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Power supply 3-phase, 48 V dc Dimension Q Series

  • Output current of 10 A
  • Up to 94.8% efficiency
  • High short-circuit currents
  • Several protective filter
  • Maximum performance

Product description

Puls Dimension Q is a series of power supplies with very small construction dimensions and many technical advantages.
The unit has low inrush current (even during warm start), active PFC, which provides a power factor close to one, extended temperature range, as well as active protection against mains transients. Furthermore, there is a relay output (DC OK) that falls when the output voltage deviates more than 10% from the set value.
The bonus power provides 50% extra reserve with retained voltage which is an advantage when connected loads have high starting currents. The unit also provides a high short-circuit current that simplifies tripping of secondary fuses. Both the bonus power and short-circuit current is limited to 4 seconds to avoid constant overloading of the power supply and wiring.
High efficiency for long life and low temperature. The power supply can be connected for two-phase operation Within up to +40°C. At higher temperatures, the load current is reduced.


We recommend clearance of 40 mm and 20 mm below the unit and 5 mm on the sides. (15 mm on the sides if adjacent products are a heat source).



Bonus power

The power supply has a bonus power that enables high power output with maintained 48 V dc for 4 seconds, which is a big advantage when connected loads have high starting current, e.g. motors. How often you can use the bonus power depends on the application. With the diagram and formula below you can calculate the available repeat time for each application. Bonus power is available as soon as the power supply starts and immediately after a short circuit


Bonus power

Operating cycle

Bonus effect diagram power supply QT20.361/ QT20.481

Duty cycle diagram power supply QT20.361/QT20.481


Nominal load current


Peak current


Time between bonus power


Peak current I time

Operating cycle

Tpeak/ (Tpeak+To)


Tpeak- (operating cycle*Tpeak) / operating cycle

E.g. 48 V DC power supply Nominal load current (Po) is 7.5 A. Peak current (Ppeak) is 12A=120 %. Peak time is 3 seconds. 7.5 A=75 % of Inom. According to the diagram the operating cycle is 50%. To= 3- (0.5*3) / 0.5=3. Maximum repeat time of the bonus power is 3 seconds.



Power supply QT20.361 / QT20.481 3-phase for DIN-rails 36 V DC / 48 V DC Utström 13 resp. 10A


spinner symbol


Input voltage range Wide-range
Number of phases 3
Input voltage AC 380-480 V
Input voltage ac min 323 V AC
Input voltage ac max 552 V AC
Inrush current at 400 V ac typical 3 A
Power Factor at 400 V AC, full load. Typical 0,94
Supply Frequency 50-60 ±6 %
Power consumption at 400 V ac 0,79 A
Type Power Supply AC-DC
Output voltage 48 V DC
Output voltage min 48 V DC
Output voltage max 55 V DC
Output Current 10 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 At 400 V AC. Typical 94,4 %
Efficiency At 400 V AC, full load. Typical 95,4 %
Lifetime at 400 V ac, full load and +40 ° C 51000 h
MTBF (IEC 61709) 400 V ac, max loan, +40 °C 690000 h
Width 65 mm
Height 124 mm
Depth 127 mm
Weight 0,87 kg
Clamp type Spring-clamp
Series Dimension Q
Approvals CB, CE, CSA US, cRUus, cULus, EAC, GL
DC relay output Yes
Material Protection Aluminium
Hold-up time at 400 V AC, full load. Typical. 22 ms
IP Class IP20
Active Transient Yes
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