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1SDA070170R1 ABB XT3N 250 TMD 250A 4-Pole Circuit Breaker
ABB 1SDA070170R1 XT3N 250 is a 250 A four-pole fixed moulded case circuit breaker with TMD thermomagnetic protection, 100% rated neutral and a rated voltage up to 690 V AC.
£1,230.10
Why Choose the ABB 1SDA070170R1 XT3N 250 Circuit Breaker?
The ABB 1SDA070170R1 is a high-performance four-pole moulded case circuit breaker (MCCB) designed for reliable protection and isolation of low-voltage electrical distribution systems. Part of the ABB SACE Tmax XT / T-Max XT 250 range, this XT3N breaker combines compact construction with thermomagnetic protection for industrial, commercial and infrastructure applications.
The XT3N 250 features an integrated TMD thermomagnetic trip unit, providing overload and instantaneous short-circuit protection without requiring an external protection relay. Its fixed configuration, front terminals and fully rated neutral make it suitable for four-wire distribution systems where dependable protection of all conductors is required.
With a rated continuous current of 250 A, rated operational voltage up to 690 V AC and an instantaneous short-circuit release of 2500 A, the 1SDA070170R1 provides robust circuit protection in demanding installations. This version is rated for operation at 50 °C and incorporates a neutral pole rated at 100% of the phase current.
Key Advantages
- Compact ABB SACE Tmax XT3 moulded case circuit breaker for low-voltage distribution.
- 250 A rated continuous current for industrial and commercial power systems.
- Four-pole configuration with 100% rated neutral for three-phase four-wire networks.
- Integrated TMD thermomagnetic trip unit provides overload and short-circuit protection.
- 36 kA ultimate short-circuit breaking capacity at 400 V AC, 50 Hz.
- Fixed mounting with front terminals simplifies switchboard and panel installation.
- Designed for operation at an ambient reference temperature of 50 °C.
Key Features
- ABB SACE Tmax XT3N 250 series.
- 250 A rated current.
- Four-pole fixed circuit breaker.
- Fully rated neutral at 100% In.
- TMD thermomagnetic release.
- Thermal overload setting range of approximately 175–250 A.
- Instantaneous magnetic short-circuit release set to 2500 A.
- 690 V AC rated voltage.
- Front-positioned main circuit terminals with bolt connections.
- Manual toggle operating mechanism with optional motorised operation accessories.
Reliable Circuit Protection for Electrical Distribution
Moulded case circuit breakers such as the ABB XT3N 250 protect electrical installations against excessive current caused by overloads and short circuits. The integrated thermomagnetic release combines thermal overload protection with rapid magnetic operation during high-current fault conditions, helping protect cables, switchgear and connected equipment.
The SACE Tmax XT range is engineered for compact electrical distribution assemblies and offers flexible installation and accessory options. The four-pole configuration of this model provides switching across all four poles, while the fully rated neutral makes it particularly suitable for systems where significant neutral current may be present.
Typical Applications
- Industrial low-voltage distribution boards.
- Commercial electrical distribution systems.
- Machine and production-line power distribution.
- Switchboards and control panels.
- Building services and infrastructure installations.
- Four-wire three-phase systems requiring a fully rated neutral.
Technical Specifications
| Series | SACE Tmax XT / T-Max XT 250 Range |
|---|---|
| Frame size | XT3 |
| ABB order code | 1SDA070170R1 |
| Product type | Moulded case circuit breaker (MCCB) |
| Rated continuous current (Iu) | 250 A |
| Rated voltage | up to 690 V AC |
| Number of poles | 4 |
| Neutral rating | 100% of phase current |
| Trip unit | TMD thermomagnetic |
| Thermal overload setting | approximately 175–250 A |
| Instantaneous short-circuit release | 2500 A |
| Ultimate breaking capacity (Icu) at 400 V AC, 50 Hz | 36 kA |
| Breaking capacity class | N |
| Reference temperature | 50 °C |
| Installation | Fixed |
| Terminal position | Front |
| Main circuit connection | Bolt connection |
| Operating mechanism | Toggle |
| Protection rating | IP20 |
| Standard | IEC |
| Weight | approx. 2.1 kg |
Frequently Asked Questions
What is the ABB 1SDA070170R1 used for?
The ABB 1SDA070170R1 is a four-pole moulded case circuit breaker used to protect low-voltage electrical distribution circuits against overloads and short circuits.
What is the rated current of the ABB XT3N 250 1SDA070170R1?
The circuit breaker has a rated continuous current of 250 A, with a TMD thermal overload setting range of approximately 175–250 A.
What is the breaking capacity of this circuit breaker?
The XT3N 250 has an ultimate short-circuit breaking capacity of 36 kA at 400 V AC, 50 Hz.
Does the ABB 1SDA070170R1 have a fully rated neutral?
Yes. This four-pole version has a 100% rated neutral, meaning the neutral pole is rated for the same continuous current as the phase poles.
What type of trip unit does the ABB XT3N 250 use?
The breaker uses an integrated TMD thermomagnetic trip unit, providing thermal overload protection and instantaneous magnetic short-circuit protection.
Trusted for Low-Voltage Electrical Protection
ABB SACE Tmax XT moulded case circuit breakers are widely used in industrial and commercial electrical distribution systems, providing compact, dependable circuit protection and flexible integration into modern switchboards and control panels.
