The UNI-T UTP3313TFL-II is a professional single-channel linear DC power supply designed for electronics professionals, laboratories, and educational environments requiring precision power with excellent stability. With its 0-3A current output at 0-30V, high-precision regulation, and ultra-low noise characteristics, this 90W benchtop power supply delivers the clean, stable power needed for electronics development, testing, and repair applications. Featuring a high-resolution 4-digit display, exceptional load regulation (CV≤0.01%+5mV), and automatic constant voltage/constant current mode switching, the UTP3313TFL-II provides the precision and reliability required by electronics engineers, technicians, educational laboratories, and repair professionals working with analog circuits, digital systems, embedded development, and precision instrumentation.
The UNI-T UTP3313TFL-II utilizes linear regulation technology to deliver exceptionally clean, stable power essential for professional electronics work. Unlike switching power supplies that introduce high-frequency noise, the UTP3313TFL-II's linear design provides pure DC power with minimal interference. With ripple and noise specifications of just 2mVrms and exceptional load regulation (CV≤0.01%+5mV, CC≤0.1%+10mA), this power supply ensures that measurements, test results, and circuit behavior remain unaffected by power supply artifacts.
The 0-3A current capacity is perfectly suited for the vast majority of electronics development, repair, and educational applications. Most microcontroller development boards, analog circuits, sensor modules, and prototyping projects draw well under 2A, making the UTP3313TFL-II's 3A rating more than sufficient with comfortable headroom. The precision 4-digit display with 10mV/1mA resolution allows exact setting and monitoring of power parameters, crucial for replicating specific operating conditions and ensuring consistent power delivery for reliable results.
The UTP3313TFL-II's high-resolution display and precision control capabilities provide the accuracy needed for professional electronics work:
This level of precision enables accurate replication of test conditions, detailed characterization of component behavior, and reliable documentation of circuit performance across the full range of voltage and current settings.
The UTP3313TFL-II automatically switches between constant voltage (CV) and constant current (CC) modes based on load conditions, providing intelligent power delivery and comprehensive protection:
This automatic operation proves particularly valuable when powering unknown or prototype circuits, testing battery charging algorithms, characterizing component behavior under current-limited conditions, or protecting expensive devices from accidental overcurrent damage. The 3A current limit provides ample protection for typical development and testing scenarios while preventing damage to sensitive components.
Design engineers and developers rely on the UTP3313TFL-II's clean power for:
Educational institutions utilize the UTP3313TFL-II's precision and safety features for:
Service technicians depend on the UTP3313TFL-II's precision and protection for:
Embedded developers leverage the UTP3313TFL-II's capabilities for:
| Parameter | Specification |
|---|---|
| Model | UTP3313TFL-II |
| Output Voltage | 0-30V (continuously adjustable) |
| Output Current | 0-3A (continuously adjustable) |
| Output Power | 90W |
| Load Regulation (CV) | ≤0.01%+5mV |
| Load Regulation (CC) | ≤0.1%+10mA |
| Programming Accuracy (25°C±5°C) | Voltage: <0.5%+20mV Current: <0.5%+10mA |
| Ripple and Noise | ≤2mVrms |
| Output Regulate Resolution | CV: 10mV (typical), CC: 1mA (typical) |
| Reliability (MTBF) | ≥2000 hours |
| Display Mode | 4-digit LED voltage and current dual display |
| Operating Features | Automatic CV/CC mode switching with current limit protection |
| Feature | UTP3313TFL-II | UTP3315TFL-II |
|---|---|---|
| Output Voltage | 0-30V | 0-30V |
| Output Current | 0-3A | 0-5A |
| Output Power | 90W | 150W |
| Load Regulation (CV) | ≤0.01%+5mV | ≤0.01%+5mV |
| Load Regulation (CC) | ≤0.1%+10mA | ≤0.1%+10mA |
| Ripple & Noise | ≤2mVrms | ≤2mVrms |
| Display Resolution | 10mV / 1mA | 10mV / 1mA |
| Weight | 3.5kg (7.7 lbs) | 4kg (8.8 lbs) |
| Best For | General electronics work, education, standard development | Higher-power applications, production testing, industrial repair |
What makes a linear power supply better for certain applications?
Linear power supplies like the UTP3313TFL-II provide significantly cleaner power with lower noise and ripple compared to switching power supplies. This clean power is essential for sensitive analog circuits, audio applications, and precision measurement systems where even small power fluctuations can affect performance or test results. The linear regulation technology eliminates the high-frequency switching noise that can interfere with sensitive electronics, making it ideal for RF applications, audio equipment development, and laboratory measurement scenarios where power supply artifacts could compromise results.
