OT40M4 ABB 40 A 4-Pole DIN-Rail Switch-Disconnector

Why Choose the ABB OT40M4 40 A 4-Pole Switch-Disconnector?

The ABB OT40M4 is a compact 40 A, 4-pole switch-disconnector designed specifically for installation in electrical distribution boards. Its modular construction is suitable for standard 45 mm distribution-board openings, making it a practical choice for local switching and isolation where installation space is limited.

The OT40M4 is front operated and can be installed using DIN-rail or base mounting. Protected clamp terminals provide an IP20 front protection level, while its four simultaneously switched poles allow four conductors to be isolated together in suitable low-voltage electrical systems.

This model is supplied without a handle and shaft, so suitable operating accessories must be selected separately where required. The OT40M4 has been superseded by ABB OT40G1-4MSN2, making the newer model the replacement to consider for new installations while OT40M4 remains relevant for identification, maintenance and replacement of existing equipment.

Key Advantages

• Compact 40 A switch-disconnector for distribution-board applications.
• 4-pole configuration for simultaneous switching and isolation of four conductors.
• Suitable for distribution boards with a standard 45 mm opening.
• DIN-rail mountable for convenient modular installation.
• Can also be installed using base mounting.
• Front-operated design for accessible manual switching.
• Protected clamp terminals provide IP20 front protection.
• Compact modular format with a width of approximately 68 mm.

Key Features

• ABB OT modular switch-disconnector.
• 40 A conventional free-air thermal current.
• 4-pole switching configuration.
• 40 A AC-21A / 40 A AC-22A / 23 A AC-23A at up to 415 V AC.
• 11 kW AC-23 switching power at 400 V AC.
• Front-operated construction.
• DIN-rail and base mounting capability.
• Suitable for 45 mm distribution-board slots.
• Protected clamp terminals.
• 0.75–10 mm² copper conductor capacity.
• Handle and shaft not included.
• OT40G1-4MSN2 is the superseding ABB model.

Compact Isolation for DIN-Rail Distribution Boards

The ABB OT40M4 provides a compact means of manually switching and isolating electrical circuits within distribution boards and similar assemblies. Its 40 A rating, four simultaneously switched poles and DIN-rail mounting capability make it particularly suitable where a conventional industrial switch-disconnector would occupy unnecessary panel space.

The OT40M4 is designed around the standard 45 mm distribution-board opening and uses protected terminals for safer integration into suitable assemblies. For new projects, ABB has superseded this model with the OT40G1-4MSN2 40 A 4-pole modular switch-disconnector; the original OT40M4 remains important when maintaining or identifying existing installations.

Typical Applications

• DIN-rail electrical distribution boards.
• Commercial and industrial distribution systems.
• Four-pole circuit isolation.
• Electrical control panels.
• Machinery electrical systems.
• Local maintenance isolation.
• Existing installations requiring identification or replacement of an ABB OT40M4.