K-LB-1.6G Pepperl+Fuchs Surge Protection Barrier
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K-LB-1.6G Surge Protection Barrier: Precision Defense for Low-Voltage Circuits
Shield sensitive 6V field devices from lightning strikes, switching spikes, and transient surges with Pepperl+Fuchs' single-channel DIN-rail barrier. Engineered for intrinsically safe (IS) and non-IS applications, it diverts surges up to 20kA to ground while clamping voltages to safe levels. SIL 3 certified for critical safety systems.
Technical Specifications
| Parameter | Value |
|---|---|
| Brand & Model | Pepperl+Fuchs K-LB-1.6G |
| Series | K-LB Surge Protection |
| Rated Voltage | 6 V DC |
| Rated Current | 250 mA |
| Max. Surge Current (8/20 µs) | 20 kA (total), 10 kA per line |
| Leakage Current | < 10 µA at 1 V |
| Response Time | 1 ns (symmetric), 100 ns (asymmetric) |
| Bandwidth | ≥ 40 kHz |
| Voltage Protection Level | ≤ 90 V (line-line), ≤ 25 V (line-ground) |
| Insertion Loss | ≤ 0.05 dB (0–4 kHz), ≤ 3 dB (0–174 kHz) |
| Operating Temperature | -30°C to 80°C (-22°F to 176°F) |
| Hazardous Area Certifications | ATEX, IECEx, CSA |
| Connection | Protected side: Terminals 7, 8; Unprotected side: Terminals 1, 2 |
Installation Guide
- Mount on 35mm DIN rail (EN 60715-compliant)
- Terminal torque: 0.6 N·m
- Field devices → Protected terminals
- Controllers → Unprotected terminals
- Ensure equipotential bonding to ground
Diagnostics & Maintenance
- Auto-reset within < 30 ms after surge events
- No visual status LED – verify function annually with surge simulator
- Replace if physical damage or corrosion detected
Shipping & Packaging
- Packaging List: 1x K-LB-1.6G barrier, DIN rail clips, quick-start guide
- Shipping: FedEx, UPS, DHL (2–5 business days globally)
Industry Applications
- Thermocouples & RTDs: Protects 2-wire Pt100 sensors in refineries
- Process Control: Shields analog inputs (e.g., pH/flow meters) in chemical plants
- Factory Automation: Secures PLC input cards from motor-driven surges
FAQs
Q: Can this barrier protect RS485 communication lines?
A: No – use model BXT ML2 BE S5 for RS485 (supports 1.6Mbit/s, 20kA surge)
Q: Is grounding mandatory for safety compliance?
A: Yes – equipotential grounding is critical for Ex-area certification (ATEX/IECEx)
Q: What is the lifetime after repeated surges?
A: Rated for 10+ surges at 10kA/line and 1 surge at 20kA total
Q: Does it work with 4-20mA signals at 24V?
A: No – use K-LB-1.30G for 24–30V applications