Bel Fuse Ceramic Cartridge Fuse, Time Delay, 4A, 250V AC, 5mm x 20mm

The Bel Fuse 0659C Ceramic Cartridge Fuse is a reliable, time-delay (slow blow) fuse designed to provide robust protection for sensitive electronic and electrical circuits. Its 4A rating and 250V AC voltage specification make it an ideal choice for a wide range of commercial and domestic applications where stable, long-term performance is critical.

This fuse features a high-quality ceramic body, which offers superior durability and excellent heat resistance compared to glass alternatives. The ceramic construction ensures the fuse can withstand higher temperatures and provides enhanced mechanical strength, contributing to a longer service life and consistent operation in demanding environments.

A key characteristic of this component is its time-delay (slow blow) function. This design allows the fuse to tolerate temporary inrush currents—common when switching on devices like power supplies, adapters, and transformers—without blowing unnecessarily. This protects the circuit from nuisance tripping while still providing reliable protection against sustained overloads and short circuits.

With an industry-standard 5mm x 20mm form factor, it is compatible with a vast array of fuse holders and panels. The fuse boasts a high breaking capacity of 1.5kA at its rated voltage, meaning it can safely interrupt substantial fault currents, making it suitable for use in primary power circuits. Its compact and robust design ensures easy installation and reliable performance in constrained spaces.

Key Features & Specifications

• Fuse Type: Ceramic Cartridge, Time Delay (Slow Blow)
• Rated Current: 4 Amps
• Voltage Rating: 250 Volts AC
• Dimensions: 5mm x 20mm (Standard Metric Size)
• Breaking Capacity: 1.5kA at rated voltage
• Construction: Robust ceramic body for enhanced durability and heat dissipation
• Product Series: 0659C Series

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