Surge arrester DEHNrail M 2P 255, 2-pole for 230 V AC network 953200

Surge protector for protecting devices and installations

The DEHNrail M 2P 255 surge protector is a two-pole device designed to protect against the effects of overvoltages in 230 V AC networks. It is a Type 3 component, meaning it is used to protect end devices, acting as the last line of defense against disturbances. Its modular design simplifies mounting on a DIN TH-35 mm rail and provides flexibility in configuring the overvoltage protection system.

Features and application

This surge protector is used in electrical installations of residential, commercial, and industrial buildings. It protects connected electronic devices, such as audio-video equipment, computers, alarm systems, and home automation, from damage caused by sudden voltage increases. Thanks to its high efficiency and reliability, the DEHNrail M 2P 255 ensures safe and stable operation of the electrical installation.

• Type 3 protection: Effectively suppresses residual overvoltages after atmospheric discharges or network maneuvers.
• High impulse current withstand: The use of zinc oxide varistors in combination with a spark gap guarantees a high ability to absorb energy from surge pulses.
• Energetic coordination: Possibility of cooperation with other protectors from the Red/Line family, creating a comprehensive overvoltage protection system.
• Optical signaling: Status indicator allows for quick visual assessment of device functionality.
• Safety: Protected by a 25 A fuse (gG or B), protecting against overload and short circuit.
• Universal mounting: Mounting on a standard DIN TH-35 mm rail simplifies integration with existing electrical infrastructure.

Technical parameters and additional information

The device is characterized by a rated current of 25 A and the ability to dissipate a discharge current of 3 kA (8/20 µs). The L-N protection level is 1.25 kV, and L-PE/N-PE – 1.5 kV, which ensures effective protection against damage caused by overvoltages. The maximum conductor cross-section is 4 mm² for stranded and solid conductors and 2.5 mm² for flexible conductors. It is important to use appropriate overcurrent protection (25 A fuse) to ensure proper device operation and installation safety. The surge protector does not have a remote signaling contact or an interference filter.