Merit Brass TR3R Time Delay Fuse 3A 250V RK5 10 Pack

Product Description

The MERIT BRASS TR3R is a time-delay fuse rated at 3 amps and 250 volts, classified under the RK5 fuse class. Time-delay (TD) fuses are designed to withstand brief inrush currents during motor starts and transformer energizing without nuisance tripping, while still providing reliable overcurrent protection under sustained fault conditions. Sold in a pack of 10, this fuse is a standard trade-quantity format suited for electricians stocking service vans or maintaining panel and equipment inventories. The RK5 classification ensures it meets established rejection standards for current-limiting performance.

This fuse is used in residential and light commercial electrical systems, including HVAC equipment branch circuits, motor control panels, and distribution boards where 250-volt, 3-amp overcurrent protection is required. The time-delay characteristic makes it appropriate for inductive loads such as small motors and transformer primaries. Electricians and HVAC technicians commonly specify RK5-class fuses for equipment protection in fused disconnects and fuse blocks.

Key Features

• 3-amp, 250-volt rating for branch circuit and equipment protection
• RK5 class current-limiting fuse with rejection design
• Time-delay characteristic handles motor inrush without nuisance tripping
• Pack of 10 for efficient stocking and service use
• Compact form factor suitable for standard fuse holders and fused disconnects

Compatibility

Designed as an OEM-style replacement for RK5-class time-delay fuses in 250-volt-rated fuse holders and fused disconnect switches.

Installation Notes

Installation must be performed by a qualified electrician in accordance with the National Electrical Code (NEC). Always de-energize and lock out the circuit before replacing any fuse. Verify the replacement fuse matches the existing amperage, voltage, and fuse class before installation. Do not substitute a fuse of a higher ampere rating to restore power to a faulted circuit.

Technical Specifications

• Amperage: 3 amps
• Voltage: 250 volts
• Fuse Class: RK5
• Fuse Type: Time Delay (TD)
• Quantity per Pack: 10
• Length: 3 inches
• Width: 2.06 inches
• Height: 1.19 inches
• Weight: 0.53 pounds
• UPC: 78200174768

Standard Information

• Brand: MERIT BRASS
• Manufacturer Part Number: TR3R