Is 3A sufficient for most electronics development work?
For the vast majority of electronics development, repair, and educational applications, 3A provides ample power capacity. Most microcontroller development boards draw 50-500mA, Arduino boards typically draw under 200mA, Raspberry Pi boards draw 500mA-2.5A depending on peripherals, and typical analog circuits draw just a few milliamps to a few hundred milliamps. The UTP3313TFL-II's 3A rating covers these applications with comfortable headroom. Only when regularly working with high-power motor controllers, charging large battery packs, or testing power amplifier circuits that consistently require more than 2.5A would the UTP3315TFL-II's 5A rating become necessary.
How does the current limiting protection work?
The current limiting protection automatically restricts the output current to your preset maximum value. When the load attempts to draw more current than your set limit, the power supply transitions from constant voltage (CV) to constant current (CC) mode, maintaining the current at your preset limit while reducing the voltage as needed. This protects both the power supply and your connected devices from overcurrent conditions. The visual indicators clearly show which mode is active, allowing you to immediately identify when a circuit is attempting to draw excessive current, which is valuable for troubleshooting short circuits or identifying faulty components.
Can this power supply be used for battery charging applications?
Yes, the UTP3313TFL-II is well-suited for controlled battery charging applications up to 3A. The constant current mode allows you to set a precise charging current that remains stable throughout the charging cycle, while the constant voltage mode provides the proper charging voltage. The ability to monitor both voltage and current simultaneously helps you track charging progress and identify when the battery reaches full charge. This makes it ideal for developing and testing battery charging circuits, charging small to medium lithium-ion or lead-acid battery packs, and characterizing battery charging behavior under controlled conditions.
What is the difference between the UTP3313TFL-II and UTP3315TFL-II models?
The primary difference is the current capacity and power rating. The UTP3313TFL-II offers 0-3A output and 90W of power, while the UTP3315TFL-II provides 0-5A output and 150W of power. Both models share the same excellent load regulation, ripple and noise specifications, display resolution, and compact dimensions. The UTP3313TFL-II is ideal for general electronics work, education, and standard development where loads typically stay below 2.5A. The UTP3315TFL-II is more suitable for applications requiring greater current such as testing higher-power devices, motor controllers, power amplifiers, or industrial systems. For most electronics professionals, the UTP3313TFL-II provides excellent value with specifications that match or exceed typical requirements.
Can this be used for automotive electronics testing?
Yes, the UTP3313TFL-II is suitable for testing many automotive electronics components. The 0-30V range covers typical 12V and 24V automotive systems with headroom for voltage drop testing, while the 3A capacity is sufficient for most control modules, sensors, fuel injectors, and smaller actuators. The clean power output ensures accurate testing conditions, and the current limiting protection helps prevent damage when testing unknown or potentially faulty components. For testing higher-current automotive components like starter solenoids, power window motors, or heavy-duty relays, the UTP3315TFL-II's 5A rating would be more appropriate.
What is the warranty period for the UNI-T UTP3313TFL-II?
The UTP3313TFL-II includes our Exclusive 3+2 Warranty program. You receive a standard 3-year warranty covering manufacturing defects and component failures under normal use conditions. Register your power supply on our website within 30 days of purchase to receive an additional 2 years of coverage at no cost, for a total of 5 years of protection. This comprehensive warranty ensures your investment in professional test equipment is protected, giving you confidence in your purchase decision.
UNI-T stands behind the UTP3313TFL-II with comprehensive technical support and our Exclusive 3+2 Warranty program (3 years standard, plus 2 additional years free with product registration). Our dedicated support team is available to assist with configuration questions, application support, and warranty service.
The UNI-T UTP3313TFL-II Linear DC Power Supply delivers exceptional precision, stability, and reliability for professional electronics development, testing, and repair. With its 0-3A current output at 0-30V, ultra-low ripple and noise specifications (≤2mVrms), superior load regulation (CV≤0.01%+5mV), and high-resolution 4-digit display, it provides the clean, stable power essential for demanding electronics work. The 90W power capacity, automatic CV/CC mode switching, compact professional design, and lightweight construction make the UTP3313TFL-II the ideal power solution for engineers, technicians, and educational laboratories who need laboratory-grade performance at an accessible price point for general electronics applications.
Order Your UNI-T UTP3313TFL-II Today and Experience Professional-Grade Linear Power Supply Performance
