Why Choose the Mersen HD40 Direct-Mount Disconnect Switch Handle?
The Mersen HD40 is a compact and reliable direct-mount operating handle designed for compatible Mersen UL 508 non-fused disconnect switches rated from 16 to 40 A. It provides a practical manual interface for operating the connected switch in industrial machinery, control panels and electrical distribution equipment.
Developed as part of Mersen’s low-voltage disconnect switch accessory range, the HD40 mounts directly onto the compatible switch mechanism. This direct configuration creates a compact operating arrangement and avoids the need for the extended operating shaft normally used with door-coupled handles.
The HD40 is suitable for new control panel assemblies, original equipment manufacturing and replacement applications. Its genuine Mersen construction helps ensure dependable mechanical operation and compatibility when correctly matched with the specified disconnect switch.
Key Advantages
Designed for compatible Mersen 16–40 A disconnect switches.
Suitable for UL 508 non-fused disconnect switch applications.
Eliminates the need for a separate extended operating shaft.
Suitable for industrial control panels and machinery assemblies.
Genuine Mersen accessory for reliable mechanical compatibility.
Key Features
Mersen low-voltage disconnect switch accessory.
Direct-mounted operating handle.
Compatible switch current range of 16–40 A.
Designed for compatible UL 508 non-fused disconnect switches.
Manual switch operation for isolation and control.
Compact design for space-conscious panel assemblies.
Suitable for new installations and replacement projects.
Mersen product reference L1043405.
Reliable Operation of Low-Voltage Disconnect Switches
Disconnect switches provide a controlled means of isolating machinery and electrical equipment from the incoming power supply. A correctly selected operating handle allows the connected switch to be moved between its operating positions clearly and consistently.
The direct-mount configuration of the Mersen HD40 is particularly suitable where the switch is operated directly from the front of its mechanism. When installed with a compatible Mersen 16–40 A disconnect switch, it provides a compact solution for industrial control and isolation applications.
Typical Applications
Industrial machinery isolation.
Electrical control panels.
Motor control equipment.
Automation cabinets.
Low-voltage distribution equipment.
OEM machinery and panel assemblies.
Replacement of compatible disconnect switch handles.
Technical Specifications
Current
40 A
Manufacturer
Mersen
Model
HD40
Manufacturer reference
L1043405
Product type
Disconnect switch operating handle
Handle type
Direct mount
Compatible current range
16–40 A
Compatible switch type
UL 508 non-fused disconnect switch
Operating method
Manual
Mounting arrangement
Direct mounting to the switch mechanism
Application
Low-voltage switching and electrical isolation
Accessory supplied
Operating handle
Switch included
No
GTIN-12
605340558855
GTIN-14
03605340558852
Frequently Asked Questions
What is the Mersen HD40 used for?
The Mersen HD40 is a direct-mount operating handle used to manually operate a compatible Mersen UL 508 non-fused disconnect switch.
Is the HD40 a complete disconnect switch?
No. The HD40 is an operating handle accessory. The compatible disconnect switch must be selected separately.
What switch ratings are compatible with the Mersen HD40?
The HD40 is designed for compatible Mersen disconnect switches with current ratings from 16 to 40 A.
Does the HD40 require an operating shaft?
The HD40 is designed to mount directly onto the compatible switch mechanism, so a separate extended operating shaft is not normally required.
Where is the Mersen HD40 typically installed?
It is commonly used in industrial control panels, machinery assemblies, automation cabinets and low-voltage electrical distribution equipment.
Trusted by Electrical Panel Builders
Mersen disconnect switch accessories are used by electrical engineers, machinery manufacturers and panel builders to support dependable switching and isolation within industrial electrical systems.
Current
40 A
Manufacturer
Mersen
Model
HD40
Manufacturer reference
L1043405
Product type
Disconnect switch operating handle
Handle type
Direct mount
Compatible current range
16–40 A
Compatible switch type
UL 508 non-fused disconnect switch
Operating method
Manual
Mounting arrangement
Direct mounting to the switch mechanism
Application
Low-voltage switching and electrical isolation
Accessory supplied
Operating handle
Switch included
No
GTIN-12
605340558855
GTIN-14
03605340558852
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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Customers supported
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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...