ABB XT4NU3225BYJ000XXX Molded Case Circuit Breaker
- 225A
- 3 Pole
- Unit Mount
ABB
XT4NU3225BYJ000XXX
Molded Case Circuit Breaker
Brand
ABB
SKU
XT4NU3225BYJ000XXX
Quantity
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ABB XT4NU3225BYJ000XXX - 225A 3 Pole Molded Case Circuit Breaker
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Description
Belonging to ABB's SACE Tmax XT family, the XT4NU3225BYJ000XXX functions as a 3-pole, 225A molded case circuit breaker. Engineered for commercial and industrial applications, it features a TMA trip unit with adjustable thermal and magnetic settings for precise protection. This unit mounts into ABB ReliaGear neXT panelboards and SB switchboards. Rated for 65kAIC at 240VAC and 25kAIC at 480VAC, it provides robust current-limiting performance.Specifications
| Brand | ABB |
|---|---|
| Series | XT4 |
| Amperage | 225A |
| 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 |
| Amperage Range | 157.5-225A |
|---|
| Terminal Type | Lugs |
|---|---|
| For Use With | ABB ReliaGear neXT Panelboards, ABB ReliaGear SB Switchboards |
| Wire Gauge | 4 AWG - 300 kcmil (Cu/Al) |
| Max Wire | 300 kcmil |
| Min Wire | 4 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 |
|---|---|
| Accessories | Lugs Included |
| Standards | CSA C22.2 No. 5, IEC 60947-2, UL 489 |
| Approval | CCC, CSA, cULus, IEC, KEMA, UL |
| Temp Rating | -25C to 70C |
| Construction Features | HACR Rated, Reverse Feed |
Product FAQs
8 answersWhich ABB distribution equipment is designed to house this XT4 breaker?
This specific unit is engineered for integration into ABB ReliaGear neXT panelboards and ABB ReliaGear SB switchboards.
Does this breaker plug directly into a panelboard bus?
No, the XT4NU3225BYJ000XXX is a unit mount breaker. It requires bolted connections to the panelboard or switchboard chassis and is not a plug-in style breaker.
What does the N designation in the XT4N part number signify?
The N indicates a Normal interrupting capacity tier within the ABB SACE Tmax XT family. This specific tier dictates the fault current limits, providing 25kA at 480VAC and 65kA at 240VAC for this frame size.
How does the adjustable thermal magnetic trip unit benefit panel builders?
The adjustable thermal and magnetic settings allow electricians to precisely match the breaker trip curve to the specific load and inrush characteristics of the circuit, preventing nuisance tripping while maintaining strict protection.
Are the included lugs rated for aluminum wiring?
Yes, the factory-installed lugs are dual-rated for both copper and aluminum conductors. They accept wire sizes ranging from 4 AWG up to 300 kcmil.
Is the XT4NU3225BYJ000XXX suitable for direct current applications?
Yes, because it utilizes a thermal magnetic trip unit, it is fully rated for DC circuits. It provides a 35kA interrupting capacity at both 250VDC and 600VDC.
Can this Tmax XT breaker replace older GE Spectra RMS breakers?
While the ABB SACE Tmax XT series is the modern replacement for legacy GE molded case circuit breakers, direct physical replacement requires specific retrofit kits due to differences in mounting hardware and dimensions.
What specific fault conditions does the LI trip function code cover?
The LI code specifies Long-Time and Instantaneous protection. The Long-Time function safeguards against sustained overloads, and the Instantaneous function provides immediate interruption during severe short-circuit faults.
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