Serviceline Industrial Sensors
Serviceline Explosion Protection

Surge Protection Barrier M-LB-2.255.T3.D

  • Surge protection for 2 supply lines
  • Type 3 acc. to EN 61643-11
  • Nominal voltage 230 V AC
  • Pre-wired unit
  • Operating state and fault indication of every protected line
  • Fault indication output
  • DIN rail mountable

Download the complete datasheet as a PDF:

Datasheet excerpt: Technical data of M-LB-2.255.T3.D

General specifications
Device typetype 3 acc. to EN 61643-11:2013
class III acc. to IEC 61643-1:2011
Number of protected supply lines2
Suitable componentsprotection module M-LB-2.255.T3.M
Electrical specifications
Nominal voltage230 V AC
Maximum continuous operating voltagemax. 255 V AC
Temporary over-voltage335 V 335 V/5 s (TOV withstand) (L-N)
400 V/5 s (TOV withstand) (L/N-PE)
1200 V+Ucs/200 ms (TOV safe failure) (L+N-PE) 5 s (TOV withstand)
Nominal discharge current (8/20 µs)3 kA
Max. surge current (8/20 µs)5 kA
Voltage protection levelmax. 1.25 kV (L-N)
max. 1.5 kV (L/N-PE)
Reaction timemax. 25 ns (L-N)
max. 100 ns (L/N-PE)
Short-circuit-proof6 kA eff at max. mains-side overcurrent protection
Overcurrent protectionmax. 25 A gL/gG (B 25 A) , mains-side
Fault indication output
Connectionterminals 11, 12, 14
Outputvolt-free change-over contact
Switch powerAC: 250 V / 0.5 A
DC: 250 V/0.1 A; 125 V/0.2 A; 75 V/0.5 A; 24 V/0.5 A
Display elementsstatus display
operating state (green)
fault indication (red)
Directive conformity
Low voltage
Directive 2014/35/EUEN 61643-11:2012
Degree of protectionIEC 60529:2013
Shock resistanceEN 60068-2:2010
Vibration resistanceEN 60068-2:2010
Operating conditions
Installation conditions
Mounting locationindoor
Ambient conditions
Ambient temperature-40 ... 80 °C (-40 ... 176 °F)
Relative humidity5 ... 95 %
Mechanical specifications
Degree of protectionIP20
Core cross-section- min. 1.5 mm2 solid/flexible
- max. 35 mm2 stranded/25 mm2 flexible
- max. 1.5 mm2 solid/flexible (for remote signalling contact)
Housingthermoplastic, color grey , UL 94 V-0
Massapprox. 120 g
Dimensions18 x 90 x 73 mm (0.7 x 3.6 x 2.9 inch) (1 TE acc. to DIN 43880)
Mountingon 35 mm DIN mounting rail acc. to EN 60715:2001
General information
Supplementary informationObserve the certificates, declarations of conformity, instruction manuals, and manuals where applicable. For information see

Documents: M-LB-2.255.T3.D

Instruction leafletsLanguageFile TypeFile Size
Operating instructions M-LB-2.***.T3.* / Betriebsanleitung M-LB-2.***.T3.*ALLPDF371 KB

Approvals+Certificates: M-LB-2.255.T3.D

Statements of complianceCertificate No.File TypeFile Size
EU-Declaration of conformity / EU-KonformitätserklärungDOC-2133APDF50 KB
Canada UL Surge Protective Device cULE346845 cUL (VZCA8)LINK---
Europe DEKRA Surge Protective DeviceKEMA 2172593.02PDF234 KB
USA UL Surge Protective Device ULE346845 UL (VZCA2)LINK---