K1-4PG275 Mersen Surge Protector Type 1+2 SPD 4 Pole 230/400 Volt 20KA TT

Why Choose the SPD T1+2, 3+1, Uc 275Vac K1-4PG275?

The SPD T1+2, 3+1, Uc 275Vac K1-4PG275 provides reliable Type 1+2 surge protection for three-phase TN and TT systems, safeguarding critical equipment against high-energy transients and switching surges. With a maximum continuous operating voltage (Uc) of 275Vac and coordinated 3+1 circuit configuration, it ensures robust and efficient overvoltage protection in industrial and commercial installations.

This compact device offers plug-in modules for easy replacement, visual status indication for maintenance efficiency, and compliance with IEC 61643-11 standards. Ideal for switchboards and distribution panels, it enhances system resilience, prolongs equipment lifespan, and supports uninterrupted operation in demanding environments.

Technical Specifications

• Item number: 44120400
• Catalogue No: K1-4PG275
• Description: SPD, T1+2, 3+1, Uc 275Vac
• EAN/UPC Code: 8435297888208
• RoHS Compliant: Yes
• IEC SPD Type: Class I+II
• UL SPD Type: Type 1 Component Assembly
• Format: Pluggable
• Nominal Operating Volt Rating (Un): 230/400
• AC or DC: AC
• Nominal Discharge Current (In) (8/20): 20 kA
• Max Discharge Current : Imax (8/20): 50 kA
• Protection Modes: L-N / N-PE
• System Configuration: TT, TNS
• Lightning Impulse Current (10/350) (LIMP): 12.5 kA
• Following Current (Ifi): 100 A
• Short Circuit Withstand (ISCCR): 25 kA
• Indication System: Yes
• Indication System Type: Green (OK) / Not green (replace)
• Number of Poles: 4-Pole
• Torque Rating: 3 Nm
• Max. Back-Up Fuse: 315 A [gG]
• Housing Material: PA6 CT1 & PA66 CT1
• Installation Mounting: DIN rail
• Uc (L-N): 275 V
• Uc (N-PE): 255 V
• Up at In (N-PE): ≤1,5 kV
• Up at In (L-N): ≤1,5 kV
• Up at In (L-PE): ≤1,8 kV
• MCOV L-G: 275 V
• MCOV L-L: 550 V
• MCOV N-G: 305 V
• MCOV L-N: 275 V
• VPR L-G: 1500 V
• VPR L-L: 2000 V
• VPR N-G: 1000 V
• VPR L-N: 1200 V
• Replacement Plug N-PE: 44120000
• Replacement Plug L-N: 44120001
• Product Width: 72 mm
• Product Length: 90.4 mm
• Product Height: 90 mm
• Sell Pack Quantity: 1 EA
• Sell Pack Weight: 0.655 kg
• Sell Pack Width: 78 mm
• Sell Pack Length: 97 mm
• Sell Pack Height: 118 mm
• Product group: Power Line SPDs
• Product Weight: 0.612 kg

Product Code: 44120400

Key Benefits

• Provides comprehensive Type 1+2 surge protection for three-phase TN and TT systems.
• High nominal discharge current of 20 kA and maximum discharge current of 50 kA for robust protection.
• Plug-in modules allow for easy replacement and maintenance.
• Visual green status indication simplifies monitoring and maintenance.
• Complies with IEC 61643-11 standards ensuring reliable and tested performance.
• Compact design suitable for DIN rail mounting in switchboards and distribution panels.
• Supports multiple protection modes (L-N / N-PE) for versatile application.

Compatibility

This surge protection device is compatible with three-phase TN and TT electrical systems operating at nominal voltages of 230/400 V AC. It is designed for use in industrial and commercial switchboards and distribution panels with DIN rail mounting. The device supports coordination with backup fuses up to 315 A [gG] and is suitable for systems requiring Class I+II surge protection.

Applications

• Industrial and commercial electrical distribution systems.
• Switchboards and distribution panels in manufacturing plants.
• Protection of sensitive electronic equipment from transient overvoltages.
• Renewable energy installations requiring surge protection.
• Infrastructure and utility power distribution networks.

Common Search Terms

surge protection device, SPD Type 1+2, 3+1 circuit SPD, 275Vac surge protector, pluggable SPD module, industrial surge protection, DIN rail SPD, IEC 61643-11 compliant SPD, three-phase surge protector, power line SPD