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Mersen 30323R Class CC Fuse Block, 600VAC/600VDC 30A 3-Pole, Reinforced Clip
The Mersen 30323R Class CC Fuse Block delivers dependable overcurrent protection with dual 600VAC/600VDC voltage capability and a 30A rating in a 3-Pole configuration. Built from glass filled polycarbonate with a reinforced clip pressure plate system, this fuse block is engineered specifically for Class CC fuses and carries a 200 kA short circuit current rating, making it well suited for demanding industrial and commercial electrical panels that require dependable, code-compliant overcurrent protection.
Key Features
- Dual Voltage Rating: 600VAC/600VDC rated for both AC and DC applications at a consistent 30A capacity.
- 3-Pole Configuration: Three-pole design for multi-circuit protection in a single compact fuse block.
- Class CC Fuse Compatibility: Engineered specifically for Class CC fuses, ensuring proper rejection and reliable overcurrent protection performance.
- 200 kA Short Circuit Current Rating: High fault current interruption capability supports demanding electrical environments.
- Glass Filled Polycarbonate Construction: Durable insulating housing provides long-term reliability and electrical isolation in industrial conditions.
- Reinforced Clip Pressure Plate Design: Clip-in fuse installation with enhanced contact pressure for secure retention and easy maintenance access.
- Flexible Mounting: Screw mount or DIN rail installation fits a variety of panel and enclosure layouts.
- Frequency Rating: Rated for 50/60 Hz standard AC power systems.
- Compact Footprint: Measures 3.04 in long by 1.6 in wide by 1.31 in high and weighs 0.35 lb, with a 20 lb-in torque rating for proper terminal connection in space-constrained enclosures.
Certifications & Compliance
- RoHS Compliant
Technical Specifications
- Rohs Compliant: Yes
Typical Applications
- Industrial Control Panels and Motor Control Centers
- Commercial Electrical Distribution Systems
- Manufacturing Equipment Protection
- Process Control and Automation Systems
- Power Distribution Panels
- Renewable Energy System Protection
- Critical Infrastructure Facilities
Why Mersen?
Mersen fuse blocks are built with glass filled polycarbonate construction, a 200 kA short circuit current rating, and RoHS compliant design for dependable, code-compliant performance in professional electrical work. The reinforced clip pressure plate system delivers secure fuse retention and easy maintenance access, while dual 600VAC/600VDC voltage capability and flexible screw mount or DIN rail installation give electrical professionals versatile, reliable overcurrent protection for critical 3-Pole circuits across industrial, commercial, and renewable energy applications.
Manufacturer Resources
Mersen Product Catalog
Product Specs
- Product Type:
- Fuse Block
- Product Material:
- Glass Filled Polycarbonate
- Voltage Rating:
- 600V
- Amperage Rating:
- 30A
- Configuration:
- 3-Pole
- Connection Type:
- Clip-in
- Department:
- Electrical
- Product Group:
- Circuit Protection
- Product Subgroup:
- Fuse Holders & Blocks
- Product Height:
- 1.31 in
- Product Weight:
- 0.35 lb
- Product Length:
- 3.04 in
- Product Width:
- 1.6 in
- Number Of Poles:
- Three-pole
Mersen 30323R – Frequently Asked Questions
1) Can I use this Mersen Class CC fuse block on a DC circuit, like a solar or battery system?
Yes. The 30323R carries a dual 600VAC/600VDC rating at 30A, so it works on DC as well as 50/60 Hz AC systems. That is why it shows up in renewable energy and process control panels. If your PV string runs above 600V, this isn't the block for it; the Bussmann CHPV2 Series photovoltaic block is a two-pole modular design rated 1000 Vdc.
2) Does the 30323R fuse block mount on DIN rail or does it need to be screwed to a panel?
Either. The Mersen 30323R takes screw mounting to a subpanel or snaps onto DIN rail, so you can drop it into an existing control panel layout without reworking the backplate. If you specifically need a bolt-in style block instead, the Littelfuse LD Series POWR-BLOKS is a bolt-in mounting design.
