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• Fully adjustable output voltage
• Worldwide input voltages/frequencies
• Full remote control
• Simple parallel operation for upgradeable increased power
• Rep. rates to 1 kHz
• 5kJ/sec peak charge rate
• Compact lightweight design
• Constant charge rate independent of line voltage
• Meets UL, CSA, VDE, safety standard
• Extremely low stored energy
• Protected against open circuit, short circuit, arc, overtemp, over-voltage

• Excimer Lasers
• Pulsed YAG Lasers
• Lithotriptors
• Precipitators
• General Medium Power PFN's
• Grid Bias Supplies
• N2 Lasers
• Dye Lasers
• TEA Lasers

202A - 2kJ/sec or 2kW DC
802 - 8kJ/sec or 8kW DC

APP Note 500: Calculating Capacitor Charge Time
APP Note 502: Calculating AC Line Currents
APP Note 505: Charging units as Continuous Output DC  Supplies
APP Note 507: Charging Large Load Capacitors
APP Note 509: What is Regulation and Repeatability?
APP Note 513: Power Factor Correction
APP Note 517: Protection Against Voltage Reversal
Appn. Questionnaire

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ALE Model 402
Programmable High Voltage Capacitor Charging and DC Power Suplies
Output Voltages: 0-1kV to 0-50kV at 4,000J/sec average power or 4,000W DC
Click here to request more ALE 402 Information

  • Overview
  • Technical Details
  • Technical Support

Product Overview and Models

The 402 Series is a Compact rack mount constant current capacitor charging or DC power supply with output voltages available from
to 0-50kV, 208VAC or 400VAC+N three phase input, with fully instrumented front panel (L model), or optional Slave/OEM versions.


  Capacitor Charging Ratings   Continuous DC Ratings    
Model Number Output

Cap Charging

Cap Charging



DC Power

DC Current (Amps)



402L-1kV-POS 0-1,000   4,000 5,000 10   4,000 4  
402L-2kV-POS 0-2,000   4,000 5,000 5   4,000 2  
402L-4kV-POS 0-4,000   4,000 5,000 2.5   4,000 1  
402L-5kV-POS 0-5,000   4,000 5,000 2   4,000 0.8  
402L-10kV-POS 0-10,000   4,000 5,000 1   4,000 0.4  
402L-15kV-POS 0-15,000   4,000 5,000 0.65   4,000 0.26  
402L-20kV-POS 0-20,000   4,000 5,000 0.5   4,000 0.2  
402L-30kV-POS 0-30,000   4,000 5,000 0.33   4,000 0.13  
402L-40kV-POS 0-40,000   4,000 5,000 0.25   4,000 0.1  
402L-50kV-POS 0-50,000   4,000 5,000 0.2   4,000 0.08  
Other Voltage Available on Request, please contact factory for details.


Ordering Information





  Input Voltage  

Factory Options


L - 15kV - POS - 3P208 for 208VAC - 5V
  S           3P400 for 400VAC   LP
  OEM               CT

The ALE 402 series of high voltage switching power supplies is designed to quickly charge capacitors and pulse forming networks in lasers and general modulators. Advanced semiconductor technology combined with high quality construction, yields an exceptionally small and reliable power supply which has set the industry standard for many years.

With many standard features and options, this series is useful in a wide variety of OEM and laboratory applications. Designed for continuous use in severe electrical environments, these air cooled power supplies provide an average charging rate of 4 kJ/sec over nine output voltage ranges from 1kV to 50kV, with either positive or negative output polarity. Output control and status monitoring are easily accomplished with the standard remote interface or the optional front panel controls.

For more information about the 402 Power Supply Series, contact the TDK-Lambda Americas Programmable and High Voltage team directly at +1-732-795-4100 or online at -

A wide range of other TDK-Lambda Programmable and High Voltage power supplies can be viewed from the website:


AC Input
Input Voltage
180-264, 47-63Hz, 3ph 20A
340-460, 47-63Hz, 3ph+N 15A

Average Charging Rate
4,0000 J/s at rated Output Voltage.

Peak Charging Rate
5,000 J/s at rated Output Voltage.

Average Continuous DC Power
4,000 Watts

Standard Voltage Ranges
1, 2, 4, 5, 10, 15, 20, 30, 40, 50kV.
All models continuously variable from 10 to 100% of rated voltage output.
Linear to within 1% of full scale.
Accuracy 1% of rated.

Available as fixed Positive or Negative, Please Specify.

High Voltage Assembly
Voltage Medium Output Cable
(Air Option)
Air RG-8/U
1 to 39 kV Oil DS2124
40 to 50 kV Oil DS2214

Input Connector
VDE, UL, CSA, approved.

AC Line Contactor
VDE, UL, CSA, approved line contactor (Standard on 402L. 402S, option on 402OEM).

Power Factor
Passive PFC 0.85 min

Better than 85%

Stored Energy
Less than 0.3 Joules all models.

0.2% per hour after 1 hour warm-up.

Pulse to Pulse Repeatability
+/- 2% to 1kHz. For higher repetition rates, consult factory

Temperature Coefficient
100 PPM per °C

Ambient Temperature
Storage: -40 to +85 °C
Operating:0 to +45 °C

10-90% Non-condensing

The power supply is protected against open circuits, short circuits, overloads and arcs.

Width: 19"(482mm)
Depth: 17"(432mm)
Height: 7"(178mm)
Weight: 65lbs, 30kg

Rack mountable with General Devices
CTS-122 or CTS-222 or equivalent slides with 3.875" hole centers

Click here for mechanical details
Shipping Details:
Wooden skid (freight shipment only)
Width: 29"(0.74m)
Length: 26"(0.66m)
Height: 18"(0.46m)
Weight: 130lbs, 65kg

Accessories (included with unit)
1-39kV Models - 10ft long, DS2124 coaxial cable with proprietary connector design
40-50kV Models - 10ft long, DS2214 coaxial cable with proprietary connector design
Operating manual

Remote Control
Via 25pin d-type connector on rear panel. Click here for details


Suffix-5V 0 to +5V programming = 0 to full scale output voltage (standard 0-10V)
Suffix-LP Latching Overload Protection.
Supply will latch off, requiring a reset if an overload condition occurs.
Suffix-CT Optional internal contactor for OEM only (standard on L/S models)
Suffix-DC Continuous DC output

What's in the Box
Power Supply
HV Output Cable Assembly
User Manual CD
Test Data Sheet

All specifications subject to change without notice.
Factory Technical Support Contacts

High Voltage Products - 1000V and higher
All ALE models, 500A, 102A, 152A, 202A, 402, 802, LC1202, 203, 303, HV Systems
PHV and FLX-HV High Voltage DC Models
Support Hours 8am-5pm Eastern
Standard Time
Andy Tydeman - Email
Tel: (732) 795 4149
Fax: (732) 455 6026
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