Why Choose the Mersen M50F30S Side-Operated Fused Switch Disconnector?
The Mersen M50F30S is a compact IEC fused switch disconnector designed to provide dependable switching, electrical isolation and fuse-based overcurrent protection for industrial low-voltage electrical systems. Rated at 50 A, it is ideal for machinery, OEM control panels and power distribution applications requiring reliable operation and safe maintenance isolation.
Featuring a right-side-operated mechanism, the M50F30S offers increased flexibility when designing switchboards and electrical enclosures. The side-operated arrangement is particularly useful where front-mounted operating mechanisms are impractical due to enclosure layout or internal component positioning.
Designed for use with FR14 cylindrical fuse links, the M50F30S combines manual load switching, secure circuit isolation and fuse protection within a single compact assembly. Its three-pole configuration makes it suitable for switching and protecting three-phase electrical circuits in demanding industrial environments.
Key Advantages
Combines switching, isolation and fuse protection in one compact assembly.
50 A rated current for industrial and OEM applications.
Right-side-operated design for flexible enclosure layouts.
Designed for FR14 cylindrical fuse links.
Three-pole configuration for three-phase systems.
Robust construction for demanding industrial environments.
Key Features
Mersen IEC fused switch disconnector.
50 A rated operational current.
Three-pole fused switching arrangement.
Right-side-operated mechanism.
Compatible with FR14 cylindrical fuse links.
Manual load switching and secure electrical isolation.
Fuse-based overload and short-circuit protection.
Suitable for panel and switchboard installation.
Reliable Side-Operated Circuit Protection
Side-operated fused switch disconnectors provide a practical solution where enclosure design or equipment layout requires the operating handle to be positioned on the side of the switch assembly. This allows greater flexibility during panel construction while maintaining straightforward operation and safe circuit isolation.
The Mersen M50F30S accommodates suitable FR14 fuse links, enabling reliable protection against overload and short-circuit faults while providing a clearly defined isolation point for servicing and maintenance. Its compact design makes it particularly suitable for modern industrial control panels and machinery.
Typical Applications
Industrial machinery control panels.
Motor feeder circuits.
OEM electrical equipment.
Low-voltage distribution panels.
Manufacturing and automation systems.
Commercial and industrial electrical installations.
Technical Specifications
Current
50 A
Manufacturer
Mersen
Model
M50F30S
Reference number
L1043267
Product type
IEC fused switch disconnector
Rated current
50 A
Number of poles
3
Fuse format
FR14 cylindrical fuse links
Operating mechanism
Right-side operated
Primary function
Switching, isolation and overcurrent protection
Mounting application
Panel / switchboard installation
Weight
Approx. 1.2 kg
Package quantity
1
Frequently Asked Questions
What is the Mersen M50F30S used for?
The M50F30S is used to switch, isolate and protect three-phase electrical circuits within industrial machinery and low-voltage power distribution systems.
What is the current rating of the M50F30S?
The Mersen M50F30S has a rated operational current of 50 A.
Which fuse type does the M50F30S use?
The switch is designed to accommodate FR14 cylindrical fuse links, allowing appropriate fuse ratings to be selected for the application.
How is the M50F30S operated?
The M50F30S features a right-side-operated mechanism, making it suitable for switchboards and enclosures requiring side-mounted operation.
How many poles does the M50F30S have?
The switch has a three-pole configuration for simultaneous switching and protection of three-phase electrical circuits.
Trusted by Panel Builders and Electrical Engineers
Mersen fused switch disconnectors are trusted worldwide by panel builders, OEMs and industrial electrical engineers for dependable switching, secure electrical isolation and reliable fuse protection in demanding low-voltage applications.
Current
50 A
Manufacturer
Mersen
Model
M50F30S
Reference number
L1043267
Product type
IEC fused switch disconnector
Rated current
50 A
Number of poles
3
Fuse format
FR14 cylindrical fuse links
Operating mechanism
Right-side operated
Primary function
Switching, isolation and overcurrent protection
Mounting application
Panel / switchboard installation
Weight
Approx. 1.2 kg
Package quantity
1
No documents available for this product.
Delivery
We offer fast UK delivery on all stocked items. Orders placed before 3pm Monday to Friday are eligible for next-day delivery.
Standard delivery: 2–3 working days
Next-day delivery: available on in-stock items when ordered before 3pm
Express options available — contact us for details
Returns
If you need to return an item, please contact our sales team within 30 days of receipt. Items must be returned unused in their original packaging.
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LED Controls is a specialist distributor of factory automation and industrial controls, supplying OEMs, machine builders, panel builders and end users throughout the UK and worldwide. As a trusted UK distributor for many of the world’s leading automation manufacturers, we provide industrial control products, technical expertise and bespoke automation solutions backed by outstanding customer service.
2025 has been a big year for LED Controls, and our blog has expanded accordingly. We've covered a wide range of topics across industrial control and factory automation this year. From core technology explainers and new product releases to panel building best practice...
2025 has been a big year for LED Controls, and our blog has expanded accordingly. We've covered a wide range of topics across industrial control and factory automation this year. From core technology explainers and new product releases to panel building best practice...