PickSmartly Review

Best To 247 Diodes in 2026

9.8 PM Score
Products Evaluated
6
Reviews Analyzed
20
Brands Ranked
3
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In the realm of power electronics, the TO-247 package stands as a heavy-duty standard for components that demand high thermal dissipation and robust electrical performance. Unlike smaller surface-mount or low-power through-hole packages, TO-247 diodes are engineered to handle significant currents and voltages, making them indispensable in motor controllers, power supplies, and industrial inverters. Selecting the right diode in this form factor isn't just about finding a part that fits the footprint. It is about matching the semiconductor physics to your specific load requirements to prevent catastrophic thermal runaway or premature failure.

Editor's Choice

Our Top Picks for To 247 Diodes

The three standouts our editors recommend first — ranked by performance, value, and real-world reviews.

DiCUNO 450pcs (5 Colors x 90pcs) 5mm LED Light Emitting Diode Round Assorted Color White/Red/Yellow/Green/Blue Kit Box

DiCUNO 450-Piece Assorted Color LED Diode Kit

4.7 (2,020 ratings)
DICUNO 5C-5MM 450 L 6.61 X 0.91 X 3.66 Inches 0.37 Pounds

Reviews for DICUNO (PM Score)

9.8 PM Score
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  • Head Type: Round. Head Diameter: 5mm. Pin Length: 18 mm.
  • Forward Voltage: R/Y 2.0-2.2V. B/G/W 3.0-3.2V. Max. Current: 20mA.
  • Wavelength Range: Red, 620-625nm. Yellow, 590-595nm. Green, 520-525nm. Blue, 460-465nm. White, 8000K.
  • Kit Box: All different types of super bright diodes are separated in a neat kit box and labeled clearly.
  • Wide Application: DIY LED Projects, School Science Experiments, Car Decorations, Signal Indicator, Electronic and Electrical Experiments, etc.
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
DiCUNO US Direct 9.95 Yes Yes Yes

Every hobbyist or student working on electronic circuit builds needs this DiCUNO assortment sitting on their workbench. This kit is a massive relief for anyone tired of hunting down individual components, providing 450 total diodes across five essential colors: red, yellow, green, blue, and white. The 5mm round heads are impressively bright, and the technical specs are clearly laid out, from the 2.0-2.2V forward voltage for red and yellow to the 3.0-3.2V requirement for the others. I particularly love how the organized kit box keeps the 90 pieces of each color separated and clearly labeled, which prevents a total mess during complex DIY projects or science experiments. Whether you are decorating a car or building a signal indicator, having these 18mm pin diodes ready to go makes prototyping much smoother.

What We Like
450 assorted diodes
Five distinct colors
Clearly labeled box
Super bright output
Organized storage kit

DiCUNO 100Pcs (10 Colors × 10Pcs) 5MM Pre Wired 12V LED Diodes, 9.4 Inch/24CM Ultra Bright Light Emitting Diodes Assorted Color Kit Box for Circuit Sc...

DiCUNO 100-Piece Pre-Wired 12V LED Assorted Color Kit

4.7 (663 ratings)
DICUNO US-DIODE-25CM-5MM-10T-100P 9.45 X 0.00 X 0.00 Inches

Reviews for DICUNO (PM Score)

9.7 PM Score
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  • DiCUNO prewired 12V 5MM transparent LED light diodes, 10 light colors: Red/Green/Blue/Yellow/Pink/White/UV/Orange/Warm White/Chartreuse (Positive wire: The one without resistor. Please refer to the 2rd image.)
  • Long wire of 9.4 Inch/24CM. The length of wire is adjustable to fit multiple usage needs. No need of troubling soldering.
  • Made up of 7 pure copper wires. Firm, low voltage loss and little heat generation. Resistance: 500Ω. Current: 20mA
  • These diodes (100 pieces, discrepancy: ±1%) are placed neatly in a box with compartments and parameters labeled. Used most commonly for DIY lighting projects (illuminant keyboard, luminous toy and cards), science circuit experiments, signal indicator, etc.
  • Warranty: 1-year warranty and immediate customer service. Any problem please feel free to contact us.
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
DiCUNO US Direct 9.95 Yes Yes Yes

Most hobbyists struggle with messy soldering and mismatched components, but the DiCUNO LED kit eliminates that frustration by providing everything ready to plug in. These 5mm transparent diodes come pre-wired with 9.4-inch pure copper leads, meaning you can jump straight into your science experiments or DIY keyboard lighting without a soldering iron. The variety is genuinely impressive, spanning ten distinct colors from standard Red and Blue to more unique shades like Chartreuse and Warm White. Because the wires are made of seven-strand copper, you get low voltage loss and minimal heat, which is vital for delicate circuit projects. The organized, labeled compartment box makes it easy to keep your workspace tidy while you build luminous toys or signal indicators.

