Available on request

Pepperl Fuchs M-LB-4252

MPN: M-LB-4252 · Brand: Pepperl Fuchs
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12-month warranty (new) · 3-month (used/refurbished)
30-day returns, no restocking fee on unused parts
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Quick facts

AvailabilityConfirmed on request
CategoryDevices for Signal Line Protection
Lifecycleactive
Warranty12-month (new) · 3-month (used/refurbished)

Shipping & availability

When can M-LB-4252 be shipped?

M-LB-4252 is sourced on request — request a quote and we'll confirm the exact availability and shipping timeline for this specific unit.

Can I pick up M-LB-4252 in person?

Local pickup from our Groningen, Netherlands warehouse may be possible — contact us before ordering to check availability and arrange a collection time.

Is express delivery available?

Yes — mention it when you request a quote for M-LB-4252 and we'll include express shipping options in our reply.

My factory is down and I need this urgently — can you help?

For a critical breakdown, contact us directly at +31 (0)50-7110348 or sales@partnerplc.com — we can look into same-day courier or dedicated taxi/hotshot delivery for M-LB-4252, subject to availability and destination.

Surge Protection Barrier. Surge protection for 2 signal lines, Nominal voltage 48 V, Surge protection barrier for non-grounded signal lines, Max. surge current (8/20 µs) 20 kA, Uninterruptable operation (auto reset), Status indication, Modular design, pluggable, Up to SIL 3 acc. to IEC/EN 61508, Modularity: two-piece, Number of protected signal lines: 2, Topology: non-grounded, Safety Integrity Level (SIL): SIL 3, Nominal discharge current (8/20 µs): 5 kA per line. Number of protected signal lines: 2. Topology: non-grounded. Safety Integrity Level (SIL): SIL 3. Connection: protected area: terminals 1', 2' unprotected area: terminals 1, 2. Leakage current: < 30 µA bei Uc , line-line < 10 nA bei Uc , line-earth. Nominal voltage: 48 V. Maximum continuous operating voltage: 39.6 V AC and 56 V DC. Nominal load current: 0.75 A at 70 °C (158 °F). Series resistance: 1 Ω per line. Impulse discharge current (10/350 µs): 1.5 kA per line. Nominal discharge current (8/20 µs): 5 kA per line. Max. surge current (8/20 µs): 20 kA. Total discharge current (8/20 µs): 10 kA. Voltage protection level: max. 90 V line-line for nominal discharge current In max. 600 V line-earth for nominal discharge current In. Impulse reset time: < 30 ms. Cut-off frequency: 3.6 MHz , line-line. Display elements: status display operating state (green)fault indication (red). Degree of protection: IEC 60529:2013. Functional safety: IEC/EN 61508:2010. Surge protective devices for low voltage: EN 61643-21:2001+A1:2009+A2:2013 IEC 61643-21:2001+A1:2008+A2:2012. Ambient temperature: -40 ... 80 °C (-40 ... 176 °F). Storage temperature: -40 ... 80 °C (-40 ... 176 °F). Relative humidity: max. 95 % , without condensation. Corrosion resistance: acc. to ISA-S71.04, severity level G3. Degree of protection: IP20. Connection: spring terminals with push-in connection technology. Core cross section: 0.2 ... 2.5 mm2 one wire 0.2 ... 2.5 mm2 fine-strand. Material: . HousingPolyamide PA 6.6: . Housing: Polyamide PA 6.6. Mass: approx. 35 g. Dimensions: 6 x 90 x 69 mm (0.24 x 3.5 x 2.7 inch) (W x H x D). Height90 mmWidth6 mmDepth69 mm: . Height: 90 mm. Width: 6 mm. Depth: 69 mm. Mounting: on 35 mm DIN mounting rail acc. to EN 60715:2001. Certificate: TÜV 22 ATEX 8881 X. Marking II 3G Ex ec IIC T4 GcTemperature classT4 for ambient temperature ≤ 80 °C: . Marking: II 3G Ex ec IIC T4 Gc. Temperature class: T4 for ambient temperature ≤ 80 °C. Directive conformity: . Directive 2014/34/EUEN 60079-0:2018 , EN IEC 60079-7:2015+A1:2018: . Directive 2014/34/EU: EN 60079-0:2018 , EN IEC 60079-7:2015+A1:2018. UL approval: E501704. IECEx approval: . IECEx certificateIECEx TUR 22.0051XIECEx markingEx ec IIC T4 Gc: . IECEx certificate: IECEx TUR 22.0051X. IECEx marking: Ex ec IIC T4 Gc. Supplementary information: Observe the certificates, declarations of conformity, instruction manuals, and manuals where applicable. For information see www.pepperl-fuchs.com.

