For more information, please visit the product page. ddaattee 0044//0011//22001133 ppaaggee 11 ooff 44 SERIES: VHB50W │ DESCRIPTION: DC-DC CONVERTER FEATURES • up to 50 W isolated output • industry standard half brick package • 4:1 input range (9~36 V, 18~75 V) • single output from 3.3~48 V • 1,500 V isolation • over current, over temperature, over voltage, and short circuit protections • remote on/off • efficiency up to 87% RoHS MODEL input output output output ripple efficiency voltage voltage current power and noise1 range max max max typ (Vdc) (Vdc) (A) (W) (mVp-p) (%) VHB50W-Q24-S3R3 9 ~ 36 3.3 10 33 100 77 VHB50W-Q24-S5 9 ~ 36 5 10 50 100 81 VHB50W-Q24-S12 9 ~ 36 12 4.16 50 150 83 VHB50W-Q24-S15 9 ~ 36 15 3.33 50 150 83 VHB50W-Q24-S24 9 ~ 36 24 2.08 50 240 83 VHB50W-Q24-S28 9 ~ 36 28 1.78 50 280 83 VHB50W-Q24-S48 9 ~ 36 48 1.04 50 480 83 VHB50W-Q48-S3R3 18 ~ 75 3.3 10 33 100 78 VHB50W-Q48-S5 18 ~ 75 5 10 50 100 82 VHB50W-Q48-S12 18 ~ 75 12 4.16 50 150 84 VHB50W-Q48-S15 18 ~ 75 15 3.33 50 150 84 VHB50W-Q48-S24 18 ~ 75 24 2.08 50 240 84 VHB50W-Q48-S28 18 ~ 75 28 1.78 50 280 84 VHB50W-Q48-S48 18 ~ 75 48 1.04 50 480 83 Notes: 1. ripple and noise are measured at 20 MHz BW with 10µF tantalum capacitor and 1µF ceramic capacitor across output PART NUMBER KEY VHB50W - QXX - SXX X Base Number Input Voltage Output Voltage Remote On/Off Control "blank" = positive logic N = negative logic c u i . c o m

For more information, please visit the product page. CUI Inc │ SERIES: VHB50W │ DESCRIPTION: DC-DC CONVERTER date 04/01/2013 │ page 2 of 4 INPUT parameter conditions/description min typ max units 24 V input 9 24 36 Vdc operating input voltage 48 V input 18 48 75 Vdc 24 V input 8.8 Vdc power up 48 V input 17 Vdc under voltage lockout 24 V input 8 Vdc power down 48 V input 16 Vdc positive logic remote on/off1 filter PI type Notes: 1. logic compatibility, open collector ref to -input Module ON, >3.5 Vdc or open circuit Module OFF, <1.8 Vdc OUTPUT parameter conditions/description min typ max units line regulation measured from high line to low line ±0.2 % load regulation measured from full load to zero load ±0.2 % voltage accuracy ±1 % transient response 25% step load change 500 µs adjustability2 ±10 % switching frequency 100% load, input voltage range 300 kHz temperature coefficient ±0.03 %/°C Notes: 2. trim-up: connect a resistor between the trim pin and -Sense trim-down: connect a resistor between the trim pin and +Sense PROTECTIONS parameter conditions/description min typ max units over voltage protection %Vo 115 140 % short circuit protection continuous current limit % nominal output current 110 160 % thermal shutdown case temp. 100 °C SAFETY AND COMPLIANCE parameter conditions/description min typ max units input to output 1,500 Vdc isolation voltage input to case 1,500 Vdc output to case 1,500 Vdc isolation resistance 10 MΩ isolation capacitance 1,000 pF safety approvals UL 60950-1 RoHS compliant yes c u i . c o m

For more information, please visit the product page. CUI Inc │ SERIES: VHB50W │ DESCRIPTION: DC-DC CONVERTER date 04/01/2013 │ page 3 of 4 ENVIRONMENTAL parameter conditions/description min typ max units case operating temperature -40 100 °C storage temperature -55 105 °C humidity non-condensing 95 % MECHANICAL parameter conditions/description min typ max units dimensions 57.9 x 61.0 x 12.7 (2.28 x 2.40 x 0.5 inch) mm case material aluminum weight 94 g MECHANICAL DRAWING units: mm [inches] tolerance: ±0.25mm [±0.01 inches] pin tolerance: ±0.5mm [±0.02 inches] 57.90 2.280 4.60 0.181 12.70 0.500 PIN CONNECTIONS 2.03 0.080 PIN FUNCTION (2 PLCS) 1 +Vin 50.80 2.000 4 5 (2 PLCS) 2 On/Off 61.00 2.402 3 CASE 3 6 15.24 0.600 7 35.56 1.400 4 -Vin (2 PLCS) (2 PLCS) 5 -Vo 2 8 1.02 0.040 (7 PLCS) 6 -S 1 9 7 TRIM 8 +S 9 +Vo R1.50 0.059 M3X0.5 TH(R4O PULGCHS) 48.25 1.900 (2 PLCS) BOTTOM VIEW Note: All specifications measured at 25°C, nominal input voltage, and full load unless otherwise noted. c u i . c o m

For more information, please visit the product page. CUI Inc │ SERIES: VHB50W │ DESCRIPTION: DC-DC CONVERTER date 04/01/2013 │ page 4 of 4 REVISION HISTORY rev. description date 1.0 initial release 09/07/2006 1.01 new template applied 08/05/2011 1.02 add remote on/off control to the part number key 11/23/2011 1.03 features updated 12/20/2011 1.04 updated trim note, updated pin references 04/20/2012 1.05 updated spec 04/01/2013 The revision history provided is for informational purposes only and is believed to be accurate. Headquarters 20050 SW 112th Ave. Fax 503.612.2383 Tualatin, OR 97062 cui.com 800.275.4899 techsupport@cui.com CUI offers a two (2) year limited warranty. Complete warranty information is listed on our website. CUI reserves the right to make changes to the product at any time without notice. Information provided by CUI is believed to be accurate and reliable. However, no responsibility is assumed by CUI for its use, nor for any infringements of patents or other rights of third parties which may result from its use. CUI products are not authorized or warranted for use as critical components in equipment that requires an extremely high level of reliability. A critical component is any component of a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or system, or to affect its safety or effectiveness.