Standard Features
• The DDH 300 features a switch selectable ‘low’ output voltage for working as a DC power supply and a ‘high’ output voltage which allows the user to float charge a lead acid battery from a battery.
• Galvanic Isolation between input and output (500V max.)
• Ambient Operating Temperature : 0-450C
• Efficiency: typically 80% at full load
• Substantial Input Filter
• Thermal protection by self-resetting trip. This operates when the heatsink reaches 900C and resets when the temperature drops to 700
• Indication for ‘output on’
• Low current on/off control input (<3mA sink to negative to turn on)
• Stabilised output voltage
• 2 :1 Input voltage range
• Fan cooled
• Weight : 1.8kg
• Dimensions : 242mm x 170mm x 65mm
• Input & Output Connections: Screw Terminals that accept up to 6mm2 cable
• Protection for :- reverse polarity on input and output
                               input under voltage (shutdown, auto re-start)
                               output over voltage (shutdown, auto re-start)
                               short circuit output (electronic current limit)

The Technology
The DDH300 range of DC-DC Converters use high frequency switched mode technology for high efficiency, small size and light weight.
‘Current Mode’ circuitry ensures reliable operation even for the arduous task of battery charging. Mosfet switching devices produce superb performance and only the highest quality components are used throughout.