ABB SH203M-C63 MCB 63A 3-Pole 10kA Type C

ABB SH203M-C63 3-Pole Miniature Circuit Breaker – 63 A, 10 kA

ABB’s three‑pole miniature circuit breaker (MCB) SH203M-C63 delivers reliable protection for three‑phase distribution circuits with a 63 A rating and a 10 kA breaking capacity. Designed for versatile use in UAE installations, it combines ABB reliability with straightforward installation and clear trip indication.

Key Features

• Three-pole (3P) configuration for three-phase distribution protection
• Rated current: 63 A with 10 kA breaking capacity at 230/400 V AC
• Type C tripping curve for general-purpose protection
• Dual trip mechanism: delayed thermal (overload) and electromagnetic (short-circuit)
• Complies with IEC/EN 60898-1
• DIN-rail mounting, suitable for installation in any position

• Three-pole miniature circuit breaker for three-phase protection
• Current rating: 63 A
• Breaking capacity: 10 kA
• Type: Standard
• Model/Part: SH203M-C63 (2CDS273011R0634)
• Manufacturer: ABB

Technical specifications

Applications

• Three‑phase distribution in commercial and residential UAE projects
• Protection for MCCBs and main distribution boards in UAE contractors’ installs
• Suitable for standard circuit protection where reliable trip performance is required

FAQ

• What's the difference between an MCB and an RCCB/RCD?
  An MCB (miniature circuit breaker) protects wiring and connected equipment against overload and short-circuit current. An RCCB/RCD protects against earth leakage by monitoring current imbalance. The two are complementary and are normally installed together in a distribution board.
• What does the Type C tripping curve mean?
  Type C trips at 5–10x rated current, giving enough headroom for motors, transformers, and ballast/LED-driver inrush without nuisance tripping.
• What does the 10kA breaking capacity mean?
  10kA is the maximum fault current this MCB can safely interrupt without damage. It should be equal to or higher than the prospective fault current at its installation point in the board.
• How many poles do I need?
  A 3-pole (3P) breaker switches all three phases on a three-phase circuit without a switched neutral.
• Is this MCB compatible with other ABB DIN-rail distribution boards?
  Yes — it's a standard DIN-rail (EN 60715) mounted breaker and clips directly into ABB's modular consumer units and distribution boards alongside other ABB DIN-rail devices.
• Can I install this myself?
  No. This is a distribution board component and must be installed and connected by a licensed electrician in accordance with UAE wiring regulations — it is not a DIY consumer product.