Additional Resources: Product Page 3D Model datdatee 06/16/201406/16/2014 pagepage 1 of 61 of 6 SERIES: VFK400W-DIN DESCRIPTION: DC-DC CONVERTER FEATURES up to 400 W isolated output rugged metal enclosure with integrated heat sink 4:1 input range (10~36 Vdc, 18~75 Vdc) single output from 12~48 Vdc 1,500 Vdc isolation over current, over temperature, over voltage, and short circuit protection remote on/off efficiency up to 87% comes with DIN-rail mount inputinput outputoutput outputoutput outputoutput ripple ripple efficiencyefficiency MODELMODEL 11 voltagevoltage voltagevoltage currentcurrent powerpower and noiseand noise rangerange maxmax maxmax maxmax max max (Vdc)(Vdc) (Vdc)(Vdc) (A)(A) (W)(W) (mVp-p)(mVp-p) (%)(%) VFK400WVFK400W-Q24--Q24-S12S12-DIN 10~3610~36 1212 33.333.3 400400 200200 8787 VFK400WVFK400W-Q24--Q24-S24-DINS24 10~3610~36 2424 16.716.7 400400 240240 8686 VFK400WVFK400W-Q24--Q24-S48-DINS48 10~3610~36 4848 8.38.3 398398 480480 8686 2 VFK400WVFK400W-Q48--Q48-S12S12-DIN 20~7520~75 1212 33.333.3 400400 200200 8787 VFK400WVFK400W-Q48--Q48-S24-DINS24 18~7518~75 2424 16.716.7 400400 240240 8686 VFK400WVFK400W-Q48--Q48-S48S48-DIN 18~7518~75 4848 8.38.3 398398 480480 86.586.5 Note: Note: 1.1. RippleRipple andand noisenoise areare measuredmeasured atat fullfull load,load, 2020 MHzMHz BWBW withwith 10F10F tantalumtantalum capacitorcapacitor andand 1F1F cerceramicamic capacitorcapacitor acrossacross thethe output.output. TheThe 4848 VdcVdc outputoutput modelsmodels requirerequire aa 22uF aluminum capacitor and a 1uF cer22uF aluminum capacitor and a 1uF ceramic capacitor across the output.amic capacitor across the output. 2. An external input capacitor of 470uF is recommended to reduce input ripple v 2. An external input capacitor of 470uF is recommended to reduce input ripple voltage.oltage. PART NUMBER KEY VFK400W - QXX - SXX - DIN Base Number Mounting Type DIN = DIN-rail mount Input Voltage Output Voltage cui.comAdditional Resources: Product Page 3D Model CUI Inc SERIES: VFK400W-DIN DESCRIPTION: DC-DC CONVERTER date 06/16/2014 page 2 of 6 INPUT parameter conditions/description min typ max units 24 Vdc input 10 24 36 Vdc operating input voltage 12 Vdc output model 20 48 75 Vdc 48 Vdc input 24/48 Vdc output models 18 48 75 Vdc power up 9.5 Vdc 24 Vdc input power down 8.5 Vdc under voltage shutdown power up 17.8 Vdc 48 Vdc input power down 15.5 Vdc models ON (>3.5 Vdc or open circuit) 1 CTRL positive logic models OFF (0~1.2 Vdc) filter pi filter Note: 1. Open collector refer to -Vin OUTPUT parameter conditions/description min typ max units maximum output capacitance for all models 2,200 F line regulation measured from high line to low line 1 % load regulation measured from full load to zero load 1 % voltage accuracy 1.5 % adjustability 90 105 % switching frequency 250 kHz transient response 25% step load change 500 s temperature coefficient 0.03 %/C PROTECTIONS parameter conditions/description min typ max units short circuit protection continuous over current protection % nominal output current 110 150 % over voltage protection 115 140 % over temperature protection shutdown 110 C SAFETY AND COMPLIANCE parameter conditions/description min typ max units for 1 minute: input to output input to case isolation voltage 1,500 Vdc output to case isolation resistance 10 M RoHS 2011/65/EU (CE) ENVIRONMENTAL parameter conditions/description min typ max units operating temperature see derating curves -40 85 C storage temperature -55 105 C cui.com