MBD1-B series surge protective device (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 has two protection modes: MC and MD
SPD is in compliance with GB18802.1/IEC61643-1 standards.

Meba surge arrestors MBD1-B100

Technical Parameter

Operation Elements

In three phases and four wires system, all three phase lines and one neutral line to earthing line have SPD to be protected, in normal service, the SPD is at the state of high resistance, when network produce surging over-voltage due to thunder or other reasons, SPD will be conductive within short time (ns), lead surging voltage into ground, consequently to protect the electric appliances of network. After surging voltage passed by SPD, and disappeared, SPD recover in high resistance. It will not have influence on the normal service of network.

– The SPD need not to be adjusted after in-stalled according to requirement.
– It can automatically protect the power net-work after proper installation.
– On services it need periodically check if SPD is invalid or not, meanwhile check red indicator of fuse lighting or not, please replace the invalid element on time.

Model and Signification

Technical Parameter

Model and specification MBD1-B60 MBD1-B80 MBD1-B100
Maxi continuous operating voltage 750 420 385 275 420 385 320 275 420 385 320 275
Voltage protective level 3.5 2.2 2.0 1.6 2.5 2.3 2.0 1.8 3.0 3.0 2.5 2
Maxi discharging current 60 80 100
Nominal discharging current 30 40 60
Response time <25
Protection grade IP20
Indication of invalidation Aging invalidation: white: Normal, red: invalidation
Application Primary protection for in line
Remote signal Function Can also picking
Remarks Other maxi continuous operating voltage Can be customize

Principle Diagrams

Outside Size Fig



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