INPUT/OUTPUT PROPORTIONAL HIGH VOLTAGE POWER SUPPLY
Well-shielded compact module
- Max Voltage: 0.3 kV to 25 kV
- Max Current: 0.1 mA to 20 mA
- Ultra-compact
- Lightweight
Suitable for Photomultiplier Tube, Microchannel plate and Radiation counter applications
The U3/U6/U10 series consists of input/output proportional high-voltage power supply modules designed for OEM integration. These compact, embedded modules are engineered for low noise and high reliability, making them an ideal choice for applications with stable loads, such as Photomultiplier Tubes (PMTs), Microchannel Plates (MCPs), and radiation detectors.
For floating applications, models up to 6 kV feature voltage isolation between the primary and secondary sides. With output power options up to 25 kV/10 W, the series offers both high-performance and general-purpose models to meet specific ripple requirements.
FEATURES AND BENEFITS
- Compact and Lightweight: Ultra-compact design ideal for OEM system integration.
- Proportional Output: Output voltage is directly proportional to the input voltage.
- Low Noise Performance: Optimized for precision measurement equipment.
- High Reliability: Built for long-term stability in demanding environments.
- Input/Output Isolation: Available on models up to 6 kV.
- Detachable Input Connector: Standard on most models (excluding C1 case type).
- Shielded Metal Case: Aluminum enclosure for enhanced shielding (excluding C1 case type).
APPLICATIONS
Models
U3 series (3 watts)
| Model | Output | Minimum Load | Ripple | I/O Isolation * [Vdc] | |
|---|---|---|---|---|---|
| Voltage | Current | ||||
| U3-0.3PN | +0.02 to +0.3/-0.02 to -0.3 kV | 10 mA | 0.03 MΩ | 0.12%p-p | 2000 V |
| U3-0.6PN | +0.04 to +0.6/-0.04 to -0.6 kV | 5 mA | 0.12 MΩ | ||
| U3-1.1PN | +0.1 to +1.1/-0.1 to -1.1 kV | 2.75 mA | 0.4 MΩ | ||
| U3-1.5PN | +0.1 to +1.5/-0.1 to -1.5 kV | 2 mA | 0.75 MΩ | ||
| U3A-2PN | +0.2 to +2/-0.2 to -2 kV | 1.5 mA | 1.3 MΩ | 2500 V | |
| U3A-3PN | +0.2 to +3/-0.2 to -3 kV | 1 mA | 3 MΩ | 3500 V | |
| U3A-6PN | +0.4 to +6/-0.4 to -6 kV | 0.5 mA | 12 MΩ | 0.15%p-p | 7000 V |
| Model | Output | Minimum Load | Ripple | I/O Isolation * [Vdc] | |
|---|---|---|---|---|---|
| Voltage | Current | ||||
| U3A-10P | 0.8 to 10 kV | 0.25 mA | 40 MΩ | 0.05%p-p | - |
| U3A-15P | 1.2 to 15 kV | 0.2 mA | 75 MΩ | ||
| U3A-25P | 2 to 25 kV | 0.1 mA | 250 MΩ | ||
| Model | Output | Minimum Load | Ripple | I/O Isolation * [Vdc] | |
|---|---|---|---|---|---|
| Voltage | Current | ||||
| U3A-10N | -0.8 to -10 kV | 0.25 mA | 40 MΩ | 0.05%p-p | - |
| U3A-15N | -1.2 to -15 kV | 0.2 mA | 75 MΩ | ||
| U3A-25N | -2 to -25 kV | 0.1 mA | 250 MΩ | ||
* I/O Isolation: The withstand voltage is the voltage value including the output voltage too.
