Ferraz Shawmut ATQ1 Cylindrical Time Delay Fuse 1A 500V

Product Description

The FERRAZ SHAWMUT ATQ1 is a cylindrical time delay fuse rated at 1 amp and 500 volts AC, designed for electrical circuit protection in commercial and industrial applications. The time delay characteristic allows temporary inrush currents to pass without nuisance tripping, while still providing reliable overcurrent protection under sustained fault conditions. With an interrupting rating of 10 kiloamps (kA) at AC, this fuse is built to safely clear high-magnitude fault currents. It carries the GMG classification, consistent with IEC cylindrical fuse standards. Electricians and controls technicians install this fuse in control panels, instrumentation circuits, and low-current branch circuits where precise, reliable protection is required.

The ATQ1 is suited for residential and light commercial control circuits, as well as industrial instrumentation panels where low-amperage time delay protection is needed. Its compact cylindrical form factor fits standard fuse holders and fusible disconnect blocks designed for this fuse class. It is a common choice for protecting transformer secondary circuits, motor control logic circuits, and sensitive electronic equipment requiring time delay overcurrent protection.

Key Features

• 1 amp rating provides precise low-current circuit protection
• 500 volt AC rating suits a wide range of control and instrumentation circuits
• 10 kA interrupting capacity at AC for reliable fault clearing
• Time delay design prevents nuisance tripping on inrush or startup currents
• GMG classification consistent with IEC cylindrical fuse standards
• Compact 10.3 mm diameter cylindrical body fits standard fuse holders

Compatibility

Designed as an OEM-style replacement for cylindrical time delay fuses in standard fuse holders and fusible disconnect blocks rated for the GMG cylindrical fuse class.

Installation Notes

Installation should be performed by a licensed electrician in accordance with the National Electrical Code (NEC) and applicable local codes. Always de-energize and lockout/tagout the circuit before replacing any fuse. Verify that the replacement fuse amperage, voltage, and interrupting ratings match or exceed the original equipment requirements before installation. Do not install a higher-amperage fuse than the circuit is rated to carry.