Surge arrester 230V type VF230-AC/DC 5097650

Electrical installation protection with surge arrester VF230-AC/DC

This surge arrester, catalog number 5097650, is a key element in protecting electrical installations from the effects of overvoltage. Designed to operate in both AC and DC circuits, it provides reliable protection for devices sensitive to sudden voltage changes. It is a Type 3 device, meaning it is used as the final line of defense against surges, after earlier stages of protection.

This arrester is particularly useful in MSR automation systems and in standard distribution boards, where mounting is done on a TH-35 mm DIN rail. Compact dimensions (17.5 mm wide) allow for easy integration even in crowded electrical cabinets. Optical indication of the device status informs about possible damage and the need for replacement.

Parameters and functionality

The device is characterized by a rated current of 20A and the ability to dissipate a discharge impulse of 7 kA (L+N-PE) and 2.5 kA (L-N). Protection levels are 1.4 kV (L-PE/N-PE) and 1 kV (L-N), which ensures effective protection against damage caused by atmospheric surges or network disturbances. The rated AC/DC voltage is 230V, and the maximum working AC/DC voltage is 255V and 350V, respectively.

The three-pole design provides comprehensive protection for the entire circuit. The arrester does not have a remote signaling contact or a noise filter, focusing on the basic function of protecting against overvoltage. The maximum wire cross-section that can be connected to the device is 2.5 mm², which ensures compatibility with most standard electrical installations. The IP20 degree of protection guarantees safe use in dry rooms.

Installation and application

Installation is done by snapping onto a TH-35 mm DIN rail - a standard solution that facilitates installation and device replacement. The VF230-AC/DC surge arrester finds wide application in residential, commercial and industrial buildings, where protection against surges is crucial to ensure the reliable operation of electrical and electronic devices. This is especially important for sensitive receivers such as alarm systems, building automation or computer equipment.