ABB XT5NU340AFFF000XXX Molded Case Circuit Breaker
- 400A
- 3 Pole
- Unit Mount
Quantity
ABB XT5NU340AFFF000XXX - 400A 3 Pole Molded Case Circuit Breaker
Re-Certified
Quantity
Description
Built for commercial and industrial applications, this 400A molded case circuit breaker features an Ekip Dip LSI electronic trip unit. It provides adjustable long-time, short-time, and instantaneous protection for precise system coordination. Designed for unit mount installations, it fits ReliaGear neXT panelboards and replaces legacy Spectra RMS SG400 models. Rated for 35kA at 480VAC, it includes true RMS sensing and front terminal lugs for reliable performance.Specifications
| Brand | ABB |
|---|---|
| Series | XT5 |
| Amperage | 400A |
| Poles | 3 |
| Mounting Style | Unit Mount |
| Voltage | 240VAC, 480VAC, 600Y/347VAC, 600VDC |
| Phase | 3 |
| AIC Rating | 65kA @ 240VAC, 35kA @ 480VAC, 18kA @ 600Y/347VAC, 16kA @ 600VDC |
| Amperage Range | 160-400A |
|---|
| Frame Type | XT5 |
|---|---|
| Terminal Type | Lugs |
| For Use With | ReliaGear neXT Panelboards, ReliaGear SB Switchboards, ABB SACE Tmax XT Enclosures |
| Wire Gauge | 2x 2/0 AWG - 500 kcmil |
| Max Wire | 500 kcmil |
| Min Wire | 2/0 AWG |
| Trip Technology | Electronic Trip |
|---|---|
| Trip Function Code | LSI |
| Trip Function | Long-Time, Short-Time, Instantaneous |
| Trip Adjustability | Adjustable |
| Available Options | Shunt Trip, Auxiliary Switch, Undervoltage Release, Motor Operator, Padlock Attachment, Rotary Handle |
|---|---|
| Accessories | None (Standard Configuration) |
| Standards | CSA C22.2 No. 5, IEC 60947-2, UL 489 |
| Approval | CCC, CSA, cULus, HACR, IEC, UL |
| Temp Rating | -25C to 70C |
| Construction Features | HACR Rated, True RMS Sensing |
Product FAQs
6 answersWhat panelboards and enclosures are compatible with the XT5NU340AFFF000XXX breaker?
This 400A breaker is designed for installation in ABB ReliaGear neXT panelboards, ReliaGear SB switchboards, and standard ABB SACE Tmax XT enclosures.
What does the N in the XT5NU340AFFF000XXX catalog number indicate?
The N designates the Normal interrupting capacity tier for the XT5 frame. This provides a short-circuit rating of 35kA at 480VAC and 65kA at 240VAC.
What wire sizes are accepted by the factory-installed lugs on this XT5 breaker?
The included front terminal lugs accept two conductors per phase, accommodating wire sizes from 2/0 AWG to 500 kcmil. Ensure proper torque specifications are applied during installation.
What type of protection does the Ekip Dip LSI trip unit provide?
The Ekip Dip LSI is an electronic solid-state trip unit that offers adjustable Long-Time, Short-Time, and Instantaneous protection. This allows for precise coordination with other protective devices in your AC electrical system.
Is this ABB XT5 breaker configured for fixed or drawout mounting?
The FFF in the catalog number indicates this is a fixed-mount breaker with front terminals. It is designed for standard unit mounting and is not configured for drawout or plug-in applications.
Can the XT5NU340AFFF000XXX replace older GE Spectra RMS circuit breakers?
Yes, the ABB SACE Tmax XT series serves as the modern replacement for legacy GE Industrial circuit breakers, including the Spectra RMS SG400 models. Note that specific retrofit kits or mounting hardware may be required when upgrading older enclosures.
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.