ABB ot125f4c 125 amp 4 pole change-over switch

Why Choose the ABB OT125F4C Change-Over Switch?

The ABB OT125F4C is a robust and reliable 4-pole manual change-over switch designed for safe transfer switching between two low voltage power sources. Identified by ABB Product ID 1SCA105054R1001, it forms part of the trusted ABB OT Series and is widely used in industrial panels, generator changeover systems, distribution boards and machinery applications.

This 125 A open transition change-over switch allows a load to be manually transferred between two supplies while providing a stable OFF position. Its compact construction, front operated design and non-fusible switching arrangement make it suitable for demanding industrial environments where dependable source selection and safe isolation are essential.

With a 125 A current rating, 4-pole configuration and suitability for DIN rail or panel mounting, the OT125F4C is ideal for three-phase systems requiring neutral switching alongside phase changeover. The operating handle and shaft are ordered separately, allowing the installation to be configured to suit the enclosure depth and panel layout.

Key Advantages

• Reliable 4-pole manual change-over switch for industrial power transfer.
• 125 A rated operational current for low voltage applications.
• Open transition switching with stable OFF position.
• Suitable for DIN rail or panel mounting.
• Ideal for three-phase systems requiring neutral switching.
• Compatible with ABB handles, shafts and accessories for flexible installation.

Key Features

• ABB OT Series change-over switch.
• 4-pole configuration.
• 125 A rated current.
• Manual transfer switch for source selection applications.
• Open I-O-II transition with stable OFF position.
• DIN rail and panel mountable design.
• Suitable for mains, generator and standby supply switching.
• Handle and shaft supplied separately for installation flexibility.

Technical Specifications

• Manufacturer: ABB
• Series: OT Change-Over Switches
• Model: OT125F4C
• Product ID: 1SCA105054R1001
• EAN: 6417019391847
• Product type: Manual change-over switch / non-fusible transfer switch
• Rated operational current: 125 A
• Number of poles: 4
• Rated operational voltage: Up to 600 V AC
• Switching AC voltage: Up to 690 V AC
• Transition type: Open transition
• Switch positions: I-O-II with stable OFF position
• Operation: Manual front operation
• Mounting type: DIN rail / panel mounting
• Protection rating: IP20
• Standards: IEC 60947-3 / UL 98
• Handle and shaft: Not included
• Dimensions (H × W × D): approx. 100 × 193 × 86 mm

Reliable Manual Transfer Switching for Low Voltage Systems

Change-over switches such as the ABB OT125F4C provide a dependable method of manually transferring electrical loads between two power sources. This is commonly required where a main supply and an alternative supply, such as a generator or standby feed, must be selected safely and clearly.

The OT125F4C uses open transition operation, meaning the first supply is disconnected before the second supply is connected. This helps prevent source overlap and supports safe manual transfer switching in industrial and commercial low voltage power systems.

Typical Applications

• Generator changeover panels.
• Main and standby power supply selection.
• Industrial distribution boards.
• Control panels and switchboards.
• Three-phase systems requiring neutral switching.
• Low voltage power distribution systems.

Trusted by Panel Builders Worldwide

ABB OT Series change-over switches are widely used by electrical engineers, generator panel builders and industrial installers to provide reliable manual transfer switching, safe source selection and dependable performance in low voltage power systems.