Eaton MDA3/4 Time-delay Fuse 3/4A 250V Ferrule End

Product Description

The EATON MDA3/4 is a small-dimension, time-delay fuse rated at 3/4 amp and 250 volts, designed for protection of electronic circuits and sensitive equipment. Built with a ceramic tube body and nickel-plated brass endcaps, it provides reliable overcurrent protection while tolerating brief inrush currents common in electronic applications. The ferrule-end connection type makes it compatible with standard fuse clips and holders sized for this form factor. With an interrupt rating of 35 AIC at 250 Vac and 10 kAIC at 125 Vac, it is suited for low-energy electronic panel and circuit-board protection tasks performed by electricians and electronics technicians.

This fuse is intended for use in electronic circuits where a time-delay characteristic is required to ride through startup surges without nuisance blowing. Typical applications include control boards, instrumentation, small motors, and other electronic equipment operating at or below 250 volts AC. Its compact 0.25 inch diameter and 1.25 inch length allow it to fit in space-constrained fuse holders commonly found in electronic enclosures and control panels.

Key Features

• Time-delay response: 60 minutes maximum at 135% load, 120 seconds maximum at 200% load
• Interrupt rating: 35 AIC at 250 Vac and 10 kAIC at 125 Vac
• Ceramic tube body with nickel-plated brass endcaps for durability
• Ferrule end X ferrule end connection for standard fuse clip and holder compatibility
• Non-indicating design with typical DC cold resistance of 0.0525 ohms
• Compact form factor: 0.25 inch diameter, 1.25 inch length

Compatibility

Designed as an OEM-style replacement fuse for electronic circuit protection applications requiring a small-dimension, 250V-rated, time-delay ferrule-end fuse.

Installation Notes

Installation should be performed by a qualified electrician or electronics technician. De-energize and lock out the circuit before replacing this fuse, following NFPA 70E electrical safety guidelines. Verify the fuse holder is rated for the same voltage and amperage before inserting the replacement. Do not substitute a fuse with a higher amperage rating, as this will defeat the overcurrent protection for the circuit.

Technical Specifications

• Amperage Rating: 3/4 amp
• Voltage Rating: 250 volts
• Interrupt Rating: 35 AIC at 250 Vac, 10 kAIC at 125 Vac
• Response Time: 60 minutes maximum at 135%, 120 seconds maximum at 200%
• Connection Type: Ferrule end X ferrule end
• Fuse Indicator: Non-indicating
• Material: Ceramic tube, nickel-plated brass endcaps
• Diameter: 0.25 inches
• Length: 1.25 inches
• Width: 0.25 inches
• Weight: 0.4 pounds
• Typical DC Cold Resistance: 0.0525 ohms
• Typical Voltage Drop: 0.182 mV
• Melting (I2T): 44.99
• Application: Electronic circuits
• Type: Electronic

Standard Information

• Brand: EATON
• Manufacturer Part Number: MDA3/4