ABB XT5HU340ABFN000XXX Molded Case Circuit Breaker
- 400A
- 3 Pole
- Unit Mount
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ABB XT5HU340ABFN000XXX - 400A 3 Pole Molded Case Circuit Breaker
New
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Description
Engineered for demanding industrial applications, the ABB XT5HU340ABFN000XXX is a 3-pole, 400A molded case circuit breaker from the SACE Tmax XT5 frame family. It features an adjustable thermal-magnetic trip unit (TMA) for precise overload and short-circuit protection. Rated at 65kAIC at 480VAC, this unit-mount MCCB comes equipped with standard front terminals. It serves as a seamless, modern upgrade for legacy Tmax T5 and Spectra Series breakers when paired with the appropriate retrofit kits.Specifications
| Brand | ABB |
|---|---|
| Series | XT5 |
| Amperage | 400A |
| Poles | 3 |
| Mounting Style | Unit Mount |
| Voltage | 600VAC, 600VDC |
| Phase | 3 |
| AIC Rating | 150kA @ 240VAC, 65kA @ 480VAC, 35kA @ 600VAC, 70kA @ 250VDC, 50kA @ 500VDC, 35kA @ 600VDC |
| Amperage Range | 280-400A |
|---|
| Terminal Type | Lugs |
|---|---|
| For Use With | ABB ReliaGear neXT Panelboards, ABB ReliaGear SB Switchboards, ABB SACE Tmax XT Enclosures |
| Wire Gauge | 2x 2/0 AWG to 500 kcmil, Cu/Al |
| 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, Alarm Switch, Padlock Attachment, Motor Operator |
|---|---|
| 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 | Current Limiting, HACR Rated, Reverse Feed |
Product FAQs
5 answersWhat does the "H" in the XT5HU340ABFN000XXX catalog number signify?
The "H" indicates a High interrupting capacity tier within the Tmax XT5 frame family. This specific tier provides a short-circuit rating of 65 kA at 480V AC and up to 150 kA at 240V AC.
Can the ABB XT5HU340ABFN000XXX replace legacy GE Spectra series breakers?
Yes. Following ABB's acquisition of GE Industrial Solutions, the SACE Tmax XT line is the designated upgrade path for obsolete GE Spectra RMS breakers. When installing an XT5 breaker in an existing GE Spectra panelboard or switchboard, an approved ABB retrofit kit is required for proper mechanical mounting and bus connections.
How are the trip thresholds adjusted on the XT5HU340ABFN000XXX?
This breaker is equipped with a Thermal Magnetic Adjustable (TMA) trip unit. Electricians can modify both the long-time thermal overload and the instantaneous magnetic short-circuit pickup levels using the rotary dials located on the front face of the breaker.
How is the XT5HU340ABFN000XXX wired for higher DC voltage applications?
While this breaker is rated to provide DC protection up to 600V DC, achieving interruption ratings at 500V DC or 600V DC requires wiring multiple poles in series. Installers must follow ABB's Tmax XT technical guidelines to ensure the poles are configured correctly to safely clear high-voltage DC faults.
Can the XT5HU340ABFN000XXX be reverse fed?
Yes. Because this model utilizes a standard thermal-magnetic trip unit and lacks specific line and load directional markings, it is suitable for reverse feeding. Installers must ensure the setup complies with local electrical codes regarding reverse-fed circuit breakers.
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