Why Choose the Mersen M25F30S Fuse Switch Disconnector?
The Mersen M25F30S is a compact 25 A fuse switch disconnector designed to provide reliable switching, electrical isolation and fuse protection within low-voltage industrial control systems. Developed for use with FR10 cylindrical fuse links, it combines manual circuit disconnection with replaceable overcurrent protection in one practical assembly.
Featuring a three-pole 3+0 configuration and a right-hand side-operated mechanism, the M25F30S is particularly suited to electrical panels and machinery enclosures where side operation is required. All three phase conductors can be disconnected simultaneously, creating a clearly defined isolation point for maintenance and servicing.
With a rated current of 25 A, the M25F30S is suitable for smaller machinery, control circuits, auxiliary supplies and industrial distribution applications. When fitted with correctly selected FR10 fuse links, it helps protect cables and connected equipment against overload and short-circuit conditions.
Key Advantages
Combines switching, isolation and fuse protection in one compact device.
25 A rated current for industrial control applications.
Designed for FR10 cylindrical fuse links.
Three-pole 3+0 configuration for three-phase circuits.
Right-hand side operation supports flexible enclosure layouts.
Replaceable fuse links for application-specific protection.
Compact construction for industrial panel installation.
Compact Switching and Fuse Protection
Fuse switch disconnectors combine a mechanical isolation device with replaceable fuse links. The Mersen M25F30S allows three-phase circuits to be manually disconnected while the installed FR10 fuses provide protection against excessive current and short-circuit faults.
Its side-operated arrangement is useful in customised control panels where front access is restricted or where the operating control must be positioned on the side of the enclosure. Fuse links should be selected according to the load characteristics, conductor size and required protection performance.
Typical Applications
Industrial control panels.
OEM machinery and production equipment.
Three-phase auxiliary circuits.
Motor and equipment protection.
Industrial automation systems.
Commercial electrical distribution assemblies.
Technical Specifications
Current
25 A
Manufacturer
Mersen
Model
M25F30S
Product type
Fuse switch disconnector
Rated current
25 A
Number of poles
3
Pole configuration
3+0
Fuse-link type
FR10 cylindrical fuse
Operating position
Right-hand side operated
Protection method
Replaceable fuse links
Switching function
Circuit switching and isolation
Mounting application
Electrical panel / switchboard mounting
Application
Low-voltage electrical systems
Frequently Asked Questions
What is the Mersen M25F30S used for?
The M25F30S is used to switch, isolate and protect low-voltage three-phase circuits in industrial control panels, machinery and electrical distribution assemblies.
What fuse links does the M25F30S accept?
The Mersen M25F30S is designed for FR10 cylindrical fuse links.
What is the current rating of the M25F30S?
The M25F30S has a nominal current rating of 25 A.
How is the M25F30S operated?
This model features a right-hand side-operated mechanism, making it suitable for panels requiring side access to the switch control.
Are fuse links supplied with the M25F30S?
Fuse links are normally selected separately so their current rating and protection characteristics can be matched to the connected circuit.
Trusted by Panel Builders and Machine Manufacturers
Mersen fuse switch disconnectors are used by panel builders, OEM manufacturers and industrial electrical engineers for dependable switching, compact installation and reliable circuit protection in low-voltage control systems.
Current
25 A
Manufacturer
Mersen
Model
M25F30S
Product type
Fuse switch disconnector
Rated current
25 A
Number of poles
3
Pole configuration
3+0
Fuse-link type
FR10 cylindrical fuse
Operating position
Right-hand side operated
Protection method
Replaceable fuse links
Switching function
Circuit switching and isolation
Mounting application
Electrical panel / switchboard mounting
Application
Low-voltage electrical systems
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.
Our service agreements are built to support long term procurement relationships. By working closely with engineering teams and procurement departments, we help streamline purchasing processes while ensuring consistent access to critical components and sourcing support when it matters most.
Priority sourcing and supply support
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Customers supported
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Trusted Manfacturers
● frequently asked questions
Common questions about our products and support
At Led Controls Ltd we help engineers source the right automation and control gear with confidence. below are quick answers to what we are asked most often.
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We supply all leading manfacturers in our industry. we offer next day delivery on most poplour products.
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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...