Additional Resources: Additional Resources: Product PageProduct Page 3D Model3D Model date 04/26/2021 page 1 of 5 SERIES: VF-D250-DXXA DESCRIPTION: AC-DC POWER SUPPLY FEATURES up to 250 W continuous power w/ 16 CFM forced air 600 W peak power within 500 s duty duration passive power correction dual outputs power good signal remote on/off control 3,000 Vac isolation voltage over load, over voltage, over temperature, and short circuit protections UL/cUL, and TUV 62368-1 safety approvals efficiency up to 70% RoHS output output output ripple and efficiency MODEL 1 3,4 voltage current power noise max w/ max w/ 2 2 max airflow max airflow max typ (Vdc) (A) (A) (W) (W) (mVp-p) (%) 3.3 12 24 50 VF-D250-D312A 100 200 70% 12 7 12 120 3.3 12 24 50 VF-D250-D324A 100 200 70% 24 4 6 240 5 12 24 50 VF-D250-D512A 100 200 70% 12 7 12 120 5 12 24 50 VF-D250-D524A 100 200 70% 24 4 6 240 5 12 24 50 VF-D250-D548A 100 200 70% 48 2 3 480 12 7 12 120 VF-D250-D1224A 135 250 70% 24 4 6 240 Notes: 1. Maximum total combined power 2. With external 16 CFM fan 3. 10% minimum load is required to maintain the ripple and regulation. 4. Ripple and noise is measured from 10 KHz to 20 MHz at output terminals with a 0.1 F ceramic capacitor and a 22 F electrolytic capacitor in parallel. PART NUMBER KEY VF - D250 - DXX A - X X Base Number Output Voltage Low leakage option: blank = standard specification L = low leakage (contact factory) Input/Output connector: blank = Terminal block input / Terminal block output 1 = Molex input / Molex output 2 = Molex input / Terminal block output 3 = Terminal block input / Molex output cui.comAdditional Resources: Additional Resources: Product PageProduct Page 3D Model3D Model CUI Inc SERIES: VF-D250-DXXA DESCRIPTION: AC-DC POWER SUPPLY date 04/26/2021 page 2 of 5 INPUT parameter conditions/description min typ max units 90 132 Vac voltage auto selectable 180 264 Vac frequency 47 63 Hz at 110~120 Vac, cold start 6 A current at 200~240 Vac, cold start 3 A at 115 Vac, full load, cold start 35 A inrush current at 230 Vac, full load, cold start 70 A power factor compliant to EN 61000-3-2 class A designated as RMSW on the CN1, requires a low signal to inhibit output remote on/off off behavior: hiccup mode OUTPUT parameter conditions/description min typ max units regulation 5 % Output voltage returns to within 1% in less than 2.5 ms for a 50% load change. transient response Peak transient does not exceed 5%. start-up time at 230 Vac 1 s hold-up time at 80% of rated maximim load 20 ms adjustability 5 % switching frequency fixed 25 kHz Designated as PG on the CN1. power good This signal goes high 100~500 ms after the output reaches regulation. It goes low at least 1 ms before loss of regulation (open collector). fan drive 12 Vdc / 300 mA for external fan PROTECTIONS parameter conditions/description min typ max units over voltage protection AC input needs to be reset to restart the power supply 130 % over current protection automatically recovers 110 140 % short circuit protection short circuit can be continuous, recovers automatically over temperature protection auto recovery 110 C SAFETY & COMPLIANCE parameter conditions/description min typ max units applied for 3 seconds at 10 mA max. primary to secondary 3,000 Vac isolation voltage primary to transformer core 1,500 Vac primary to earth chassis 1,500 Vac safety approvals IEC/EN/UL 62368-1 EN 55032 Class B conducted / radiated, EN 61000-3-2, EN 61000-3-3, EN 55024 (IEC 61000-4-2, EMI/EMC IEC 61000-4-3, IEC 61000-4-4, IEC 61000-4-5, IEC 61000-4-6, IEC 61000-4-8, IEC 61000-4-11) standard model at 264 Vac 1 mA leakage current low-leakage model at 240 Vac 500 A low-leakage model at 120 Vac 300 A RoHS yes MTBF according to MIL-HDBK-217 at 30 C 100,000 hrs cui.com