Serviceline Industrial Sensors
Serviceline Explosion Protection

Surge Protection Barrier K-LB-2.6G

  • 2-channel
  • Mounting on DIN mounting rail
  • For intrinsically safe or non-intrinsically safe 6 V applications
  • Protects field or control circuit inputs
  • Max. surge current (8/20 µs) 20 kA
  • Uninterruptable operation (auto reset)
  • Up to SIL 3 acc. to IEC/EN 61508

Please note: All product-related documents, such as certificates, declarations of conformity, etc., which were issued prior to the conversion under the name Pepperl+Fuchs GmbH or Pepperl+Fuchs AG, also apply to Pepperl+Fuchs SE.

Download the complete datasheet as a PDF:

Datasheet excerpt: Technical data of  K-LB-2.6G

General specifications
Number of protected signal lines4
Functional safety related parameters
Safety Integrity Level (SIL)SIL 3
Electrical specifications
Connectionprotected area: terminals 5, 6; 7, 8
unprotected area: terminals 1, 2; 3, 4
Rated current250 mA
Leakage current< 10 µA at 1 V and 25 °C (77 °F) , line-line
Nominal voltage1 V DC
Maximum continuous operating voltage6 V DC
Series resistance< 0.5 Ω per line
Impulse rating10 kV/5 kA (category C2)
2 kV/2 kA (category D1)
Impulse discharge current (10/350 µs)2 kA per line (2x)
Nominal discharge current (8/20 µs)5 kA per line (10x)
Rated surge current (8/20 µs)10 kA per line (1x)
Total discharge current (8/20 µs)20 kA (1x)
Voltage protection levelmax. 90 V line-line for nominal discharge current In
max. 25 V line-earth for nominal discharge current In
Impulse reset time< 30 ms
Insertion loss≤ 0.05 dB, at 0 ... 4 kHz, in 600 Ω-System
≤ 3 dB, at 0 ... 174 kHz, in 100 Ω-System
Labelingspace for labeling at the front
Degree of protectionIEC 60529:2013
Surge protective devices for low voltageEN 61643-21:2001+A1:2009+A2:2013
IEC 61643-21:2001+A1:2008+A2:2012
Operating conditions
Installation conditions
Mounting locationindoor
Ambient conditions
Ambient temperature-30 ... 80 °C (-22 ... 176 °F)
For usage in hazardous area observe the EC-type examination certificate.
Relative humidity5 ... 95 %
Mechanical specifications
Degree of protectionIP20
Connectionscrew terminals
Core cross section2 x 2.5 mm2
Massapprox. 100 g
Dimensions12.5 x 115 x 116 mm (0.5 x 4.5 x 4.6 inch) (W x H x D)
Height115 mm
Width12.5 mm
Depth116 mm
Mountingon 35 mm DIN mounting rail acc. to EN 60715:2001
Data for application in connection with hazardous areas
EU-type examination certificatePTB 00 ATEX 2176 X
MarkingEx-Hexagon II 2(1)G Ex ia IIC T6/T5/T4
Temperature classT6 for ambient temperature ≤ 50 °C
T5 for ambient temperature ≤ 70 °C
T4 for ambient temperature ≤ 80 °C
Voltage6 V
Current250 mA
Internal capacitancenegligible
Internal inductance200 µH
CertificatePF 16 CERT 4065 X
MarkingEx-Hexagon II (3)D [Ex ic Dc] IIIC
Directive conformity
Directive 2014/34/EUEN 60079-0:2012+A11:2013 , EN 60079-11:2012
International approvals
CSA approval
Control drawing116-0187 (cCSAus)
IECEx approval
IECEx certificateIECEx BAS 14.0010X
General information
Supplementary informationObserve the certificates, declarations of conformity, instruction manuals, and manuals where applicable. For information see


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

Details: K-LB-2.6G


The device limits induced transients of different causes, e. g. lightning or switching operations. The limitation is achieved by diverting the current to earth and limiting the signal loop voltage during the duration of the overvoltage pulse.

The device is HART transparent.

The device is mounted on a 35 mm DIN mounting rail according to EN 60715.

Always connect the device to high-quality ground connections. The device must have the same potential as the devices it protects. Install the ground system in accordance with the applicable regulations.

Product Documentation: K-LB-2.6G

Language Selection:
Brief InstructionsLanguageFile TypeFile Size
Brief Instructions - Surge Protection BarriersENGPDF876 KB
Safety and Security Documentation
Instruction manualENGPDF161 KB
ManualENGPDF2244 KB
Manual Surge Protection BarriersENGPDF1151 KB

Design / Simulation: K-LB-2.6G

Language Selection:
CADLanguageFile TypeFile Size
CAD Portal / CAD PortalALLLINK---

Approvals: K-LB-2.6G

Language Selection:
CertificatesCertificate No.LanguageFile TypeFile Size
Baseefa IECEx Certificate of ConformityIECEx BAS 14.0010XALLLINK---
Canada, USA CSACoC 1128189ALLPDF62 KB
China SITIIAS CCC Ex Certificate2020322304002602 (Bintan)ALLPDF1100 KB
Europe PTB ATEX Category (1) 2PTB 00 ATEX 2176XALLPDF946 KB
Europe Pepperl+Fuchs ATEX Category (3) DPF 16 CERT 4065 XALLPDF601 KB
India PESO (India) CCOEA/P/HQ/KA/104/5871 (P507630)ALLPDF101 KB
exida Functional Safety AssessmentP+F 11-10-085 R036 V1R0ALLPDF477 KB
Control Drawings
Control drawing CSA / Control drawing CSA   ALLPDF179 KB
Declaration of Conformity
EU Declaration of Conformity (P+F) / EU-Konformitäterklärung (P+F)DOC-0968CALLPDF92 KB

Associated Products: K-LB-2.6G

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