Surge arrester DEHNguard M TNS 275 FM, 4-pole for 230 V AC networks 952405

### Surge protection for your installation

The DEHNguard M TNS 275 FM surge arrester is a reliable element protecting the electrical installation from the effects of voltage transients. The device is designed for mounting on a TH-35 mm DIN rail and provides protection in TN-S networks. It is a key component for ensuring the safety and continuity of operation of electrical devices, especially in systems sensitive to interference.

Functionality and application

This four-pole (4P) class 2 arrester, with a maximum discharge current of 40 kA (8/20 µs) and a rated discharge current of 20 kA, effectively protects against overvoltages in 230 V AC networks. Its construction based on zinc oxide varistors guarantees a quick response and high impact resistance. Additionally, the presence of a remote signaling contact allows for continuous monitoring of the device's status and quick detection of any failure. This arrester finds application in both residential and commercial installations, as well as in photovoltaic systems.

Key features and benefits

• Versatile protection: Protects against overvoltages in TN-S networks, minimizing the risk of equipment damage.
• High efficiency: A discharge current of 40 kA provides protection even with strong voltage surges.
• Status indication: Optical indicator and remote signaling contact facilitate monitoring of the device's status and quick response in the event of a failure.
• Durable construction: The use of high-quality materials guarantees long life and reliable operation.
• Easy installation: Mounting on a standard TH-35 mm DIN rail simplifies integration with the existing electrical installation.
• Safety: Short-circuit strength at 50 kA provides additional safety in the event of a short circuit.
• Compliance with standards: The product meets the requirements of PN-EN 61643-11, which confirms its quality and safety.
• Versatility: Can be used in various types of electrical installations, including photovoltaic systems.

Parameters for professionals

The DEHNguard M TNS 275 FM arrester is characterized by a maximum cross-section of flexible conductors up to 25 mm² and rigid conductors up to 35 mm². The maximum overcurrent protection for series connection is 100 A, and for parallel connection – 125 A. The protection level is 1.5 kV for both L-PE and N-PE circuits. The device occupies 4 modules on the DIN rail, allowing for compact placement in the distribution box. It is worth noting the impulse withstand voltage (UT) of 335 V for 5 seconds and a wide operating temperature range from -40°C to +80°C.