Mars 83336 Fused Disconnect Switch NR421

Product Description

The MARS 83336 is a fused disconnect switch designed for use in HVAC, refrigeration, and light commercial electrical applications. This switch carries the NR421 designation and is manufactured by MARS, a trusted supplier of electrical and HVAC components used by technicians and contractors across the industry. Fused disconnect switches serve a critical role in electrical systems. They allow a technician or installer to safely isolate a piece of equipment from its power source for maintenance, service, or replacement. The built-in fuse adds a layer of overcurrent protection, helping to prevent damage to motors, compressors, and control components downstream. HVAC service technicians rely on fused disconnects when working on condensing units, air handlers, rooftop units, and packaged systems. The combination of a manual disconnect and fuse protection in a single compact unit simplifies installation and reduces the number of components needed in a panel or disconnect enclosure. The MARS 83336 is built to meet the demands of field installation, where reliable performance and straightforward wiring are essential. Whether you are replacing a failed disconnect on a residential condensing unit or wiring a new commercial installation, this fused switch delivers dependable overcurrent protection and safe isolation capability. MARS products are widely stocked by HVAC distributors and are recognized for consistent quality and compatibility with standard industry applications. Electricians and HVAC technicians searching for a fused disconnect switch, NR421 replacement, or MARS 83336 will find this unit fits common service and installation needs. Always verify the voltage and amperage ratings of your application match the specifications of the switch before installation.

• Fused connection type provides built-in overcurrent protection for connected HVAC and electrical equipment
• Functions as a manual disconnect to safely isolate equipment during service and maintenance
• Manufactured by MARS, a recognized supplier of HVAC and electrical components for trade professionals

Product Highlights

The MARS 83336 fused disconnect switch combines manual isolation and overcurrent protection in a single unit, making it a practical choice for HVAC and light commercial electrical installations. It is a direct replacement for NR421 applications.

Product Information

Standard Information

• Brand: MARS
• Manufacturer Part Number: 83336

Technical Specifications

• Connection Type: Fused
• Series: NR421