Surge Protection Device (SPD) with switch | 1P | 400V AC | 20kA | T1+T2 class | DIN mounting | for solar systems and electrical distribution boards

Technical Specifications

Type: Surge Protective Device (SPD)
Protection class: T1 + T2
Number of poles: 1P
Rated voltage: 400V AC
Nominal discharge current (In): 20 kA
Maximum discharge current (Imax): 20 kA
Application: Solar systems, distribution boards, automation
Material: High-quality plastic

Functions

Dual protection (T1 + T2) – protects against both direct lightning impulses and residual overvoltages
Integrated switch – allows safe disconnection of the device during maintenance
Fast response – instantly diverts dangerous voltage to ground
Reliable operation – stable even in demanding operating conditions
Universal application – suitable for both residential and industrial solutions

Usage

Residential user: Protects household appliances (TVs, heating boilers, inverters), especially relevant for homes with solar power systems
Electrician: Quick and convenient installation, universal solution for various projects, reliable protection for the client = fewer warranty issues
Engineer / designer: T1+T2 solution reduces the need for additional components, suitable for energy distribution and automation systems, easy integration into projects according to standard requirements

Practical Application

Homes: Installed in electrical panels. Protects inverters, boilers, household appliances. Especially relevant with solar systems
Solar power plants: Installed on the AC side (after the inverter), protects the inverter from lightning and grid surges
Industry / automation: In control cabinets (PLC, relays, controllers). Protects against failures and downtime
Offices / commercial: In server rooms, distribution boards. Protects computers, cash registers, IT equipment
Farms: Ventilation, pumps, automation. Protection against unstable grid and lightning

Advantages

Combined T1 + T2 protection
Integrated switch – easy maintenance
Suitable for solar systems
Compact solution (saves space in the panel)
Effective protection against lightning and grid surges

Disadvantages

Proper grounding is required for effective operation

Is this SPD suitable for a solar power system?

Yes, it is suitable for installation on the AC side to protect the inverter and other equipment.

What is the difference between T1 and T2 protection?

T1 – protects against strong lightning impulses
T2 – protects against residual, lower overvoltages
This model includes both in one device.

Can it be used at home?

Yes, it is an excellent solution for residential homes, especially with sensitive electronics.

Is grounding required?

Yes, proper grounding is essential, otherwise the SPD will not function effectively.