Merit Brass TR17-1/2R Time Delay Fuse 1/2A 250V

Product Description

The MERIT BRASS TR17-1/2R is a time-delay fuse rated at 1/2 amp and 250 volts, designed for protection of sensitive electrical circuits in HVAC, industrial control, and related trade applications. Time-delay fuses allow brief inrush current surges without nuisance tripping, making them well suited for motor loads and transformer circuits that draw higher current at startup. Licensed electricians and HVAC technicians install this class of fuse as a direct component in control panels, disconnect boxes, and equipment fuse blocks.

This fuse is appropriate for residential and light commercial control circuits where low-amperage, time-delay overcurrent protection is required. It is commonly installed in HVAC control panels, low-voltage transformer circuits, and electrical distribution equipment requiring reliable branch-circuit protection at 250 volts or less.

Key Features

• Time-delay design tolerates brief inrush current without nuisance tripping
• Rated 1/2 amp at 250 volts for low-amperage circuit protection
• RK5 class construction for reliable interrupt performance
• Compact form factor suitable for standard fuse blocks and holders

Compatibility

Designed as an OEM-style replacement fuse for low-amperage, 250-volt control circuit applications in HVAC, electrical, and industrial control equipment.

Installation Notes

Installation should be performed by a qualified electrician or licensed HVAC technician in accordance with applicable NEC requirements. Always de-energize and lock out the circuit before removing or installing fuses. Verify that the replacement fuse amperage and voltage ratings exactly match the circuit requirements before installation. Do not substitute a higher-amperage fuse to resolve nuisance tripping.

Technical Specifications

• Amperage Rating: 1/2 amp
• Voltage Rating: 250 volts
• Fuse Class: RK5
• Fuse Type: Time Delay
• UPC: 78200174783

Standard Information

• Brand: MERIT BRASS
• Manufacturer Part Number: TR17-1/2R