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1SDX254970R1 ABB EPX-XT4S-TM1003 100A 3-Pole 50kA TMA Thermal-Magnetic MCCB
ABB EPX-XT4S-TM1003 is a 100 A three-pole 50 kA moulded case circuit breaker from the Protecta Power Devices range, featuring TMA thermal-magnetic overload and short-circuit protection for low-voltage electrical distribution systems.
£688.49
Why Choose the ABB EPX-XT4S-TM1003 100A 3-Pole 50kA MCCB?
The ABB EPX-XT4S-TM1003 is a robust 100 A three-pole moulded case circuit breaker (MCCB) designed to provide reliable overload and short-circuit protection in low-voltage electrical distribution systems. Part of the ABB Protecta Power Devices range, this circuit breaker uses the established ABB SACE Tmax XT4S 160 A frame platform, combining dependable thermal-magnetic protection with substantial short-circuit interruption capability for commercial, industrial and building services installations.
Equipped with an ABB TMA thermal-magnetic trip unit, the EPX-XT4S-TM1003 provides thermal overload protection and magnetic short-circuit protection. The thermal element responds to sustained excessive current, helping protect cables and connected equipment against overheating, while the magnetic element provides rapid circuit interruption when short-circuit current reaches the applicable trip threshold. The TMA protection system offers adjustable trip characteristics without requiring an electronic trip unit or external auxiliary power supply.
With a rated current of 100 A, a three-pole configuration and a specified 50 kA short-circuit breaking capacity, this MCCB is suitable for protecting three-phase outgoing feeders and distribution circuits. Its ABB XT4S construction supports integration into compatible Protecta Power distribution boards, making it a practical choice for electrical contractors, panel builders, consulting engineers and maintenance professionals.
Key Advantages
- 100 A rated current: Suitable for protecting appropriately designed low-voltage three-phase electrical circuits.
- Three-pole construction: Provides coordinated switching and protection of three phase conductors.
- 50 kA breaking capacity: Offers substantial short-circuit interruption capability under the applicable rated conditions.
- ABB TMA thermal-magnetic protection: Combines overload and short-circuit protection within one moulded case circuit breaker.
- Adjustable thermal protection: Allows overload protection characteristics to be matched to suitable conductor and circuit requirements.
- Magnetic short-circuit protection: Provides rapid tripping when fault current reaches the magnetic protection threshold.
- Conventional protection technology: Does not require an electronic trip unit or external auxiliary power supply for basic protection operation.
- ABB Tmax XT4S platform: Uses established ABB circuit breaker technology for dependable electrical protection.
- 160 A frame class: Provides a common mechanical platform for compatible XT4S circuit breaker configurations.
- Protecta Power integration: Designed for appropriately configured ABB Protecta Power distribution assemblies.
- Manual switching and isolation: Supports circuit operation and safe isolation procedures when installed in accordance with manufacturer requirements.
- Robust construction: Suitable for commercial and industrial electrical distribution environments.
- Versatile applications: Suitable for outgoing feeders, distribution boards, switchgear assemblies and equipment supply circuits.
Key Features
- Manufacturer: ABB.
- Product group: Protecta Power Devices.
- Circuit breaker series: ABB SACE Tmax XT4.
- Performance designation: XT4S.
- Frame designation: XT4S 160.
- Rated current: 100 A.
- Number of poles: 3.
- Specified short-circuit breaking capacity: 50 kA.
- Trip unit technology: Thermal-magnetic.
- Trip unit designation: TMA.
- Thermal protection: Overload protection using a thermal trip mechanism.
- Magnetic protection: Short-circuit protection using an electromagnetic trip mechanism.
- Protection adjustment: TMA trip characteristics selected according to the manufacturer's available settings.
- Frame current class: 160 A.
- Three-pole switching: Coordinated operation of three phase conductors.
- Operating mechanism: Manual front-operated switching mechanism.
- Trip indication: Mechanical operating mechanism indicates a tripped condition.
- Accessory compatibility: Supports appropriately selected ABB Tmax XT4 mounting, connection and operating accessories.
- Distribution board compatibility: Intended for compatible ABB Protecta Power installations.
- Product family standard: IEC/EN 60947-2.
Reliable TMA Thermal-Magnetic Protection for Electrical Distribution
The ABB EPX-XT4S-TM1003 provides circuit protection through the combined operation of thermal and magnetic trip mechanisms. During sustained overload conditions, the thermal protection element responds to excessive current according to its time-current characteristics. This helps prevent prolonged overheating of electrical conductors, terminals and connected equipment. During short-circuit conditions, the magnetic protection element responds rapidly when fault current reaches the applicable trip threshold, initiating circuit interruption to reduce the consequences of electrical faults.
The ABB TMA trip unit provides conventional thermal-magnetic protection with adjustable characteristics suited to the selected breaker configuration. This allows electrical designers to coordinate overload protection with conductor capacity and evaluate short-circuit performance against the electrical installation's prospective fault current. Unlike electronic trip units, the thermal-magnetic system does not rely on electronic current measurement for its basic protective functions. The actual setting ranges should be confirmed from the markings and technical documentation for the supplied circuit breaker.
