ABB BMSDW463 4-Pole 63A Switch Disconnector
The BMSDW463 is a 4-pole 63A switch disconnector from ABB's Formula DIN Rail range, used to safely isolate power in distribution boards. Manufactured to IEC standards, it functions as a main switch for distribution boards and is suited to residential, commercial, and light industrial installations across the UAE.
Key Features
- 4-pole switch disconnector for isolating all phases and neutral in a distribution board
- 63A rated current suitable for main incomer isolation in medium-sized distribution boards
- Rated conditional short-circuit current of 6kA for reliable performance under fault conditions
- IP20 degree of protection with an operating temperature range of -25ยฐC to +55ยฐC, suited to UAE ambient conditions
- Genuine ABB Formula Din Rail quality โ rated for 10,000 electrical and mechanical operating cycles
Technical Specifications
| Specification |
Details |
| Brand |
ABB |
| Model |
BMSDW463 |
| Type |
Switch Disconnector (Isolator) |
| Poles |
4 |
| Rated Current (In) |
63A |
| Rated Impulse Withstand Voltage (Uimp) |
4kV |
| Rated Conditional Short-Circuit Current (Inc) |
6kA |
| Rated Frequency |
50/60Hz |
| Degree of Protection |
IP20 |
| Pollution Degree |
2 |
| Mounting |
DIN Rail |
| Connecting Capacity |
Flexible 35mmยฒ / Solid 25mmยฒ |
| Electrical & Mechanical Endurance |
10,000 cycles |
| Ambient Operating Temperature |
-25ยฐC to +55ยฐC |
Applications
- Main switch isolation for three-phase distribution boards in villas and commercial buildings
- Safe isolation point for maintenance and servicing of sub-distribution boards
- Isolation of HVAC, pump, and motor circuits before maintenance work in FM-managed facilities
- General power isolation in retail, warehouse, and light industrial panels across the UAE
FAQ
-
Is this an MCB or an isolator?
It's an isolator (switch-disconnector), not an MCB. It has no overload or short-circuit protection โ it only provides a manual on/off disconnect, and should be paired with separate MCBs or RCCBs for circuit protection.
-
What does 4-pole mean for this isolator?
4-pole means it switches all three phases plus neutral, for supplies where the neutral must also be isolated.
-
Where should this isolator be installed?
Typically as the main incoming switch or a local isolation point ahead of the MCBs/RCCBs in a distribution board, so the whole board (or a section of it) can be isolated for maintenance without needing to trip individual breakers.
-
Can I install this myself?
No. This is trade-only distribution board equipment and must be installed and connected by a licensed electrician in accordance with local wiring regulations.
-
Can this isolator be used to switch a live circuit under load?
Isolators rated for on-load switching can do this within their utilisation category, but check the specific AC rating in the Technical Specifications table โ an isolator is not a protective device and should not substitute for a circuit breaker.
