Meba lightning protection MBD4-40 (hereinafter called SPD)   is suitably used in the IT, TT, TN-C, TN-S, TN-C-S and etc power supply system of AC 50/60Hz, rated voltage up to 380V, to protect from direct and indirect lightning impulse and other transient over voltage.SPD meets with GB18802.1/IEC61643-1 standard.

Operation Elements
SPD as only one side of terminals, able to prevent from being electric touching, indoor fixedly mounted, limiting voltage. SPD has built-in disconnector, when SPD is invalid due to overheating or breakdown, the disconnector can automatically separate SPD from the network, meanwhile send an indication signal. The visible window show white color in normal service, if to be separated from network, it will show red color. Fast response time, low residual voltage.

Meba lightning protection MBD4-40

– To be mounted in joint of LPZ1 or LPZ2 zone, adopts 35mm standard mounting rail. The cross sectional area of multi-strand soft copper conductor: 2.5 – 35 mm2.
– Every pole of SPD shall be protected by fuse or mini circuit breaker.

The Contact
SPD can provide the NO contact for remote communication, if one or more modules of SPD is invalid, the NO and NC contact will be closed and send fault information.

Model and Signification

Technical Parameter

Model and specification MBD4-20 MBD4-40
Maxi continuous operating voltage 420 275 420 275
Voltage protective level 1.8 1.2 2.0 1.5
Maxi discharging current 20 40
Nominal discharging current 10 20
Response time <25
Protection grade IP20
Indication of invalidation Aging invalidation: white: Normal, red: invalidation
Application Protection for in line
Remote signal Function Can also picking
Remarks Other maxi continuous working voltage Uc (AC) can be supplied if required.

Outside Size Fig


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