Mersen ATQ1-4/10 Time Delay Midget Fuse 500V

Product Description

The MERSEN ATQ1-4/10 is a time delay midget fuse rated for 500 volts, designed for use in low-amperage branch circuit and control circuit protection applications. Time delay fuses of this type tolerate brief inrush currents without nuisance tripping, making them well-suited for protecting small motors, transformers, and control equipment. The midget form factor fits standard 13/32-inch by 1-1/2-inch fuse holders and blocks commonly found in industrial control panels and HVAC equipment. Licensed electricians and HVAC technicians are the primary installers of this fuse class.

The ATQ1-4/10 fits applications where compact, high-voltage-rated overcurrent protection is required in tight panel spaces. It is commonly used in commercial and light industrial control circuits, HVAC control panels, motor control centers, and similar low-amperage equipment requiring 500-volt rated protection. The time delay characteristic makes it appropriate for circuits with motors or transformers that draw elevated startup current before settling to normal operating levels.

Key Features

• 500-volt rating supports higher-voltage control circuit applications
• Time delay design tolerates motor and transformer inrush current without nuisance tripping
• Midget fuse form factor fits standard 13/32 inch by 1-1/2 inch fuse holders
• Low-amperage rating suitable for sensitive control circuit protection

Compatibility

Designed as an OEM-style replacement midget fuse for use in standard 13/32 inch by 1-1/2 inch midget fuse holders rated for 500 volts in control panel and HVAC applications.

Installation Notes

Fuse replacement and control panel work should be performed by a licensed electrician or qualified HVAC technician in accordance with NEC requirements. Always de-energize and lock out the circuit before replacing a fuse. Verify the replacement fuse matches the original voltage and amperage rating before installation. Never substitute a higher-amperage fuse to bypass a nuisance tripping condition without first identifying the root cause of the overcurrent fault.