Screw Fuse Features High Breaking Capacity

Fuses are classic short-circuit and overload protection devices widely used in power distribution and control systems.

The fuse industry is developing toward high breaking capacity, fast response, and high-grade materials.

With years of experience, Shuguang Fuse provides a full range of products suitable for industrial and power distribution applications.

A fuse mainly consists of a fuse element and an insulating base.

When a short circuit occurs, the fuse element melts quickly to disconnect the circuit.

Most advanced fuses use silver or copper elements and high-strength ceramic tubes with quartz sand for better arc extinguishing.

Shuguang Fuse uses precision-pure silver fuse elements and heat-resistant, impact-resistant insulation for stable and reliable protection.

Common Fuse Types & Applications

1. Plug-in Fuse

Used for low-voltage circuits up to 380V.

Modular design for easy replacement.

Tin-plated contacts ensure low resistance and anti-oxidation.

Ideal for residential and light industrial use.

2. Screw Fuse

Equipped with a visible fuse indicator.

Widely used in machine tool control systems.

Features high breaking capacity, suitable for circuits up to 500V, 200A.

Shuguang screw fuse has a strong ceramic housing and sensitive indicator,

performing better than standard products in heavy-duty working conditions.

3. Enclosed Fuse

Divided into filled and non-filled types.

Fused type with quartz sand offers excellent breaking capacity,

suitable for circuits up to 500V, 1000A.

Shuguang’s filled fuse uses high-purity quartz sand and good sealing,

working well in outdoor and humid environments.

4. Fast-Acting Fuse

Mainly used for protecting semiconductors and rectifiers.

Designed with variable-section silver elements for ultra-fast response.

Widely applied in new energy, PV, and high-voltage DC systems.

5. Self-Reset Fuse

Uses metallic sodium as the fuse element.

Limits short-circuit current and automatically recovers after fault removal.

Suitable for precision power systems where frequent power outages are not allowed.

Fuse Selection Guidelines

Rated voltage must match the system voltage.

Rated current should be higher than the normal working current.

Current-limiting capacity must exceed the maximum short-circuit current.

Fuse rating must match motor starting characteristics (4–8×In for 5–10 seconds).

Shuguang Fuse provides a full range of specifications and can be customized for different motors and equipment.