Pepperl+Fuchs M-LB-2144
Surge Protection Barrier

Pepperl+Fuchs M-LB-2144
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  • Surge protection barrier for 2 signal lines
  • Nominal voltage 24 V DC
  • Surge protection barrier for grounded signal lines
  • Max. surge current (8/20 ?µs) 20 kA
  • Connection via screw terminals
  • DIN rail mountable
  • Up to SIL 3 acc. to IEC/EN 61508
Item Number: M-LB-2144
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Number of protected signal lines2
Topologygrounded
Safety Integrity Level (SIL)SIL 3
Connectionprotected area: terminals 4, 5
unprotected area: terminals 2, 3
shielding/grounding: terminal 1 (optional)
Rated current500 mA , restrictions see derating tables
UL : 400 mA , restrictions see derating tables
Leakage current< 6 ?µA at 24 V and 25 ?°C (77 ?°F) , line-line
Nominal voltage24 V DC
Maximum continuous operating voltage30 V DC
Series resistance?‰¦ 3 Ω per line
Impulse rating1 kV/0.5 kA (category C1)
10 kV/5 kA (category C2)
1 kA (category D1)
Impulse discharge current (10/350 ?µs)1 kA per line (2x)
Nominal discharge current (8/20 ?µs)5 kA per line (10x)
Total discharge current (8/20 ?µs)20 kA (1x) , overstressed fault mode 3 acc. to IEC 61643-21
Voltage protection levelmax. 45 V line-line for nominal discharge current In
max. 60 V line-earth for nominal discharge current In
Impulse reset time< 500 ms
Insertion loss?‰¦ 3 dB at 0 ... 700 kHz in 100 Ω system
Electromagnetic compatibilityEN 61326-3-1:2017
Degree of protectionIEC 60529:2013
Functional safetyIEC/EN 61508:2010
Surge protective devices for low voltageIEC 61643-21:2000+A1:2008+A2:2012
Ambient temperature-40 ... 80 ?°C (-40 ... 176 ?°F)
Observe the temperature range limited by derating, see section derating.
Storage temperature-40 ... 85 ?°C (-40 ... 185 ?°F)
Relative humiditymax. 95 % , without condensation
Corrosion resistanceacc. to ISA-S71.04, severity level G3
Degree of protectionIP20 , after mounting of the insulation spacer
Connectionscrew terminals , max. core cross section 1 x 2.5 mm2
MaterialPolyamide (PA)
Massapprox. 32 g
Dimensions6.2 x 93 x 72.4 mm (0.24 x 3.7 x 2.8 inch) (W x H x D)
Mountingon 35 mm DIN mounting rail acc. to EN 60715:2001
CertificateKIWA 19 ATEX 0002 X
MarkingII 3G Ex ec IIC T6...T4 Gc
Temperature classT6, T5 or T4 , restrictions see derating tables
Directive conformity
Directive 2014/34/EUEN IEC 60079-0:2018+AC:2020 , EN 60079-7:2015+A1:2018
UL approvalE501704
E501881
Breakdown voltage30 ... 45 V line-line at 100 V/s acc. to UL 497B
30 ... 45 V line-earth at 100 V/s acc. to UL 497B
< 1000 V at 100 V/?µs acc. to UL 497B
IECEx approval
IECEx certificateIECEx KIWA 19.0002X
IECEx markingEx ec IIC T6...T4 Gc
Supplementary informationObserve the certificates, declarations of conformity, instruction manuals, and manuals where applicable. For information see www.pepperl-fuchs.com.
ECLASS 13.027171202
ECLASS 12.027171202
ECLASS 11.027130805
ECLASS 10.0.127130805
ECLASS 9.027130805
ECLASS 8.027130805
ECLASS 5.127130801
ETIM 9.0EC000941
ETIM 8.0EC000941
ETIM 7.0EC000941
ETIM 6.0EC000941
ETIM 5.0EC000941
UNSPSC 12.139121610

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