75W DIP Type High Input DC/DC Converter : DHQB075

DHQB075 - 75 Watts Quarter Brick Type 2:1 High Input Voltage Isolated DC - DC Converters


Regulated Output DC-DC Converter- Isolation - Module

Our DHQB075 series is fire & smoke EN45545 and shock & vibration MIL-STD-810F compliant. The dimension is 2.28" x 1.45" x 0.5" meet industrial standard quarter brick size. They provide a 300Vdc nominal input (with an input range of 180 to 450Vdc) and 3000VAC reinforced isolation, which are suitable for distributed power architectures, telecommunications, servers, base station, battery operated equipment, and industrial applications.
  • Efficiency Up to 90%
  • Fixed Switching Frequency
  • 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℃
  • -55℃ Operating Available
  • Quarter Brick Size Meet Industrial Standard 2.28" x 1.45" x 0.5"
  • Shock & Vibration MIL-STD-810F Compliant
  • Fire & Smoke EN45545 Compliant
  • 3000m Operating Altitude
Input Voltage Range Nominal 300V Range: 180-450V
Under voltage Lockout power up ... 170V ; power down ... 160V
Remote On/Off Logic Refer to –Vin pin.
Positive Remote Logic.
Logic Low Module OFF .................< 1.2V
Logic High (Module ON).................. 3.5~75V
Negative Remote Logic.
Logic High (Module OFF)................. 3.5~75V
Logic Low Module ON .................< 1.2V
Input Filter PI Filter.
Voltage Accuracy ± 1% max.
Transient Response 75%-100% Io_max step load change, di/dt = 0.1A/µs
Error Band ...±5% Vout
Recover Time ... 250 µs
Output Voltage Remote Sense Range 3.3V&5V...+10%; Others...+20%
R&N (5Hz to 20MHz bandwidth Note 4) 3.3&5V.................... 60mV RMS, 100mV pk-pk, max.
12V&15V ............... 60mV RMS, 150mV pk-pk max.
24V&28V ................100mV RMS, 240mV pk-pk max.
Temperature Coefficient ± 0.02% / °C max.
Short Circuit Protection Continuous, Auto Recovery.
Line Regulation (Full Load to No Load) ± 0.2% max
Load Regulation (High Line to Low Line) ± 0.2% max
Over Voltage Protection (Limited voltage, % of Nominal Vo) 3.3V&5V...112% ~ 130%; Others...122% ~ 130%
Over Current Protection Hiccup Mode. Auto Recovery. 110% ~ 160%
Isolation Voltage Input/Output : 3000VAC min.,
Input/Case : 2500VAC min.,
Output/Case : 500VAC min.
Isolation Resistance:: 100M Ω min.
Isolation Resistance 100MΩ min
Switching Frequency Pulse wide modulation (PWM), Fixed::300 KHz Tpy.
Operating Case Temperature -40°C to 105°C
Storage Temperature Range -55°C to 125°C
Over Temperature Shutdown Temperature 110°C Typ. at the Center Part of Base Plate, Non-Latching.
Humidity 95% RH max. Non Condensing
MTBF MIL-HDBK-217F, GB, 25℃, 48V... 1050Khrs typ.; Others … 850Khrs typ.
Case Material Aluminum Base Plate with Plastic Case
Dimensions 2.28×1.45x0.50 inches(57.9x36.8×12.7 mm)
Weight 61g

Model No. Input
No Load
Load Max.
DHQB075-C0xyz 180-450 3.3 15.0 10mA 81.5 15000μF
DHQB075-C1xyz 180-450 5 15.0 10mA 83.5 15000μF
DHQB075-C2xyz 180-450 12 6.25 10mA 88.0 6250μF
DHQB075-C3xyz 180-450 15 5.0 10mA 90.0 5000μF
DHQB075-C9xyz 180-450 24 3.12 10mA 90.0 3300μF
DHQB075-C9Bxyz 180-450 48 1.56 10mA 89.0 1000μF

Ordering Information:

  1. x = blank stands for Remote On/Off Logic Positive
    x = N stands for Remote On/Off Logic Negative
    y = blank stands for M3.5x0.5 mounting inserts
    y = C stands for Clear mounting insert (3.2mm DIA)
    z = blank stands for -40~105℃ operating temp.
    z = L stands for -55~105℃ operating temp.
  2. Nominal input voltage 300VDC.
    Measured at 300Vin.
  3. An external input capacitor 33uF for all models are recommended to reduce input ripple voltage.
  4. -55°C start-up screen per MIL-STD105E S1 Sampling Procedure for L Version.
Mechanical Drawing (Unit: mm)


View Picture
Selected Items
Purchasing Quantity
Purchasing Schedule
Information of Contact Person
Company Information

( Including http:// )

Inquiry Detail

By submitting your contact information, you acknowledge that you consent to our processing data in accordance with the Privacy and Cookie Policy.