Why Choose the Mersen B223009 NH3 Microswitch Accessory?
The Mersen B223009 is a dedicated microswitch accessory designed for compatible NH size 3 fuse bases. It enables remote indication of fuse operation when used with compatible NH fuse links incorporating a striker, making it ideal for industrial power distribution systems where fuse status monitoring is required.
Manufactured as part of the proven Mersen NH fuse system, the B223009 is intended for installation on compatible NH3 fuse bases and provides a simple means of integrating blown-fuse signalling into control circuits, PLCs and alarm systems.
The microswitch operates when the associated striker fuse link actuates or when no fuse link is installed, providing dependable signalling for maintenance personnel and reducing downtime in critical electrical installations.
Key Advantages
Designed specifically for compatible NH3 fuse bases.
Provides remote blown-fuse indication.
Suitable for industrial monitoring and control systems.
Simple installation on compatible Mersen NH fuse bases.
Supports preventative maintenance and faster fault diagnosis.
Manufactured to complement the Mersen NH fuse-holder range.
Key Features
Mersen NH fuse system accessory.
Microswitch for compatible NH3 fuse bases.
Compatible with striker-type NH fuse links.
Operates when the fuse link actuates.
Also operates when no fuse link is installed.
Suitable for signalling and monitoring circuits.
Compact construction.
Industrial-grade design.
Reliable Fuse Monitoring for Industrial Installations
Electrical distribution systems often require remote indication when a fuse has operated. The Mersen B223009 microswitch enables compatible NH fuse bases to provide a signalling output that can be connected to PLCs, alarms or supervisory control systems, improving maintenance response and reducing machine downtime.
When combined with compatible NH fuse bases and striker-type fuse links, the microswitch provides dependable status indication for industrial switchboards, motor control centres and power distribution equipment.
Typical Applications
Industrial switchboards.
Motor control centres.
Low voltage power distribution.
PLC monitoring systems.
Renewable energy installations.
Electrical control panels.
Industrial maintenance systems.
Technical Specifications
Manufacturer
Mersen
Model
B223009
Product type
Microswitch accessory
Compatible fuse size
NH3
Compatible product
NH3 fuse bases
Application
Blown fuse indication
Switch function
Operates with striker fuse links or without fuse installed
Auxiliary contact rating
250 V AC, 10 A
Terminal size
6.3 × 0.8 mm
Installation
Compatible NH3 fuse bases
EAN
8430399014548
RoHS compliant
Yes
Frequently Asked Questions
What is the Mersen B223009 used for?
The B223009 is a microswitch accessory that provides remote indication of fuse operation when installed on compatible NH3 fuse bases.
Which fuse bases is it compatible with?
It is designed for compatible Mersen NH size 3 fuse bases.
Does it work with standard NH fuse links?
It is intended for use with striker-type NH fuse links, allowing remote indication when the fuse operates.
What is the auxiliary switch rating?
The microswitch is rated at 250 V AC, 10 A with 6.3 × 0.8 mm terminals.
Can it be connected to a PLC?
Yes. The microswitch is commonly used for PLC inputs, alarm systems and remote fuse monitoring circuits.
Trusted for Industrial Power Distribution
Mersen NH fuse accessories are trusted by panel builders, OEMs and maintenance engineers for dependable protection, monitoring and control of industrial electrical distribution systems.
Manufacturer
Mersen
Model
B223009
Product type
Microswitch accessory
Compatible fuse size
NH3
Compatible product
NH3 fuse bases
Application
Blown fuse indication
Switch function
Operates with striker fuse links or without fuse installed
Auxiliary contact rating
250 V AC, 10 A
Terminal size
6.3 × 0.8 mm
Installation
Compatible NH3 fuse bases
EAN
8430399014548
RoHS compliant
Yes
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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Support for engineering, maintenance, and operations
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Stock lines ready to ship
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Same day dispatches
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Customers supported
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Trusted Manfacturers
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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...