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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.

Parts Price


QTD20.241 Product photo.

PSU 600V dc I/P 24V dc 20A 480W O/P

Technical data

Input data

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

Output data

Output voltage 24 V DC
Output voltage min 24 V DC
Output voltage max 28 V DC
Output current 20 A
Power 480 W

Efficiency / Lifetime / MTBF

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


Approvals CE, CSA, EAC, UL
Keep time Typ. 22 ms @ 600 V DC
IP class IP20
Clamp type Spring-clamp
Material protection Aluminium
Ripple max 100 mV pp
Series Dimension Q
Power drop from +60 °C to + 70 °C 12 W/°C
Temperature min without derating -25 °C
Temperature max without derating 60 °C
Startup delay 350 ms
Type Power Supply DC-DC
DC relay output Yes
Active Transient Yes

Measurements and connections

Technical illustrations

  • Measurements (W x H x D mm) 65 x 124 x 127<br />We recommend free space of 40 mm above the unit, 20 mm below and 5 mm on the sides.

    Measurements (W x H x D mm) 65 x 124 x 127
    We recommend free space of 40 mm above the unit, 20 mm below and 5 mm on the sides.


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