ABB A1N 125 TMF 63-630 3-Pole MCCB
The ABB A1N 125 TMF 63-630 is a fixed three-pole moulded case circuit breaker from the ABB Formula series, rated at 63A with a thermomagnetic (TMF) release for fixed thermal and magnetic protection settings. Its N-rated short-circuit performance delivers higher fault-current handling than standard C-rated variants, making it well suited to demanding UAE commercial and industrial panels.
Key Features
- 3-pole 63A moulded case circuit breaker with fixed thermomagnetic (TMF) release for dependable overload and short-circuit protection.
- 36kA ultimate breaking capacity (Icu) and 7.5kA service breaking capacity (Ics) at 415V AC, giving strong fault-level headroom for UAE distribution panels.
- N short-circuit performance level for higher-duty applications than standard C-rated breakers.
- Front terminal connection for straightforward installation and wiring access in panel builds.
- Genuine ABB quality — manufacturer tested and rated for 8,500 mechanical operating cycles.
Technical Specifications
| Specification |
Details |
| Brand |
ABB |
| Model |
A1N 125 TMF 63-630 3p F F |
| Product Series |
SACE Formula |
| Poles |
3 |
| Rated Current (In) |
63A |
| Rated Uninterrupted Current (Iu) |
125A |
| Release Type |
TMF (Thermomagnetic, Fixed) |
| Short-Circuit Performance Level |
N |
| Rated Operational Voltage |
550V AC / 250V DC |
| Rated Insulation Voltage (Ui) |
690V |
| Rated Impulse Withstand Voltage (Uimp) |
6kV |
| Breaking Capacity Icu (415V AC) |
36kA |
| Breaking Capacity Ics (415V AC) |
7.5kA |
| Terminal Connection |
Front |
| Mounting |
Fixed |
| Mechanical Durability |
8,500 cycles |
| Electrical Durability |
1,500 cycles |
| Dimensions (W x H x D) |
76.2 x 130 x 60mm |
| Weight |
0.75kg |
Applications
- Main and sub-main protection in higher fault-level distribution boards for commercial buildings
- Motor and feeder circuit protection in industrial panels and switchrooms
- Incoming or outgoing circuit protection for HVAC and mechanical plant rooms
- Distribution board upgrades and MCCB replacements in UAE retrofit projects
FAQ
-
What's the difference between an MCB and an MCCB?
An MCB (miniature circuit breaker) is typically rated up to 100A with a fixed, non-adjustable trip and lower breaking capacity, used for final circuits. An MCCB (moulded case circuit breaker) is built for higher currents and fault levels, and is used for main incomers, sub-mains, and feeder protection where an MCB's rating or breaking capacity would be insufficient.
-
When do I need an MCCB instead of an MCB?
Use an MCCB where the prospective fault current or load current exceeds what an MCB is rated to handle safely — typically at the main incomer or major sub-main level of a commercial or industrial distribution board.
-
Does this MCCB have an adjustable trip setting?
Check the specific trip unit type in the Technical Specifications table above — thermal-magnetic MCCBs may have a fixed or adjustable trip range depending on the model; an electronic trip unit typically offers configurable protection curves.
-
Can I install this myself?
No. MCCBs are installed in distribution boards and panels by a licensed electrician, in line with UAE wiring regulations.
