20MM 1ASB SLOW BLOW FUSE

Precision Surge Protection: 20mm 1A Slow Blow Glass Fuse (1ASB) 

Ensure the longevity of your sensitive electronics with our 20mm 1A Slow Blow Glass Fuse. Also known as a "Time-Delay" fuse, this specialized component is designed to withstand short-duration high-current surges—such as when a motor or amplifier first powers on—without blowing. If the overcurrent persists, the fuse will safely break the circuit, preventing catastrophic damage to your internal components.

Key Performance Features:

• Time-Delay Technology: Engineered with a coiled internal filament that allows for temporary "inrush" currents, making it perfect for inductive loads.

• Reliable 1A Rating: Precisely calibrated to protect circuits with a standard 1 Amp operating current.

• Standard 20mm Size: Compact 20mm length fits most standard small electronic fuse holders and PCB clips.

• High-Visibility Glass Tube: The transparent housing allows for easy visual confirmation of the fuse's status during maintenance.

• Original Quality Construction: Built with durable nickel-plated end caps for superior conductivity and corrosion resistance.

Why Choose a Slow Blow (T) Fuse over Fast Blow (F)?

Many devices, particularly audio amplifiers and power supplies, draw a significant amount of power for a split second when turned on. A Slow Blow (1ASB) fuse is designed to ignore these harmless, brief spikes. Using a Fast Blow fuse in these scenarios often results in "nuisance blowing," where the fuse breaks under normal startup conditions.

Technical Specs:

•  Fuse Type: Slow Blow / Time-Delay (T).

• Current Rating: 1 Amp (1A).

Top 3 Customer Questions & Concerns ‍

1. Can I replace a Fast-Blow fuse with this Slow-Blow fuse?

   • It is generally not recommended unless specified by the manufacturer. While a Slow-Blow fuse prevents nuisance trips, it reacts more slowly to faults, which could leave sensitive components unprotected if they were designed for a Fast-Blow fuse.

2. What does "1ASB" mean?

   • "1A" stands for the 1 Amp current rating, and "SB" stands for "Slow Blow" (often marked as "T" for Time-delay).

3. Why does the internal wire look like a coil?

   • The coiled wire is a hallmark of Slow-Blow fuses. The coil adds thermal mass, which is what allows the fuse to absorb a brief surge without melting immediately