NOARK Surge Protector 4P Type C 275V AC Ex9UE2 (103357)

NOARK Ex9UE2 4P 275 V AC (catalog no. 103357) is a modular type 2 surge protector designed to protect low voltage installations from atmospheric and switching surges. The 4P version (4+0) protects all phase wires and is designed for an operating voltage of 275 V AC. The device is equipped with replaceable varistor inserts and an optical indicator of the insert's status; this specific reference does not have a built-in auxiliary contact.

Manufacturer Information

Manufacturer: NOARK — an international supplier of electrical distribution and protection devices. Ex9UE surge protectors have been designed and tested according to the EN 61643-11 standard, meeting the requirements for class II devices (type 2, T2, C) used in industrial and building installations.

Electrical Parameters

• Type of protector: Type 2 (class II, T2, C)
• Permanent working voltage Uc: 275 V AC (L–N) / 275 V AC (N–PE)
• Nominal discharge current In (8/20 µs): 20 kA per pole (L–N); N–PE: 20 kA per pole
• Maximum discharge current Imax (8/20 µs): 40 kA per pole
• Protection level Up for In (L–N): 1.4 kV (for 275 V)
• Protection level Up for Imax (L–N): 2.0 kV
• Protection level Up for 5 kA (L–N): 1.0 kV
• Transient overvoltages Ut (withstood): L–N 335 V (5 s), N–PE 335 V (200 ms)
• Maximum protection with fuse: L–N max. 125 A gG; N–PE max. 125 A gG
• Short-circuit withstand current: L–N 50 kA; N–PE 50 kA

Mechanical and Installation Parameters

• Number of poles / configuration: 4P (4+0)
• Width: 70 mm (4 × 17.5 mm per pole)
• Height: 83 mm (89 mm with rail mounting bracket)
• Front height: 45 mm
• Mounting: on standard TS 35 mm rail
• Protection degree: IP40 (housing), IP20 (terminals)
• Terminals: M5 screws; cross-section of connection wires 2.5–35 mm²
• Tightening torque for terminal screws: 2–3.5 Nm
• Cross-section of auxiliary contact terminals (if applicable): 0.14–1.5 mm²
• Operating ambient temperature: -40 °C to +80 °C
• Absolute height: ≤ 2000 m above sea level
• Climatic resistance (humidity): 30–90 %
• Weight: ~0.11 kg per pole (T2 variant) — 4-pole module: sum of the weights of individual poles