These are fast acting glass fuses in the A70QS series: A70QS354, A70QS404, and A70QS504. They provide rapid overcurrent protection for electrical circuits and are designed for reliable replacement in standard fuse holders. - Fast acting protection to limit damage from overloads or short circuits - Compact, standard form factor compatible with common fuse clips and holders - Glass body with metal end caps for secure termination and durability - Transparent construction lets you visually confirm the fuse status at a glance - A70QS series offers multiple current ratings across models to fit different circuit needs - Predictable and fast trip characteristics for dependable protection - Easy replacement by selecting a matching rating and form factor Typical applications - Power supplies and LED drivers to prevent component and wire damage - Industrial control panels and automation circuits to safeguard controllers and sensors - Prototyping and test benches or hobby electronics requiring quick overcurrent protection Choosing the right model - Select based on the circuit current requirement and the protection level needed - Ensure the replacement matches the same form factor and rating as the original fuse