Specifications

General specifications

Number of protected signal lines2
Topologynon-grounded

Functional safety related parameters

Safety Integrity Level (SIL)SIL 3

Electrical specifications

Connectionprotected area: terminals 1', 2' unprotected area: terminals 1, 2
Leakage current< 30 µA bei Uc , line-line < 10 nA bei Uc , line-earth
Nominal voltage48 V
Maximum continuous operating voltage39.6 V AC and 56 V DC Uc
Nominal load current0.75 A at 70 °C (158 °F) IL
Series resistance1 Ω per line
Impulse discharge current (10/350 µs)1.5 kA per line Iimp
Nominal discharge current (8/20 µs)5 kA per line In
Max. surge current (8/20 µs)20 kA Imax
Total discharge current (8/20 µs)10 kA Itotal
Voltage protection levelmax. 90 V line-line for nominal discharge current In max. 600 V line-earth for nominal discharge current In Up
Impulse reset time< 30 ms
Cut-off frequency3.6 MHz , line-line fG

Indicators/settings

Display elementsstatus display operating state (green)fault indication (red)

Conformity

Degree of protectionIEC 60529:2013
Functional safetyIEC/EN 61508:2010
Surge protective devices for low voltageEN 61643-21:2001+A1:2009+A2:2013 IEC 61643-21:2001+A1:2008+A2:2012

Ambient conditions

Ambient temperature-40 ... 80 °C (-40 ... 176 °F)
Storage temperature-40 ... 80 °C (-40 ... 176 °F)
Relative humiditymax. 95 % , without condensation
Corrosion resistanceacc. to ISA-S71.04, severity level G3

Mechanical specifications

Degree of protectionIP20
Connectionspring terminals with push-in connection technology
Core cross section0.2 ... 2.5 mm2 one wire 0.2 ... 2.5 mm2 fine-strand
Material
HousingPolyamide PA 6.6 Housing
HousingPolyamide PA 6.6
Massapprox. 35 g
Dimensions6 x 90 x 69 mm (0.24 x 3.5 x 2.7 inch) (W x H x D)
Height90 mmWidth6 mmDepth69 mm Height
Height90 mm
Width6 mm
Depth69 mm
Mountingon 35 mm DIN mounting rail acc. to EN 60715:2001

Data for application in connection with hazardous areas

CertificateTÜV 22 ATEX 8881 X
Marking II 3G Ex ec IIC T4 GcTemperature classT4 for ambient temperature ≤ 80 °C Marking
MarkingII 3G Ex ec IIC T4 Gc
Temperature classT4 for ambient temperature ≤ 80 °C
Directive conformity
Directive 2014/34/EUEN 60079-0:2018 , EN IEC 60079-7:2015+A1:2018 Directive 2014/34/EU
Directive 2014/34/EUEN 60079-0:2018 , EN IEC 60079-7:2015+A1:2018

International approvals

UL approvalE501704
IECEx approval
IECEx certificateIECEx TUR 22.0051XIECEx markingEx ec IIC T4 Gc IECEx certificate
IECEx certificateIECEx TUR 22.0051X
IECEx markingEx ec IIC T4 Gc

General information

Supplementary informationObserve the certificates, declarations of conformity, instruction manuals, and manuals where applicable. For information see www.pepperl-fuchs.com.
12-month warrantyon all new stock
3-month warrantyon used & refurbished parts
30-day returnsno restocking fee on unused parts
Global shippingFast, tracked delivery worldwide

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