MS High Voltage Power Supply (featured image)

MS Series

  • Low Cost
  • Output Voltages up to 3kV
  • 3 Watts Power Rating
  • Positive or Negative Polarity
  • Arc and Continuous Short Circuit Protected
  • Low Stored Energy
  • High Reliability
  • Internal 5V Reference
  •  OEM Customization Available

*Note: All specifications are subject to change without notice. Please consult the English PDF version of this datasheet for the most up-to-date revision.

CE ROHS Marking

3W DC-DC High Voltage Power Supplies

Spellman’s MS Modules have been designed for printed circuit board mounting with high reliability, small size and light weight. Each module provides 3W of output power to 3kV with well regulated low ripple, high stability and high voltage in a versatile, compact cost-effective design. The modules incorporate remote control and arc & short-circuit protection. Radiated pickup is eliminated by sealing each module in an aluminum enclosure.

Typical applications:

  • Photomultiplier Tubes
  • Precision Lenses
  • Image Intensifiers
  • Nuclear Instruments
  • Spectroscopy


(Ref. 128018-001 REV. L)

Input Voltage:

+12Vdc ±1V. Other input voltages also available.;

Input Current: 

< 0.56A at full output.

Output Voltage: 

Continuously adjustable over each entire range Models available in either positive or negative polarity. See table for voltage ranges. 

Line Regulation: 

< 0.005% for input change of 1V

Load Regulation: 

< 0.05% for 100μA to full load change. (at max. voltage)

Output Voltage Control: 

Remote voltage programming such that 0-5Vdc 
gives 0 to full rated output 

Output Power: 3W continuous. 

Voltage Regulation:

Line: 0.005% for input change of 1V
Load: 0.05% for 100µA to full load change at maximum voltage.

Ripple: < 0.01% p-p of full output voltage.

5Vdc Reference: +5.0V (±0.2V). A maximum of 1mA can be drawn from this output. 


Operating: 0°C to +50°C. 
Storage: -35°C to +85°C. 

Temperature Coefficient: 50ppm/°C typical. 


 < 0.05%/8 hrs at constant operating conditions after one hour warm-up. 

Humidity: 0 to 90% non-condensing. 


Up to 1000Vdc: .87”H x 2.1”W x 3.1”D (23mm x 53mm x 78mm). 
1000V to 3000Vdc: 1.1”H x 2.36”W x 4.2”D (28mm x 60mm x 106mm). 


Up to 1000V: 0.2lb (80g). 
Over 1000V:  0.4lb (160g). 

Regulatory Approvals: 

Compliant to EEC EMC Directive. Compliant to EEC Low Voltage Directive.


I - Isolated Input to Output

Isolation Voltage: 40V for units up to 1kV

100V for units >1kV


Output Voltage (V) Output Current (mA) Ripple V (p‑p) Model
300 10 0.03 MS0.3*
500 6 0.05 MS0.5*
750 4 0.075 MS0.75*
1000 3 0.10 MS1*
1500 2 0.15 MS1.5*
2000 1.5 0.20 MS2*
2500 1.2 0.25 MS2.5*
3000 1 0.30 MS3*

*Specify “P” for positive polarity or “N” for negative polarity.

Tables & Diagrams




 MS High Voltage Power Supply Image 2


MS High Voltage Power Supply Image 3 

UNIT > 1000V UP TO 3000V


MS High Voltage Power Supply Image 4 


MS High Voltage Power Supply Image 5 


Frequently Asked Questions

What Is a Safe Level of High Voltage?
Where Can I Obtain Information on High Voltage Safety Practices?
How Should I Ground Your Supply?
Why Is Arcing an Issue for a High Voltage Power Supply?