Merit Brass A6D25R 600V RK1 Time-delay Fuse 25A

Product Description

The MERIT BRASS A6D25R is a 600-volt, Class RK1 time-delay fuse rated at 25 amps, designed for branch-circuit and feeder protection in commercial and industrial electrical systems. The time-delay characteristic allows the fuse to ride through harmless inrush currents from motor loads and transformers without nuisance opening, while still providing fast response to sustained overcurrents and short circuits. Class RK1 current-limiting performance provides a high degree of protection for downstream equipment. These fuses are sold in a 10-pack, making them a practical stocking item for electrical contractors and service technicians.

The A6D25R is suited for motor branch circuits, HVAC equipment feeds, control panels, and general-purpose distribution panels where 600-volt, 25-amp branch-circuit overcurrent protection is required. The RK1 classification makes it appropriate for installations where current-limiting fuse performance is specified by the engineer of record or required by equipment labeling. Typical applications include light commercial HVAC units, compressor circuits, and industrial control enclosures operating at voltages up to 600 volts AC.

Key Features

• 600-volt AC rating suitable for a wide range of commercial and industrial branch circuits
• Class RK1 current-limiting construction provides superior downstream equipment protection
• Time-delay design tolerates motor and transformer inrush without nuisance opening
• 25-amp continuous current rating for motor and general-purpose loads
• Sold as a 10-pack for efficient jobsite and panel-room stocking

Compatibility

Designed as an OEM-style replacement for Class RK1 time-delay fuses in 600-volt branch-circuit and feeder applications. Fits standard Class RK1 fuse holders and fusible disconnects rated for this fuse class.

Installation Notes

Installation must be performed by a licensed electrician in accordance with the National Electrical Code (NEC) and applicable local codes. Always de-energize and lock out the circuit at the upstream disconnect or breaker before replacing fuses. Verify the fuse holder or fusible disconnect is rated for Class RK1 fuses and rated at or above 600 volts and 25 amps before installing. Do not substitute a higher-amperage fuse to resolve a repeated opening condition — diagnose the underlying fault first.

Technical Specifications

• Voltage Rating: 600 volts
• Amperage Rating: 25 amps
• Fuse Class: RK1
• Fuse Type: Time-Delay
• Package Quantity: 10 per pack
• Package Dimensions (L x W x H): 5.12 inches x 4.12 inches x 1.75 inches
• Package Weight: 1.47 pounds
• UPC: 78200199185

Standard Information

• Brand: MERIT BRASS
• Manufacturer Part Number: A6D25R