Why Choose the ABB XT5N 400 TMA 320-3200 4-Pole Moulded Case Circuit Breaker?
The ABB 1SDA100383R1 is a high-performance four-pole moulded case circuit breaker (MCCB) from the ABB SACE Tmax XT range. Its full manufacturer designation is XT5N 400 TMA 320-3200 4p F F InN=100%In. Designed for industrial and commercial low-voltage electrical distribution, it combines a 400 A frame, a 320 A thermomagnetic trip unit and adjustable short-circuit protection.
Featuring ABB's TMA thermomagnetic release, the circuit breaker provides thermal overload protection and adjustable instantaneous magnetic short-circuit protection. Its 320 A rated trip current is complemented by an adjustable magnetic threshold of 1600–3200 A, allowing the instantaneous protection setting to be selected to suit the electrical installation.
The four-pole configuration with a fully rated neutral is particularly valuable in three-phase distribution systems where the neutral conductor requires a protection rating equivalent to the phase conductors. The designation InN=100%In identifies a neutral rating equal to 100% of the rated current.
Supplied in a fixed-mounted configuration with front terminals, the ABB XT5N 400 TMA is suitable for integration into appropriately designed distribution boards, switchboards and electrical control assemblies. Its compact dimensions of 205 × 186 × 103.5 mm and robust moulded case construction make it a practical solution for circuit protection where dependable switching, overload protection and short-circuit interruption are essential.
Key Advantages
- 400 A XT5 frame size provides a robust platform for industrial circuit protection.
- 320 A rated trip current for suitably designed electrical circuits.
- TMA thermomagnetic protection combines thermal overload and magnetic short-circuit functions.
- Adjustable instantaneous magnetic protection from 1600 to 3200 A.
- Adjustable thermal overload setting supports coordination with circuit requirements.
- Four-pole construction enables switching of three phases and neutral.
- 100% rated neutral provides a neutral current rating equivalent to the phase current rating.
- Fixed-mounted design supports permanent installation in electrical assemblies.
- Front terminal connections simplify integration into suitable switchboard layouts.
- Normal (N) breaking-capacity class within ABB's XT5 product family.
- Suitable for AC and DC applications within the manufacturer's published electrical ratings.
- Integrated protection and switching reduces the need for separate overload and short-circuit protective devices for the protected circuit.
- Compact moulded case construction supports efficient use of panel space.
- ABB SACE Tmax XT technology designed for professional low-voltage power distribution.
- IEC-standard circuit breaker design for industrial and commercial installations.
Key Features
- ABB SACE Tmax XT series.
- XT5 frame size.
- XT5N normal breaking-capacity version.
- 400 A frame designation.
- 320 A rated current.
- Four-pole (4P) configuration.
- Fully rated neutral: InN=100%In.
- TMA thermomagnetic trip unit.
- Adjustable thermal overload protection.
- Thermal adjustment range: 128–320 A.
- Adjustable instantaneous magnetic protection.
- Magnetic adjustment range: 1600–3200 A.
- Fixed-mounted construction.
- Front power terminals.
- Manual toggle operation.
- AC/DC circuit breaker design, subject to application-specific ratings.
- No integrated earth-fault protection.
- 205 × 186 × 103.5 mm product dimensions.
- Approximately 5.6 kg net weight.
- ABB product ID 1SDA100383R1.
Technical Specifications
- Manufacturer: ABB
- Series: SACE Tmax XT
- Frame family: XT5
- Model: XT5N 400 TMA 320-3200 4p F F InN=100%In
- ABB order code: 1SDA100383R1
- ABB product ID: 1SDA100383R1
- ABB product group: T-Max XT 250 Range
- Alternative catalogue number: XT5NE432ABFF000XXX
- Product type: Moulded case circuit breaker (MCCB)
- Frame size: XT5 400
- Frame current designation: 400 A
- Rated current (In): 320 A
- Number of poles: 4
- Neutral rating: 100% of rated current
- Neutral designation: InN=100%In
- Breaking-capacity classification: N (Normal)
- Trip unit type: TMA
- Protection technology: Thermomagnetic
- Thermal overload adjustment range: 128–320 A
- Instantaneous magnetic protection adjustment range: 1600–3200 A
- Magnetic threshold designation: I3
- Rated insulation and operational voltage: Subject to ABB's AC/DC application-specific ratings
- Mounting configuration: Fixed
- Main terminal arrangement: Front terminals
- Operating mechanism: Manual toggle
- Application: AC and DC electrical circuits within published ratings
- Integrated earth-fault protection: No
- Integrated motor operator: No
- Optional motor operating accessories: Available subject to compatibility
- Product net height: 205 mm
- Product net width: 186 mm
- Product net depth: 103.5 mm
- Dimensions (H × W × D): 205 × 186 × 103.5 mm
- Net weight: Approximately 5.6 kg
- EAN / GTIN: 8056221004602
- Minimum order quantity: 1 piece
- Customs tariff number: 85362090
- Applicable circuit breaker standard: IEC 60947-2
Advanced Thermomagnetic Circuit Protection for Industrial Power Distribution
The ABB XT5N 400 TMA 320-3200 provides both switching and automatic circuit protection within a single moulded case assembly. Unlike a conventional switch-disconnector, this MCCB incorporates a thermomagnetic release that can automatically interrupt the circuit when overload or short-circuit conditions exceed the selected protection settings.
