Mersen Class L Time-Delay Fuse...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$1,745.03
$1,695.03

Mersen Class L Time-Delay Fuse 1200A 600VAC/300VDC Blade Terminal Amp-Trap

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Model: A4BY1200

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

$1,745.03
$1,695.03
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Mersen Class L Time-Delay Fuse 1200A 600VAC/300VDC Blade Terminal Amp-Trap

Professional High-Amperage Circuit Protection with Time-Delay Characteristics

The Mersen Class L Time-Delay Fuse delivers reliable circuit protection for high-amperage applications requiring 1200A capacity. Engineered for dual voltage operation at 600VAC and 300VDC, this blade terminal fuse features GMG body insulating material and silver-plated copper terminals for superior conductivity and durability. The time-delay characteristic provides motor starting capability while maintaining fast fault clearing performance.

Professional Features & Benefits

  • 1200A Ampere Rating: Handles high-current applications with reliable overcurrent protection for demanding electrical systems.
  • Class L Design: Meets stringent industry standards for current-limiting performance and arc fault protection in commercial and industrial installations.
  • Time-Delay Characteristic: Allows temporary overloads during motor starting while providing fast response to fault conditions.
  • Dual Voltage Rating: Supports both 600VAC and 300VDC applications for versatile installation flexibility.
  • 200kA Breaking Capacity: Provides exceptional fault current interruption capability for high-energy electrical systems.
  • Silver-Plated Copper Terminals: Ensures optimal electrical conductivity and corrosion resistance for long-term reliability.
  • Blade Terminal Design: Facilitates secure bolted mounting and reliable electrical connections in switchgear applications.

Technical Specifications

  • Ac Max I R Breaking Capacity I1: 200 kA
  • Ac Or Dc: AC/DC
  • Ampere Rating: 1200 A
  • Body Insulating Material: GMG
  • Connection Terminal Material: Silver-Plated Copper
  • Connection Terminal Type: Blade
  • Frequency Hz : 50/60 Hz
  • Fuse Class: Class L
  • Mounting Method: Bolted
  • Product Length: 10.75 in
  • Product Weight: 4.28 lb
  • Rated Voltage Ac Ul: 600 V
  • Rated Voltage Dc Ul: 300 V
  • Rohs Compliant: Yes
  • Speed Characteristic: Time Delay

Installation & Operation

  1. Mount the fuse in a suitable fuse holder or switchgear 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 according to the provided voltage specifications ensuring compatibility with 600VAC or 300VDC systems.
  4. Configure bolted mounting connections ensuring proper torque specifications for blade terminals.
  5. Test installation and verify proper fuse holder compatibility before placing into service.
  6. Complete final inspection and follow ongoing maintenance practices appropriate to Class L fuse applications.

Professional Applications

  • Commercial Building Electrical Systems
  • Industrial Motor Control Centers
  • High-Current Distribution Panels
  • Manufacturing Facility Power Distribution
  • Data Center Electrical Infrastructure
  • Healthcare Facility Critical Systems
  • Educational Institution Power Systems

Why Choose Mersen Quality?

Mersen delivers proven reliability in high-amperage circuit protection with RoHS compliant construction and professional-grade materials. The GMG insulating material and silver-plated copper terminals ensure long-term performance in demanding electrical environments, backed by comprehensive UL ratings for both AC and DC applications.

Manufacturer Resources

Product Specs

Ac Max I R Breaking Capacity I1:
200 kA
Ac Or Dc:
AC/DC
Ampere Rating:
1200 A
Body Insulating Material:
GMG
Connection Terminal Material:
Silver-Plated Copper
Connection Terminal Type:
Blade
Frequency Hz :
50/60 Hz
Fuse Class:
Class L
Mounting Method:
Bolted
Product Length:
10.75 in
Product Weight:
4.28 lb
Rated Voltage Ac Ul:
600 V
Rated Voltage Dc Ul:
300 V
Rohs Compliant:
Yes
Speed Characteristic:
Time Delay

Mersen A4BY1200 – Frequently Asked Questions

How fast can I get the Mersen A4BY1200 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 A4BY1200 come with a warranty?
Absolutely. The Mersen A4BY1200 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 A4BY1200?
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 A4BY1200 from ZenSupply?
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