The TDK-Lambda LFS-42-15 is a 15V DC regulated power supply engineered for industrial switching applications requiring stable, reliable output across worldwide input voltages. This convection-cooled unit delivers 8.5 A at 40°C with user-selectable input configurations (85–132 VAC / 170–250 VAC or 95–132 VAC / 187–265 VAC) and supports 47–440 Hz operation. The supply incorporates remote sense, remote programming, and TTL-compatible remote on/off control, enabling flexible system integration without external monitoring hardware.
Technical Specifications
• Output: 15V DC, adjustable ±5%
• Current Rating: 8.5 A at 40°C; 7.5 A at 50°C; 6.3 A at 60°C
• Input Power: 186 W maximum; 3.7 A RMS maximum
• Input Voltage: 85–132 VAC / 170–250 VAC or 95–132 VAC / 187–265 VAC (user selectable)
• Input Frequency: 47–440 Hz
• Line Regulation: 0.4%
• Load Regulation: 0.8%
• Output Ripple & Noise: 15 mV RMS; 75 mV pk-pk
• Temperature Coefficient: 0.02%/°C
• Efficiency: 72% minimum (15V model)
• Hold-Up Time: 16.7 msec at 105 VAC input, full load
• Connectors: Molex Type 5289-4A (AC input); Molex Type 5287-4A (DC output)
– Key Features
• Automatic electronic current limiting with automatic recovery (overload and short-circuit protection)
• Non-crowbar, inverter shutdown overvoltage protection
• Fan failure protection built-in
• No overshoot at turn-on, turn-off, or power failure
• In-rush current limiting to preset value
• LED voltage presence indicator
• Open collector DC power fail signal (selected models)
• Remote programming with 10 kΩ/V nominal impedance
• Convection cooling—no forced-air ventilation required in standard installations
– Typical Applications
• Industrial control systems and process instrumentation
• Telecommunications and network equipment
• Distributed power architectures requiring remote monitoring and control
• Environments with international AC supply variability
– Compatibility & Integration
PC board-mounted terminal blocks accommodate input, sensing, and remote on/off signals. TTL-level control signals enable straightforward integration with industrial logic circuits and supervisory systems.
