Released 2008
Warranty Period 5-year

* When remote ON/OFF is not used, short RC1 and -VIN.
* When the output voltage adjustment is not used, open the
TRM pin respectively.
* When remote sensing is not used, make sure +VOUT and +S are shorted, and that -VOUT and -S are shorted as well.

Features of DBS700B28

• Ideal for distributed power systems
• Thin and small size
• Built-in overcurrent, overvoltage and thermal protection circuits
• Built-in remote ON/OFF (On both side of input and output)
• Inverter operating monitoring (IOG)
• Mounting hole (M3 tapped)
• N+1 redundant operation
• The beet noise is decreased by installing of the crystal oscillator

Ordering Information and Options

DB(1)  S(2)  700(3)  B(4)  28(5)  

(1) Series name
(2) Single output
(3) Output wattage
(4) Input voltage
    B: DC200 - 400V
(5) Output voltage
(6) Optional
    T: with Mounting hole
      (φ3.4 thru)


Contents Specifications
Input Voltage DC200 - 400V
Output Wattage 700W
Voltage/Current 28V 25A
Adjustable  Voltage Range Fixed (TRM pin open), 60 - 110% adjustable by external VR or external voltage
Protection Circuit And Others Overcurrent Protection Works over 105% of rating and recovers automatically
Overvoltage Protection 32.20 - 39.20V
Remote ON/OFF Provided (On both side of input and output)
Remote Sensing Provided
Others -
Operating Temperature/Humidity -40 to +100℃ (On aluminum base plate) , 20 - 95%RH (Non condensing) *
Safety And Noise Regulations Agency Approvals (At only AC input) UL60950-1, C-UL, EN62368-1
Conducted Noise -
High Attenuation -
Others Dimensions (WxHxD) 61x12.7x116.8mm [2.4x0.5x4.6 inches]
Weight 180g max
Cooling Method Conduction cooling (e.g. heat radiation from the aluminum base plate to the attached heat sink)
Warranty Period 5-year
  • * For further information and how to use, please see in Cosel product catalog.

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Technical Data
  • * For another documents aren't listed, please feel free to contact to a Cosel representative.
Table1 Product Status Information
No. Product Status Definition
1 New Product New Product. Recommended for new design.
2 Recommended Recommended for new design.
3 blank Product in mass production
4 NRND Not recommended for new design.
5 To be discontinued PDN (Product Discontinuation Notice) is issued and LTB (Last Time Buy) is under consideration.
6 Discontinued LTB order is no longer available.