Pepperl Fuchs M-LB-4252
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Quick facts
| Availability | Confirmed on request |
| Category | Devices for Signal Line Protection |
| Lifecycle | active |
| Warranty | 12-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 lines | 2 |
| Topology | non-grounded |
Functional safety related parameters
| Safety Integrity Level (SIL) | SIL 3 |
Electrical specifications
| 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 Uc |
| Nominal load current | 0.75 A at 70 °C (158 °F) IL |
| Series resistance | 1 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 level | max. 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 frequency | 3.6 MHz , line-line fG |
Indicators/settings
| Display elements | status display operating state (green)fault indication (red) |
Conformity
| 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 conditions
| 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 |
Mechanical specifications
| 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 |
| 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 |
| Height | 90 mm |
| Width | 6 mm |
| Depth | 69 mm |
| Mounting | on 35 mm DIN mounting rail acc. to EN 60715:2001 |
Data for application in connection with hazardous areas
| Certificate | TÜV 22 ATEX 8881 X |
| Marking II 3G Ex ec IIC T4 GcTemperature classT4 for ambient temperature ≤ 80 °C | Marking |
| 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 |
| Directive 2014/34/EU | EN 60079-0:2018 , EN IEC 60079-7:2015+A1:2018 |
International approvals
| UL approval | E501704 |
| IECEx approval | |
| IECEx certificateIECEx TUR 22.0051XIECEx markingEx ec IIC T4 Gc | IECEx certificate |
| IECEx certificate | IECEx TUR 22.0051X |
| IECEx marking | Ex ec IIC T4 Gc |
General information
| Supplementary information | Observe the certificates, declarations of conformity, instruction manuals, and manuals where applicable. For information see www.pepperl-fuchs.com. |
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