The Ault Korea / Power General FLU2-40-4 is a 40W dual output open-frame switching power supply engineered for reliable DC delivery across diverse industrial and electronic systems. Built on a flyback converter topology with current-mode control, this unit accepts universal AC input (85-265 VAC, 47-440 Hz) or DC input (36-75 VDC nominal 48V), delivering flexibility across multiple power source configurations. The supply operates with zero minimum load requirement and integrates MOV transient protection plus a recommended 2A/250V slow-blow input fuse.
## Technical Specifications
• **Output Power:** 40W maximum
• **Input Voltage (AC):** 85-265 VAC, single phase, 47-440 Hz
• **Input Voltage (DC):** 36-75 VDC (48V nominal)
• **Efficiency:** 62-75% typical at nominal input and load
• **Hold-Up Time:** 16 ms minimum (115 VAC, full load); 32 ms minimum (230 VAC, full load)
• **MTBF:** >200,000 hours (MIL-HDBK 217F, ground benign, 25°C)
• **Operating Temperature:** -20°C to +70°C
• **Primary Output Adjustment:** ±5%
• **Peak Output Current:** Varies by sub-model (5.0A, 3.0A, or 2.0A typical)
## Key Features
• Dual output configuration with fixed auxiliary outputs
• EN55022/FCC Class B compliant EMI filter exceeding conducted requirements by 10 dB typical
• Over-current/short-circuit protection with continuous operation
• Over-voltage protection on primary output
• Soft-start circuit standard
• Power-limit overload protection
• Convection cooling; forced air recommended for confined installations
## Typical Applications
• Industrial control systems with dual voltage rails
• Telecommunications and networking equipment
• Factory automation and process control
• Multi-rail embedded power architectures
## Compatibility & Integration
The FLU2-40-4 integrates into open-frame designs requiring compact footprint and universal input capability. Dual outputs accommodate primary and auxiliary rail requirements simultaneously. Output voltage configuration and specific current ratings depend on sub-model suffix designation (e.g., -1AD, -4AD). Load regulation measured at 115 VAC or 230 VAC; multi-output regulation tested with primary output at 60% nominal load and auxiliary outputs at nominal load.
