ÜSM-A fine protection
device for all installation systems

Quick and easy safe protection

An optimum solution for socket circuit protection. ÜSM-A, the surge fine protection device, type 3 (Class D) according to DIN EN 61643-11 (VDE 0675 Part 6-11) for 230/400 V networks for use on power sockets. The small installation width makes the compact module suitable for use in cable ducts and underfloor systems and in cavity wall and flushmounted sockets. The powerful Y circuit, with integrated isolation device and acoustic defect signal, ensures safe signalling.

• Fine protection device for 230/400 V supplies
• Surge protection device type 3 (class III) to EN 61643-11 (IEC 61643-1)
• Infended for use in safety contakt sockets
• Fits in any standard underfloor, cable ducts and flush mounted sockets.
• The protection device is connected in parallel to the socket and installed behind the socket
• Acoustic signalling Safe defect message guaranteed
• OBO surge voltage protection sign included for safe labelling.
• 5 years warranty