3) Is this Mersen fuse block rated for a panel with a high available fault current?
The 30323R carries a 200 kA short circuit current rating, which covers most industrial service and motor control center applications where available fault current is high. Confirm the SCCR of the assembly as a whole, since the block is only one element of it.
4) What is the difference between the Mersen 30323R and the Littelfuse LFR60030-3CID fuse block?
Both are three-pole, 600V, 30A fuse blocks, but they take different fuse classes. The Mersen 30323R is built for Class CC fuses with a clip-in connection and 600VAC/600VDC dual rating. The Littelfuse LFR60030-3CID is a Class R fuse block rated 600V 30A. Class CC and Class R fuses are physically different sizes with different rejection features, so the block has to match the fuse class you are specifying - they are not interchangeable in the same circuit.
5) Can I use the Mersen 30323R on a solar PV DC circuit, or do I need a dedicated photovoltaic fuse block?
The Mersen 30323R carries a 600VDC rating alongside its 600VAC rating, so it can serve DC circuits up to 600VDC with Class CC fuses. If the array string voltage exceeds that, the Bussmann CHPV2 Series photovoltaic fuse block is a modular two-pole design rated 1000 Vdc and intended specifically for PV service. Check your calculated maximum open-circuit voltage against the 600VDC ceiling before choosing the Mersen block.
6) What torque should I use on the terminals of the Mersen 30323R fuse block?
20 lb-in on the terminal connections. Hitting that value matters on a Class CC block, since loose terminals are the usual cause of heating at the lugs in a densely packed control panel.
7) How do the fuses hold in this block, and can I change them without pulling the block off the rail?
The 30323R uses a clip-in connection with a reinforced clip pressure plate, so Class CC fuses push straight into the clips and pull out by hand for replacement. The block stays mounted; you only need access to the fuse faces. The added clip pressure is there to keep retention tight under vibration.
8) Can I use the 30323R for a single-phase or two-pole circuit instead of three-phase?
It is a fixed 3-Pole block, all three poles in one body, so you would be paying for and mounting a pole you don't use. For a two-pole application, the Bussmann CHPV2 Series is a modular two-pole block. For single-pole DIN rail work, the Littelfuse LFG60015-1SQDINR is a single-pole Class G block at 600V 15A.
9) What is the exact part number to order this Mersen Class CC block?
Mersen part number 30323R. That designation covers the 600VAC/600VDC, 30A, three-pole Class CC block with the reinforced clip. There is one configuration, so there are no suffixes or options to specify beyond the fuses themselves, which are ordered separately.
10) I need a 600V fuse block for a smaller control circuit than 30A - what is an alternative to the Mersen 30323R?
For a lighter control circuit, the Littelfuse LFG60015-1SQDINR is a Class G fuse block rated 600V 15A with DIN rail mounting. It is a single-pole Class G device, so it suits a smaller branch than the 30A three-pole Class CC Mersen 30323R. Confirm the fuse class your drawing calls out first - Class G and Class CC fuses are not interchangeable in the same holder.
11) Is a bolt-in fuse block a substitute for the clip-in Mersen 30323R?
Not directly. The Mersen 30323R uses a clip-in fuse connection with a reinforced clip pressure plate, so the fuse snaps into spring clips. The Littelfuse LD Series POWR-BLOKS block uses bolt-in mounting, which is intended for bolt-mount fuse bodies rather than ferrule-style Class CC fuses. The mounting method has to match the fuse body you are buying, not just the amperage and voltage.
12) What is the Mersen 30323R housing made of, and will it hold up in an industrial enclosure?
Glass filled polycarbonate. It is the standard insulating body material for control panel fuse blocks, chosen for dimensional stability and electrical isolation where the enclosure runs warm. The block is also RoHS compliant, which matters if you're building panels for export or for a customer with a restricted substances spec.
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Does the Mersen 30323R come with a warranty?
Absolutely. The Mersen 30323R is backed by a manufacturer’s warranty.
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