The TDK-Lambda LZS-1500-3 is a 1500W output industrial power supply delivering 24 VDC at 75 A for demanding industrial applications. This discontinued model provides stable, efficient power conversion with dual-range AC input (85-132 VAC / 170-265 VAC auto-selected) and optional DC input (220-380 VDC), making it suitable for diverse deployment environments. The unit achieves 75% typical efficiency with exceptionally tight line and load regulation of 0.1% across full operating ranges. Output ripple and noise are held to 10 mV RMS / 100 mV peak-peak, while transient response recovers within 50 ms with maximum 5% deviation.
Technical Specifications
Output
• 24 VDC nominal, 18.0-29.4 V adjustable range
• 75 A output current
• 1500 W continuous power
Input
• AC: 85-132 VAC / 170-265 VAC (auto-selected), 47-63 Hz
• DC: 220-380 VDC optional
• Maximum input current: 32 A RMS at 85 VAC
• Inrush current: 40 A / 80 A at 110/220 VAC
Performance
• Efficiency: 75% typical (74% at 115 VAC)
• Line regulation: 0.1%
• Load regulation: 0.1%
• Ripple & noise: 10 mV RMS, 100 mV peak-peak
• Hold-up time: 26 ms typical at 115 VAC
• Startup time: 1500 ms maximum at 110 VAC input
• Output isolation: 3000 VAC from AC input to auxiliary signals
– Key Features
• Overcurrent protection at approximately 110% of rated current with auto-recovery
• User-adjustable overvoltage protection via front panel
• Internal thermal protection with AC recycle reset
• Input transient protection
• Remote voltage sensing compensates for up to 1.0 V cable drop
• Remote on/off control (TTL compatible, active high)
• Single-wire current sharing for parallel operation
• Optically isolated monitoring outputs: AC Fail, DC Good, Inverter OK
• Status indicators: Green LED (Output Good), Red LED (Overvoltage/Over Temperature)
• 5-year warranty (parts and labor)
– Interfaces & Integration
Remote adjustment via front panel potentiometer (1 kΩ/V) or voltage input (1 V/V). Control and signal connections use chassis-mounted 15-pin sub-miniature D female connector. Monitoring signals are optically coupled conductance outputs capable of conducting up to 1 mA at <0.4 V when active.
– Typical Applications
Industrial equipment requiring stable 24 VDC power with high current capacity, applications demanding dual-range AC input flexibility, systems benefiting from remote sensing and parallel operation capability.
