300V variable DC power supplies provide adjustable 0–300V output for laboratory testing and equipment development. Compare 1A linear models with five- or six-digit displays and higher-current bench models from 2A to 20A. Find the current range, display and control options for your test in the 300V model comparison, then select a product to order online.
300V DC Power Supply Model Comparison
| Model | Voltage range | Current range | Controls / display | Order online |
|---|---|---|---|---|
| eTM-3005C | 0–300V | 0–5A | Two-knob controls | View Product |
| eTM-3002 | 0–300V | 0–2A | Four-knob encoder controls | View Product |
| eTM-L3001SPV+ | 0–300V | 0–1A | Six-digit VFD | View Product |
| eTM-L3001SPV | 0–300V | 0–1A | Five-digit VFD | View Product |
| eTM-L3001SPD+ | 0–300V | 0–1A | Six-digit digital tube | View Product |
| eTM-L3001SPD | 0–300V | 0–1A | Five-digit digital tube | View Product |
| eTM-L3001SPL+ | 0–300V | 0–1A | Six-digit color screen | View Product |
| eTM-L3001SPL | 0–300V | 0–1A | Five-digit color screen | View Product |
| eTM-L3001SP+ | 0–300V | 0–1A | Six-digit blue screen | View Product |
| eTM-L3001SP | 0–300V | 0–1A | Five-digit blue screen | View Product |
| eTM-30020C | 0–300V | 0–20A | Two-knob controls | View Product |
| eTM-30010C | 0–300V | 0–10A | Two-knob controls | View Product |
| eTM-3003C | 0–300V | 0–3A | Two-knob controls | View Product |
| eTM-3002C | 0–300V | 0–2A | Two-knob controls | View Product |
| eTM-30020 | 0–300V | 0–20A | Four-knob encoder controls | View Product |
| eTM-3005 | 0–300V | 0–5A | Four-knob encoder controls | View Product |
| eTM-3003 | 0–300V | 0–3A | Four-knob encoder controls | View Product |
Choose a 300V Supply for Your Test
Low-current tests needing finer setting increments
The L3001 linear series provides 0–300V and 0–1A. Five-digit versions list 10mV voltage and 0.1mA current display resolution; the plus versions list 1mV and 0.01mA. Compare eTM-L3001SPV with eTM-L3001SPV+ when selecting a VFD display, or choose the digital-tube, blue-screen or color-screen versions in the table. These are display increments, not a substitute for the model’s setting accuracy.
Bench loads requiring 2A, 3A or 5A
For loads above 1A, compare the eTM-3002/3002C, 3003/3003C and 3005/3005C pairs. The four-knob models offer encoder adjustment controls; C models use two knobs. eTM-3005C provides a 0–5A range and selectable computer-control interfaces. Include start-up current and the continuous power required at each voltage when choosing a model.
Higher-current loads requiring 10A or 20A
eTM-30010C lists a 0–10A range; eTM-30020 and eTM-30020C list 0–20A. A 200V load drawing 10A requires 2000W; at 20A it requires 4000W. Match the product’s continuous output capability and AC input to those operating points. A maximum current value alone does not establish the complete usable power range.
Features for Laboratory Testing
- Adjustable CV/CC output: the listed models provide continuously adjustable voltage and current with automatic constant-voltage/constant-current operation. Set the current limit for the connected load.
- Linear model specifications: the L3001 series lists voltage setting accuracy of ±(0.03% of reading + 10mV) at 25±5°C and voltage ripple/noise of ≤1mVrms. Compare the complete specifications with your test requirements.
- Display and control choices: select among the linear series display types, five- or six-digit versions, and two- or four-knob higher-current models.
- Protective functions: the L3001 series lists overload, reverse-polarity, overvoltage, overcurrent and overtemperature protection. The higher-current models list overvoltage, overcurrent, overpower, overtemperature and short-circuit protection.
300V Power Supply FAQs
Which 300V DC power supply is best for a 1A laboratory test?
Compare the L3001 linear models if the load stays within 0–1A and 0–300V. Choose a display type and resolution, then compare setting accuracy, ripple/noise and the control interface needed for your setup. The plus versions offer finer display increments than the five-digit versions.
My load needs 300V and 2A. Which model should I consider?
Start with eTM-3002 or eTM-3002C, both listing 0–300V and 0–2A ranges. That load needs 600W. Check the continuous output specification and allow for start-up demand before choosing the configuration; a 1A linear model does not cover a 2A requirement.
Can I use a 300V power supply at 100V or 200V?
Yes. The listed products specify a continuously adjustable 0–300V output range. Set the voltage and current limit for the load, then check resolution and continuous power at that operating point.
Can I control a 300V bench power supply from a computer?
The eTM-3005C product options include RS232, RS485, USB and RS232 plus analogue control. The eTM-L3001SP+ lists optional RS232/RS485/USB/Ethernet interfaces. Choose the interface and confirm command support for your software; interface availability and configuration differ by model.
What is the difference between five-digit and six-digit linear models?
The five-digit L3001 versions list 10mV and 0.1mA display resolution; six-digit plus versions list 1mV and 0.01mA. Finer display resolution helps show smaller changes, while accuracy must be compared separately.
Can I order a 300V model for 110V AC input?
The L3001 specifications list AC110V/220V toggle input. On the eTM-3005C product page, the 110–130V option is limited to output power of 1200W or less. Check the input configuration on the exact product you order.
Choose Your 300V DC Power Supply
Select a model to view its specifications, choose the available product options and place your order online.
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Browse our variable DC power supplies for other output ranges.