Serviceline Industrial Sensors
Serviceline Explosion Protection

Surge Protection Barrier P-LB-1.C.123

  • 1-channel
  • Plugs directly in to field side of KF modules
  • Analog or digital signal inputs
  • Surge protection up to 10 kA
  • Protects leads 1, 2 and 3 of KF modules
  • 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  P-LB-1.C.123

General specifications
Number of protected signal lines3
Functional safety related parameters
Safety Integrity Level (SIL)SIL 3
Signal lines
Connectionterminals 1, 2, 3
Rated voltagemax. 30 V
Rated currentmax. 250 mA
Leakage currentmax. 5 µA
On-state voltagemax. 45 V
Ground insulationmax. 500 V breakdown voltage
Degree of protectionIEC 60529:2001
Ambient conditions
Ambient temperature-20 ... 60 °C (-4 ... 140 °F)
Mechanical specifications
Degree of protectionIP20
Massapprox. 70 g
Dimensions20 x 62 x 115 mm (0.8 x 2.4 x 4.5 inch)
Mountingon the KF module
Data for application in connection with hazardous areas
EU-type examination certificatePTB 02 ATEX 2044
MarkingEx-Hexagon II (1)G [Ex ia Ga] IIC
Voltage30 V
Current250 mA
Internal capacitancenegligible
Internal inductance200 µH
Maximum leakage current10 kA (8/20 µs) per conductor
Nominal response time
Symmetrical1 ns
Asymmetric100 ns
Series resistor≤ 0.5 Ω per wire
Bandwidth≥ 40 kHz
CertificatePF 16 CERT 3908 X
MarkingEx-Hexagon II 3G Ex nA IIC T4 Gc
Directive conformity
Directive 2014/34/EUEN 60079-0:2012+A11:2013 , EN 60079-11:2012 , EN 60079-15:2010
International approvals
IECEx approval
IECEx certificateIECEx BAS 12.0123
IECEx marking[Ex ia Ga] IIC, [Ex ia Da] IIIC, [Ex ia Ma] I
StandardsIEC 60079-0:2011 , IEC 60079-11:2011
General information
Supplementary informationObserve the certificates, declarations of conformity, instruction manuals, and manuals where applicable. For information see


ECLASS 11.027130805
ECLASS 10.0.127130805
ECLASS 9.027130805
ECLASS 8.027130805
ECLASS 5.127130801
ETIM 8.0EC000941
ETIM 7.0EC000941
ETIM 6.0EC000941
ETIM 5.0EC000941
UNSPSC 12.139121610

Documents: P-LB-1.C.123

ManualsLanguageFile TypeFile Size
Brief instructions Surge Protection BarriersENGPDF876 KB
Functional Safety ManualENGPDF2244 KB
Manual Surge Protection BarriersENGPDF1151 KB
Handbuch Funktionale SicherheitGERPDF2251 KB
Handbuch ÜberspannungsschutzbarrierenGERPDF2002 KB
Kurzanleitung ÜberspannungsschutzbarrierenGERPDF891 KB
Instruction manuals
Návod k poużitíCZEPDF129 KB
Instruktions manualDANPDF128 KB
Instruction manualENGPDF133 KB
KasutusjuhendESTPDF124 KB
KäyttöohjeFINPDF124 KB
Manuel d'instructionsFRAPDF130 KB
BetriebsanleitungGERPDF134 KB
Οδηγίες χρήσηςGREPDF137 KB
HandleidingHOLPDF128 KB
Instruction manual / BetriebsanleitungHRVPDF127 KB
Manuale di istruzioniITAPDF127 KB
Lietošanas pamācībaLAVPDF128 KB
Instrukciju vadovasLITPDF0 KB
Instrukcja obsługiPOLPDF130 KB
Manual de instruçõesPORPDF129 KB
Manual de utilizareRONPDF129 KB
Návod na poużitieSLKPDF129 KB
Navodila za uporaboSLVPDF127 KB
Manual de instruccionesSPAPDF128 KB
ManualSWEPDF126 KB

CAD+CAE: P-LB-1.C.123

CADFile TypeFile Size
Dimension drawing 2-D (DXF) / Abmessungszeichnung 2-D (DXF)ZIP347 KB

Approvals+Certificates: P-LB-1.C.123

Statements of complianceCertificate No.File TypeFile Size
EU-Declaration of conformity / EU-KonformitätserklärungDOC-0970APDF91 KB
Baseefa IECEx Certificate of ConformityIECEx BAS 12.0123LINK---
China SITIIAS CCC Ex Certificate2020322304002486 (Bintan)PDF943 KB
EAC EAC TP TC 012/2011TC RU C-DE.AA71.B.00140PDF2600 KB
Europe PTB ATEX Category (1) GPTB 02 ATEX 2044PDF452 KB
Europe Pepperl+Fuchs ATEX Category 3 G Certificate of CompliancePF16CERT3908XPDF184 KB
exida Functional Safety AssessmentP+F 11-10-085 R036 V1R0PDF477 KB

Associated Products: P-LB-1.C.123

Accessory Zener Barriers, Accessory Surge Protection, For individual grounding through insulated mounting, Packaging unit: 10 piecespa
Accessory Zener Barriers, Accessory Surge Protection, For individual grounding through insulated mountingpa
Accessory Zener Barriers, Accessory Surge Protection, For individual grounding through insulated mountingpa

Function: P-LB-1.C.123

This Surge Protection Barrier is designed for use with K-System (KF modules).

By simply snapping the barriers into a standard KF module, the modules are safely protected against voltage surges of different origin (e. g. lightning stroke, switching impulse, etc.). This is achieved by diverting the transient current to ground and limiting the signal line voltage to a safe level for the duration of the surge.

The end digits of the model designation correspond to the protected terminals of the respective KF module.

For additional information, refer to the manual and

Note: Surge Protection Barriers must always be connected to a solid and effective ground and be at the same equipotential level as the instrument it is protecting. The ground system must comply with all applicable regulations.