Free Shipping Over $99
Free Shipping Over $99
Free Shipping Over $99
Free Shipping Over $99
ABB XT4NU3125AFJ000XXX Molded Case Circuit Breaker
- 125A
- 3 Pole
- Unit Mount
ABB
XT4NU3125AFJ000XXX
Molded Case Circuit Breaker
Brand
ABB
SKU
XT4NU3125AFJ000XXX
Quantity
Shop with Confidence
Add an extra year of protection in your cart.
ABB XT4NU3125AFJ000XXX - 125A 3 Pole Molded Case Circuit Breaker
New
Quantity
Similar Items
125A 3 Pole Molded Case Circuit Breaker
100A 3 Pole Molded Case Circuit Breaker
100A 3 Pole Molded Case Circuit Breaker
Description
Engineered for industrial applications, the ABB XT4NU3125AFJ000XXX is a 125A molded case circuit breaker from the SACE Tmax XT family. It provides reliable overcurrent protection for heavy-duty electrical systems. This unit mount MCCB integrates into ABB ReliaGear neXT panelboards and SB switchboards. It also serves as a replacement for legacy T4N125TW breakers. Featuring fixed thermal-magnetic trip functions, this HACR-rated breaker delivers a 25kAIC rating at 480VAC and double insulation.Specifications
| Brand | ABB |
|---|---|
| Series | XT4 |
| Amperage | 125A |
| 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 Panelboards, 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 | Fixed Thermal, Fixed Magnetic |
| Available Options | Shunt Trip, Auxiliary Switch, Undervoltage Release, Motor Operator |
|---|---|
| Accessories | Line and Load 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, Double Insulation |
Product FAQs
5 answersWhich panelboards and switchboards are compatible with the XT4NU3125AFJ000XXX?
This unit mount breaker is designed for integration into ABB ReliaGear neXT panelboards and ReliaGear SB switchboards. It requires the appropriate mounting hardware kits for secure unit mount installation.
What wire sizes are accepted by the lugs on this XT4 breaker?
The factory-installed lugs accept copper or aluminum conductors ranging from 4 AWG to 300 kcmil. Always verify the specific torque requirements listed on the breaker faceplate or ABB instruction sheet before terminating.
Can the XT4NU3125AFJ000XXX be utilized in DC circuits?
Yes, this thermal magnetic breaker is rated for DC applications up to 600 VDC. It provides a 35 kA interrupting capacity at both 250 VDC and 600 VDC, making it suitable for various industrial DC loads.
Are the thermal and magnetic trip settings adjustable on this model?
No, this specific SKU features a fixed thermal and fixed magnetic trip unit. The long-time (L) and instantaneous (I) protection functions are factory set and cannot be modified in the field.
What do the letters 'N' and 'U' signify in the XT4NU3125AFJ000XXX catalog number?
In the ABB SACE Tmax XT nomenclature, the 'N' designates the normal interrupting capacity tier for the XT4 frame, which corresponds to 25 kA at 480 VAC. The 'U' indicates that the breaker is a UL 489 listed device.
SuperClub
Join free. Get 500 SuperPoints.
Earn points on eligible purchases and redeem them at checkout.
100 SuperPoints = $1 off.
Warranties
Add an extra year of protection
60-Day Warranty
Your purchase includes 60 days of SuperBreakers warranty coverage.
Add a 1-year warranty extension in your cart.
Get a Quote
Don’t see what you’re looking for?
We source obsolete and hard-to-find parts every day.
Shipping
Free Shipping Policy
Parcel shipments with item value over $99 qualify for free economy shipping within the continental US. Please call to confirm special handling instructions. We do not charge a handling fee or require a minimum amount on any order. SuperBreakers does not ship on customer accounts.
Same Day Shipping
We strive to ship out your items the same day the order is placed. In rare circumstances SuperBreakers may reserve up to 5 business days to consolidate orders for complete shipment.
Expedited Shipments
Orders being shipped via Next Day Air, 2 Day Shipping or 3 Day Shipping must be received by 3 PM EST to guarantee same-day shipments. Expedited orders only ship on normal business days. Shipments will NOT be sent out on Saturdays and Sundays.
International Shipping
All International orders require a $1,000 minimum order threshold. Due to the special nature of these shipments, we require that these be placed with a SuperBreakers representative. Additional shipping and instructions will apply. All International Orders are Non-Cancel and Non-Refundable.