FN-LB-I Pepperl+Fuchs Surge Protection Barrier 20 kA

Surge Protection Barrier FN-LB-I: Ultimate Hazardous Area Defense

Industrial-grade 1-channel surge protector for critical signals in explosive environments. SIL 3 certified protection with 20kA surge suppression.

Critical Technical Specs

• Brand: Pepperl+Fuchs
• Model: FN-LB-I
• Working Voltage: ≤48V DC
• Signal Current: ≤250mA
• Surge Protection: 20kA (8/20µs)
• Max Continuous Voltage: 85V
• Insertion Loss: ≤0.2dB (40kHz bandwidth)

Safety & Certifications

• SIL 3 (IEC/EN 61508)
• ATEX Certified: 1 II 2G EEx ia IIC T6
• IP67 stainless steel housing
• CSA, IECEx, EU Directive 2014/34/EU

Installation Guide

1. Mount via ½ NPT thread
2. Connect signal wires to terminals
3. Bond ground wire securely
4. Verify 500V+ isolation to earth

System Integration

Works with all major PLC/DCS systems including Siemens, Rockwell, and Schneider. Compatible with intrinsic safety barriers.

Shipping & Packaging

• Included: 1x Surge Protector, Mounting Hardware
• Shipping: FedEx/UPS/DHL (2-5 business days)
• Weight: 200g (0.44 lbs)

Maintenance & Diagnostics

No routine maintenance needed. Check ground connection integrity annually. Replace after major surge events.

Core Protection & Positioning

Essential defense for sensitive instrumentation signals in oil/gas, chemical plants, and mining. Prevents lightning strikes and power surges from damaging control systems.

How It Works

Diverts surge energy to ground within 1ns. Maintains 500V electrical isolation while allowing normal signal flow with ≤5µA leakage.

FAQ

Q: Temperature limits?
A: -30°C to 60°C (-22°F to 140°F)

Q: Signal delay impact?
A: Negligible 1ns response time

Q: Warranty period?
A: 12 months against defects