Programmable flexible DC power supply

The SM3300 Series consists of power supplies with excellent efficiency, stability and flexibility. Thanks to the auto-ranging power output, one power supply can cover two ranges of traditional power supplies with an rectangular VI-curve. For even more flexibility, the SM3300 series can be used at both single phase as three phase grid power.

Standard, the SM3300 series can be controlled via the front, web interface or ethernet. This connectivity can be expanded at any time by our interface cards. Furthermore, the Master/slave interface allows parallel operation of up to 8 units.


cTUVus Certification

The SM3300 series is certified according to the UL 60950-1:2007 R12.11 standard. This certification by the reputable TÜV Rheinland is a confirmation of the high safety and quality standard of Delta Elektronika. This certificate combined with Delta Elektronika's reputation of long term product availability and product support turns the SM3300 series into excellent power supplies for larger systems. 

Unit Voltage Current VI-curve
SM 18-220
0 - 18 V
0 - 220 A
SM 66-AR-110
0 - 33 V
0 - 66 V
0 - 110 A
0 - 55 A
SM 100-AR-75
0 - 50 V
0 - 100 V
0 - 75 A
0 - 37.5 A
SM 330-AR-22
0 - 165 V
0 - 330 V
0 - 22 A
0 - 11 A
SM 660-AR-11
0 - 330 V
0 - 660 V
0 - 11 A
0 - 5.5 A


  • Designed for long life at full power
  • Excellent dynamic response to load changes
  • Protected against all overload and short circuit conditions
  • EMC surpasses CE requirements: low emission and high immunity
  • Low audible noise: fan is temperature controlled
  • Automatic coarse and fine adjusting buttons


  • Operation on single and three-phase input voltages
  • Standard Ethernet Interface including sequencer
  • Large user display, menu-driven operation
  • Durable digital encoders for voltage and current adjustment
  • Plug & Play optional interfaces


  • Input voltage (single and 3 phase): 180-528 VAC (single or 3 phase 48-62 Hz), derating at low input voltage
  • Active Power Factor Correction (PFC): up to 0.99 (at 100% load)
  • Efficiency: up to 92% (at full load)
  • Output ripple and spikes: from 3 mVRMS / 12 mVPP
  • Regulation: from 2.5 mV
  • Recovery time: from 100 µs (50-100% load step)
  • Programming speed: from 1.6 ms (10-90%), optional from 0.2 ms
  • Output voltage and current stability: 6.10-5 / 9.10-5
  • MTBF: 500 000 hrs
  • Operating ambient temperature: -20 to +50 ºC


  • Emission: EN 61326-1 (class B equipment, for use in domestic establishment)
  • Immunity: EN 61326-1 (equipment for use in industrial and domestic establishment)
  • Safety: EN 60950-1 / EN 61010-1 / cTÜVus
  • Insulation input / output: 3750 VRMS (1 min.)
  • Protection class: IP20

Dimensions and weight

  • Width:19 inch
  • Height: 2 U
  • Depth: 455 mm
  • Weight: 15 kg
Dimensions SM3300


Optional factory installed features

High Speed Programming
High Speed Programming

A 10 to 20 times higher programming speed and lower output capacitance. Excellent for laser applications, fast test systems or as current source with low parallel capacitance as used in plasma chambers. For more information, download the data sheet High Speed Programming.

2-Quadrant Output: Power Sink
2-Quadrant Output: Power Sink

The 2-quadrant operation maintains the output voltage constant regardless the output power is positive or negative. Ideal for PWM-speed controlled DC-motors and ATE-systems. For more information, download the data sheet Power sink.


Add-on interfaces to be added at any time

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Application notes Type/Format Size
Application note Safe operation pdf 364.71 KB
Application note Battery charging pdf 54.34 KB
Software Type/Format Size
DE Applications bundle description pdf 104.29 KB
DE Applications zip 417.72 MB
Example Code and Software zip 168.81 KB
Firmware Type/Format Size
Release notes firmware update SM3300 series pdf 61.06 KB
Latest Firmware update SM3300 series zip 7.31 MB
3D drawings Type/Format Size
3D drawings SM3300 series zip 2.58 MB
Compliance Type/Format Size
ROHS pdf 121.96 KB
REACH pdf 122.77 KB