Lambda / TDK / EMI JFS050024

The TDK-Lambda JFS050024 is a 500W industrial-grade power supply engineered for demanding environments requiring stable, clean DC output. This unit delivers 24V nominal at up to 20.9A with active current sharing capability, wide universal input acceptance (85–265 VAC or 120–330 VDC), and integrated EMI filtering per EN55022 Class A. Built-in protection includes input transient suppression per EN61000-4, overcurrent limiting below 110% of rated power, and overvoltage clamping at 30V with auto-recovery.

The supply maintains output regulation within ±1% under load and line variations, with transient response recovering to spec within 5ms for 25% load steps. Remote ON/OFF, DC Good, and AC Power Fail signaling via open-collector outputs enable system-level monitoring and control. Adjustable output voltage via external resistor or bias allows tailoring to application requirements.

Approved to UL508, UL1950, CSA22.2 No.234, EN60950, IEC950, and FM3611 standards with CE marking. Operating range spans −20°C to +70°C with rated derating above 50°C and includes 16ms hold-up time to bridge brief input interruptions.

Technical Specifications

• Output: 24V nominal, 20.9A maximum; adjustable 20.0–29.0V


• Input: 85–265 VAC (47–63 Hz) or 120–330 VDC


• Power: 500W


• Efficiency: 75% typical at 110 VAC


• Regulation: ±1% load; ±1% line


• Ripple/Noise: 250 mV pk-pk


• Transient Response: <5ms recovery for 25% load change


• Hold-up Time: 16ms typical


• Power Factor: 0.99 typical; meets EN61000-3-2


• Temperature Range: −20°C to +70°C operating; −40°C to +85°C storage


• Isolation: 2 kVAC input-to-ground; 3 kVAC input-to-output; 500 VDC output-to-ground


• Weight: 6 lbs net

Key Features

• Active current sharing via single-wire connection for parallel operation


• Remote sensing compensates 0.25V drop per leg


• Conducted and radiated EMI filtering; Class A compliance


• Input surge, sag, spike, and lightning strike protection


• Auto-recovery overcurrent and overvoltage protection


• AC Power Fail and DC Good open-collector status signals


• Internal fan cooling; 10–90% RH non-condensing operation

Typical Applications Industrial control systems, telecom/datacom equipment, process automation, and distributed power architectures requiring high reliability and coordinated multi-supply designs.

Compatibility & Integration Barrier strip or bus-bar output connections. Remote ON/OFF (low = OFF, open = ON). Active current sharing enables paralleled configurations for higher power demands.