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1sda054477r1 t5n 400 tma 320-3200 4 pole abb mccb
ABB 1SDA054477R1 T5N 400 TMA 320-3200 four-pole fixed moulded case circuit breaker with front terminals, thermal-magnetic release and fully rated neutral for industrial power distribution.
£2,227.21
Why Choose the ABB 1SDA054477R1 T5N 400 TMA 320-3200 Circuit Breaker?
The ABB 1SDA054477R1 is a robust and reliable SACE Tmax T5N moulded case circuit breaker designed for dependable protection in industrial and commercial power distribution systems. As part of the established ABB Tmax T series, this breaker provides high-performance overload and short-circuit protection for demanding low-voltage electrical installations.
This model features a thermal-magnetic TMA release with a rated current of 320 A and instantaneous protection adjustment from 1600 to 3200 A. Its fixed four-pole design with front terminals makes it suitable for switchboards, distribution panels and applications where neutral protection is required.
With a 400 A frame size, fully rated neutral and rated operational voltage up to 690 V AC, the ABB 1SDA054477R1 is ideal for critical power distribution systems where safety, continuity and reliable circuit protection are essential.
Key Advantages
- Reliable ABB Tmax T5N moulded case circuit breaker for power distribution.
- 320 A rated current with thermal-magnetic protection.
- Four-pole fixed configuration with fully rated neutral.
- Front terminal connections for straightforward panel installation.
- Adjustable instantaneous protection from 1600 to 3200 A.
- Designed for industrial switchboards and commercial distribution systems.
Key Features
- ABB SACE Tmax T series.
- T5N 400 frame size.
- 320 A rated current.
- Thermal-magnetic TMA release.
- 4-pole fixed circuit breaker.
- Fully rated neutral with InN = 100% In.
- Front terminal connection type.
- Rated operational voltage up to 690 V AC.
Reliable Circuit Protection for Low-Voltage Distribution
Moulded case circuit breakers such as the ABB 1SDA054477R1 are used to protect electrical circuits against overload and short-circuit faults. The thermal element provides overload protection, while the magnetic element reacts quickly to high fault currents, helping to reduce damage to cables, switchgear and connected equipment.
The fully rated neutral makes this four-pole breaker particularly suitable for three-phase systems where neutral continuity and protection are important. Its compact Tmax T5 construction allows it to be integrated efficiently into modern low-voltage switchboards and control panels.
Typical Applications
- Industrial low-voltage distribution boards.
- Commercial switchboards and panelboards.
- Main and sub-main circuit protection.
- Feeder protection in three-phase systems.
- Infrastructure and building services installations.
- Electrical systems requiring four-pole isolation and neutral protection.
Technical Specifications
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| Current | 320 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 320-3200 4p F F InN=100%In | |
| Product ID | 1SDA054477R1 | |
| Product type | Moulded case circuit breaker | |
| Frame size | T5 | |
| Rated uninterrupted current (Iu) | 400 A | |
| Rated current (In) | 320 A | |
| Release type | Thermal-magnetic TMA | |
| Instantaneous setting | 1600–3200 A | |
| Number of poles | 4P | |
| Neutral rating | Fully rated neutral, InN = 100% In | |
| Mounting version | Fixed | |
| Terminal connection | Front terminals | |
| Rated operational voltage | 690 V AC / 750 V DC | |
| Rated insulation voltage (Ui) | 1000 V | |
| Rated impulse withstand voltage (Uimp) | 8 kV | |
| Rated ultimate short-circuit breaking capacity | 36 kA at 400 V AC | |
| Standards | IEC 60947-2 | |
| Dimensions (H × W × D) | approx. 205 × 186 × 103.5 mm | |
| Weight | approx. 5.8 kg |
Frequently Asked Questions
What is the ABB 1SDA054477R1 used for?
The ABB 1SDA054477R1 is used for overload and short-circuit protection in industrial and commercial low-voltage power distribution systems.
What is the rated current of this circuit breaker?
This model has a 320 A rated current and belongs to the T5N 400 frame size.
How many poles does the ABB 1SDA054477R1 have?
The breaker has a four-pole configuration with a fully rated neutral, making it suitable for three-phase systems requiring neutral switching and protection.
What type of trip release does this breaker use?
It uses a thermal-magnetic TMA release, providing overload protection and instantaneous short-circuit protection.
Where is this circuit breaker typically installed?
It is typically installed in switchboards, distribution panels and industrial electrical systems requiring reliable MCCB protection.
Trusted by Electrical Professionals Worldwide
ABB SACE Tmax moulded case circuit breakers are trusted by electrical engineers, panel builders and contractors worldwide for dependable protection, robust performance and long service life in low-voltage power distribution systems.
