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Surge currents for extension leads

What does the surge current mean in the case of extension leads with overvoltage protection?

Power strips with surge protection can reduce surges so that connected devices are not damaged. The maximum surge current for extension leads with surge protection indicates how much current can be discharged without destroying the protective device itself.

The higher the value, the greater an overvoltage in the power supply system may be without destroying the protective devices, or the higher the surge current, the more smaller overvoltage peaks the extension leads with surge protection can absorb without sustaining damage.

How high must the surge protection be?

How high the number of maximum surge currents should be depends on what kind of devices are to be protected.

If it concerns devices that were particularly expensive to purchase and whose destruction would cause damage, it is worthwhile to resort to a surge protection product with a high number of total leakage currents or a high maximum sum of surge currents.

How much surge protection is needed for different electrical devices?

  • High-end devices are particularly expensive and increasingly powerful, but they also react more sensitively to surges. We recommend surge protection socket strips with a max. leakage current of up to 120,000 A for high-end or for products that represent a high monetary or non-material value. 
  • For sophisticated electrical appliances such as game consoles or charging stations, we recommend surge protection socket strips with a max. leakage current of 19,500 A.
  • For standard electrical appliances such as coffee makers, kettles or blenders, we recommend surge protection socket strips with a maximum leakage current of 13,500 A.

Surge currents for socket strips with surge protection - brennenstuhl®

For high-end product and products that represent a monetary or non-material value for you, we recommend overvoltage protection extension leads with a max. surge current of 30,000 A to 120,000 A. High-end devices are especially expensive and are always more efficient; however, they thus also react more sensitively to overvoltages.

For sophisticated electric appliances such as games consoles or charging stations, we recommend overvoltage protection extension leads with a max. surge current of 19,500 A.

For standard electric appliances such as coffee machines, kettles and mixers, we recommend overvoltage protection extension leads with a max. surge current of 13,500 A.

In the case of electric appliances that are particularly important to you, we recommend supplying them with a higher surge current.

Steckdosenleisten mit Überspannungsschutz


Surge protection with a total leakage current of up to 120,000 A for high-end devices, gaming setup, home cinema, etc.

For electrical devices that are of monetary or sentimental value to you, the use of high-quality surge protection extension leads is recommended.

High-end devices are often very expensive to purchase. On the other hand, the devices are very powerful, but also react more sensitively to disturbances in the mains, such as overvoltages. That is why brennenstuhl® recommends surge protection with a maximum sum of surge currents of up to 120,000 A for high-end devices that are often also expensive to purchase.


Surge protection for advanced electrical appliances such as game consoles, screens, TVs, routers

For sophisticated electrical devices such as game consoles, routers or charging stations, we recommend surge protection extension leads with a maximum sum of surge currents of 19,500 A.


Surge protection for everyday electrical appliances such as coffee machines, blenders, printers, lamps, etc.

For standard electrical devices such as coffee makers, kettles or blenders, we recommend surge protection extension leads with a maximum total surge current of 13,500 A.