Mersen P243C Semiconductor Fus...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$175.30
$137.90
Mersen P243C Semiconductor Fuse Block, 1000VAC/1000VDC 200A 1-Pole

Mersen P243C Semiconductor Fuse Block, 1000VAC/1000VDC 200A 1-Pole

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Model: P243C

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

$175.30
$137.90
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Mersen P243C Semiconductor Fuse Block, 1000VAC/1000VDC 200A 1-Pole

The Mersen P243C Semiconductor Fuse Block delivers dependable protection for demanding power electronics applications, rated for dual 1000VAC/1000VDC service at 200A. Built with a durable phenolic body and tin-plated copper stud terminals, this 1-pole, bolt-in fuse block is engineered for semiconductor-class protection with a 10 kA short circuit current rating (SCCR). Direct screw mounting and a compact "4.4" x 2.79" x 2.79" footprint make it well suited for space-constrained industrial and commercial installations requiring reliable, code-compliant overcurrent protection.

Key Features

  • Dual Voltage Rating: 1000VAC/1000VDC capability supports both AC and DC semiconductor protection applications.
  • 200A Current Rating: High amperage capacity handles demanding power protection requirements in industrial and commercial installations.
  • Semiconductor Class Design: Specialized fuse type optimized for fast-acting semiconductor protection.
  • Phenolic Body Construction: Durable insulating material provides excellent electrical isolation and mechanical strength.
  • Tin-Plated Copper Stud Terminals: Corrosion-resistant stud terminals with bolt-in fuse installation ensure reliable, long-term connections.
  • 10 kA SCCR Rating: High short circuit current rating provides robust fault protection capability.
  • Compact, Direct Screw-Mount Design: "4.4" x 2.79" x 2.79" dimensions at 0.25 lb for space-efficient, 1-pole installation.

Certifications & Compliance

  • RoHS Compliant

Technical Specifications

  • Rohs Compliant: Yes

Typical Applications

  • Semiconductor Equipment Protection
  • Industrial Motor Drives
  • Power Electronics Systems
  • DC Power Distribution
  • Variable Frequency Drives
  • Solar Power and Battery Energy Storage Systems

Why Mersen?

Mersen delivers professional-grade electrical protection with RoHS compliant construction and precision engineering. The P243C fuse block combines dual 1000VAC/1000VDC capability with semiconductor-specific, fast-acting design for reliable protection in demanding applications, backed by durable phenolic construction and corrosion-resistant tin-plated copper terminals for long-term, code-compliant performance in industrial and commercial power systems.

Manufacturer Resources

Mersen Product Catalog

Product Specs

AC or DC:
AC/DC
Ampere Rating:
200 A
Body/Insulating Material:
Phenolic
Connection/Terminal Material:
Tin-Plated Copper
Connection Terminal Type:
Stud
Frequency (Hz):
50/60 Hz
Fuse Installation Method:
Bolt-in
Fuse Type Class:
Semiconductor
Installation Mounting:
Direct Screw Mount
Max Fuse Rating:
200 A
Number Of Poles:
1-Pole
Product Height:
2.79 in
Product Length:
4.4 in
Product Weight:
0.25 lb
Product Width:
2.79 in
Rated voltage AC UL:
1000 V
Rated voltage DC UL:
1000 V
Rohs Compliant:
Yes
Short Circuit Current Rating Sccr:
10 kA
Torque Rating:
36 lb-in
Department:
Electrical
Product Group:
Circuit Protection
Product Type:
Fuse Block
Product Subgroup:
Fuse Holders & Blocks

