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DC-DC converter 600/24 V dc

600/24 V DC, 20 A

  • Optimized for intermediate DC-bus of Drive Systems
  • 20 A
  • 65 mm wide
  • Up to 95% efficiency
  • Integrated primary fuses

Product description

The DC-DC converter is optimized to connect on the frequency converter's dc bus/stage. This voltage is usually not filtered, has high EMI interference and leaves high leakage currents. The converter has a very robust input stage and filter, which provides safe operation even at very disturbing power supply. Duplicate 600V dc fuses are built-in, which saves space and money. At power outages, the motors act as generators and reset voltage to the frequency converter capacitors which, in turn, output voltage to the dc-dc converter. This means that 24V dc is maintained and a controlled stop can be performed.
The bonus effect gives 25% extra reserve with retained 24V which is an advantage when connected loads have high starting current.
The converter has polarity protection and minimal input current. In addition, there is a relay output (dc OK) that falls when the output voltage deviates more than 10% from the set value.


QTD20.241 Product photo.

Powersupply 480-840VDC/24VDC 20A

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Input voltage DC 600 V
Input voltage dc min 480 V DC
Input voltage dc max 840 V DC
Inrush current Typ. 1,6 A @ 600 V DC
Max entrance tripple 50 V pp
Type Power Supply DC-DC
Start-Up Delay 350 ms
Output voltage 24 V DC
Output voltage min 24 V DC
Output voltage max 28 V DC
Output Current 20 A
Effect 480 W
Power Reduction Of 60 To 70 ° C 12 W/°C
Ripple. max 100 mV pp
Temperature Range Without Derating From -25 °C
Temperature Range Without Derating To 60 °C
Efficiency 95 %
Life span 42000 h @ 24 V DC, 20 A, 40 °C
MTBF (IEC 61709) 446000 h @ 24 V DC, 20 A, 40 °C
Width 65 mm
Height 124 mm
Depth 127 mm
Weight 0,89 kg
Clamp type Spring-clamp
Series Dimension Q
Approvals CE, CSA, EAC, UL
DC relay output Yes
Material Protection Aluminium
Keep time Typ. 22 ms @ 600 V DC
IP Class IP20
Active Transient Yes
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