U6 series (6 watts)
| Model | Output | Minimum Load | Ripple | I/O Isolation * [Vdc] | |
|---|---|---|---|---|---|
| Voltage | Current | ||||
| U6A-0.3PN | +0.03 to +0.3/-0.03 to -0.3 kV | 20 mA | 0.015 MΩ | 0.15%p-p | 2000 V |
| U6A-0.6PN | +0.05 to +0.6/-0.05 to -0.6 kV | 10 mA | 0.06 MΩ | ||
| U6A-1.1PN | +0.1 to +1.1/-0.1 to -1.1 kV | 5.5 mA | 0.2 MΩ | ||
| U6A-1.5PN | +0.1 to +1.5/-0.1 to -1.5 kV | 4 mA | 0.38 MΩ | ||
| U6A-2PN | +0.2 to +2/-0.2 to -2 kV | 3 mA | 0.65 MΩ | 0.2%p-p | 2500 V |
| U6A-3PN | +0.2 to +3/-0.2 to -3 kV | 2 mA | 1.5 MΩ | 3500 V | |
| U6A-6PN | +0.3 to +6/-0.3 to -6 kV | 1 mA | 6 MΩ | 7000 V | |
| Model | Output | Minimum Load | Ripple | I/O Isolation * [Vdc] | |
|---|---|---|---|---|---|
| Voltage | Current | ||||
| U6A-10P | 0.5 to 10 kV | 0.5 mA | 20 MΩ | 0.05%p-p | - |
| U6A-15P | 0.8 to 15 kV | 0.4 mA | 37 MΩ | ||
| U6A-25P | 1.4 to 25 kV | 0.2 mA | 125 MΩ | ||
| Model | Output | Minimum Load | Ripple | I/O Isolation * [Vdc] | |
|---|---|---|---|---|---|
| Voltage | Current | ||||
| U6A-10N | -0.5 to -10 kV | 0.5 mA | 20 MΩ | 0.05%p-p | - |
| U6A-15N | -0.8 to -15 kV | 0.4 mA | 37 MΩ | ||
| U6A-25N | -1.4 to -25 kV | 0.2 mA | 125 MΩ | ||
* I/O Isolation: The withstand voltage is the voltage value including the output voltage too.
U10 series (10 watts)
| Model | Output | Minimum Load | Ripple | I/O Isolation * [Vdc] | |
|---|---|---|---|---|---|
| Voltage | Current | ||||
| U10A-0.6PN | +0.06 to +0.6/-0.06 to -0.6 kV | 15 mA | 0.04 MΩ | 0.1%p-p | 2000 V |
| U10A-1.1PN | +0.1 to +1.1/-0.1 to -1.1 kV | 10 mA | 0.11 MΩ | 0.15%p-p | |
| U10A-1.5PN | +0.15 to +1.5/-0.15 to -1.5 kV | 8 mA | 0.19 MΩ | ||
| U10A-2PN | +0.2 to +2/-0.2 to -2 kV | 6 mA | 0.33 MΩ | 0.2%p-p | 2500 V |
| U10A-3PN | +0.3 to +3/-0.3 to -3 kV | 4 mA | 0.95 MΩ | 0.2%p-p | 3500 V |
| U10A-6PN | +0.6 to +6/-0.6 to -6 kV | 2 mA | 3 MΩ | 0.3%p-p | 7000 V |
| Model | Output | Minimum Load | Ripple | I/O Isolation * [Vdc] | |
|---|---|---|---|---|---|
| Voltage | Current | ||||
| U10A-10P | 1 to 10 kV | 1 mA | 10 MΩ | 0.2%p-p | - |
| U10A-15P | 0.15 to 15 kV | 0.6 mA | 25 MΩ | 0.08%p-p | |
| U10A-25P | 2.4 to 25 kV | 0.33 mA | 75 MΩ | ||
| Model | Output | Minimum Load | Ripple | I/O Isolation * [Vdc] | |
|---|---|---|---|---|---|
| Voltage | Current | ||||
| U10A-10N | -1 to -10 kV | 1 mA | 10 MΩ | 0.2%p-p | - |
| U10A-15N | -0.15 to -15 kV | 0.6 mA | 25 MΩ | 0.08%p-p | |
| U10A-25N | -2.4 to -25 kV | 0.33 mA | 75 MΩ | ||
* I/O Isolation: The withstand voltage is the voltage value including the output voltage too.
Specifications
- Input voltage
- 2 to 15 Vdc (U3 series), 2 to 24 Vdc (U6 series), 3 to 24 Vdc (U10 series)
- Output voltage control
- The output voltage is proportional to the input voltage (I/O Proportional)
Accessories
Additional Accessories
- CN3U
-
Assembled input 3-pin connector with 0.25 meters flying leads
- CN8U
-
Assembled input 8-pin connector with 2-wire 0.25 meters flying leads
Diagrams
Connection Diagrams
Dimensions
60.5 x 26 x 24 mm (2.38" x 1.02" x 0.94")
76 x 30 x 27 mm (2.99" x 1.18" x 1.06")
91 x 35 x 31 mm (3.58" x 1.38" x 1.22")
110 x 50 x 31 mm (4.33" x 1.97" x 1.22")
110 x 70 x 32 mm (4.33" x 2.76" x 1.26")
120 x 100 x 35 mm (4.72" x 3.94" x 1.38")
For details, download the datasheet below.
