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ABB XT1NU3125AAA000XXX Molded Case Circuit Breaker
- 125A
- 3 Pole
- Unit Mount
ABB
XT1NU3125AAA000XXX
Molded Case Circuit Breaker
Brand
ABB
SKU
XT1NU3125AAA000XXX
Quantity
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ABB XT1NU3125AAA000XXX - 125A 3 Pole Molded Case Circuit Breaker
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Description
Operating within the XT1 frame, the ABB XT1NU3125AAA000XXX is a 3-pole, 125A molded case circuit breaker. It provides essential power distribution and circuit protection for demanding commercial and industrial environments. This unit mount MCCB installs into ABB SACE Tmax XT panelboards, switchboards, and enclosures. It is an exact drop-in replacement for discontinued Tmax T1 series breakers. Rated 25kAIC at 480VAC, it features a fixed thermal magnetic trip unit and includes terminal lugs.Specifications
| Brand | ABB |
|---|---|
| Series | XT1 |
| Amperage | 125A |
| Poles | 3 |
| Mounting Style | Unit Mount |
| Voltage | 240VAC, 480Y/277VAC, 480VAC, 600Y/347VAC, 250VDC |
| Phase | 3 |
| AIC Rating | 50kA @ 240VAC, 25kA @ 480Y/277VAC, 25kA @ 480VAC, 18kA @ 600Y/347VAC, 35kA @ 250VDC |
| Frame Type | XT1N |
|---|---|
| Terminal Type | Lugs |
| For Use With | ABB SACE Tmax XT Panelboards, Switchboards, Enclosures |
| Wire Gauge | 14 AWG - 1/0 AWG (Cu) |
| Max Wire | 1/0 AWG |
| Min Wire | 14 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, Padlock Attachment |
|---|---|
| Accessories | Line and Load Lugs Included, Mounting Hardware, Phase Barriers |
| Standards | CSA C22.2 No. 5, IEC 60947-2, UL 489 |
| Approval | CE, CSA, IEC, UL |
| Temp Rating | -25C to 70C |
| Construction Features | HACR Rated, Reverse Feed, Trip-Free Mechanism, Double Insulated |
Product FAQs
8 answersCan this 3-pole XT1 breaker be used in single-phase applications?
Yes, ABB XT1 three-pole circuit breakers can be used in single-phase applications. According to UL standards, they are marked as suitable for single-phase applications up to 347VAC.
Is the ABB XT1NU3125AAA000XXX suitable for reverse feeding?
Yes, power can be supplied to the bottom terminals of the XT1 breaker up to its maximum voltage rating without compromising its protective capabilities.
What is the ambient operating temperature range for this breaker?
Tmax XT circuit breakers are designed to operate in ambient air temperatures ranging from -25 degrees Celsius to +70 degrees Celsius. The reference temperature for the thermal magnetic trip unit is +40 degrees Celsius.
Can the XT1NU3125AAA000XXX replace older ABB Tmax T1 breakers?
Yes, the XT1 frame is designed as a direct drop-in replacement for the discontinued ABB SACE Tmax T1 series breakers, fitting the same panelboards and enclosures.
What does the N signify in the XT1N frame designation?
The N indicates a Normal interrupting capacity for the XT1 frame, which provides a maximum interrupting rating of 25kA at 480VAC and 50kA at 240VAC.
What type of trip unit is installed in the XT1NU3125AAA000XXX?
This breaker features a Thermal Magnetic Fixed (TMF) trip unit. Both the long-time (thermal) and instantaneous (magnetic) trip functions are fixed and non-adjustable.
What equipment is compatible with the XT1NU3125AAA000XXX?
This unit mount molded case circuit breaker is designed for installation in ABB SACE Tmax XT panelboards, switchboards, and compatible industrial enclosures.
Does this breaker provide ground fault protection?
No, this breaker is equipped with an LI (Long-Time, Instantaneous) trip unit. It provides overload and short circuit protection, but does not include integrated ground fault protection.
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