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Mersen Class R Fuse Reducer, R Series 600V AC/DC
The Mersen Class R Fuse Reducer (R Series) allows lower-rated fuses to be installed in existing equipment fitted with Class R clips of a higher ampere rating, letting installers size protection closer to actual motor nameplate current for improved circuit protection. As a rejection-type reducer, it accepts only Class R fuses in Class R clips, and it is rated 600 VAC / 600 VDC with a 200 kA SCCR for demanding industrial and commercial applications. The product is UL Listed and CSA Certified across the 30-600A range covered by the Class R standard.
Key Features
- Rejection-Type Design: Accepts only Class R fuses into Class R clips, preventing substitution of incorrectly rated fuses.
- Upgraded Circuit Protection: Allows closer-rated, time-delay Class R fuses to be used in place of renewable or one-time fuses, improving protection for motor and feeder circuits.
- Dual Voltage Rating: Rated 600 VAC and 600 VDC for broad application across AC and DC electrical systems.
- High SCCR: Short-circuit current rating of 200 kA supports use in high-fault-current environments.
- Standards Coverage: Certified to the 250V and 600V Class R standard across the 30-600A range.
- Retrofit Compatible: Fits into existing equipment with Class R clips of higher ampere rating without replacing the clip assembly.
Certifications & Compliance
- UL Listed, Guide No. IZZR, File E105670
- CSA Certified, 6225-01 207417
- Certified to 250V and 600V Class R Standards, 30-600A
Technical Specifications
- Class: R
- AC Voltage: 600 VAC
- DC Voltage: 600 VDC
- SCCR: 200 kA
- UL Certification: E105670 IZZR.E105670
- CSA Certification: 6225-01 207417
- Standards: 250V and 600V Class R - UL Listed Guide No. IZZR, CSA Certified, 30-600A
Typical Applications
- Motor Circuit Fuse Protection Upgrades
- Retrofitting Existing Class R Fuse Clips with Closer-Rated Fuses
- Industrial and Commercial Electrical Panels
- Feeder Circuit Protection Sized to Load Current
- Replacement of Renewable or One-Time Fuses with Time-Delay Fuses
Why Mersen?
Mersen Class R Fuse Reducers give electrical professionals a UL Listed, CSA Certified way to bring existing Class R fuse clips into tighter alignment with actual load requirements, without replacing equipment. With a 600 VAC/VDC rating and 200 kA SCCR, these reducers support code-compliant, reliable circuit protection for motor and feeder applications where precise fuse sizing matters.
Manufacturer Resources
Product Specs
- AC Voltage:
- 600 VAC
- UL Certification:
- E105670 IZZR.E105670
- DC Voltage:
- 600 VDC
- Lead Free:
- Consult Technical Services
- ROHS Compliant:
- Consult Technical Services
- CSA Certification:
- 6225-01 207417
- Standards:
- 250V and 600V Class H, K, and R - UL Listed Guide No. IZZR, CSA Certified. 600V Class J - UL Listed Guide No. IZZR, CSA Certified 30-600A
- Class:
- R
- CE conformity:
- Consult Technical Services
- SCCR:
- 200 kA
- list_batch:
- MERSEN-20260825
- Department:
- Electrical
- Product Group:
- Wiring Devices
- Product Type:
- Fuse Reducer