsius rated wire to match the lug specifications.
Is this breaker compatible with ABB ReliaGear neXT power panels?
Yes, this breaker can be installed in ABB ReliaGear neXT Power Panels, ReliaGear SB Switchboards, and SACE Tmax XT Panelboards. Note that this specific SKU is a unit mount configuration, so verify if your panel requires a plug-in version or specific mounting hardware.
Can this breaker be used to replace legacy ABB Tmax T4 breakers?
Yes, the SACE Tmax XT4 series serves as the direct upgrade and replacement for legacy ABB Tmax T4 breakers, such as the T4L250TW. Verify your specific mounting hardware and terminal configuration before retrofitting.
Can power be supplied from the bottom terminals of this XT4 breaker?
Yes, power can be supplied from the bottom terminals of the XT4 breaker up to a maximum of 600V. This makes it suitable for reverse-feed applications in standard commercial and industrial panels.
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