ABB OT Plus OT25G1-3MS25 3-Pole Load Break Switch, 25 A, 690 V, Front Operated with Direct Mounted Handle

The OT25G1-3MS25 from ABB's OT Plus series stands out for its robust G1 frame and direct-mounted handle, offering reliable manual switching in a compact footprint. This 3-pole load break switch is engineered for applications where safety and durability are non-negotiable, providing clear visual isolation and high withstand ratings.

Highlights

• Rated operational current of 25 A at up to 690 V AC, suitable for a wide range of industrial and commercial circuits.
• Front-operated with an ergonomic direct-mounted MS25 handle, enabling effortless switching and clear ON/OFF indication.
• High mechanical endurance of 20,000 operations and electrical durability of 1,500 cycles (AC-23A at 400 V).
• IP65 protection on the front face ensures reliable operation even in dusty or damp environments.
• Complies with IEC 60947-3, guaranteeing performance and safety in load break applications.

In daily use

Installation is straightforward thanks to base mounting and screw terminals that accept conductors from 1.5 to 10 mm² (solid/stranded) or 1.5 to 6 mm² (fine-strand with ferrule). The switch is designed for frequent operation, with a low power loss of just 1.5 W per pole, minimizing heat generation. Its compact dimensions and G1 frame size make it easy to integrate into control panels and distribution boards.

Full specifications

• Product type: Load break switch / disconnector
• Number of poles: 3
• Rated operational current (Ie): 25 A
• Rated operational voltage (Ue): 690 V AC
• Rated insulation voltage (Ui): 750 V
• Rated impulse withstand voltage (Uimp): 8 kV
• Rated short-time withstand current (Icw): 1 kA (1s)
• Rated conditional short-circuit current (Icc): 10 kA (with 25A gG fuse)
• Switch operation type: Front operated
• Handle type: Direct mounted handle (MS25), black
• Mounting type: Base mounting
• Degree of protection (IP): IP20 (terminals), IP65 (front)
• Mechanical durability: 20000 cycles
• Electrical durability: 1500 cycles (AC-23A at 400V)
• Terminal type: Screw terminals
• Main circuit connection capacity (solid/stranded): 1.5 - 10 mm²
• Main circuit connection capacity (fine-strand with ferrule): 1.5 - 6 mm²
• Standards: IEC 60947-3
• Frame size: G1
• Power loss per pole: 1.5 W

Final note

A reliable and compact load break switch that delivers consistent performance for demanding industrial applications.