Modular surge protector 4P | 20kA | 275V | II/T2/C | DIN | Promfactor Baltic MOP4-C275/20

Technical Specifications:
Complies with standards: IEC/EN 61643-11
Class according to IEC/EN/VDE: II / T2 / C
Continuous operating voltage (Uc): ~275 V AC
Nominal voltage (Uo): ~230 V AC
Temporary overvoltage (TOV): 335 V / 5 s (withstands); 440 V / 120 min (withstands)
Number of poles: 4
Nominal discharge current (In): 20 kA (8/20 μs)
Maximum discharge current (Imax): 40 kA (8/20 μs)
Nominal frequency: 50/60 Hz
Protection level (Up): <1.8 kV (at In)
Response time (tA): <25 ns
Leakage current at Uc: <0.2 mA
Screw tightening torque: 3.0 Nm
Required fuse if main fuse >125 A: 125 A gG
Disconnection capability (Isccr): 25 kA / 50 Hz
Permissible cable cross-section: up to 35 mm²
Protection rating: IP20
Mounting: 35 x 7.5 mm DIN rail
Housing material: Thermoplastic UL 94 V-0 (non-flammable)
Operating temperature: -40…+70 °C
Storage temperature: -25…+70 °C
Functions:
Protects electrical networks from surges caused by lightning or grid disturbances
Fast response (<25 ns) ensures effective voltage surge absorption
Suitable for three-phase and single-phase systems (4P configuration)
High nominal discharge current – 20 kA, with a maximum of 40 kA
Easy installation on DIN rail (35 x 7.5 mm)
Can be used in residential, commercial, and industrial applications
Applications:
Residential electrical installations – protection against lightning and power surges
Commercial buildings – offices, shopping centers, hotels, where sensitive electronics and wiring need protection
Industrial sites – factories, warehouses, substations, where voltage spikes can cause major damage
IT infrastructure – server rooms, data centers, telecom nodes, where surge protection is critical
Pros:
High surge protection – nominal 20 kA, maximum 40 kA discharge current
Fast response time (<25 ns) – ensures reliable voltage surge absorption
Wide operating temperature range (-40…+70°C) – suitable for various climate conditions
Compatible with different electrical systems (three-phase and single-phase configurations)
Convenient installation on a standard DIN rail (35 x 7.5 mm)
Made of flame-retardant thermoplastic material (UL 94 V-0)
Cons:
IP20 protection class – not resistant to dust or moisture, must be installed in an electrical panel
Cannot operate without additional fuses if the main fuse >125 A
The Promfactor Baltic MOP4-C275/20 is a reliable Class II surge arrester suitable for protecting residential, commercial, and industrial buildings from surges. Its high nominal discharge current (20 kA) and maximum discharge current (40 kA) ensure effective protection, while its fast response time (<25 ns) prevents voltage spikes from damaging electrical equipment.

It is easy to install on a DIN rail (35 x 7.5 mm) and is made of non-flammable thermoplastic material. However, due to its IP20 protection rating, it must be installed inside a closed electrical panel.