10 Best Benchtop Power Supplies Under $300 for Precise Bench Testing in 2026

The best benchtop power supplies under $300 make it easier to test circuits, power prototypes, charge batteries, and troubleshoot electronics with controlled voltage and current.

This roundup compares ten variable DC supplies across linear and switching designs, output ranges, displays, adjustment controls, USB charging, memory presets, and built-in protection features.

Best 10 Benchtop Power Supplies Under 300 Picks for 2026

Precision Control Pick – NANKADF 30V 10A Variable DC Supply

For shoppers comparing benchtop power supplies under 300, this NANKADF model stands out for precise digital adjustment and a strong 10A output. Its encoder control, output switch, and built-in protections make it practical for electronics testing, repairs, and hobby projects.

Best For: Users who want fine-grained voltage and current adjustment with convenient charging and protection features.

Pros:

• Encoder knob lets you select individual digits for more precise settings.
• Supports up to 30V and 10A with constant-voltage and constant-current modes.
• Includes output enable/disable, overcurrent protection, and an 18W USB fast-charge port.

Cons:

• The supplied notes do not specify a selectable input-voltage range.
• The product listing describes air cooling but does not provide detailed fan behavior.

This is a feature-rich option when accurate adjustments and easy output control matter more than a minimalist design. Verify your test-lead and input-voltage requirements before buying.

Proven Linear Value – Tekpower TP3005T 30V 5A Supply

The Tekpower TP3005T is a straightforward choice among benchtop power supplies under 300, offering a regulated 0–30V, 0–5A output in a metal benchtop enclosure. Its linear design, automatic cooling fan, and included alligator test leads suit general-purpose bench work.

Best For: Makers, students, and repair users who prefer a conventional linear supply with simple controls and a 1-year warranty.

Pros:

• Provides adjustable 0–30V and 0–5A output.
• Offers constant-voltage and constant-current operating modes.
• Includes a backlit LED display, automatic thermo-sensor fan, and alligator test leads.

Cons:

• Its 5A maximum is lower than the 10A output offered by some alternatives.
• The 12-pound metal unit is relatively heavy for a benchtop supply.
• The display resolution is 0.1V and 0.01A, less fine than some newer encoder-controlled models.

This model favors familiar linear-supply operation over modern extras such as USB charging. It is a sensible fit for users who value a sturdy enclosure and uncomplicated voltage and current control.

Feature-Packed Compact Pick – Jesverty SPS-3010V 32V 10A

Among benchtop power supplies under 300, the Jesverty SPS-3010V combines a 32V, 10A switching output with a compact footprint and dual fast-charging ports. Coarse and fine encoder controls, output switching, and selectable 115V/230V input add flexibility for projects, maintenance, and testing.

Best For: Space-conscious users who need high current, fine adjustment, and USB-A/USB-C charging in one unit.

Pros:

• Delivers up to 32V and 10A with 0.01V and 0.001A setting resolution.
• Uses separate coarse and fine encoder knobs for quicker adjustments.
• Includes 20W USB-A and USB-C charging, output ON/OFF control, OCP, and 115V/230V input selection.

Cons:

• The included test leads are described as giveaway leads and may not suit sustained high-current use.
• The switching design may be less suitable for users specifically seeking a linear supply.
• Input settings and power-cord configuration vary by destination.

With its small 7.1-by-3.6-by-6.2-inch footprint and approximately 2.5-pound weight, this is one of the more portable high-output choices. Plan to use adequately rated leads for demanding applications.

Lab-Style Digital Pick – KORAD KD3005D 30V 5A Supply

The KORAD KD3005D offers lab-oriented features in a conventional 30V, 5A linear power supply. For buyers evaluating benchtop power supplies under 300, its dual four-digit displays, digital controls, switchable input, and multiple protection functions make it a well-equipped choice for controlled bench work.

Best For: Electronics users who want separate digital readouts and built-in protection for laboratory-style testing.

Pros:

• Provides adjustable 0–30V and 0–5A output.
• Dual four-digit LED displays show voltage and current separately.
• Includes 110/220V input selection and overload, short-circuit, and over-temperature protection.

Cons:

• The standalone unit measures 14 by 10 by 10 inches, so it needs substantial bench space.
• Its 5A maximum is below the output of 10A models in this roundup.
• The supplied notes do not mention a USB charging port or dedicated output enable button.

The KD3005D prioritizes readable instrumentation and protection rather than compactness or charging features. Its included 5A test leads and power cord make it a practical package for routine lab and repair setups.

