ABB XT4NU3150AY8000XXX Molded Case Circuit Breaker
- 150A
- 3 Pole
- Unit Mount
ABB
XT4NU3150AY8000XXX
Molded Case Circuit Breaker
Brand
ABB
SKU
XT4NU3150AY8000XXX
Quantity
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ABB XT4NU3150AY8000XXX - 150A 3 Pole Molded Case Circuit Breaker
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Description
Part of the SACE Tmax XT series, this 150-amp unit mount breaker delivers reliable power distribution for commercial and industrial facilities. It integrates seamlessly into ABB ReliaGear neXT power panels, ReliaGear SB switchboards, and standard XT enclosures. Designed as a functional replacement for legacy T4N150TW models, it simplifies facility maintenance. The device features fixed thermal and magnetic trip settings for standard LI protection, achieving a 65kA interrupt rating at 240VAC.Specifications
| Brand | ABB |
|---|---|
| Series | XT4 |
| Amperage | 150A |
| Poles | 3 |
| Mounting Style | Unit Mount |
| Voltage | 240VAC, 480VAC, 600VAC, 250VDC, 600VDC |
| Phase | 3 |
| AIC Rating | 65kA @ 240VAC, 25kA @ 480VAC, 18kA @ 600VAC, 35kA @ 250VDC, 35kA @ 600VDC |
| 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 | Fixed Thermal, Fixed Magnetic |
| Available Options | Shunt Trip, Auxiliary Switch, Undervoltage Release, Motor Operator, Rotary Handle |
|---|---|
| Accessories | Load Side Lugs Included, Mounting Hardware |
| Standards | CSA C22.2 No. 5, IEC 60947-2, UL 489 |
| Approval | CSA, IEC, UL |
| Temp Rating | -25C to 70C |
| Construction Features | HACR Rated, Reverse Feed |
Product FAQs
8 answersWhat does the "N" in the XT4NU3150AY8000XXX part number signify?
The "N" indicates that this breaker has a "Normal" interrupting capacity rating within the ABB Tmax XT4 series. For this 150A model, the normal rating provides up to 65kA at 240VAC and 25kA at 480VAC.
Which panelboards are compatible with the XT4NU3150AY8000XXX?
This XT4 frame breaker is designed for use in ABB ReliaGear neXT Power Panels, ReliaGear SB Switchboards, and SACE Tmax XT Panelboards. Ensure you have the correct XT4 mounting kit and hardware for your specific panel type.
Are the thermal and magnetic trip settings adjustable on this model?
No. This specific model features a fixed thermal and fixed magnetic (TMF) trip unit. Both the long-time (overload) and instantaneous (short-circuit) protection thresholds are factory-set for 150A and cannot be adjusted in the field.
Can the XT4NU3150AY8000XXX be used in DC applications?
Yes, this breaker is rated for both AC and DC systems. It provides a 35kA interrupting capacity at 250VDC and 600VDC. When applying this breaker in DC circuits, ABB requires wiring multiple poles in series depending on the voltage level to safely extinguish the DC arc.
What does the "LI" trip function code indicate?
The "LI" designation means the thermal-magnetic trip unit provides Long-Time (L) protection for overloads and Instantaneous (I) protection for short circuits. Both of these protection thresholds are fixed on this specific model.
Are mounting lugs included with the XT4NU3150AY8000XXX?
Yes, this breaker comes factory-equipped with lugs that accept both copper and aluminum wire ranging from 3/0 AWG to 350 kcmil. Always apply a listed oxide inhibitor when terminating aluminum conductors and torque to the specifications printed on the breaker faceplate.
Is this breaker suitable for high-fault 480V systems?
The XT4NU3150AY8000XXX has a "Normal" interrupting rating, providing up to 25kA of fault clearing capacity at 480VAC. If your system requires a higher interrupting rating at 480V, you will need to select an XT4 model with a Standard (S), High (H), or Extra High (X) rating.
What is the maximum voltage this breaker can safely interrupt?
The XT4NU3150AY8000XXX is rated to safely interrupt faults up to 600VAC (at 18kA) and 600VDC (at 35kA). Never install this breaker in systems where the nominal voltage exceeds these maximum limits.
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