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

Why Choose the M K1-4PG275-M SPD?

The M K1-4PG275-M is a combined Type 1+2 surge protective device (SPD) designed for robust protection of three-phase TN-C systems. Featuring a nominal voltage of 275V AC, it delivers effective defence against transient overvoltages, including direct and indirect lightning strikes.

This 3+1 configuration provides comprehensive coverage for three-phase and neutral conductors, ensuring operational safety and continuity of sensitive industrial and commercial electrical installations. Engineered for reliability and ease of maintenance, it meets rigorous standards for surge protection, making it an ideal choice for demanding environments.

Technical Specifications

• Item number: 44120401
• Catalogue No: K1-4PG275-M
• Description: SPD, T1+2, 3+1, Uc 275Vac, M
• EAN/UPC Code: 8435297884064
• 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) Microswitch
• 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: 0.658 kg
• Sell Pack Width: 78 mm
• Sell Pack Length: 97 mm
• Sell Pack Height: 118 mm
• Product group: Power Line SPDs
• Product Weight: 0.614 kg

Product Code: 44120401

Key Benefits

• Comprehensive surge protection for three-phase TN-C systems with 3+1 pole configuration.
• Combined Type 1+2 SPD ensures protection against both direct and indirect lightning strikes.
• Pluggable format allows for easy installation and maintenance.
• Visual indication system with green OK/not green replace microswitch for status monitoring.
• High nominal discharge current (20 kA) and maximum discharge current (50 kA) for robust protection.
• Compatible with TT and TNS system configurations.
• Durable housing materials (PA6 CT1 & PA66 CT1) ensure long service life.

Compatibility

The M K1-4PG275-M SPD is compatible with three-phase TN-C electrical systems operating at nominal voltages of 230/400 V AC. It supports TT and TNS system configurations and can be integrated into installations requiring DIN rail mounting. Suitable for use with backup fuses up to 315 A [gG]. Replacement plugs are available for N-PE (44120000) and L-N (44120001) connections.

Applications

• Industrial and commercial electrical installations requiring surge protection.
• Protection of sensitive equipment in three-phase TN-C power distribution systems.
• Facilities exposed to frequent transient overvoltages or lightning strikes.
• Electrical panels with DIN rail mounting for easy integration.
• Systems requiring compliance with IEC Class I+II and UL Type 1 SPD standards.

Common Search Terms

Surge Protective Device, SPD, Type 1+2 SPD, 3+1 Pole SPD, Three-phase surge protector, DIN rail SPD, Lightning surge protection, Industrial surge protection, TN-C system SPD, Combined SPD, Pluggable surge protector