314015 – LITTELFUSE

Overview

The Littelfuse 314015 is a fast-acting ceramic cartridge fuse designed for robust circuit protection in demanding environments. Its primary function is to interrupt fault currents rapidly, safeguarding sensitive components from damage. A critical design consideration for fast-blow fuses like the 314015 is the trade-off between speed of interruption and susceptibility to nuisance tripping from temporary inrush currents; engineers must carefully select the appropriate fuse rating to balance protection with operational stability, especially in applications with significant capacitive loads or motor start-up transients. This 15A, 250VAC rated fuse offers a low 5.1 mΩ resistance, minimizing power dissipation under normal operating conditions.

Key Features

• Current Rating: 15 A
• Voltage Rating AC: 250 VAC
• Fuse Type: Fast Blow
• Fuse Size/Group: 3AB (6.3 mm x 32 mm)
• Operating Temperature Range: -55 C to +125 C
• Low Resistance: 5.1 mOhms

Applications

The component is engineered for deployment in systems requiring high reliability and performance under specific operating conditions. It provides functional stability across the stated design envelope.

• High-power supply input stage protection
• Overcurrent safeguarding in industrial motor control circuits
• Transient surge suppression in test and measurement equipment
• Fault interruption in power distribution units (PDUs)