High-Performance
Variable Power Supply
for Mission-Critical Applications
Engineered for aerospace, EV battery testing, and advanced laboratory research. Precision-controlled 15V to 1000V series designed for high-reliability industrial procurement.
Industrial Sectors
EV & Battery Testing
High-power variable power supply units for battery charge/discharge cycles and electric vehicle powertrain validation.
Aerospace & Defense
Mission-critical reliability for aerospace research, avionics testing, and extreme environment simulation.
Laboratory Research
Millivolt precision and low ripple noise for semiconductor development and advanced physics laboratories.
Advanced Technical Configurations
Beyond standard DC output, we provide specialized variable power supply solutions for complex industrial requirements.
Linear DC Power
Ultra-low noise variable linear power supply for sensitive analog and audio R&D.
Triple Output
Multi-channel variable power supply for complex FPGA and system-level testing.
Bench Power Supply
Compact, high-precision variable bench power supply for laboratory and R&D use.
High Voltage DC
Advanced high voltage variable power supply solutions up to 1000V DC.
Browse by Specification
Direct access to precision-engineered long-tail parameter series.
Variable Power Supply Selection Matrix
Precision-regulated industrial series technical specifications and procurement data.
| Model Series | Output Range | Ripple & Noise | Accuracy | Display Type | Procurement Actions |
|---|---|---|---|---|---|
| ETM-K3030SPL | 30V 30A | < 10mVrms | 卤0.05% + 5mV | 5-Digit Color Screen | |
| ETM-6005C-2-KOB | 600V 5A | < 600mVp-p | 卤1% + 10 digits | 4-Digit LED | |
| ETM-1005C-2-KOB | 100V 5A | < 100mVp-p | 卤1% + 5 digits | 4-Digit LED | |
| ETM-3050C-2-KOB | 30V 50A | < 200mVp-p | 卤1% + 10 digits | 4-Digit LED | |
| ETM-6020C-2-KOB | 60V 20A | < 50mVp-p | 卤0.5% + 2 digits | 4-Digit LED | |
| ETM-12020C-2-KOB | 120V 20A | < 100mVp-p | 卤0.8% + 5 digits | 4-Digit LED | |
| ETM-3005C-2-KOB | 300V 5A | < 300mVp-p | 卤1% + 10 digits | 4-Digit LED | |
| ETM-DM-EFG | Triple Output | < 50mVp-p | 卤0.5% + 2 digits | 4-Digit LED x3 | |
| ETM-L3001SPV | 300V 1A | < 1mVrms | 卤0.01% + 2mV | 6-Digit VFD | |
| ETM-5002C-2-KOB | 500V 2A | < 500mVp-p | 卤1% + 10 digits | 4-Digit LED | |
| ETM-8006-4-KOB | 800V 6A | < 800mVp-p | 卤1% + 5 digits | 4-Digit LED | |
| ETM-10010C-2-KOB | 100V 10A | < 100mVp-p | 卤0.8% + 5 digits | 4-Digit LED |
What is a Variable Power Supply?
In electronics and industrial engineering, a variable power supply (also known as an adjustable power supply) is a device that allows users to precisely control the output voltage and current. Unlike fixed power sources, a dc variable power supply provides the flexibility needed for testing circuits, charging batteries, and powering industrial machinery under varying conditions.
Whether you are looking for a variable bench power supply for laboratory R&D or a high voltage variable power supply for EV battery validation, the core definition remains the same: providing stable, regulated, and adjustable electrical energy to ensure the safety and performance of the device under test.
Key Terminology
- DC Variable Direct Current
- AC Variable Alternating Current
- CV Mode Constant Voltage
- CC Mode Constant Current
- Linear Low Noise Transformer
- Switching High Efficiency PWM
Variable Power Supply Reviews
Trusted by engineers and procurement teams across global industries.
4.9/5 Average Rating
The 30V 10A linear model is exceptional for our audio R&D. The ripple is virtually non-existent compared to standard switching units.
Senior Electronics Engineer
Audio Systems Corp
Procuring the 1000V series for our aerospace lab was seamless. The technical support and documentation met all our compliance needs.
