Overview
The Ferraz Shawmut 21036R is a single-pole Class R fuse block rated for 100 amperes at 250V AC/DC. This industrial-grade fuse holder is engineered for use in power distribution panels, branch circuits, and facility electrical systems. The rejection-style design ensures only Class R fuses fit the block, preventing accidental insertion of incompatible fuse types. Open style construction allows for easy access and maintenance.
Key Features
- Class R Rejection Design: Fits UL Class R fuses rated 61 to 100A with built-in rejection mechanism to ensure proper fuse type usage
- Box Lug Connectors: Accommodates 6 to 2/0 AWG wire in both stranded and solid copper or aluminum
- Durable Insulation: Glass-filled polycarbonate (GFPC) insulators with dielectric strength in excess of 2500V
- Spring-Reinforced Clips: High-conductivity tin-plated copper clips with spring reinforcement for secure fuse retention
- Bolt-Down Mounting: Threaded mounting style for panel and enclosure installation
- Open Design: Easy-access open fuse holder design for quick fuse replacement and inspection
Technical Specifications
- Voltage Rating: 250V AC/DC
- Current Rating: 100 Amperes
- Number of Poles: 1 Pole
- Fuse Class: Class R (UL 512 Certified)
- Fuse Type: Rejection
- Connector Type: Box Lug
- Wire Size Range: 6 to 2/0 AWG (copper or aluminum)
- Mounting Style: Bolt-Down (threaded)
- Body Material: Glass-Filled Polycarbonate (GFPC)
- Fuse Clip Material: Tin-plated copper with spring reinforcement
- Dimensions: 8.33″ L × 1.68″ W × 2.28″ H
- Certifications: UL 512, CSA
Typical Applications
The 21036R Class R fuse block is commonly used in:
- Facility lighting distribution panels and branch circuits
- Industrial equipment protection and motor control circuits
- Commercial electrical systems requiring Class R fuse coordination
- Machinery and system branch circuit protection
- Maintenance panels and feeder circuits in plants and warehouses
Compatibility & Replacements
Compatible With
- Class R fuse series: A2D-R, A2K-R, FLNR, FRN-R, KLNR, KTN-R, KWN-R, LLNRK, LPN-RK, TR-R
- Industrial facility electrical systems
- OEM equipment and panels built to Class R specifications
- Retrofit installations in existing panels
Replaces / Drop-In Replacement For
The 21036R replaces earlier Ferraz Shawmut/Mersen single-pole 100A Class R fuse block models. Verify compatibility with your system integrator or equipment manufacturer before ordering.
Works With
- Class R power fuses (all compatible fuse series listed above)
- Industrial electrical panels and enclosures
- Copper and aluminum conductor wiring (6 AWG to 2/0 AWG)
- Standard bolt-down panel mounting systems
