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1sda054478r1 t5n 400 tma 400-4000 4 pole abb mccb
ABB 1SDA054478R1 SACE Tmax T5N 400 A four-pole moulded case circuit breaker with thermal-magnetic trip unit, front terminals and fully rated neutral for industrial power distribution.
£2,227.35
Why Choose the ABB 1SDA054478R1 T5N 400 TMA 400-4000 Circuit Breaker?
The ABB 1SDA054478R1 is a premium SACE Tmax T5N moulded case circuit breaker (MCCB) designed to provide dependable overload and short-circuit protection for industrial and commercial low-voltage power distribution systems. Manufactured as part of ABB's proven Tmax T series, this four-pole breaker combines excellent electrical performance with long-term operational reliability.
Equipped with a thermal-magnetic TMA trip unit, the breaker has a 400 A rated current with an adjustable instantaneous magnetic trip setting from 2000 to 4000 A. The fixed four-pole design with front terminal connections and a fully rated neutral makes it suitable for applications requiring complete isolation and protection of three-phase plus neutral circuits.
Designed for demanding industrial environments, the ABB 1SDA054478R1 delivers reliable protection for switchboards, distribution panels, machinery and critical infrastructure while supporting safe and continuous electrical operation.
Key Advantages
- High-quality ABB SACE Tmax T5N moulded case circuit breaker.
- 400 A rated current with thermal-magnetic protection.
- Four-pole fixed configuration with fully rated neutral.
- Front terminal connections for simplified installation.
- Adjustable magnetic trip setting from 2000 to 4000 A.
- Reliable protection for industrial and commercial power distribution.
Key Features
- ABB SACE Tmax T series.
- T5N 400 frame size.
- 400 A rated current.
- Thermal-magnetic TMA trip unit.
- 4-pole fixed circuit breaker.
- Fully rated neutral (100% In).
- Front terminal connections.
- Suitable for industrial low-voltage power distribution.
Reliable Protection for Critical Electrical Systems
The ABB Tmax T5N range has been developed to safeguard low-voltage electrical installations against overloads and short-circuit faults. The thermal element protects conductors during sustained overload conditions, while the magnetic release reacts rapidly to severe fault currents, helping reduce equipment damage and minimise downtime.
Its fully rated neutral and four-pole configuration make the ABB 1SDA054478R1 particularly suitable for commercial buildings, industrial facilities and infrastructure projects where complete isolation of all conductors is required.
Typical Applications
- Industrial switchboards.
- Main and sub-distribution panels.
- Commercial electrical installations.
- Manufacturing facilities.
- Infrastructure and utilities.
- Three-phase distribution systems with neutral protection.
Technical Specifications
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| Current | 400 A | |
|---|---|---|
| Phase | Three Phase | |
| Poles | 4-pole | |
| Device Type | MCCB | |
| Breaking Capacity | 36 kA | |
| Trip Unit | Thermal-magnetic | |
| Manufacturer | ABB | |
| Series | SACE Tmax T | |
| Model | T5N 400 TMA 400-4000 4p F F InN=100%In | |
| Product ID | 1SDA054478R1 | |
| Product type | Moulded case circuit breaker | |
| Frame size | T5 | |
| Rated uninterrupted current (Iu) | 400 A | |
| Rated current (In) | 400 A | |
| Trip unit | Thermal-magnetic (TMA) | |
| Instantaneous magnetic setting | 2000 to 4000 A | |
| Number of poles | 4P | |
| Neutral rating | 100% rated neutral | |
| Mounting type | Fixed | |
| Terminal connection | Front terminals | |
| Rated operational voltage | Up to 690 V AC / 750 V DC | |
| Rated insulation voltage (Ui) | 1000 V | |
| Rated impulse withstand voltage (Uimp) | 8 kV | |
| Rated ultimate breaking capacity (Icu) | 36 kA at 400 V AC | |
| Protection standard | IEC 60947-2 | |
| Dimensions (H × W × D) | approx. 205 × 186 × 103.5 mm | |
| Weight | approx. 5.7 kg |
Frequently Asked Questions
What is the ABB 1SDA054478R1 used for?
The ABB 1SDA054478R1 provides overload and short-circuit protection for industrial and commercial low-voltage electrical distribution systems.
What is the rated current of this circuit breaker?
This model has a 400 A rated current.
Does this breaker include neutral protection?
Yes. It features a fully rated four-pole configuration with a 100% rated neutral conductor.
What type of trip unit is fitted?
The breaker incorporates a thermal-magnetic TMA trip unit with an adjustable instantaneous magnetic trip setting from 2000 to 4000 A.
Where is this breaker typically installed?
It is commonly installed in switchboards, distribution panels, industrial plants and commercial power distribution systems.
Trusted by Electrical Professionals Worldwide
ABB SACE Tmax moulded case circuit breakers are trusted by panel builders, electrical contractors and industrial engineers worldwide for dependable protection, robust construction and proven long-term performance.
