A surge protector like this one manufactured by the reputable brand Mora is an appliance or device designed to protect electrical devices from voltage spikes as well as current spikes. A surge protector attempts to limit the voltage supplied to an electric device by either blocking or shorting to ground any unwanted voltages above a safe threshold.

Specifications 

1. Rated working current: 40A 
2. Overvoltage protection value: AC 230V – AC 275V ; Factory default 275V
3. Undervoltage protection value: AC 160V – AC 220V; Factory default 175V
4. Automatic closing delay: 0-30 seconds; Factory default 30 seconds
5. Over-current protection value: 0-40A; Factory default 40A
6. Display range of effective voltage 70-400V
7. Display range of effective current 0-99.9A
8. Withstand lightning surge voltage in the range of 5kV
9. 8 modular contour design and guide-rail mounting
10. Rated working voltage: AC 230V, 50Hz
11. Maximum short circuit withstand current: 3000A below 40A, 4500A above 50A (action time 10ms)
12. Action time: 0-30 seconds; Factory default 30 seconds
13. Own power consumption <1.5 watt
14. Motor Mechanical life: > 100,000 times
15. Dimensions: 80 x 37 x 66 mm (L x W xH)
16. Ambient temperature = standard
17. Working environment temperature range: -25 C ~ 55 C
18. Relative humidity: 45 – 90% RH: 40 C
19. Latitude: <2000m
20. Pollution level: 2 class

Package includes:

• 1x  Surge VA-protector