Overview
The Phoenix Contact FLT-PLUS CTRL-1.5/I is a Type 1/Class I lightning current arrester designed for single-phase industrial control and power distribution circuits. Part of the Flashtrab FLT-PLUS-CTRL series, this unit combines arc-chopping spark gap technology with electronic ignition to deliver fast, reliable protection against direct lightning strikes and induced surges.
Key Features
- Type 1/Class I protection with encapsulated arc-chopping spark gap and electronic ignition
- 1.5 kV voltage protection level (Up) with 100 ns response time
- Handles 50 kA lightning test current (10/350 µs) and 50 kA follow-through current
- DIN rail 35 mm mounting; 2-module width (35.5 mm)
- Optical surge protection fault indicator
- IP20 degree of protection; inflammable housing (UL 94 V0)
Technical Specifications
- Nominal Voltage (UN): 230 V AC / 400 V AC
- Maximum Continuous Operating Voltage (UC): 350 V AC
- Voltage Protection Level (Up): ≤ 1.5 kV
- Lightning Current (10/350 µs): 50 kA peak
- Lightning Current Specific Energy: 625 kJ/Ω
- Response Time: ≤ 100 ns
- Follow Current Quenching: 50 kA (at 400 V AC)
- Maximum Backup Fuse: 500 A (NH-gL)
- Short-Circuit Resistance: 50 kA effective
- Direction of Action: 1L-N/PE (single phase)
- Operating Temperature: −40 °C to +85 °C
- Housing Dimensions: 149.8 mm (L) × 80.5 mm (H) × 35.5 mm (W)
- Weight: 510 grams
- Mounting: DIN rail 35 mm, rail-mountable module
- Degree of Protection: IP20
- Connection Type: Biconnect screw terminal blocks (IN/OUT)
Typical Applications
- Control panel and PLC lightning protection on unshielded input lines
- Single-phase 230 V / 400 V AC industrial motor and servo drive circuits
- Telecommunications and automation equipment signal lines
- Building automation and HVAC control systems
- Power distribution in storm-prone environments
Compatibility & Replacements
Compatible With
- DIN rail mounting systems (35 mm standard)
- Single-phase AC power distribution networks (TT, TN-C, TN-S)
- Industrial control circuits rated 230 V AC / 400 V AC
- Biconnect screw terminal block connection standard
- PLC, servo drive, and motion control input protection schemes
Replaces / Drop-In Replacement For
- Verify compatibility with your system integrator before ordering.
Works With
- IEC 61643-1 Type 1/Class I surge suppression architectures
- EN 60664-1 and VDE 0110-1 installation standards
- NF C61-740 and VDE 0675-6 compliance frameworks
- Optical fault indicator for alarm circuit integration
