Hardt 5581 Glass Fuse 1.5A 250V Fast Acting 0.25x1.25 in

Product Description

The HARDT 5581 is a fast-acting glass fuse rated at 1.5 amps and 250 volts, sized at 0.25 x 1.25 inches in the standard AGC/3AG form factor. It provides overcurrent protection in control circuits, small appliances, HVAC equipment, and light commercial electrical panels. The fast-acting response characteristic means it opens quickly on overload, protecting sensitive downstream components. Licensed electricians and HVAC service technicians install this fuse type as a direct replacement during routine maintenance or troubleshooting of blown-fuse conditions.

This fuse is suited for residential and light commercial applications where a 0.25 x 1.25-inch glass cartridge fuse is specified. Common install scenarios include low-voltage control boards, transformer secondary circuits, and equipment protection circuits that require a fast-acting response at or below 1.5 amps and 250 volts. Always verify the equipment nameplate or service manual for the correct amperage and voltage rating before installing a replacement fuse.

Key Features

• Fast-acting response for immediate overcurrent protection
• Rated 1.5 amps at 250 volts
• Standard 0.25 x 1.25-inch glass body — widely compatible form factor
• Glass construction allows visual inspection of the fuse element without removal
• Compact dimensions: 1.15 inches long x 0.3 inches wide x 0.2 inches tall

Compatibility

Designed as a standard-size replacement for equipment requiring a 0.25 x 1.25-inch fast-acting glass cartridge fuse rated at 1.5 amps and 250 volts.

Installation Notes

Always de-energize and lock out the equipment before replacing a fuse. Confirm the replacement fuse matches the original amperage, voltage, and speed rating — substituting a higher amperage or slow-blow fuse can damage equipment or create a fire hazard. Use an appropriate fuse puller for cartridge fuse holders to avoid contact with live terminals. Fuse replacement in electrical panels or control boards should be performed by a qualified electrician or licensed HVAC technician in accordance with NFPA 70 (NEC) requirements.