ABB XT4NU3250AY8000XXX Molded Case Circuit Breaker
- 250A
- 3 Pole
- Unit Mount
ABB
XT4NU3250AY8000XXX
Molded Case Circuit Breaker
Brand
ABB
SKU
XT4NU3250AY8000XXX
Quantity
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ABB XT4NU3250AY8000XXX - 250A 3 Pole Molded Case Circuit Breaker
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Description
Providing robust power distribution protection, the XT4NU3250AY8000XXX operates as a 250A, 3-pole molded case circuit breaker from ABB. It features a fixed thermal-magnetic trip unit (TMF) offering long-time and instantaneous (LI) protection functions. This XT4 frame breaker is engineered for compatibility with ReliaGear neXT panelboards, SB switchboards, and SACE Tmax XT enclosures. Rated at 65kAIC at 240VAC, it serves as a modern replacement for the legacy T4N250 (TMA).Specifications
| Brand | ABB |
|---|---|
| Series | XT4 |
| Amperage | 250A |
| Poles | 3 |
| Mounting Style | Unit Mount |
| Voltage | 240VAC, 480VAC, 600Y/347VAC, 250VDC, 600VDC |
| Phase | 3 |
| AIC Rating | 65kA @ 240VAC, 25kA @ 480VAC, 18kA @ 600Y/347VAC, 35kA @ 250VDC, 35kA @ 600VDC |
| Frame Type | XT4N |
|---|---|
| Terminal Type | Lugs |
| For Use With | ReliaGear neXT Panelboards, ReliaGear SB Switchboards, SACE Tmax XT Enclosures |
| Wire Gauge | 3/0 AWG - 350 kcmil |
| Max Wire | 350 kcmil |
| Min Wire | 3/0 AWG |
| Trip Technology | Thermal Magnetic |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Fixed Thermal, Fixed Magnetic |
| Available Options | Shunt Trip, Auxiliary Switch, Undervoltage Release |
|---|---|
| Accessories | Lugs |
| Standards | CSA C22.2 No. 5, IEC 60947-2, UL 489 |
| Approval | CCC, CE, CSA, cULus, IEC, KEMA, UL |
| Temp Rating | -25C to 70C |
| Construction Features | HACR Rated, Reverse Feed |
Product FAQs
6 answersWhich panelboards and switchboards are compatible with the XT4NU3250AY8000XXX?
This breaker is designed for integration with ABB ReliaGear neXT Panelboards, ReliaGear SB Switchboards, and SACE Tmax XT Enclosures.
What does the N in the XT4N frame designation signify?
The N indicates a Normal interrupting capacity tier within the ABB SACE Tmax XT family. For this specific 250A model, it delivers a 25kA fault current rating at 480VAC.
Are the trip settings adjustable on the XT4NU3250AY8000XXX?
No, this specific model utilizes a thermal magnetic trip unit with fixed thermal (Long-Time) and fixed magnetic (Instantaneous) settings. If adjustable settings are required for coordination, a model with an Ekip DIP or Ekip Touch electronic trip unit must be selected.
What wire size range do the factory lugs on this breaker accept?
The included lugs accommodate wire gauges from 3/0 AWG up to 350 kcmil. Always verify proper torque specifications in the ABB instruction manual prior to terminating conductors.
Can this molded case circuit breaker be used in DC circuits?
Yes, it is fully rated for DC applications, providing a short circuit interrupting capacity of 35kA at both 250VDC and 600VDC.
How is this breaker mounted within an enclosure?
It is a unit mount breaker, meaning it is designed to be bolted directly to the backpan or mounting plate of a compatible enclosure rather than plugging into a busbar system.
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