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ABB XT1NU3125AFF000XXX Molded Case Circuit Breaker
- 125A
- 3 Pole
- Unit Mount
ABB
XT1NU3125AFF000XXX
Molded Case Circuit Breaker
Brand
ABB
SKU
XT1NU3125AFF000XXX
Quantity
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ABB XT1NU3125AFF000XXX - 125A 3 Pole Molded Case Circuit Breaker
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Description
Built for demanding commercial and industrial environments, the XT1NU3125AFF000XXX is a 3-pole molded case circuit breaker from ABB's SACE Tmax XT1 frame series. It mounts into standard ABB Tmax XT panelboards, switchboards, and enclosures. This 125A breaker utilizes a fixed thermal magnetic trip unit (TMF) for reliable long-time and instantaneous (LI) protection.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 | XT1 |
|---|---|
| Terminal Type | Lugs |
| For Use With | ABB SACE Tmax XT Panelboards, Switchboards, Enclosures |
| 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, Padlock Attachment |
|---|---|
| Accessories | Lugs Not Included |
| Standards | CSA C22.2 No. 5, IEC 60947-2, UL 489 |
| Approval | CE, CSA, cULus, IEC, KEMA, RINA, UL |
| Temp Rating | -25C to 70C |
| Construction Features | HACR Rated, Reverse Feed, Double Insulated |
Product FAQs
8 answersWhat equipment is compatible with the XT1NU3125AFF000XXX?
This molded case circuit breaker is designed for installation in ABB SACE Tmax XT panelboards, switchboards, and compatible enclosures.
Can this Tmax XT1 circuit breaker be reverse fed?
Yes, ABB Tmax XT1 thermal-magnetic circuit breakers are reverse feed capable. Power can be supplied to either the top or bottom terminals without affecting the breaker's protective functions.
What does the N in the XT1NU3125AFF000XXX catalog number signify?
The N indicates a Normal interrupting capacity tier for the XT1 frame, providing a maximum interrupting rating of 50kAIC at 240VAC and 25kAIC at 480VAC.
What does the U in the catalog number indicate?
The U signifies that the circuit breaker is UL rated for use in North American electrical systems.
What does AFF mean in the ABB Tmax XT part number?
The AFF designation indicates that the breaker is equipped with a fixed thermal-magnetic trip unit and front terminals for fixed mounting.
How is the XT1NU3125AFF000XXX mounted?
This is a unit-mount, bolt-on circuit breaker. It secures directly to the mounting plate or chassis using standard hardware rather than snapping onto a DIN rail or busbar.
Can this breaker replace legacy GE Spectra series breakers?
Yes, the ABB Tmax XT1 frame is the designated replacement for legacy GE Spectra E-frame circuit breakers. A specific retrofit kit may be required to install this breaker into existing GE Spectra panelboards or switchboards.
What are the standard safety procedures for installing this ABB breaker?
Always de-energize the switchboard or panelboard before beginning installation. Verify the circuit is completely dead using a properly rated voltage meter and wear the required personal protective equipment (PPE) per NFPA 70E standards.
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