K1-4P320-M Mersen Surge Protector Type 1+2 SPD 4 Pole 277/480 Volt 20KA TNS Remote Indication

Why Choose the SPD T1+2, 4+0, Uc 320Vac, M K1-4P320-M?

The M K1-4P320-M surge protective device delivers robust combined Type 1 and Type 2 protection, ensuring reliable safeguarding of industrial and commercial electrical systems against transient overvoltages and lightning strikes. Its 4+0 configuration supports comprehensive three-phase and neutral line protection, making it ideal for critical installations with demanding operational environments.

Rated for continuous operation at up to 320V AC (Uc), this device offers high discharge capacity and rapid response time to maximise equipment uptime and minimise downtime. The modular design ensures straightforward installation, maintenance, and scalability for evolving system requirements.

Technical Specifications

• Item number: 44120413
• Catalogue No: K1-4P320-M
• Description: SPD, T1+2, 4+0, Uc 320Vac, M
• EAN/UPC Code: 8435297888246
• RoHS Compliant: Yes
• IEC SPD Type: Class I+II
• UL SPD Type: Type 1 Component Assembly
• Format: Pluggable
• Nominal Operating Volt Rating (Un): 277/480
• AC or DC: AC
• Nominal Discharge Current (In) (8/20): 20 kA
• Max Discharge Current : Imax (8/20): 50 kA
• Protection Modes: L-PE / N-PE
• System Configuration: TNS
• Lightning Impulse Current (10/350) (LIMP): 12.5 kA
• 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
• MOV Response Time: ≤25
• Installation Mounting: DIN rail
• MCOV L-G: 320 V
• MCOV L-L: 640 V
• MCOV N-G: 320 V
• MCOV L-N: 320 V
• VPR L-G: 1200 V
• VPR L-L: 2000 V
• VPR N-G: 1200 V
• VPR L-N: 2000 V
• Replacement Plug L1: 44120003
• Product Width: 72 mm
• Product Length: 90.4 mm
• Product Height: 90 mm
• Sell Pack Quantity: 1 EA
• Sell Pack Weight: 0.691 kg
• Sell Pack Width: 78 mm
• Sell Pack Length: 97 mm
• Sell Pack Height: 118 mm
• Product group: Power Line SPDs
• Product Weight: 0.66 kg

Product Code: 44120413

Key Benefits

• Combined Type 1 and Type 2 protection for enhanced surge defence.
• 4+0 pole configuration ensures comprehensive three-phase and neutral protection.
• High nominal discharge current of 20 kA with maximum discharge capacity of 50 kA.
• Rapid MOV response time (≤25 ns) minimises transient damage.
• Visual and microswitch indication system for easy status monitoring and maintenance.
• Modular, pluggable design facilitates quick installation and replacement.
• Robust housing materials (PA6 CT1 & PA66 CT1) ensure durability in harsh environments.
• Suitable for DIN rail mounting to fit standard industrial electrical panels.

Compatibility

This SPD is designed for use in TN-S electrical systems with nominal operating voltages of 277/480 V AC. It is compatible with industrial and commercial power distribution boards requiring Type 1+2 surge protection and supports up to 4-pole configurations. The device requires a maximum back-up fuse of 315 A [gG] and can be integrated with replacement plugs such as model 44120003 for maintenance.

Applications

• Industrial power distribution panels
• Commercial building electrical systems
• Critical infrastructure requiring surge protection
• Renewable energy installations
• Data centres and server rooms
• Manufacturing plants and factories

Common Search Terms

surge protective device, SPD Type 1+2, 4 pole SPD, 320V AC surge protector, industrial surge protection, DIN rail SPD, combined surge arrester, power line SPD, lightning surge protector, M K1-4P320-M