Programmable Power Pick – FNIRSI IPS3608 36V 8A

For shoppers comparing benchtop power supplies under 300, the FNIRSI IPS3608 stands out with a 36V, 8A output, 285W capacity, and less than 10mV ripple. Its programmable controls and USB charging ports make it especially versatile for electronics work.

Best For: DIY electronics, sensitive-device testing, and users who want PC control plus USB-A and USB-C charging.

Pros:

• Clean, stable output with less than 10mV ripple.
• PC programmability, six presets, and multiple protection functions.
• USB-A and USB-C ports support several fast-charging protocols.
• Four-digit IPS display includes day/night themes and curve monitoring.

Cons:

• Its 2.05 kg weight is higher than some compact alternatives.
• The feature-rich interface may require time to learn.

The IPS3608 is a strong choice when output cleanliness, monitoring, and automation matter more than having the simplest possible controls. The aluminum housing and built-in fan also support extended bench use.

Compact Charging Choice – Kungber SPS3010B 30V 10A

Among benchtop power supplies under 300, the Kungber SPS3010B offers a practical 30V, 10A, 300W setup in a compact enclosure. Its intelligent charging mode, USB output, and safety detection make it useful for repairs, battery work, and general bench tasks.

Best For: Battery charging, home DIY, repair work, and users who want a compact 300W supply with an 18W USB port.

Pros:

• Provides adjustable output up to 30V and 10A, with 300W maximum power.
• Intelligent charging mode stops charging when a battery is full.
• OCP detection can alarm and stop output during overcurrent or short-circuit conditions.
• Compact 2.3-pound design with an 18W USB charging port.

Cons:

• The plastic enclosure may feel less rugged than metal-bodied supplies.
• Its 30V ceiling is lower than some comparable high-voltage models.

The SPS3010B is a sensible all-purpose option for buyers prioritizing charging features and portability. Its thermal, overload, leakage, grounding, and short-circuit protections add reassurance for routine work.

Quiet Precision Option – UNI-T UTP1306 32V 6A

The UNI-T UTP1306 is a straightforward candidate among benchtop power supplies under 300, delivering adjustable output from 0 to 32V and up to 6A. Its quiet switching design, four-digit display, and stored settings suit repeatable lab and educational work.

Best For: Product development, teaching labs, debugging, maintenance, and users who prefer quiet operation with simple preset recall.

Pros:

• Adjustable 0–32V output with up to 6A of current.
• Four-digit EBTN LCD is designed for viewing from different angles.
• Three memory groups provide one-key voltage and current recall.
• Includes OVP, OCP, OTP, and an independent output switch.

Cons:

• Its 192W output is lower than the 300W capacity of some alternatives.
• It has a single output and does not list USB charging ports.

The UTP1306 favors quiet, repeatable operation over extra connectivity. Its resolution down to 10mV for constant voltage and 1mA for constant current makes it a useful fit for controlled testing and instructional environments.

High-Output Pick – 30V 10A Power Supply with USB-C

For shoppers comparing benchtop power supplies under 300, this WANPTEK POWER DPS3010U stands out with adjustable 0–30V and 0–10A output, up to 300W, and convenient coarse and fine encoder controls. Its USB and USB-C charging ports add utility for repair benches and electronics work.

Best For: Electronics repair, DIY projects, lab work, and users who need up to 10A of adjustable DC output.

Pros:

• Provides adjustable 0–30V, 0–10A output with up to 300W of power.
• Coarse and fine tuning knobs make voltage and current adjustments more efficient.
• Includes 5V/3.6A USB and Type-C charging outputs.
• Offers short-circuit, overheat, leakage, voltage, and power protection.

Cons:

• Its maximum input voltage is listed as 115V, despite automatic 110V/220V detection information in the notes; verify compatibility before use.
• The included package contains basic output and input cables, so specialized leads may be needed for some setups.

This is a strong choice when output capacity and charging convenience matter. The automatic fan, four-digit display, and multiple protections make it practical for regular bench use, while the USB-C port is a useful extra.

Precision Memory Pick – 50V 6A Bench Power Supply

Among benchtop power supplies under 300, the HYELEC HY50-06A is a compact option for users who prioritize higher voltage range and repeatable settings. It delivers 0–50V and up to 6A, with a four-digit display, coarse and fine adjustment, and three memory presets.

Best For: Component testing, phone repair, laboratory work, battery charging, and repetitive DIY procedures requiring up to 50V.

Pros:

• Offers a broad 0–50V range and up to 6A output, rated at 150W.
• Three memory presets allow frequently used settings to be saved and recalled.
• Displays voltage and current with reported 0.01V and 0.001A precision.
• Includes output enable/disable, short-circuit, overvoltage, overcurrent, and temperature protection.

