The TDK-Lambda HFE3500 series comprises high-performance 3500W front-end power supplies in a 1U form factor for industrial applications. Designed for hot-swappable and redundant system architectures, the series is suitable for both standalone operation and highly scalable power supply concepts with up to 13,300W in a single 1U rack. Up to four power supplies can be integrated into a 19-inch 1U rack, while up to three complete racks can be connected in parallel for a common output solution. Thanks to its internal ORing MOSFET, current-share function, and standard PMBus interface, the HFE3500 series provides a reliable, easily monitored, and flexibly adaptable power supply for demanding industrial, communications, test, and broadcast applications. Standard features also include AC fail and DC good signals, remote on/off, remote adjust, and an auxiliary output of 5V or 12V. Variants with 24V or 48V output voltage are available.
Product features:
- Output power: 3504W per power supply at input voltages > 180Vac
- Output voltages: 24V or 48V
- Adjustable output voltage range: 24.0–27.6V or 48.0–55.2V
- Maximum current: 146A at 24V or 73A at 48V (at Vin > 180Vac)
- Reduced power at 100–170Vac: up to 2016W
- AC input voltage range: 85–264Vac
- Nominal input voltage range: 100–240Vac
- Input frequency: 47–63Hz
- Efficiency: up to 94% at 230Vac
- Power factor correction: 0.97 at maximum output power
- Idle power consumption:
- Line regulation: 0.25% and load regulation: 0.5%
- Ripple & Noise: 240mV (24V model) or 480mV (48V model)
- No minimum load requirement
- Overcurrent protection: 101–120% of rated output current, hiccup mode with automatic recovery
- Overvoltage protection: 110% tracking, reset via AC cycle or remote on/off
- Overtemperature protection with automatic reset and warning signal
- Remote on/off and external output adjustment via 0–5V signal or 1k potentiometer
- Auxiliary output: 5V/2A or 12V/1A
- Communication: isolated PMBus (I2C) interface standard, optional LAN rack connection
- Parallel connection: up to 12 devices, power sharing via Single-Wire Current Share
- Series connection: 2 devices possible, with external diodes
- Operating temperature: 0 to +40°C at full load, derating up to +70°C
- Cooling: internal variable-speed fans
- Maximum operating altitude: 5000m
- Power supply dimensions: 107 x 40.1 x 330mm
- Rack dimensions: 444.5 x 43.7 x 428mm
- Weight: approx. 2.0 kg per power supply, approx. 4.9 kg per rack
- MTBF: 75,000 hours at 30°C ambient temperature
- Safety and standards compliance: IEC/UL/CSA/EN62368-1, EN/UL61010-1, CE, UKCA, EN55011/EN55032, FCC Part 15, VCCI and EN61000-6-2
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