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K1-3P320 Mersen Surge Protector Type 1+2 SPD 3 Pole 480 Volt 20KA TNC
Mersen K1-3P320 Type 1+2 surge protection device with 320 V AC operating voltage, 12.5 kA lightning impulse current and pluggable DIN rail design for TNC 277/480 V three-phase electrical systems.
£200.72
Why Choose the Mersen 44120304 K1-3P320 Surge Protection Device?
The Mersen 44120304 K1-3P320 is a premium Type 1+2 Surge Protection Device (SPD) engineered to protect three-phase low-voltage electrical installations against lightning strikes and transient overvoltages. As part of the trusted Mersen Surge-Trap® K - K1 Series, this pluggable surge protector delivers dependable first-line protection for industrial, commercial and infrastructure applications requiring continuous electrical system reliability.
Designed for installation within the main distribution board, the K1-3P320 combines a compact DIN rail mounted design with high surge handling capability. Its pluggable construction enables quick replacement during maintenance, helping minimise downtime whilst ensuring valuable equipment remains protected from damaging surge events.
With a 320 V AC maximum continuous operating voltage (Uc), 3+0 protection configuration and a 12.5 kA lightning impulse current (Iimp), the K1-3P320 is specifically designed for TNC 277/480 V AC three-phase electrical systems, providing reliable protection against both direct lightning strikes and switching transients.
Key Advantages
- Reliable Type 1+2 surge protection for three-phase electrical installations.
- 320 V AC operating voltage for 277/480 V power distribution systems.
- Pluggable cartridge design enables fast servicing and replacement.
- Designed specifically for TNC network configurations.
- Compact DIN rail mounted housing saves valuable enclosure space.
- Protects critical electrical equipment against lightning and transient overvoltages.
Key Features
- Mersen Surge-Trap® K - K1 Series.
- IEC Class I+II / Type 1+2 surge protection device.
- 320 V AC maximum continuous operating voltage (Uc).
- 12.5 kA lightning impulse current (Iimp).
- 20 kA nominal discharge current (In).
- 50 kA maximum discharge current (Imax).
- 3-pole, 3+0 protection configuration.
- Visual end-of-life status indicator.
- Compact pluggable DIN rail mounted construction.
Reliable Protection Against Electrical Surges
The Mersen K1-3P320 safely diverts high-energy surge currents away from connected electrical equipment before they can damage motors, drives, switchgear and sensitive electronic control systems. This helps minimise downtime, reduce maintenance costs and improve the long-term reliability of electrical installations.
Its high surge current capacity, compact footprint and pluggable construction make it an excellent choice for industrial automation, manufacturing facilities, commercial buildings and critical infrastructure where dependable surge protection is essential.
Typical Applications
- Main three-phase distribution boards.
- Industrial control panels.
- Commercial buildings.
- Manufacturing plants.
- Infrastructure projects.
- Electrical switchboards.
- Data centres.
- 277/480 V three-phase power distribution systems.
Technical Specifications
Tick the specs you need, then view products that match.
| Impulse Current Iimp (kA) | 12.5 kA | |
|---|---|---|
| SPD Type | Type 1+2 | |
| Voltage | 480 V | |
| Phase | Three Phase | |
| Poles | 3-pole | |
| Device Type | Surge protection device | |
| Earthing System | TN-C | |
| Nominal Discharge Current (In) | 20 kA | |
| Remote Signal | No | |
| Manufacturer | Mersen | |
| Series | Surge-Trap® K - K1 Series | |
| Model | K1-3P320 | |
| Part Number | 44120304 | |
| Product type | Type 1+2 Surge Protection Device (SPD) | |
| IEC SPD Type | Class I+II | |
| UL SPD Type | Type 1 Component Assembly | |
| Maximum continuous operating voltage (Uc) | 320 V AC | |
| Nominal operating voltage (Un) | 277/480 V AC | |
| Lightning impulse current (Iimp) | 12.5 kA | |
| Nominal Discharge Current (In) | 20 kA | |
| Maximum discharge current (Imax) | 50 kA | |
| Configuration | TN-C | |
| Number of poles | 3 | |
| System compatibility | TN-C | |
| Protection level (Up) | ≤1.5 kV | |
| Mounting type | DIN rail | |
| Format | Pluggable | |
| Protection rating | IP20 | |
| Dimensions (H × W × D) | Approx. 90 × 54 × 90 mm | |
| Weight | Approx. 0.48 kg |
Frequently Asked Questions
What is the Mersen 44120304 K1-3P320 used for?
It provides Type 1+2 surge protection for three-phase low-voltage electrical installations against lightning strikes and transient overvoltages.
Which electrical systems is this SPD suitable for?
The K1-3P320 is designed for TNC 277/480 V AC three-phase electrical distribution systems.
What is the maximum continuous operating voltage?
The device has a maximum continuous operating voltage (Uc) of 320 V AC.
What surge current ratings does the device provide?
The SPD features a 12.5 kA lightning impulse current, 20 kA nominal discharge current and 50 kA maximum discharge current.
How is the surge protection device installed?
The K1-3P320 is supplied in a pluggable housing for installation onto a standard DIN rail inside a main electrical distribution board.
Trusted Protection for Three-Phase Electrical Installations
Mersen Surge-Trap® K Series surge protection devices are trusted by electrical engineers worldwide for protecting three-phase power distribution systems against lightning strikes and transient overvoltages.