Mersen P243C – Frequently Asked Questions

1) Will the Mersen P243C fuse block work on a 1000V DC solar or battery storage circuit?
Yes. The P243C is rated 1000 V on both AC and DC, so it can be used on 1000 VDC PV string and battery energy storage circuits as well as 1000 VAC at 50/60 Hz. Its short circuit current rating is 10 kA, so the available fault current at the point of installation has to be at or below that figure.
2) What size and type of fuse does the Mersen P243C block accept?
It takes a single semiconductor-class fuse up to 200 A, bolt-in style, in a 1-pole arrangement. The fuse mounts to tin-plated copper stud terminals rather than clipping in, so you need a bolted-tag or stud-mount semiconductor fuse, not a ferrule or blade cartridge.
3) Can I use a semiconductor fuse block like the P243C for ordinary branch circuit or motor protection?
It is built around semiconductor-class fuses, which are fast acting and sized to protect diodes, SCRs and IGBTs in drives and converters. They do not have the time-delay characteristic you want ahead of a motor starter. For general branch and motor circuits, a Class R block such as the Littelfuse LFR60030-3CID or a Class G block like the Littelfuse LFG60015-1SQDINR is the right family instead.
4) Can I use a Class R or Class G fuse block instead of the Mersen P243C?
No, they are not interchangeable. The Mersen P243C accepts bolt-in semiconductor-class fuses and is rated 1000VAC/1000VDC at 200A. The Littelfuse LFR60030-3CID is a Class R block rated 600V 30A and the Littelfuse LFG60015-1SQDINR is a Class G block rated 600V 15A on DIN rail. Class R and Class G fuse bodies do not fit a semiconductor block, and both peers are 600V devices at far lower ampere ratings, so neither covers a 1000V semiconductor protection circuit.
5) How much space do I need in the panel for a Mersen P243C, and how does it mount?
Plan on a footprint of 4.4 in by 2.79 in by 2.79 in, at 0.25 lb. It fastens with direct screw mounting to a subpanel or backplate, so there is no DIN rail clip. For a three-phase circuit you will need three of them, since each block carries one pole.
6) What torque should I use on the Mersen P243C terminals?
Tighten the stud connections to 36 lb-in. The terminals are tin-plated copper studs, so a torque wrench is worth using here; under-torqued studs on a 200 A semiconductor circuit are the usual cause of hot joints.
7) What is the difference between the Mersen P243C and a photovoltaic fuse block like the Bussmann CHPV2?
Both land in 1000 VDC territory, but they solve different problems. The P243C is a single-pole, 200 A semiconductor-class block with bolt-in fuse mounting, sized for drive and converter protection as well as DC distribution. The Bussmann CHPV2 Series is a modular two-pole photovoltaic block rated 1000 Vdc, aimed at PV string protection where you want both conductors fused in one modular assembly.
8) I need a DIN rail fuse block, not a screw-mounted one. What is the option?
The Mersen P243C mounts by direct screw to a panel or subpanel and is not a rail-mounted device. If the enclosure is laid out for DIN rail, the Littelfuse LFG60015-1SQDINR is a DIN rail mount Class G block rated 600V 15A. That is a control-circuit-level device rather than a 200A semiconductor block, so it applies only where the load and fuse class match.
9) For a smaller branch circuit where 200A is overkill, what fuse block do I use instead of the Mersen P243C?
The Mersen P243C is sized at 200A with a 200A maximum fuse rating, so it is oversized for small branch and control circuits. For those, the Littelfuse LFR60030-3CID Class R block at 600V 30A or the Littelfuse LFG60015-1SQDINR Class G block at 600V 15A cover the lower ranges. Both are 600V devices, so verify your system voltage stays within that before ordering.
10) Is the Mersen P243C fuse block RoHS compliant for a spec that requires it?
Yes, the P243C is RoHS compliant. The insulating body is phenolic and the terminals are tin-plated copper.
11) I need a bolt-in fuse block but not a 1000V semiconductor one. What else is there?
The Littelfuse LD Series POWR-BLOKS uses the same bolt-in mounting approach and is the option to look at when your fuse and voltage class do not match the P243C's 1000 VAC/1000 VDC semiconductor rating.
How fast can I get the Mersen P243C 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 P243C come with a warranty?
Absolutely. The Mersen P243C 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 P243C?
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
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