Uniweld atq3 Midget Time-delay Fuse 3A 500V Ferrule

Product Description

The UNIWELD atq3 is a midget time-delay fuse in the Amp-Trap family, rated for 3 amps at 500 volts AC with a ferrule form factor. Time-delay fuses like this one are designed to tolerate brief inrush currents without nuisance tripping, making them well suited for motor loads, transformers, and control circuits where instantaneous current spikes occur at startup. The atq3 carries an interrupting rating of 10 kA at 500 volts, providing solid overcurrent protection in low-voltage branch circuits and control panels. Electricians and controls technicians select this fuse type for its combination of inrush tolerance and reliable fault clearing.

The atq3 fits standard midget fuse holders and fusible disconnect blocks used in residential, light commercial, and industrial control applications. Typical installations include HVAC control panels, motor control centers, and low-voltage branch circuit protection where a compact ferrule fuse is specified. Its 500-volt rating covers most single-phase and three-phase low-voltage control wiring encountered in the field.

Key Features

• Time-delay design tolerates motor inrush and transformer magnetizing currents without nuisance tripping
• 3-amp rating suits light control circuit and small motor load protection
• 500-volt AC rating covers standard low-voltage single-phase and three-phase applications
• 10 kA interrupting rating at 500 volts for dependable fault clearing
• Ferrule midget form factor fits standard midget fuse holders and disconnect blocks
• Part of the Amp-Trap ATQ family, a widely stocked time-delay midget fuse series

Compatibility

Designed as an OEM-style replacement midget time-delay fuse for use in standard ferrule-type midget fuse holders rated for 500 volts AC or less.

Installation Notes

Installation should be performed by a licensed electrician in accordance with NEC requirements for overcurrent protection and fuse sizing. Always de-energize and lock out the circuit before removing or installing fuses. Verify that the fuse holder is rated for the voltage and current of the circuit before installing the atq3. Do not substitute a non-time-delay fuse in applications where inrush tolerance is required by the equipment manufacturer.

Technical Specifications

• Amperage: 3 amps
• Voltage: 500 volts AC
• Fuse Type: ATQ Midget Time-Delay
• Form Factor: Ferrule
• Interrupting Rating (AIC): 10 kA at 500 volts
• Family: Amp-Trap

Standard Information

• Brand: UNIWELD
• Manufacturer Part Number: atq3