ABB XT5LU340ABYN000XXX Molded Case Circuit Breaker
- 400A
- 3 Pole
- Unit Mount
Quantity
ABB XT5LU340ABYN000XXX - 400A 3 Pole Molded Case Circuit Breaker
New
Quantity
Description
Designed for maximum flexibility, this 400-amp molded case circuit breaker provides advanced thermal-magnetic protection for demanding marine and industrial environments. The XT5 frame ensures reliable current-limiting performance across 600V systems. This model mounts into ReliaGear neXT panelboards and SACE Tmax XT enclosures. It serves as an excellent upgrade path for legacy Spectra RMS SG400 installations. Supplied without standard lugs, it allows custom terminal selection.Specifications
| Brand | ABB |
|---|---|
| Series | XT5 |
| Amperage | 400A |
| Poles | 3 |
| Mounting Style | Unit Mount |
| Voltage | 240VAC, 480VAC, 600VAC, 600VDC |
| Phase | 3 |
| AIC Rating | 200kA @ 240VAC, 100kA @ 480VAC, 65kA @ 600VAC, 50kA @ 600VDC |
| Amperage Range | 280-400A |
|---|
| Frame Type | XT5L |
|---|---|
| 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 (Cu/Al) |
| Max Wire | 500 kcmil |
| Min Wire | 2/0 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, Motor Operator, Terminal Shields, Lug Kits |
|---|---|
| Accessories | Lugs Not Included |
| Standards | CSA C22.2 No. 5, IEC 60947-2, UL 489 |
| Approval | CCC, CSA, cULus, IEC, UL |
| Temp Rating | -25C to 70C |
| Construction Features | HACR Rated, Current Limiting, Reverse Feed |
Product FAQs
5 answersWhat are the wire size and material requirements for the lugs on this XT5 breaker?
The factory-installed lugs accept dual 2/0 AWG to 500 kcmil conductors per phase. They are dual-rated for both copper (Cu) and aluminum (Al) wiring, making them versatile for various high-amperage feeder applications.
Which ABB electrical distribution systems are compatible with this XT5L frame?
This breaker is engineered for integration with ABB ReliaGear neXT panelboards, ReliaGear SB switchboards, and standard ABB SACE Tmax XT enclosures.
How do the adjustable thermal and magnetic trip settings benefit my installation?
The adjustable thermal (Long-Time) and adjustable magnetic (Instantaneous) dials allow precise tuning of the breaker's response curve. This flexibility helps engineers and electricians achieve selective coordination with downstream load devices and prevent nuisance tripping.
Can this molded case circuit breaker be used in DC systems?
Yes, it is rated for up to 600VDC with a 50kA interrupting capacity. This makes it suitable for heavy-duty industrial DC circuits, solar PV systems, or battery storage applications requiring thermal magnetic protection.
Is the XT5LU340ABYN000XXX a drawout or unit mount breaker?
This specific configuration is a unit mount breaker. It requires permanent, bolted connections directly to the bus or backpan, rather than utilizing a plug-in base or drawout cassette assembly.
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