The thermal overload element is designed to respond to sustained overcurrent conditions. Its adjustable setting range of 128–320 A allows the protection threshold to be matched to the protected circuit, subject to conductor ratings, operating conditions and the required protection coordination.
The instantaneous magnetic element provides rapid tripping when the fault current reaches the selected threshold. For this model, ABB specifies an adjustable magnetic range of 1600–3200 A. Selecting the correct setting is important for coordinating downstream protective devices and accommodating permissible starting or inrush currents without compromising fault protection.
The four-pole design provides a switching arrangement for three phase conductors and a neutral conductor. The InN=100%In designation confirms that the neutral is fully rated relative to the circuit breaker's rated current. This makes the model relevant to electrical distribution systems where the neutral may carry significant current, although the suitability of the neutral protection arrangement must be assessed against the installation design.
The fixed-mounted configuration is intended for permanent integration into electrical panels and switchboards. Its front terminals provide a defined connection arrangement for incoming and outgoing power conductors. Correct conductor preparation, terminal torque, clearances and accessory selection must follow ABB's installation documentation.
The XT5N designation identifies the normal breaking-capacity version of ABB's XT5 circuit breaker family. The numerical short-circuit breaking capacity must be checked for the intended operating voltage and current type before installation. The selected MCCB must have sufficient breaking capacity for the prospective fault current at its installation point.
Although the TMA release provides thermal overload and magnetic short-circuit protection, this model does not incorporate integrated earth-fault protection. Where residual-current or earth-fault protection is required, compatible additional protective equipment must be specified as part of the overall electrical system.
Installation, Protection Coordination and Operational Considerations
The ABB 1SDA100383R1 should be installed by competent electrical personnel in accordance with ABB's instructions and the applicable electrical installation standards. The installation must be designed for the correct operational voltage, prospective short-circuit current, conductor sizes and environmental conditions.
The distinction between the 400 A frame designation and the 320 A rated trip current is essential. This product is an XT5 400-frame circuit breaker fitted with a 320 A TMA release. It should not be described as having a 400 A rated trip current.
The thermal and magnetic protection settings must be selected according to the circuit's electrical design. These settings should account for conductor current-carrying capacity, load characteristics, inrush current, fault levels and the required discrimination or selectivity with upstream and downstream protective devices.
For installations incorporating a neutral conductor, the fully rated neutral arrangement provides a neutral rating equivalent to the phase rating. However, neutral switching and protection requirements must still comply with the relevant earthing system and installation regulations. Protective earth conductors must never be interrupted by the circuit breaker.
The MCCB is supplied with a manual operating mechanism and may be used with compatible ABB accessories where the installation requires additional operating, signalling or control functionality. Accessory compatibility must be confirmed using ABB's XT5 documentation.
Regular inspection and maintenance should follow ABB's published recommendations. Any evidence of overheating, damaged terminals, repeated tripping or mechanical deterioration should be investigated by qualified personnel before the equipment is returned to service.
Typical Applications
- Industrial low-voltage electrical distribution boards.
- Commercial building main and sub-distribution systems.
- Three-phase and neutral power distribution circuits.
- Industrial machinery supply protection.
- Manufacturing and production facilities.
- Electrical switchboards and panel assemblies.
- Industrial plant rooms and switchrooms.
- Large heating, ventilation and air conditioning installations.
- Pumping stations and water treatment facilities.
- Process control and automation power supplies.
- Industrial motor feeder protection where correctly coordinated.
- Commercial infrastructure and building services.
- OEM electrical control and distribution assemblies.
- Applications requiring adjustable thermal and magnetic protection.
- Electrical systems requiring a fully rated neutral pole.
