Steca Elektronik Catalog PV Off Grid (06|2018)

STECA MDC / MDCI
DC-DC-voltage converters
DC-DC voltage converters are used when the DC-output voltage of the PV
system does not match the requirements of the appliance.
Since a voltage level of 12 V is required for most low-voltage appliances such
as lamps, multimedia devices, radios or mobile phones, the various models
of the voltage converters deliver a stable supply of 12 V. For instance, if a 12
V energy-saving light is operated in a 24 V or 48 V system, then a suitable
DC-DC voltage converter must be inserted between the load output of the
charge controller and the 12-V energy-saving light.
The Steca MDC and MDCI voltage converters are designed for use in photovoltaic
systems. The models with an output voltage of 13.8 V can also be
used as battery chargers for a 12 V battery in a 24 V system.
For safety reasons, the Steca MDCI series is electrically insulated to protect
the user. Both the Steca MDCI and the Steca MDC series are protected against
high voltage spikes at the input, thus preventing harmful voltage spikes at the
input of the loads.
Steca MDCI 100
49
152
4x ø5
Product features
43
88
∙∙High efficiency
∙∙Automatic detection of voltage
22
∙∙Wide input voltage range
∙∙Best reliability
∙∙Parallel switching of up to two MDCI
Steca MDCI 360
7
138
Electronic protection functions
∙∙Overtemperature and overload protection
∙∙Reverse polarity protection
∙∙Short circuit protection
Certificates
∙∙Compliant with European Standards (CE)
∙∙Made in EU
160
4x ø6
154 64
163
70 W...360 W
108
21
4
MDC
MDCI
2412-5 2412-8 2412-12 2412-20 2412-30 1224-7 100 200 360
Characterisation of the operating performance
Nominal power 65 W 105 W 160 W 275 W 415 W 170 W 100 W 200 W 360 W
Max. efficiency 90 % 85 %
DC input side
Input voltage 18 V … 35 V 20 V … 35 V 9 V … 18 V 9 V … 18 V / 20 V … 35 V /
30 V … 60 V / 60 V … 120 V
DC output side
Output voltage 13.2 V 13.8 V 24 V 12.5 V / 24.5 V
Output current 5.5 A 8 A 12 A 20 A 30 A 7 A 8 A / 4 A 16.5 A / 8 A 30 A / 15 A
Operating conditions
Ambient temperature -20 °C ... +40 °C -20 °C ... +45 °C
Fitting and construction
Galvanic isolation no yes
Dimensions (X x Y x Z) 87 x 55 x 49 mm 87 x 85 x 49 mm 87 x 115 x 49 mm 87 x 125 x 49 mm 87 x 115 x 49 mm 88 x 152 x 49 mm 88 x 182 x 49 mm 163 x 160 x 64
mm
Weight 170 g 250 g 260 g 480 g 600 g 300 g 500 g 600 g 1.4 kg
Cooling principle convection fan convection convection fan
Technical data at 25 °C / 77 °F
46