ABB OT125F3 Switch-Disconnector 1SCA105033R1001 ABB
ABB OT125F3 Switch-Disconnector 1SCA105033R1001 ABB
ABB OT125F3 Switch-Disconnector 1SCA105033R1001 ABB
ABB OT125F3 Switch-Disconnector 1SCA105033R1001 ABB

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ABB

ABB OT125F3 Switch-Disconnector 1SCA105033R1001

SKU: OT125F3
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AED 225.00 inc. VAT
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ABB OT125F3 3-Pole 125A Switch Disconnector

The OT125F3 is a 3-pole, front-operated switch disconnector rated at 125A, suitable for both base and DIN-rail mounting. Built with front-protected clamp terminals for safe installation, it provides reliable local isolation for distribution circuits and machinery in commercial and industrial panel builds across the UAE.

Key Features

  • 3-pole switch disconnector rated up to 125A (AC-21A) for flexible use across single and three-phase circuits
  • Front-protected clamp terminals accepting cable cross-sections from 10 to 70 mm² for secure, safe wiring
  • Mechanical durability of 20,000 operating cycles for long-term reliability in frequent-switching applications
  • Compact base/DIN-rail mounting design suited to space-constrained distribution boards and enclosures
  • Genuine ABB quality — manufactured in Finland to IEC 60947-3 standards

Technical Specifications

Specification Details
Brand ABB
Model OT125F3
Number of Poles 3P
Rated Operational Current (Ie) AC-21A 125A (380–690V)
Rated Operational Current (Ie) AC-23A 90A (380–415V)
Rated Operational Voltage 750V (main circuit)
Rated Insulation Voltage (Ui) 750V
Rated Impulse Withstand Voltage (Uimp) 8kV
Rated Short-Circuit Making Capacity (Icm) 3.6kA at 690V
Rated Short-Time Withstand Current (Icw) 2.5kA for 1s
Rated Conditional Short-Circuit Current 50kA (125A fuse, 415V)
Degree of Protection Front IP20
Mounting Type Base mounting / DIN-rail
Operating Mode Front operated
Terminal Type Screw terminals
Cable Cross-Section Cu 10 – 70 mm²
Tightening Torque 6 N·m (acc. IEC 60947-1)
Mechanical Durability 20,000 operations
Standards IEC 60947-3
Net Weight 0.36 kg
Dimensions (W x H x D) 70 x 100 x 74 mm
Note Handle and shaft not included

Applications

  • Main or local isolation in low voltage distribution boards
  • Load-break switching for motor and feeder circuits in commercial buildings
  • Isolation switching in compact industrial panel builds and switchboards
  • Safe isolation point for maintenance in FM-managed facilities 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 — it only provides a manual on/off disconnect, and should be paired with separate MCBs or RCCBs for circuit protection.
  • 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 — an isolator is not a protective device and should not substitute for a circuit breaker.

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