Procurement Manager
Aerospace Research Inst.
We use the triple output models for our FPGA test benches. Having independent control over three rails in one unit saves significant space.
R&D Lead
Semiconductor Solutions
Procurement & Enterprise Support
We understand that procurement managers need more than just technical specs. Cavalinos provides a streamlined enterprise experience for bulk orders and long-term industrial partnerships.
Global Shipping
Fast, insured logistics for international industrial sites.
Bulk Pricing
Competitive tiered pricing for large-scale infrastructure projects.
Compliance Documentation
Full CE, RoHS, and UL certification reports provided.
Dedicated Account Manager
Single point of contact for all RFQs and technical support.
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Variable Power Supply Guide
Everything you need to know about selecting, operating, and procuring professional DC power solutions.
How to Choose
Selecting the right adjustable DC power supply requires balancing three key factors:
- Peak Requirements: Always choose a unit with 20-30% more voltage and current than your maximum load.
- Linear vs. Switching: Use Linear for low-noise analog work; use Switching for high-power efficiency.
How to Use
Safe and efficient operation of your variable bench power supply starts with these steps:
- Set Limits First: Before connecting your load, adjust the OVP (Over Voltage) and OCP (Over Current) limits.
- CV/CC Modes: Understand that the unit will automatically switch between Constant Voltage and Constant Current.
Where to Buy
Procuring a reliable DC variable power supply is simple through our authorized channels:
- Official Store: Visit our online store for retail orders and live inventory.
- Wholesale: Contact our B2B team for bulk pricing and custom configurations.
Direct Factory Access:
Cavalinos & eTommens Partnership
As the official international B2B gateway, Cavalinos provides direct access to the full manufacturing capabilities of eTommens. This partnership ensures that our enterprise clients receive factory-direct pricing, priority production scheduling, and specialized technical support for complex power infrastructure projects.
By bridging the gap between world-class power electronics manufacturing and global industrial requirements, we offer a seamless procurement path for high-precision variable power supply systems. Our alliance focuses on delivering certified, high-reliability hardware that meets the rigorous standards of aerospace, semiconductor, and automotive testing environments.
Manufacturing Standards
- Quality Control100% Full Load Burn-in
- CertificationsCE, RoHS, ISO9001
- R&D Capacity50+ Power Engineers
- Global LogisticsInsured Air/Sea Freight
Variable Power Supply FAQ
Expert answers to common questions about adjustable power solutions.
What is a variable power supply?
A variable power supply is an electronic device that allows users to adjust the output voltage and current to meet specific requirements. Unlike fixed power supplies, these units are essential for testing, R&D, and industrial applications where different power levels are needed.
Switching vs. Linear Power Supplies?
Switching power supplies (SMPS) are highly efficient, compact, and ideal for high-power applications. Linear power supplies offer ultra-low noise and ripple, making them perfect for sensitive analog circuit testing and audio equipment.
How to choose the right amperage?
Always select a power supply with at least 20-30% more current capacity than your maximum load requirement. This "headroom" ensures the supply operates coolly and handles transient current spikes without triggering protection circuits.
What safety features should I look for?
Essential protections include Over-Voltage Protection (OVP), Over-Current Protection (OCP), and Over-Temperature Protection (OTP). For high-voltage units, galvanic isolation and rapid discharge circuits are also critical for operator safety.
Official International B2B Gateway for eTommens
Cavalinos serves as the official international B2B gateway for eTommens precision power solutions. We are dedicated to providing the most comprehensive range of variable power supply solutions for global industrial and laboratory needs. From compact benchtop units for DIY electronics to high-power 1000V+ systems for aerospace and EV battery testing, our curated selection ensures you find the exact voltage and amperage combination required for your project.
As the strategic B2B portal for eTommens, Cavalinos bridges the gap between world-class manufacturing and the complex requirements of international enterprise clients. Our products feature advanced switching technology, programmable interfaces (RS232/USB/LAN), and high-resolution displays to provide the precision control demanded by modern R&D.
Ready to Upgrade Your
Variable Power Supply Infrastructure?
Contact our technical sales team for bulk procurement, custom specifications, or to check live inventory at our official online store.