Mersen Class J Time-Delay Fuse...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$109.11
$59.11

Mersen Class J Time-Delay Fuse 20A 600VAC/400VDC with SmartSpot Indication System

(No reviews yet) Write a Review

Model: AJT20

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

$109.11
$59.11
Adding to cart… The item has been added
Free Shipping on orders over $99
We price match and offer bulk discounts! Click Add to Quote. It's quick and easy.
Earn points with this purchase! You can redeem points for giftcards, iPads, XBox's and more. View Rewards
Free Keying on all locks

Mersen Class J Time-Delay Fuse 20A 600VAC/400VDC with SmartSpot Indication System

Professional Circuit Protection with Visual Indication Technology

The Mersen Class J Time-Delay Fuse delivers reliable circuit protection with 20A rating for both AC and DC applications. Featuring 600VAC/400VDC voltage capability and SmartSpot indication system, this professional-grade fuse provides visual status monitoring for enhanced safety and maintenance efficiency. The ferrule terminal design with tin-plated copper connections ensures secure installation and optimal conductivity.

Professional Features & Benefits

  • 20A Current Rating: Provides precise overcurrent protection for medium-duty electrical circuits and equipment.
  • 600VAC/400VDC Dual Voltage: Versatile voltage compatibility supports both AC and DC applications in diverse electrical systems.
  • 200 kA Breaking Capacity: High interrupting rating ensures safe fault current interruption in demanding electrical environments.
  • SmartSpot Indication System: Visual indication technology provides immediate fuse status identification for faster troubleshooting and maintenance.
  • Time-Delay Characteristic: Allows temporary overloads while providing protection against sustained overcurrent conditions.
  • Class J Design: Current-limiting construction reduces let-through energy and protects downstream components from damage.
  • Ferrule Terminal Construction: Tin-plated copper terminals ensure reliable connections and resist corrosion in industrial environments.

Technical Specifications

  • Ac Max I R Breaking Capacity I1: 200 kA
  • Ac Or Dc: AC/DC
  • Ampere Rating: 20 A
  • Body Insulating Material: GMG
  • Connection Terminal Material: Tin-Plated Copper
  • Connection Terminal Type: Ferrule
  • Frequency Hz : 50/60 Hz
  • Fuse Class: Class J
  • Indication System: Yes
  • Indication System Type: SmartSpot�
  • Mounting Method: Clip
  • Product Length: 2.25 in
  • Product Weight: 0.097 lb
  • Rated Voltage Ac Ul: 600 V
  • Rated Voltage Dc Ul: 400 V
  • Rohs Compliant: Yes
  • Speed Characteristic: Time Delay

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 Motor Control Centers
  • Commercial Electrical Panels
  • HVAC Equipment Protection
  • Manufacturing Equipment Circuits
  • Power Distribution Systems
  • Renewable Energy Applications
  • Emergency Power Systems

Why Choose Mersen Quality?

Mersen fuses deliver proven reliability with RoHS compliant construction and professional-grade materials. The GMG insulating material and precision engineering ensure consistent performance in demanding electrical applications, while the compact 2.25-inch length and lightweight 0.097 lb design facilitate easy installation and maintenance.

Manufacturer Resources

Product Specs

Ac Max I R Breaking Capacity I1:
200 kA
Ac Or Dc:
AC/DC
Ampere Rating:
20 A
Body Insulating Material:
GMG
Connection Terminal Material:
Tin-Plated Copper
Connection Terminal Type:
Ferrule
Frequency Hz :
50/60 Hz
Fuse Class:
Class J
Indication System:
Yes
Indication System Type:
SmartSpot®
Mounting Method:
Clip
Product Length:
2.25 in
Product Weight:
0.097 lb
Rated Voltage Ac Ul:
600 V
Rated Voltage Dc Ul:
400 V
Rohs Compliant:
Yes
Speed Characteristic:
Time Delay

Mersen AJT20 – Frequently Asked Questions

How fast can I get the Mersen AJT20 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 AJT20 come with a warranty?
Absolutely. The Mersen AJT20 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 AJT20?
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 AJT20 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.