400V variable DC power supplies provide adjustable 0–400V output for laboratory bench tests and equipment development. Compare ETOMMENS 2A, 3A, 5A and 10A models, two-knob or four-knob controls, and available interface options. Use the 400V model comparison to match your working voltage, current and continuous power, then select a product to order online.
400V DC Power Supply Model Comparison
| Model | Voltage range | Current range | Controls / display | Order online |
|---|---|---|---|---|
| eTM-4005C | 0–400V | 0–5A | Two-knob controls | View Product |
| eTM-4003C | 0–400V | 0–3A | Two-knob controls | View Product |
| eTM-4003 | 0–400V | 0–3A | Four-knob encoder controls | View Product |
| eTM-40010C | 0–400V | 0–10A | Two-knob controls | View Product |
| eTM-4002C | 0–400V | 0–2A | Two-knob controls | View Product |
| eTM-40010 | 0–400V | 0–10A | Four-knob encoder controls | View Product |
| eTM-4005 | 0–400V | 0–5A | Four-knob encoder controls | View Product |
| eTM-4002 | 0–400V | 0–2A | Four-knob encoder controls | View Product |
Choose a 400V Model for Your Load
Circuit checks requiring up to 2A or 3A
Compare eTM-4002 and eTM-4002C for 0–2A, or eTM-4003 and eTM-4003C for 0–3A. Adjustable output supports testing at different DC input operating points. Include start-up current and power at each voltage; at 300V, a 3A load requires 900W.
Load tests requiring up to 5A
eTM-4005 and eTM-4005C list 0–5A current ranges. A load at 400V and 5A requires 2000W. Compare the continuous output capability, installation input and front-panel controls for that combination. The C model offers interface options for computer-controlled test setups.
Higher-current tests requiring up to 10A
eTM-40010 and eTM-40010C list 0–10A. A 300V, 10A load requires 3000W; at 400V it requires 4000W. These are load-power requirements, not separate product ratings. Match the selected supply’s continuous operating capability and AC input to the actual test point.
Features for Bench Testing
- Adjustable voltage and current: all eight compared models specify continuously adjustable 0–400V output with 2A, 3A, 5A or 10A current ranges.
- Automatic CV/CC operation: voltage is regulated in CV mode; when the current limit is reached, CC mode regulates current and voltage can decrease.
- Control layouts: models without C use four-knob encoder adjustment. C models use two knobs and list output switch control.
- Five protective functions: model specifications list overvoltage, overcurrent, overpower, overtemperature and short-circuit protection.
- Interface options: the eTM-4005C product options include RS232, RS485, USB and RS232 plus analogue control. Choose the interface needed for the test software.
400V Bench Power Supply FAQs
Which 400V DC power supply should I choose for 2A, 3A, 5A or 10A?
Compare the 4002/4002C pair for 2A, 4003/4003C for 3A, 4005/4005C for 5A and 40010/40010C for 10A. Start with the current at each voltage and during start-up, then choose the continuous power, control layout and available configuration.
My load needs 400V and 5A. Which models should I consider?
The load requires 2000W. Compare eTM-4005 and eTM-4005C, which list 0–400V and 0–5A ranges. Confirm the continuous output and input configuration for 400V and 5A together; the maximum current alone is not a complete power specification.
Can a 400V supply operate at 200V or 300V?
Yes. The listed models specify continuously adjustable 0–400V output. At 300V and 3A, the load requires 900W. Compare eTM-4003 and eTM-4003C for that current range, then check continuous output and any start-up demand.
How do two-knob and four-knob models differ?
The C models have two-knob controls and list output switch control. Models without C use four-knob encoder adjustment. Compare eTM-4005 with eTM-4005C for the same voltage/current range with different manual controls and product options.
Can I automate a 400V test with RS232 or USB?
The eTM-4005C product page offers RS232, RS485, USB and RS232 plus analogue control. Select the interface and confirm command support for your software; these choices are not all included in the base configuration.
Can I select 110V input for a 400V, 5A load?
That load requires 2000W. The eTM-4005C product page limits its 110–130V input option to output power of 1200W or less, so that option does not cover this requirement. Choose an input and output configuration rated for the required working point.
Why does output voltage decrease when the current limit is reached?
In CC mode, the supply regulates current at the selected limit, so output voltage can decrease as the load changes. The compared models list automatic CV/CC switching. Check that your current limit and selected model cover the intended test conditions.
Choose Your 400V DC Power Supply
Select a model to view its specifications, choose the available product options and place your order online.
For selection help or a custom configuration: Email us · WhatsApp
Browse our variable DC power supplies for other output ranges.