Others
Input/Output Proportional Characteristics
Input vs. Output Voltage Calculation
Calculation example of connecting rated load RL
Input Current Calculation
Input current is defined by giving an output voltage and an output current.
See the calculation at an efficiency of approximately 65%.
Application notes
General Usage Guidelines
- For models 6 kV or less, the case (blue lead wire), input (black lead wire), and output are not connected internally. For safety reasons, always connect the case, input, and output to the ground.
- For models 10 kV or more, the case (no lead wire) and input (black lead wire) are internally connected. For safety reasons, always connect the input to the ground. The * part in the figure below is not present on models of 10 kV or more.
- If the output is used as floating, refer to High-Voltage Floating Applications.
- U3: up to 15 V
- U6, U10: up to 24 V
- Before operating the product, make sure that the wiring is properly connected to it, as shown in the figure above.
- Apply the specified input voltage and set the voltage.
- Models of U3, 6 kV or less, do not have a discharge resistor built into the output. When using such a model with capacitive loads, etc., install a discharge resistor in the output.
- When quitting the operation of the product, turn off the input power.
Output Voltage and Current Monitoring
- C = 0.1 to 1 µF pass capacitor
- Instead of using a voltmeter or ammeter, insert a resistor as shown in the figure and measure the voltage at both ends of the resistor with a Digital Voltmeter.
Parallel Operation to Increase Output Current
- Valid only for the same model
- Do not parallel different models.
Output Ripple Reduction
- L = 1 m to 5 mH: A resistor is also available.
- C = 0.01 µF to 0.1 µF: Pay attention to withstand voltage.
Input Ripple Suppression
- Ground at one point.
- L = 100 µH or more
- C = 100 µF/35 V or more
Generating Required Input Voltage for Output Voltage
When load regulation is large.
This circuit can also reduce the noise generated on the input power source.
When load regulation is small.
Install a capacitor with approx. 0.01 µF to 0.1 µF on the output side to reduce the ripple on the output voltage.
Pay attention to withstand voltage.
Floating Use with High-voltage
- Models of 6 kV or less are input/output isolated. Therefore, they can be used with the output floating.
- For models of 6 kV or less, the case (blue lead wire), input (black lead wire), and output are not connected internally.
- For safety reasons, always connect the case and input to the ground.
- U3: up to 15 V
- U6, U10: up to 24 V
The Ef + Eout is less than or equal to the value of "I/O Isolation" shown on the Models.
- Before operating the product, make sure that the wiring is properly connected to it, as shown in the figure above.
- Apply the specified input voltage and set the voltage.
- When floating the output, lower the Ef impedance because the common-mode noise may occur.
- When quitting the operation of the product, turn off the input power.
NOTE
- This product is an embedded power supply, which has been designed and produced with full consideration for high-voltage safety. For further safety, ground it according to General Use and Floating Use with High-voltage.
- Avoid short-circuiting the load for long periods of time.
- Do not touch the output just after turning the product off, because high voltage may still present at the output. If you need to touch it, check with a voltmeter or similar device that the output voltage has dropped sufficiently, or wait until at least 20 minutes have passed. If the load is an open or capacitive load, the output voltage may not drop for a long time, so if you must touch it, be sure to discharge the output.
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-
U3/U6/U10 series Datasheet
Date: 2025-05-01 rev 13
PDF (1,246 KB)
-
High Voltage Power Supply Modules Selection Guide
Date: 2026-01-28 rev 19
PDF (4,914 KB)
-
Safety and Usage of High voltage Power supply
Date: 2025-09-08 rev 04
PDF (602 KB)
-
U3/U6/U10 series 3D MODELS (STEP, IGES)
Date: 2024-06-14
ZIP (2,095 KB)
Login Required
-
U3/U6/U10 series Datasheet
Date: 2025-05-01 rev 13
PDF (1,246 KB)
-
High Voltage Power Supply Modules Selection Guide
Date: 2026-01-28 rev 19
PDF (4,914 KB)
-
Safety and Usage of High voltage Power supply
Date: 2025-09-08 rev 04
PDF (602 KB)
-
U3/U6/U10 series 3D MODELS (STEP, IGES)
Date: 2024-06-14
ZIP (2,095 KB)
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