Mersen Class K5 Fast-Acting Fu...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$59.83
$9.83
Mersen Class K5 Fast-Acting Fuse 40A 250VAC/250VDC Ferrule Terminal

Mersen Class K5 Fast-Acting Fuse 40A 250VAC/250VDC Ferrule Terminal

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Model: OT40

In Stock (leaves warehouse same day if ordered before 3pm ET)

$59.83
$9.83
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Mersen Class K5 Fast-Acting Fuse 40A 250VAC/250VDC Ferrule Terminal

Professional overcurrent protection with fast-acting response

The Mersen Class K5 Fast-Acting Fuse delivers reliable overcurrent protection for 40A circuits operating at 250VAC or 250VDC. This professional-grade fuse features ferrule terminals for secure connections and fast-acting characteristics for rapid circuit protection. With 50 kA breaking capacity and paper body insulation, this fuse provides dependable performance in demanding electrical applications.

Professional Features & Benefits

  • 40A Current Rating: Provides precise overcurrent protection for medium-duty electrical circuits and equipment.
  • 250VAC/250VDC Dual Voltage: Versatile operation across both AC and DC applications for flexible installation options.
  • Class K5 Design: Meets professional electrical standards for reliable performance and code compliance.
  • Fast-Acting Response: Rapid circuit interruption protects sensitive equipment from overcurrent damage.
  • 50 kA Breaking Capacity: High fault current interruption capability for robust electrical system protection.
  • Ferrule Terminals: Secure copper terminal connections ensure reliable electrical contact and easy installation.
  • Clip Mounting: Simple installation method reduces labor time and ensures proper fuse positioning.

Technical Specifications

  • Ac Max I R Breaking Capacity I1: 50 kA
  • Ac Or Dc: AC/DC
  • Ampere Rating: 40 A
  • Body Insulating Material: Paper
  • Connection Terminal Material: Copper
  • Connection Terminal Type: Ferrule
  • Frequency Hz : 50/60 Hz
  • Fuse Class: Class K5
  • Mounting Method: Clip
  • Product Length: 3 in
  • Product Weight: 0.073 lb
  • Rated Voltage Ac Ul: 250 V
  • Rated Voltage Dc Ul: 250 V
  • Rohs Compliant: Yes
  • Speed Characteristic: Fast-Acting

Installation & Operation

  1. Mount the unit in a suitable location with appropriate clearance and access for connections and service.
  2. Connect utility and load conductors following applicable guidelines and the manufacturer's instructions.
  3. Wire generator or power input according to the provided voltage/phase specifications and compatible capacity.
  4. Configure any available load management or control features as supported by the provided specifications.
  5. Test automatic transfer or operational functionality and verify proper performance before placing into service.
  6. Complete final inspection and follow ongoing maintenance practices appropriate to the product category.

Professional Applications

  • Industrial Control Panels
  • Motor Control Centers
  • Power Distribution Equipment
  • Commercial Electrical Systems
  • Manufacturing Facilities
  • Process Control Applications
  • Electrical Maintenance Operations

Why Choose Mersen Quality?

Mersen fuses deliver professional-grade overcurrent protection with RoHS compliance and proven reliability. The copper ferrule terminals and paper body insulation provide durable construction for long-term electrical system protection and dependable performance in critical applications.

Manufacturer Resources

Product Specs

Ac Max I R Breaking Capacity I1:
50 kA
Ac Or Dc:
AC/DC
Ampere Rating:
40 A
Body Insulating Material:
Paper
Connection Terminal Material:
Copper
Connection Terminal Type:
Ferrule
Frequency Hz :
50/60 Hz
Fuse Class:
Class K5
Mounting Method:
Clip
Product Length:
3 in
Product Weight:
0.073 lb
Rated Voltage Ac Ul:
250 V
Rated Voltage Dc Ul:
250 V
Rohs Compliant:
Yes
Speed Characteristic:
Fast-Acting

Mersen OT40 – Frequently Asked Questions

How fast can I get the Mersen OT40 delivered?
Most orders ship the same day from our distribution partners, with quick delivery throughout the continental U.S. Need it urgently? Contact Us for expedited shipping options.
Can I return it if it doesn’t work for me?
Yes—ZenSupply offers a hassle-free return policy. If the product isn’t the right fit, reach out to our support team for a return authorization or setup a return by following our return instructions.
Does the Mersen OT40 come with a warranty?
Absolutely. The Mersen OT40 is backed by a manufacturer’s warranty. For full warranty terms, check the product documentation or Contact Us.
How do I get technical support or installation help for the Mersen OT40?
You can call, text, or email our expert support team for fast answers. We’re here to help with product selection, installation tips, and troubleshooting. Contact Us
Why buy the Mersen OT40 from ZenSupply?
ZenSupply makes it easy to get the commercial door hardware you need—fast shipping, expert support, and rewards on every order. Our team is always ready to help you choose the right product for your project.
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