Cylindrical fuse link CH-14 14x51mm gG 50A 400VAC LF450G

Protection of power supply circuits in industrial and domestic installations

The 14x51 mm cylindrical fuse element is a key element for the safety of electrical installations, designed to protect against overloads and short circuits. The device features a rated current of 50 A and is adapted for operation in alternating current (AC) networks with a voltage up to 400 V. Thanks to the use of the gG (general purpose) characteristic, this element effectively protects both cables and devices connected to the circuit, reacting to long-term overloads and sudden current surges.

Construction and operating parameters

The fuse is made of ceramic, which ensures high thermal and mechanical resistance in difficult environmental conditions. Electrical contact is achieved through contact caps made of silver-plated copper, which minimizes contact resistance and limits the heating of the element at the contact point. At a rated current of 50 A, the total power loss is 4.8 W – this value is important when designing distribution boards, where the total heat dissipated by many elements can affect their stability.

The device complies with the requirements of the IEC 60269-1 standard, guaranteeing its compatibility with international safety standards. The operating temperature range is from -25°C to +70°C, and storage is possible in the range from -40°C to +80°C. This makes the fuse element suitable not only for air-conditioned office distribution boards but also for production halls or industrial facilities exposed to temperature fluctuations.

Application and benefits for the installer

This element finds wide application in:

• Main and auxiliary distribution boards in residential and industrial buildings.
• Protection of medium-power electric motors (thanks to the gG characteristic).
• Lighting and socket installations requiring a higher rated current than standard domestic fuses.
• Emergency power systems as a short-circuit protection element.

For the installer, it is also important that the fuse element is sold in bulk packaging of 10 pieces, which facilitates logistics for larger investments. The ceramic housing is corrosion-resistant, and the precise dimensions (14x51 mm) ensure a secure fit into standard fuse holders of type CH-14 or NH-14x51, eliminating the risk of assembly errors resulting from dimensional mismatch.

It is worth remembering that after the fuse has operated (the fuse element has melted), it must be replaced with a new element with identical parameters: rated current 50 A, voltage 400 V AC, and dimensions 14 x 51 mm. The absence of an operating indicator in this model means the necessity of visual inspection or using a meter to check circuit continuity after a failure occurs. This is a standard solution for this class of cylindrical products with a medium rated current, characterized by a power loss at the level of 4.8 W at full load and compliance with the IEC 60269-1 standard.