75W Brick DC/DC Converter : DUQB075

DUQB075 - 75 Watts DC-DC Converter with Isolation


Brick Power Supply, Brick DC-DC Converter

75Watts 12-160VDC 14:1 Input Quarter Brick Railway DC-DC Converter
  • 75W Isolated Output
  • Efficiency up to 91%
  • Fixed Switching Frequency
  • 14:1 Input Range
  • Regulated Outputs
  • Remote On/Off
  • Low No Load Power Consumption
  • Fully protected (OTP/OCP/OVP/UVLO)
  • 3000Vac I/O Isolation
  • Operating Case Temperature -40 to +105℃
  • Quarter Brick Size Meet Industrial Standard 2.28”x1.45”x0.5”
  • CB Test Certificate IEC62368-1
  • EN55032/EN55035/EN50155 Compliant with External Circuits
  • UL62368-1 2nd (Reinforce Insulation) Approval
  • Shock & Vibration EN50155 (EN61373) Compliant
  • Fire & Smoke EN45545-2 Compliant
  • 5000m Operating Altitude.
  • Option Model with Bus & External UVLO Function
Input Voltage Range 72VDC Range: 12-160VDC
Under voltage Lockout 72Vin power up 11V ; power down 10V
Input Filter PI Filter.
Voltage Accuracy ± 1% max
Transient Response 75%-100% Io_max step load change,Error Band ±5% Vout;Recover Time 250 µs
Output Voltage Remote Sense Range 54V, +10%; Others, +20%
R&N (5Hz to 20MHz bandwidth) 5V&12V&15V: 80mV RMS, 150mV pk-pk, max.
24V&28V: 120mV RMS, 240mV pk-pk max.
54V: 220mV RMS, 480mV pk-pk max.
Load Regulation Full load to no load ± 0.2% max
Line Regulation Vin=High line to low line, full load ± 0.2% max
Temperature Coefficient Tc=-40℃ to 105℃ ± 0.02% / °C max.
Short Circuit Protection Continuous, Auto Recovery.
O.V.P. Limited Voltage, % of Nominal Vo 54V 112% ~ 140%;Others 117% ~ 140%
Over Current Protection Hiccup Mode. Auto Recovery. 110% ~ 180%
Isolation Voltage Input/Output 3000VAC min.; Input/Case 2100VAC min.; Output/Case 1500VAC min.
Isolation Resistance 100 Ω min.
Switching Frequency Output ripple frequency 200 KHz Tpy.
Operating Case Temperature -40°C to 105°C
Storage Temperature -55°C to 125°C
Temperature at the center part of case, nonlatching 100°C Typ.
Humidity 95% RH max. Non Condensing
MTBF MIL-HDBK-217F, GB, 25℃, 5~54V 570~850Khrs typ.
Dimensions 2.28×1.45x0.50 inches(57.8x36.8×12.7 mm)
Case Material Plastic, DAP, UL 94V-0
Weight 66g

Model No. I/P Vol. O/P Vol. O/P Current O/P Watts (max.)
DUQB075-91-X 12~160VDC 5.00 VDC 15.0A 75W
DUQB075-92-X 12~160VDC 12.0 VDC 6.3A 75W
DUQB075-93-X 12~160VDC 15.0 VDC 5.0A 75W
DUQB075-99-X 12~160VDC 24.0 VDC 3.12A 75W
DUQB075-99C-X 12~160VDC 28.0 VDC 2.7A 75W
DUQB075-99D-X 12~160VDC 54.0 VDC 1.4A 75W
DUQB075-91N-X 12~160VDC 5.00 VDC 15.0A 75W
DUQB075-92N-X 12~160VDC 12.0 VDC 6.3A 75W
DUQB075-93N-X 12~160VDC 15.0 VDC 5.0A 75W
DUQB075-99N-X 12~160VDC 24.0 VDC 3.12A 75W
DUQB075-99CN-X 12~160VDC 28.0 VDC 2.7A 75W
DUQB075-99DN-X 12~160VDC 54.0 VDC 1.4A 75W


  1. Nominal Input Voltage 72 VDC
  2. Measured at Input Voltage 110VDC
  3. An External Input Capacitor 220uF for All Models are Recommended to Reduce Input Ripple Voltage.
  4. Remote ON/OFF Logic Compatibility.......Open collector Refer To -V Pin
    Suffix = Blank, Positive Remote Logic.
    Logic Low (Module OFF)................. 0 to < 1.2V
    Logic High (Module ON)................. 3.5 or open circuit to <160V
    Suffix = N, Negative Remote Logic. Logic High (Module OFF)................. 3.5 or open circuit to <160V
    Logic Low (Module ON)................... 0 to < 1.2V
    Suffix “-X” = -C, clear mounting insert (3.2mmDIA.)
    Suffix “-X” = -B, with Bus & External UVLO function
    Suffix “-X” = -C-B, clear mounting insert (3.2mmDIA.) and with Bus & External UVLO function
Mechanical Drawing (Unit: mm)


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