PMT Series

  • 500V to 7.5kV @ 1.9 to 4 Watts
  • Low Cost Modular Design
  • Excellent Stability & Regulation
  • Low Noise & Ripple
  • CE Listed, UL Recognized and RoHS Compliant

DC-DC High Voltage Power Supplies

Spellman’s Bertan brand of PMT modular high voltage power supplies offer well regulated, fixed polarity outputs up to 7.5kV, which operate off a low voltage DC input voltage. These fully enclosed modules are specifically designed with proprietary linear power conversion tech­niques to provide exceptionally low ripple and noise. The PMT is ideal for precision applications including: photomultiplier tubes, solid state detectors and ultrasonic transducers. 

The output voltage can be controlled by either a local internal potentiometer or by a customer provided ground referenced signal for remote operation. Additionally a ground referenced output voltage monitor signal is provided. The PMT can be powered from either a single positive voltage source or a split ± voltage source, providing application flexibility.   

Typical applications:

  • Photomultiplier tubes
  • Ultrasonic transducers
  • Solid state detectors 

 CE ROHS RU Marking


(Ref. 128040-001 REV. T)

Input Voltage: 

Option 1: +24Vdc to +30Vdc @ 400mA

Option 3: ±12Vdc to ±18Vdc @ 400mA

specify “-1” (option 1) or “-3” (option 3) when ordering 


˜50%, typical 

Output Polarity: 

Positive or negative, specify at time of order 

Output Voltage: 

See “model selection” table 

Output Current: 

See “model selection” table 

Output Power: 

1.875W, 2W, 2.5W, 3W, 4W 

Voltage Regulation: 

Line: ±0.001% of rated output voltage for a 
+1% input line change 

Load:±0.001% of rated output voltage for a 
full load change


See “model selection” table


≤ 0.005% per hour, 0.02% per 8 hours, after a 1/2 hour warm up 


Remote Programming ±(2% of setting, +0.5% of maximum) Voltage Monitor ±2% 

Temperature Coefficient: 

≤ 50ppm/°C

Arc/Short Circuit:

All units are fully arc and short circuit protected and will limit continuous short circuit output current to less than 150% of maximum rated output current. 

Operating Temperature

0°C to +50°C

Storage Temperature: 

-40°C to +85°C


20% to 85% RH, non-condensing

Interface Connector: 

12 position card edge connector, mate provided with unit

Output Connector: 

A captive 24. (610mm) of RG-59B/U shielded cable, unterminated is provided


Convection cooled.


3.875.W X 1.25.H X 6.3125.D (98mm x32mm x 160mm)


≤ 2.0 pounds (0.9kg)

Regulatory Approvals:

Compliant to 2004/108/EC, the EMC Directive and 2006/95/EC, the Low Voltage Directive. UL/CUL recognized, File E137710. Compliant to 2002/95/EC, RoHS


Model Output Voltage Output Current Ripple (Vpp)
PMT-05C-P,N 0 to 500V 0 to 8mA 5mV
PMT-10C-P,N 0 to 1kV 0 to 4mA 4mV
PMT-20C-P,N 0 to 2kV 0 to 2mA 2mV
PMT-30C-P,N 0 to 3kV 0 to 1mA 6mV
PMT-50C-P,N 0 to 5kV 0 to 0.5mA 10mV
PMT-75C-P,N 0 to 7.5kV 0 to 0.25mA 100mV

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


Model Output Voltage Option 1 Pin Number Option 3 Pin Number
+ Power Input +24Vdc to +30Vdc or +12Vdc to +18Vdc 3&4 3 & 4 & 5
-Power Input -12Vdc to -18Vdc n/a 2 & 6
Ground Ground 1 & 12 1 & 12
Voltage Monitor See Voltage Monitor Table 11 11
+9Vdc Reference +9.0Vdc, 10mA maximum 10 10
Voltage Program Input 0 to 9Vdc = 0 to 100% rated output, 100kΩ Zin 8 8
Local Voltage Program Internal program potentiometer wiper, 0 to 9Vdc 9 9


Model Signal Voltage Signal Impedance
PMT-05C-P,N 0 to 5 volts 50k ohms
PMT-10C-P,N 0 to 1 volts 10k ohms
PMT-20C-P,N 0 to 2 volts 25k ohms
PMT-30C-P,N 0 to 3 volts 30k ohms
PMT-50C-P,N 0 to 5 volts 100k ohms
PMT-75C-P,N 0 to 7.5 volts 200k ohms

Note: The Voltage Monitor polarity matches the
high voltage output polarity 

Tables & Diagrams



PMT High Voltage Power Supply (Image 2)


PMT High Voltage Power Supply (Image 3)


PMT High Voltage Power Supply (Image 4)

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