The ABB SACE Tmax XT4S platform combines robust moulded case construction with a specified 50 kA short-circuit breaking capacity, making the EPX-XT4S-TM1003 suitable for appropriately engineered distribution systems requiring substantial fault interruption capability. Its three-pole configuration is designed for three-phase circuits, while compatibility with ABB Protecta Power distribution assemblies helps simplify equipment selection for panel building and installation projects. Electrical engineers should verify the applicable operating voltage, prospective short-circuit current, protection settings and coordination with other protective devices before commissioning.
Typical Applications
- ABB Protecta Power distribution boards: Protection of compatible three-phase outgoing circuits.
- Commercial electrical distribution: Circuit protection in offices, retail premises and commercial buildings.
- Industrial switchboards: Overload and short-circuit protection for appropriately rated distribution feeders.
- Main and sub-distribution boards: Protection of outgoing electrical circuits requiring a 100 A MCCB.
- Electrical control panels: Protection of suitably designed three-phase equipment supply circuits.
- Building services: Electrical distribution for ventilation, heating, cooling and mechanical plant installations.
- Manufacturing facilities: Feeder protection for appropriately rated industrial electrical equipment.
- Commercial infrastructure: Electrical distribution in warehouses, educational facilities and public buildings.
- High-fault-level installations: Circuits requiring 50 kA short-circuit interruption capability at the applicable operating voltage.
- Electrical panel building: Distribution assemblies incorporating the ABB SACE Tmax XT4 circuit breaker platform.
Technical Specifications
| Product group | Protecta Power Devices |
|---|---|
| Product series | SACE Tmax XT4 |
| Product model | EPX-XT4S-TM1003 |
| ABB order code | 1SDX254970R1 |
| Corresponding ABB circuit breaker reference | 1SDA068307R1 |
| Product type | Moulded case circuit breaker (MCCB) |
| Frame designation | XT4S 160 |
| Frame current class | 160 A |
| Rated current (In) | 100 A |
| Number of poles | 3 |
| Specified short-circuit breaking capacity | 50 kA |
| Trip unit technology | Thermal-magnetic |
| Trip unit designation | TMA |
| Overload protection | Thermal trip mechanism |
| Short-circuit protection | Magnetic trip mechanism |
| Thermal protection adjustment | According to the TMA trip unit setting range |
| Magnetic protection characteristic | According to the TMA trip unit configuration |
| Electrical system | Low-voltage AC distribution |
| Phase configuration | Three-phase |
| Operating mechanism | Manual toggle operation |
| Primary function | Overload and short-circuit protection |
| Additional function | Circuit switching and isolation in accordance with manufacturer requirements |
| Product family standard | IEC/EN 60947-2 |
Frequently Asked Questions
What is the ABB EPX-XT4S-TM1003 used for?
The ABB EPX-XT4S-TM1003 is a 100 A three-pole thermal-magnetic moulded case circuit breaker designed to protect low-voltage electrical distribution circuits against overloads and short circuits. It is suitable for compatible ABB Protecta Power distribution boards and commercial or industrial electrical panels.
What is the rated current of the EPX-XT4S-TM1003?
The EPX-XT4S-TM1003 has a 100 A rated current and uses the ABB SACE Tmax XT4S 160 A frame platform. The 160 A frame designation identifies the current class of the circuit breaker platform rather than the rated current of this individual device.
What is the breaking capacity of this ABB MCCB?
The EPX-XT4S-TM1003 has a specified 50 kA short-circuit breaking capacity. The applicable rated operating voltage and manufacturer short-circuit performance conditions must be verified against the prospective fault current at the installation location.
What does TMA thermal-magnetic protection mean?
TMA identifies a thermal-magnetic trip unit that combines thermal overload protection with magnetic short-circuit protection. The thermal element responds to sustained excessive current, while the magnetic element provides rapid tripping during short-circuit conditions.
Can the overload and short-circuit settings be adjusted?
The ABB TMA trip unit provides adjustable thermal-magnetic protection characteristics according to its specific configuration. The available adjustment ranges should be checked against the supplied device and selected to suit conductor ratings, connected equipment and the electrical installation's protection requirements.
What is the difference between ABB XT4N and XT4S circuit breakers?
XT4N and XT4S identify different short-circuit performance versions within the ABB SACE Tmax XT4 family. The corresponding ABB Protecta Power XT4N devices are specified at 36 kA, while XT4S versions are specified at 50 kA. Selection should be based on the prospective fault current and the applicable operating voltage.
Is the EPX-XT4S-TM1003 suitable for three-phase electrical systems?
Yes. The EPX-XT4S-TM1003 has a three-pole configuration designed for switching and protecting three phase conductors. It is suitable for appropriately designed three-phase low-voltage distribution circuits where neutral switching through the breaker is not required.
Can the EPX-XT4S-TM1003 be installed in ABB Protecta Power distribution boards?
Yes. The EPX-XT4S-TM1003 belongs to the ABB Protecta Power Devices range and is intended for integration into compatible distribution assemblies. The correct XT4 mounting arrangement, electrical connections, enclosure compatibility and protection settings should be verified before installation.
Trusted by Electrical Engineers and Distribution Panel Builders
ABB SACE Tmax XT moulded case circuit breakers provide established protection technology for commercial and industrial electrical distribution, combining robust construction, practical thermal-magnetic protection and dependable short-circuit interruption capability for modern low-voltage power systems.
