5A 5x20mm Fast-Blow Glass Fuse - Pack of 5 Electrical Safety Fuses

Product Description The 5A Glass Fuse 5x20mm is a crucial safety component designed to safeguard electronic devices from overcurrent and short-circuit conditions. These standard-sized "small" cartridge fuses feature a high-clarity glass body, allowing for a quick visual inspection of the internal filament. Rated for up to 5 Amps, they are commonly used in power supplies, control panels, and consumer electronics to provide a reliable fail-safe that interrupts power before damage occurs.

Key Features

• Instant Overcurrent Response: Fast-acting design designed to blow immediately during current spikes to protect sensitive logic boards.

• Transparent Diagnostic Tube: Clear glass allows for easy "at-a-glance" verification to see if the internal wire has melted.

• Corrosion-Resistant Caps: Features nickel-plated brass end caps for steady conductivity and a long-term, reliable connection.

• Universal Small Format: Standard 5x20mm dimensions compatible with all common panel-mount and PCB-mount fuse holders.

• Essential Spares Pack: Includes 5 units, providing immediate replacements for your workbench or production kits.

Technical Details

• Breaking Capacity: Safely ruptures under fault conditions in circuits up to 250V AC without shattering.

• Filament Composition: Calibrated zinc or silver alloy wire for precise and repeatable 5A current triggering.

• Response Characteristic: Fast-Blow (Type F), reacting within milliseconds to protect components that cannot tolerate sustained surges.

• Operating Temperature: Maintains stable performance across a wide thermal range from -20°C to +85°C.

• Insulation Integrity: Once blown, the glass tube provides a high-dielectric air gap to prevent any internal arcing.

• Voltage Compatibility: Fully rated for 250V AC, and highly effective for high-current 12V and 24V DC battery rails.

• Internal Cold Resistance: Engineered to be extremely low to minimize voltage drop across the fuse during normal operation.

• Mechanical Strength: Robust construction designed to withstand the mechanical vibrations found in industrial equipment.

• Permanent Marking: Metal end caps are clearly embossed with 5A 250V for error-free identification.

• Environmental Safety: Manufactured using lead-free processes compliant with modern RoHS standards.

• Universal Integration: Ideal for protecting battery chargers, LCD monitors, and small motorized appliances.

• Hardware Safeguard: Acts as the intentional weak point to protect expensive PCBs and wiring harnesses from thermal damage.