Standard delivery
£8 ex VAT · free over £200UK parcel delivery is £8 ex VAT, or free on orders over £200 ex VAT.
Heavier items may be charged at a weight-based or pallet rate, shown at checkout.
MERSEN FUSE IEC UL508 Switch 63A 3p M633
Mersen M633 UL508 non-fused 63 A three-pole load break switch with direct screw mounting for motor disconnect and industrial electrical isolation.
£59.84
Why Choose the Mersen M633 UL508 Load Break Switch?
The Mersen M633 is a compact UL508 non-fused load break switch engineered for dependable switching and electrical isolation in industrial machinery, OEM equipment and low-voltage power distribution systems. Rated at 63 A and suitable for operation up to 600 V AC, it provides a reliable solution for motor disconnect, branch circuit switching and line-of-sight isolation applications.
As part of the proven Mersen M-Series UL508 switch range, the M633 combines an exceptionally compact footprint with robust industrial construction. Its direct screw mounting arrangement and compatibility with a wide range of handles, shafts and accessories make it ideal for panel builders and machine manufacturers requiring flexible installation options.
The M633 features a three-pole configuration and is capable of making and breaking loads up to 600 V AC. Its non-fused design allows separate overcurrent protection to be provided while delivering dependable manual switching and positive electrical isolation.
Key Advantages
- Compact UL508 non-fused load break switch.
- 63 A rated current for industrial machinery and distribution systems.
- 600 V AC maximum operating voltage.
- Three-pole configuration for three-phase installations.
- Suitable as a motor disconnect and branch circuit switch.
- Robust construction with multiple mounting options.
Key Features
- Mersen M-Series UL508 switch.
- 63 A rated operational current.
- 600 V AC maximum operating voltage.
- Three-pole non-fused design.
- Direct screw mounting configuration.
- Compatible with DIN rail, base and door-mounted accessories.
- Double-break silver-plated contacts.
- Padlockable using compatible handles and shafts.
Reliable Switching for Industrial Equipment
Load break switches provide a safe 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 installation space is limited.
The Mersen M633 is designed to deliver dependable switching performance while maintaining a compact footprint. Its rugged construction 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.
- Industrial automation and manufacturing systems.
Technical Specifications
Tick the specs you need, then view products that match.
| Current | 63 A | |
|---|---|---|
| Phase | Three Phase | |
| Poles | 3-pole | |
| Device Type | Fuse link | |
| Manufacturer | Mersen | |
| Series | UL508 Switch | |
| Model | M633 | |
| Reference number | D1043191 | |
| EAN | 3605340557442 | |
| Product type | UL508 non-fused load break switch | |
| Rated current | 63 A | |
| Maximum operating voltage | 600 V AC | |
| Number of poles | 3 | |
| Mounting type | Direct screw mounting | |
| Compliance | UL 508, IEC 60947-3, RoHS | |
| Typical weight | Approx. 0.27 kg | |
| HS Code | 85363090 | |
| Country of Manufacture | Finland |
Frequently Asked Questions
What is the Mersen M633 used for?
The M633 is used as a manual load break switch for switching and isolating electrical circuits, including motor disconnect and branch circuit applications.
What is the current rating of the M633?
The Mersen M633 has a rated operational current of 63 A.
Is the M633 a fused switch?
No. The M633 is a non-fused UL508 load break switch. Appropriate overcurrent protection should be provided separately.
What voltage is the M633 designed for?
The switch is designed for operation on systems up to 600 V AC.
How many poles does the M633 have?
The M633 features a three-pole configuration for switching three-phase electrical circuits.
Trusted by Electrical Professionals Worldwide
Mersen UL508 load break switches are trusted by panel builders, OEMs and industrial electricians for dependable switching, compact installation and reliable electrical isolation across a wide range of industrial applications.
