Merit Brass A2D90R Time-delay Fuse 90A 250V RK1 5 Pack

Product Description

The MERIT BRASS A2D90R is a time-delay (TD) fuse rated at 90 amps and 250 volts, classified under the RK1 fuse class. Time-delay fuses in the RK1 class are engineered to withstand temporary inrush currents common in motor loads and HVAC compressor circuits while still providing reliable overcurrent protection. This fuse arrives in a 5-pack configuration, making it practical for service vans and shop stock. Electricians and HVAC technicians install this type of fuse in fusible disconnect switches, load centers, and equipment service disconnects where motor loads require a fuse that will not nuisance-trip on startup.

The A2D90R is suited for residential and light commercial electrical applications where an RK1-class time-delay fuse is specified. Common install scenarios include HVAC condensing unit disconnects, compressor panels, and motor-driven equipment that draws significant startup current. The 5-per-pack quantity supports multi-unit service calls or stocking requirements at a shop or supply house. Packaged dimensions are 6.000 inches by 5.380 inches by 1.060 inches, with a total pack weight of 1.630 pounds.

Key Features

• 90-amp rating suitable for large motor and compressor circuit protection
• 250-volt rating for single-phase and compatible multi-phase circuits
• RK1 class designation provides high interrupting capacity and rejection feature to prevent misapplication
• Time-delay design tolerates motor inrush without nuisance opening
• Sold in a 5-pack for stocking and multi-unit service efficiency

Compatibility

Designed as an OEM-style replacement for RK1-class time-delay fuses in fusible disconnects and overcurrent protection equipment rated for 90 amps at 250 volts.

Installation Notes

Installation must be performed by a qualified electrician in accordance with the National Electrical Code (NEC) and applicable local codes. Always de-energize and lock out the disconnect or panel before removing or installing fuses. Verify that the fuse holder or disconnect is rated for RK1-class fuses before installation, as RK1 fuses require a rejection-style holder. Never replace a fuse with a higher amperage rating than the circuit is designed to carry.

Technical Specifications

• Amperage: 90 amps
• Voltage: 250 volts
• Fuse Class: RK1
• Fuse Type: Time-Delay (TD)
• Quantity per Pack: 5
• Package Dimensions (L x W x H): 6.000 inches x 5.380 inches x 1.060 inches
• Package Weight: 1.630 pounds
• UPC: 78200199100

Standard Information

• Brand: MERIT BRASS
• Manufacturer Part Number: A2D90R