MFA350 Series Screw Terminals Available U Channel & Cover Fan Formats 3 High Power Density 11.1 W/in 5 V Standby & 12 V Fan Outputs Active Current Share Remote On/Off AC & DC OK Signals -10 C to +70 C Operation Level B Conducted Emissions The MFA350 has been designed with multiple mechanical options to facilitate its integration into a wide range of applications. Designers of these systems demand higher power from AC-DC units in industry-standard formats as processing power and functionality grows within tight space constraints. The MFA350 delivers over 350 W across the full universal AC input range from an industry-standard 3.2 x 6.8 inch (81.3 x 172.7 mm) footprint. It is 1.5 inches (38.1 mm) high and achieves 11.1 Watts per cubic inch power density without compromising performance or functionality. With efficiency up to 88% at full load, the MFA350 operates up to 50 C ambient and up to 70 C ambient with derating. The main output is 12, 24 or 48 VDC but each power supply also has a 5 V, 0.3 A standby output and a 12 V, 1A output for powering fans. The unit incorporates a fully featured signal set including AC OK/DC OK, remote on/off and active current sharing.xppower.com Models and Ratings (2) Output Voltage Maximum Output Fan Output Standby Supply Max Power (1) Model Number V1 Current V2 V3 13 CFM Airflow 12.0 VDC 29.0 A 12 V/1 A 5 V/0.3 A 361 W MFA350PS12 24.0 VDC 14.5 A 12 V/1 A 5 V/0.3 A 361 W MFA350PS24 48.0 VDC 7.3 A 12 V/1 A 5 V/0.3 A 364 W MFA350PS48 Notes 1. Units supplied with AMP/TE connections for J1 & J2 as standard. Add suffix -S to model number to replace with screw terminals. Add suffix -TF for covered version with top fan and suffix -EF for covered version with end fan. Example:- MFA350PS12-STF, 12 V unit fitted with screw terminals and top fan. 2. Not available for -TF & -EF versions. Input Characteristics Characteristic Minimum Typical Maximum Units Notes & Conditions Input Voltage - Operating 85 264 VAC Derate output power 10% < 90 VAC Input Frequency 47 50/60 63 Hz EN61000-3-2 class A > Power Factor 0.9 EN61000-3-2 class C for loads 20% Input Current - No Load 100 mA Input Current - Full Load 3.6/1.8 A 115/230 VAC Inrush Current 60 A 230 VAC cold start Earth Leakage Current 1 mA 230 VAC/50 Hz Input Protection T6.3A/250 V internal fuse in line Output Characteristics Characteristic Minimum Typical Maximum Units Notes & Conditions Output Voltage - V1 12 48 VDC See Models and Ratings table (V1) (V2) (V3) Initial Set Accuracy 1 , 5 & 3 % Output Voltage Adjustment 10 % Minimum Load 0 No minimum load required Start Up Delay 12 s 90 VAC full load (see fig. 1) Hold Up Time 16 20 ms 90 VAC full load (see fig. 2 & 3) Drift 0.2 % After 20 min warm up (V1) (V2) (V3) Line Regulation 0.5 , 3 & 3 % (V1) (V2) (V3) Load Regulation 1 , 5 & 3 % 0-100% load. V2 10-100% load Recovery within 1% in less than 500 s Transient Response - V1 4% for a 50-75% and 75-50% load step Over/Undershoot - V1 1% (see fig. 4) (V1 & V3) (V2) Ripple & Noise 1 & 2 % pk-pk 20 MHz bandwidth (see fig. 6 & 7) Overvoltage Protection 115 140 % Vnom DC. Output 1 only, recycle input to reset Overload Protection 110 140 % I nom Output 1 only, auto reset (see fig. 5) Short Circuit Protection Continuous Temperature Coefficient 0.05 %/C Overtemperature Protection 75 C Thermal sensor under PCB 2