Surge arrester T1, T2 (B, C) - leakage current free ETITEC SM T12 300/25 4+0 002440572

Electrical installation protection with ETITEC SM T12 300/25

The ETITEC SM T12 300/25 4+0 surge protector is a reliable element protecting electrical installations from the effects of atmospheric and switching surges. It is a class 1+2 device, which means it provides protection against both direct lightning strikes (T1) and overvoltages resulting from switching loads (T2). The design based on a varistor and spark gap guarantees a quick and effective response to sudden voltage changes.

Construction and application

This surge protector is designed for mounting on a DIN TH-35 mm mounting rail, which facilitates its installation in electrical switchboards. It has 4 poles and is intended for operation in TN-S networks. Its compact size – 8 modules – allows for saving space in distribution cabinets. Optical signaling informs about the operation of the device, which facilitates diagnostics and a quick response in the event of an overvoltage.

Key features and benefits

• Versatile protection: The combination of class T1 and T2 provides comprehensive protection against various types of surges.

• High efficiency: Impact current of 25 kA and a protection level of 1.5 kV guarantee effective limitation of voltage to a safe level.

• Safety of use: Absence of leakage current eliminates the risk of electric shock.

• Easy installation: Standard mounting on a DIN TH-35 mm rail simplifies installation.

• Optical signaling: Allows quick identification of the device status and the need for replacement after operation.

• Large wire throughput: Supports wires with a cross-section of up to 35 mm² (solid/stranded) and 25 mm² (flexible) ensuring compatibility with various types of installations.

• Energy absorption: Specific energy at a level of 156.2 kJ/Ohm indicates the ability to absorb a large amount of energy during a surge.

• Reliability: Made of high-quality materials ensures long-lasting and trouble-free operation of the device.

Operating parameters

The device is adapted to work in networks with a rated voltage of AC 240 V and a maximum continuous operating AC voltage of 300 V. The degree of protection IP20 provides protection against accidental contact, but does not protect against the effects of water. This surge protector is an ideal solution for both residential and commercial installations, where protection against surges is crucial to ensure the safety and continuity of operation of electrical devices.