UTP3313TFL-II 1Ch Linear DC Power Supply

UNI-T UTP3313TFL-II Linear DC Power Supply

Precision Single-Channel Power for Professional Electronics Work

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.

Key Features

• Professional Power Capacity: 0-30V voltage range with 0-3A current output for general electronics work
• 90W Total Power Output: Ample power for most development and testing applications
• High-Resolution Display: 4-digit voltage and current display with 10mV/1mA precision
• Ultra-Clean Power: Exceptionally low ripple and noise (≤2mVrms) for sensitive electronics
• Superior Load Regulation: CV≤0.01%+5mV, CC≤0.1%+10mA for consistent power delivery
• Linear Design: Clean, noise-free power superior to switching supplies
• Automatic CV/CC Mode Switching: Seamless transition with current limit protection
• Compact Professional Design: Robust construction in space-efficient form factor
• Outstanding Reliability: MTBF(e) of ≥2000 hours for dependable long-term operation
• Universal Power Input: Compatible with 110V/220V±5% AC, 50Hz/60Hz power sources

Laboratory-Grade Linear Power for Professional Applications

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.

Precision Control and Monitoring

The UTP3313TFL-II's high-resolution display and precision control capabilities provide the accuracy needed for professional electronics work:

• 4-Digit LED Display: Simultaneous voltage and current monitoring with clear visibility
• 10mV Voltage Resolution: Precise voltage setting and monitoring for exacting requirements
• 1mA Current Resolution: Fine current control for sensitive applications
• Programming Accuracy: Voltage <0.5%+20mV, Current <0.5%+10mA at 25°C±5°C
• Stable Readout: Minimal display fluctuation even with varying loads

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.

Automatic Constant Voltage/Constant Current Operation

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:

• Constant Voltage Mode: Maintains precise voltage output while current varies with load
• Constant Current Mode: Limits current to preset value, protecting circuits from overcurrent
• Automatic Mode Switching: Seamless transition between CV and CC based on load requirements
• Current Limit Protection: Set maximum current to protect sensitive components during testing
• Visual Mode Indication: Clear LED indicators show active operating mode

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.

Professional Applications

Electronics Development and Prototyping

Design engineers and developers rely on the UTP3313TFL-II's clean power for:

• Powering breadboard circuits and development boards with laboratory-grade precision
• Testing prototype designs under controlled voltage and current conditions
• Characterizing component behavior across voltage and current ranges
• Developing analog and mixed-signal circuits with ultra-clean power
• Simulating battery discharge characteristics with current limiting

Educational and Training Laboratories

Educational institutions utilize the UTP3313TFL-II's precision and safety features for:

• Student electronics experiments and circuit analysis
• Demonstrating voltage and current relationships in active circuits
• Teaching constant voltage and constant current concepts
• Providing safe, current-limited power for student projects
• Supporting comprehensive electronics education programs

Electronics Repair and Service

Service technicians depend on the UTP3313TFL-II's precision and protection for:

• Powering and testing repaired circuits before reassembly
• Performing current consumption analysis to identify faulty components
• Testing power supply circuits with precisely controlled loads
• Providing clean power for sensitive audio and video equipment testing
• Charging and testing battery-powered devices under controlled conditions

Embedded Systems and Microcontroller Development

Embedded developers leverage the UTP3313TFL-II's capabilities for:

• Powering microcontroller development boards with stable, clean power
• Providing adjustable voltage for testing circuit operation across supply range
• Testing system behavior under varying supply voltage conditions
• Current monitoring to optimize battery-powered device power consumption
• Debugging power-related issues with precise voltage and current control

Technical Specifications

General Specifications

• Power Input: 110V/220V±5% AC (switchable), 50Hz/60Hz
• Display Type: Dual 4-digit LED display
• Display Resolution: 10mV voltage, 1mA current
• Product Color: Professional grey chassis
• Product Net Weight: 3.5kg (7.7 lbs)
• Product Dimensions (W×H×D): 105mm × 165mm × 249mm (4.1" × 6.5" × 9.8")
• Cooling: Forced air cooling with internal fan

Package Contents

• UNI-T UTP3313TFL-II Linear DC Power Supply
• International Standard Power Cord
• Test Output Line (banana plug cables)
• User Manual

Product Comparison

Frequently Asked Questions

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.

Support and Warranty

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.

Professional Single-Channel Power for General Electronics Work

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