Cons:

• Uses a 110V input only and does not provide a 220V option.
• The enclosure is plastic, which may be less rugged than metal-cased alternatives.
• Its 6A maximum output is lower than some 300W-class models.

The HY50-06A is appealing for precision-focused workflows where saved settings and a 50V ceiling are more valuable than maximum wattage. Its output switch and protections also help reduce mistakes during repeated testing.

Workflow-Friendly Pick – 30V 10A Supply with Presets

For buyers evaluating benchtop power supplies under 300, the WANPTEK TPS-C3010 provides regulated 0–30V and 0–10A output in a compact horizontal design. Three memory presets, an output switch, key lock, encoder adjustment, and OCP protection make it geared toward organized repair and testing workflows.

Best For: Electronics technicians, circuit diagnostics, lab testing, and users who frequently repeat the same voltage and current settings.

Pros:

• Provides up to 30V, 10A, and 300W for a wide range of DC testing tasks.
• Three M1/M2/M3 memory keys streamline recurring repair and test procedures.
• Output ON/OFF, OCP, and key-lock features help prevent wiring and adjustment errors.
• Includes a clear four-digit LED display and USB fast-charge port.

Cons:

• The supplied test leads are described as giveaways and are not intended for heavy, extended high-current use.
• U.S. users must set the rear 115V/230V input switch to 115V before operation.
• The notes do not specify the USB port’s charging output.

This model is a practical fit for busy benches where speed and repeatability matter. Its presets and safety controls are especially useful, but users working continuously at high current should plan to use heavier-duty test leads.

How We Picked the Best Benchtop Power Supplies Under 300

We focused on practical specifications that matter at a workbench: voltage and current range, regulation style, adjustment precision, display readability, output controls, and protection features. The selection includes compact switching supplies, quieter linear models, and higher-output options for demanding projects.

We also considered useful workflow features such as encoder knobs, coarse and fine adjustment, output-enable buttons, memory presets, USB and USB-C ports, intelligent charging modes, and overvoltage, overcurrent, and over-temperature protection. Because included accessories and plugs can vary, verify the listing details before ordering.

Quick Comparison

What to Compare	Why It Matters
Output range	Determines the voltage and current your projects can receive.
Linear or switching design	Linear units are often preferred for low-noise work; switching models are usually lighter and more feature-rich.
Controls and display	Encoder controls, fine adjustment, and four-digit displays improve setup accuracy.
Protection	OVP, OCP, and OTP help protect both the supply and connected equipment.
Extra ports	USB and USB-C outputs can charge devices or power accessories without another adapter.

Key Buying Factors for Benchtop Power Supplies Under $300

Choose the Right Voltage and Current Capacity

A 30V, 5A supply covers many repair, hobby, and educational tasks. Choose a 10A model when you work with motors, LED assemblies, amplifiers, battery packs, or other higher-current loads. A 36V or 50V option provides additional headroom, but only if your projects can use it safely.

Match the Supply Type to Your Work

Linear supplies can be a good fit for sensitive analog circuits, audio testing, and applications where electrical noise matters. Switching supplies tend to offer greater efficiency, higher output capacity, USB charging, and a smaller footprint. For general-purpose bench work, either type can be suitable when its regulation and protection specifications meet your needs.

Look for Precise, Safe Operation

Coarse and fine controls or encoder knobs make it easier to approach a target setting without overshooting. An output switch lets you configure voltage and current before energizing a circuit. Constant-voltage and constant-current indicators, clear four-digit displays, OVP, OCP, and OTP are especially useful during troubleshooting.

Consider Presets, Ports, and Accessories

Memory presets save time when you repeatedly test at the same settings. USB or USB-C ports are convenient but should not be mistaken for the main adjustable output. Check whether test leads, a power cord, or a plug adapter are included and compatible with your region.

Who Should Buy Which Benchtop Power Supplies Under 300?

• For everyday electronics repair: Choose a 0–30V or 0–32V supply with fine adjustment, an output switch, and core protection features.
• For sensitive analog or audio circuits: Consider a linear model and prioritize low-noise operation, stable regulation, and readable controls.
• For motors, batteries, and higher-current projects: Select a 6A or 10A model, checking its charging mode and current-limit behavior.
• For compact, feature-rich benches: A switching supply with USB-C, memory presets, and an encoder can provide strong versatility.
• For advanced hobbyists and labs: Look for higher voltage headroom, four-digit readouts, independent protection settings, and dependable adjustment precision.

Before buying, confirm the maximum output, input voltage, connector type, cooling method, and return policy. The best choice is the model whose range and protections match your actual loads—not simply the one with the highest headline wattage.