Cylindrical fuse insert CH-10 10x38mm gG 25A 400VAC LF325G

Circuit Protection with gG Characteristic and High Short-Circuit Withstand

The 10x38 mm cylindrical fuse link is a key component for the stability of electrical installations, requiring protection for both conductors and connected equipment. This model, designed for operation in AC networks up to 400 V (with capability up to 500 V), fulfills the gG utilization category. This means the element effectively responds to both long-term overloads and short circuits, making it a universal solution in industrial and building distribution boards. Thanks to its ceramic body, the fuse link ensures high mechanical strength and resistance to the high temperatures generated during operation.

Precision of Operation and Easy Installation in Standard Holders

A key aspect of this model is its gG tripping characteristic (often referred to as "general purpose" or "full-range"). It allows safe passage of short-term inrush currents occurring, for example, during the startup of motors or transformers, without the risk of premature blowing. At the same time, in the event of a sustained overload or short circuit, the element reacts instantly, cutting off the power supply.

For the installer, compatibility with commonly used 10x38 mm fuse holders is crucial. The fuse link features an indicator located on the front part (so-called stirnkennmelder), allowing for quick visual inspection of the protection status without the need to disassemble it from the circuit.

System performance depends on correctly matching parameters to the load – in this case, we are dealing with a rated current of 25 A, which provides optimal protection for medium-load circuits. It is worth noting the low power loss of 2.6 W at full load; thanks to this, the element heats up less during normal operation, resulting in lower energy consumption and greater durability of connections. The high short-circuit withstand rating of 120 kA provides a large safety margin even in installations with high short-circuit power, while the frequency range of 50–60 Hz ensures operation in standard power grids.

Application and Operating Conditions

Due to its ceramic construction and high thermal resistance, this fuse link is ideal for environments requiring reliability over years of continuous operation. It is used in main distribution boards and sub-distribution boards as final protection for loads such as:

• Lighting in industrial and office halls;
• Control systems for electric motors;
• Electric heaters and resistance furnaces;
• Control transformers.

Thanks to the high short-circuit current rating (120 kA), this element not only protects the installation against conductor melting but also prevents the spread of electric arcs in the event of serious network faults. It should be noted that this is a one-time-use product – after operation, it must be replaced with a new element with identical parameters to restore full circuit protection.

Correct selection of the fuse link to the conductor cross-section and the characteristics of the loads is the basis for safe operation of the electrical installation in accordance with industry standards. This model forms a solid link in the shock and fire protection system of any facility. The 10x38 mm size guarantees universal mounting, while the ceramic housing ensures durability even with frequent ambient temperature fluctuations. It is important to remember regular inspections of the technical condition of protective elements to maintain the continuity of the power system operation.