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3A 5x20mm Fast-Blow Glass Fuse - Pack of 5 Electrical Safety Fuses

3A 5x20mm Fast-Blow Glass Fuse - Pack of 5 Electrical Safety Fuses

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ComponentSpecification
Current Rating3 Amps (3A)
Voltage Rating250V AC
Fuse TypeFast-Acting (Fast-Blow)
Dimensions5mm (Diameter) x 20mm (Length)
Body MaterialTransparent Glass
QuantityPack of 5 Units
Price
₹ 12.71 ₹ 12.71
(Tax included)

Product Description The 3A Glass Fuse 5x20mm is a high-quality protective component designed to shield low-to-medium power electronic circuits from overcurrent damage. These standard-sized cartridge fuses feature a transparent glass body for effortless visual inspection and nickel-plated brass end caps for stable electrical conductivity. Rated for up to 3 Amps, they are commonly used in power adapters, multimeters, and DIY electronics projects to provide a reliable fail-safe.

Key Features

  • Fast-Acting Trip Mechanism: Designed to break the circuit instantly during current surges to protect sensitive logic components.

  • High-Clarity Glass: Allows for a quick visual diagnostic to see if the internal wire has melted.

  • Standard Industrial Size: Fits all common 5x20mm fuse holders, clips, and inline housings.

  • Oxidation Resistant: Nickel-plated caps prevent rust and ensure a low-resistance contact point for years.

  • Essential Spares Pack: Comes in a pack of 5 to provide immediate replacements during testing and hardware development.

Technical Details

  • Breaking Capacity: Engineered to quench internal arcs safely at 250V AC without shattering.

  • Filament Precision: Utilises a calibrated metal alloy wire for accurate 3A triggering characteristics.

  • Response Speed: Classified as Fast-Blow (Type F), providing rapid interruption for circuits without high inrush currents.

  • Operating Temperature: Maintains rated performance across a broad range from -20°C to +85°C.

  • Insulation Resistance: Once the fuse is blown, the glass tube provides a high-dielectric air gap to prevent arcing.

  • Voltage Compatibility: While rated for 250V AC, it is equally effective in 12V and 24V DC robotics power rails.

  • Internal Cold Resistance: Minimised to ensure negligible voltage drop across the fuse during normal operation.

  • Mechanical Strength: Robust construction designed to withstand typical industrial vibrations and mechanical shock.

  • Clear Marking: Metal caps are permanently embossed with 3A 250V for easy identification in your component drawer.

  • Environmental Safety: Compliant with modern lead-free and RoHS environmental standards.

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

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

Prototyping and Engineering Tips from Robogears

  • 9V Battery Safety: Use this 3A fuse in series with a 9V battery to protect your breadboard from melting if you accidentally short the power rails.

  • 18650 Series Protection: When using 18650 Lithium cells, a 3A fuse is perfect for protecting medium-sized robots from battery venting due to a stalled motor.

  • IC & Driver Support: Ideal for protecting the L298N Motor Driver or the L293D when running within their 3A continuous current limits.

  • Installation Tip: If you are soldering a holder, use Heat Shrink Tubing to insulate the terminals and prevent stray wires from bypassing the fuse.

  • Related Products: We recommend pairing these with our 5x20mm Inline Screw-Type Fuse Holders and 22 AWG Silicone Wire.

Package Includes

  • 5 x 3A 5x20mm Glass Fuses.

Disclaimer: Images are for illustration purposes only. Always disconnect the power source before inspection or replacement. Never replace a 3A fuse with a higher-rated one than your circuit allows.