Meba surge supressor MBD3-40(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. As per the conditions of IEC61643-1:1998-02 standard, Class I surge protective device, it is category B surge protective device.
SPD meets with GB18802.1/IEC61643-1 standards.

Meba surge supressor MBD3-40

Technical Parameter

Operation Elements
Single pole structure, single pole or three poles combined SPD available.
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. It can adopt Kelvin wiring mode. Large current carrying capacity, fast response time, low residual voltage.

– Category B surge protective device (SPD), used in the connection between equal potential electrodes while thunder occur.
– To be mounted: between LPZ0A or LPZ0B zone and LPZ1 zone, adopts 35mm standard mounting rail. The cross sectional area of multi-strand soft copper conductor: 2.5 – 35mm2.
– Generally to be installed in low voltage main incoming distribution panel, overhead incoming.
– As required, the user can assemble single pole or three poles surge protective device freely.
– Generally to be installed in low voltage main incoming distribution panel, earthing wire shall be dual color multi-strand soft copper conductor more than 16 mm2

Model and Signification

Technical Parameter

Model and specification MBD3-15 MBD3-40 MBD3-65 MBD3-80 MBD3-100 MBD3-120
Maxi continuous operating voltage 420 275 420 275 420 275 420 275 420 275 420 275
Voltage protective level 1.2 1.0 1.8 1.5 2.5 1.5 2.5 1.8 2.8 2.0 3.0 2.0
Maxi discharging current 15 45 65 80 100 120
Nominal discharging current 5 15 30 40 50 60
Response time <25
Indication of invalidation Aging invalidation: white: Normal, red: invalidation
Protection grade IP20
Application Protection for in line

Outside Size Fig


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