General
Degree of protection	medium-delay
Operating voltage	250 V
Nominal current	0,315 A

The fuse from manufacturer Eska, type 521.012, is a protective component for electrical circuits in the field of installation technology. It complies with standard DIN 41571-2 and is designed as a medium-time-delay fuse, meaning that it does not unnecessarily trip during short-term current surges, such as those occurring during the start-up of motors or transformers, but only trips during sustained overloads or short circuits. The fuse has dimensions of 5x20 mm and is designed for an operating voltage of 250 V. The rated current is 0.315 A, making it suitable for use in sensitive electronic devices and control systems where precise protection is required.

Fuse is the general term for small, high-precision fuses used in electronic and electrical devices to protect individual circuits against overloads. The designation medium-time-delay describes the time-current characteristic of the fuse: it does not react immediately to short current surges, but behaves with delay, to avoid interfering with the operation of devices with high start-up current surges (e.g. motors, transformers). This is particularly important in installations where the fuse must not trip during every start-up sequence.

DIN 41571-2 is the German standard that specifies technical requirements for fuses. This standard defines, among other things, dimensions, current and voltage values, as well as the time-current characteristic. Fuse 521.012 fully complies with these specifications, enabling safe and standardized use in various applications. The dimensions of 5x20 mm are a common standard for fuses, ensuring universal compatibility with fuse holders and control panels.

The fuse is designed for an operating voltage of 250 V, making it suitable for use in alternating current installations in the field of residential and industrial electrical engineering. The rated current of 0.315 A is a very low current value, typically used in circuits with sensitive electronic components, such as control devices, communication systems, or automation technology. The medium-time-delay design ensures that the fuse only trips during sustained overloads or short circuits, thereby increasing the reliability of the entire system.

The fuse is designed as a fuse, meaning it offers high precision in its protective behavior. Unlike fast-acting fuses, which trip even at short current surges, the medium-time-delay design is dimensioned to account for normal operating conditions of electrical devices. This is particularly important in installations where the fuse must not trip during every start-up of a motor or transformer.

The fuse is designed for use in electrical circuits that require precise protection. It is typically mounted in fuse holders integrated into control panels, device enclosures, or control systems. The dimensions of 5x20 mm allow universal installation in standard holders. The fuse is not designed for direct use in circuits with high current or high voltage, but for applications where exact current limitation is required.

The fuse complies with standard DIN 41571-2, guaranteeing high quality and reliability. The standard specifies that the fuse may be operated at a rated voltage of 250 V and a rated current of 0.315 A. The medium-time-delay design ensures that the fuse does not trip during short-term current surges, increasing operational safety. The fuse is therefore suitable for use in electronic devices, control systems, and automation systems where precise and reliable protection is required.

The fuse is designed as a fuse, meaning it offers high precision in its protective behavior. The medium-time-delay design ensures that the fuse only trips during sustained overloads or short circuits. The dimensions of 5x20 mm are a standard format used in many fuse holders. The fuse is designed for an operating voltage of 250 V, making it suitable for use in alternating current installations. The rated current of 0.315 A is typical for sensitive electronic circuits.

The fuse is not designed for use in circuits with high current or high voltage, but for applications where exact current limitation is required. The fuse is designed for use in electrical circuits that require precise protection. It is typically mounted in fuse holders integrated into control panels, device enclosures, or control systems. The dimensions of 5x20 mm allow universal installation in standard holders.

The fuse complies with standard DIN 41571-2, guaranteeing high quality and reliability. The standard specifies that the fuse may be operated at a rated voltage of 250 V and a rated current of 0.315 A. The medium-time-delay design ensures that the fuse does not trip during short-term current surges, increasing operational safety. The fuse is therefore suitable for use in electronic devices, control systems, and automation systems where precise and reliable protection is required.