Why Choose the Mersen M403 UL508 Load Break Switch?
The Mersen M403 is a compact and robust UL508 non-fused load break switch designed to provide dependable switching and electrical isolation for industrial machinery and low-voltage power distribution systems. Rated at 40 A and 600 V AC, it is ideal for use as a motor disconnect, branch circuit switch or line-of-sight isolator in commercial and industrial installations.
As part of the proven Mersen M-Series UL508 switch range, the M403 combines a compact footprint with rugged construction and high switching performance. Its direct screw mounting arrangement and broad selection of compatible handles and shafts provide flexibility for panel builders, OEMs and electrical contractors.
The M403 features a three-pole configuration and is capable of making and breaking loads up to 600 V AC. Its non-fused design makes it suitable where circuit protection is provided separately by fuses or circuit breakers, allowing the switch to focus on safe manual switching and reliable electrical isolation.
Key Advantages
- Compact UL508 non-fused load break switch.
- 40 A rated current for industrial applications.
- 600 V AC maximum operating voltage.
- Three-pole configuration for three-phase systems.
- Suitable as a motor disconnect and branch circuit switch.
- Robust industrial construction with multiple mounting options.
Key Features
- Mersen M-Series UL508 switch.
- 40 A rated operational current.
- 600 V AC maximum operating voltage.
- Three-pole non-fused design.
- Direct screw mounting configuration.
- Suitable for DIN rail, base or door-mounted installations with compatible accessories.
- Double-break silver-plated contacts.
- Padlockable with optional handles and shafts.
Reliable Switching for Industrial Equipment
Load break switches provide a safe and dependable means of manually disconnecting electrical equipment for maintenance, servicing and emergency isolation. Their compact construction makes them particularly suitable for machinery control panels and industrial electrical assemblies where space is limited.
The Mersen M403 is engineered for reliable switching performance while maintaining a compact footprint. Its robust design and flexible mounting options make it suitable for OEM machinery, industrial automation systems and commercial electrical installations.
Typical Applications
- Motor disconnect switches.
- Industrial machinery.
- OEM control panels.
- Branch circuit switching.
- Electrical isolation within switchboards.
- Commercial and industrial power distribution.
