1A 5x20mm Fast-Blow Glass Fuse - Pack of 5 Electrical Safety Fuses

Product Description The 1A Glass Fuse 5x20mm is a precision safety component designed for low-power electronic circuits. These standard-sized cartridge fuses act as a sacrificial link, instantly interrupting electrical flow when the 1A threshold is reached. Featuring a high-clarity glass body for rapid visual inspection and nickel-plated brass end caps for steady conductivity, this pack of 5 is perfect for protecting sensitive multimeters, low-power adapters, and delicate control boards.

Key Features

• Instant Overload Response: Fast-acting filament design triggers immediately when current exceeds 1A to protect sensitive logic components.

• Transparent Diagnostic Tube: Clear glass allows for quick visual inspection to confirm if the internal filament has blown.

• Corrosion-Resistant Caps: Nickel-plated brass end caps ensure low contact resistance and long-term durability.

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

• Prototyping Essential: Pack of 5 provides necessary spares for testing, repair, and hardware development.

Technical Details

• Breaking Capacity: Safely interrupts current flow in circuits up to 250V AC without the glass tube shattering.

• Filament Composition: Calibrated alloy wire designed for accurate and repeatable 1A current triggering.

• Response Speed: Classified as Fast-Blow (Type F), which is critical for protecting logic-level parts that cannot tolerate surges.

• Operating Temperature: Maintains stable current ratings in ambient environments ranging from -20°C to +85°C.

• Insulation Resistance: Once triggered, the glass body provides complete electrical isolation to prevent arcing.

• Voltage Compatibility: Fully rated for 250V AC, but also highly effective in 12V and 24V DC robotics power rails.

• Internal Resistance: Low internal cold resistance to minimize voltage drop across the fuse link during normal operation.

• Mechanical Standards: Complies with standard 5mm x 20mm (M20) miniature cartridge fuse specifications.

• Marking: Caps are clearly stamped with 1A 250V for permanent and error-free identification.

• Vibration Resistance: Designed to withstand the mechanical vibrations common in industrial control panels and mobile robotics.

• Lead-Free Construction: Compliant with modern RoHS environmental safety standards.

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