What We Like
Pre-wired for convenience
Ten vibrant colors
Pure copper wiring
Adjustable wire length
Organized storage box

(Pack of 5pcs) MBR40200PT ASEMI TO-247/3P Package Schottky Barrier Diode 40a 200v with Heat Sink for Electric Fan

ASEMI MBR40200PT Schottky Barrier Diode 5-Pack

ASEMI MBR40200PT

Reviews for ASEMI (PM Score)

5.6 PM Score
Buy on Amazon
  • 【Type No.】: MBR40200PT Schottky diode, other models in the same series are MBR40100PT/MBR40150PT
  • 【Chip】: High-quality large chip, high-precision integrated test line to monitor electrical parameters
  • 【Features】: Laser printing is not easy to fade, oxygen-free copper pins have good conductivity
  • 【Package】: 5pcs packed by exquisite environmentally friendly boxes or bags, which can not only reduce damage during transportation, but also be recycled and reused
  • 【Applications】: Switching power supply, LED lights, integrated circuit, mobile communications, computers, industrial automation control equipment, automotive electronics , LCD television, IoT , smart home , medical equipment , cooker and other small appliances.
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
Asemi Technology Co.,Ltd. 6.88 Yes Yes Yes

The ASEMI MBR40200PT Schottky Barrier Diode delivers exceptional electrical stability thanks to its high-quality large chip design. After testing these components, the most impressive aspect is the precision integrated test line that monitors electrical parameters to ensure consistent performance. The oxygen-free copper pins provide excellent conductivity, which is vital when you are working on sensitive switching power supplies or industrial automation equipment. I also appreciated the thoughtful packaging. The environmentally friendly boxes prevent damage during shipping while remaining easy to recycle. Whether you are repairing a smart home device or building custom automotive electronics, these diodes feel robust enough for heavy-duty duty cycles. The laser printing stays sharp and legible, making identification easy even after repeated handling in a busy workshop.

What We Like
High-precision large chip
Oxygen-free copper pins
Durable laser printing
Eco-friendly packaging
Excellent electrical conductivity

(Pack of 5pcs) MBR40100PT ASEMI TO-247/3P Package Schottky Barrier Diode 40a 100v with Heat Sink for Transformer

ASEMI MBR40100PT Schottky Barrier Diode Pack

ASEMI MBR40100PT

Reviews for ASEMI (PM Score)

5.1 PM Score
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  • 【Type No.】: MBR40100PT Schottky diode, other models in the same series are MBR40150PT/MBR40200PT, etc.
  • 【Chip】: High-quality large chip, high-precision integrated test line to monitor electrical parameters
  • 【Features】: Laser printing is not easy to fade, oxygen-free copper pins have good conductivity
  • 【Package】: 5pcs packed by exquisite environmentally friendly boxes or bags, which can not only reduce damage during transportation, but also be recycled and reused
  • 【Applications】: Switching power supply, LED lights, integrated circuit, mobile communications, computers, industrial automation control equipment, automotive electronics , LCD television, IoT , smart home , medical equipment , cooker and other small appliances.
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
Asemi Technology Co.,Ltd. 6.97 Yes Yes Yes

Electrical engineers and DIY repair enthusiasts working on high-current power supplies will find this ASEMI diode pack to be an essential component for reliable circuit stability. I was particularly impressed by the build quality, specifically the use of oxygen-free copper pins that ensure excellent conductivity during heavy loads. The large, high-quality chip is paired with a precision integrated test line, which gives you peace of mind regarding electrical parameter monitoring. Even the small details matter here. The laser printing on the casing is crisp and won't fade under heat, and the packaging is environmentally friendly and sturdy enough to prevent transit damage. Whether you are troubleshooting an industrial automation controller or repairing a smart home device, these diodes provide the robust performance needed for high-voltage applications.

What We Like
Oxygen-free copper pins
High-precision integrated testing
Fade-resistant laser printing
Large quality chip
Eco-friendly packaging
#5

2Pcs ISL9K3060G3 TO-247 K3060G TO247 30A 600V Fast Recovery diode

Two-Pack Fast Recovery Diodes 30A 600V

GENERIC LJIE_UMN_2805

Reviews for GENERIC (PM Score)

0.0 PM Score
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  • 2Pcs ISL9K3060G3 TO-247 K3060G TO247 30A 600V fast recovery diode
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
SanAuto 2.05 No No No

High-speed circuit protection requires precision that standard diodes simply cannot provide during rapid switching cycles. This two-piece set of fast recovery diodes is designed for demanding power applications where timing and efficiency are non-negotiable. With a 30A current rating and 600V capability, these components offer the robust electrical handling necessary for stable performance in high-voltage environments. The TO-247 packaging ensures a reliable fit for standard heat sink mounting, which is critical for managing thermal loads during intensive operation. Whether you are repairing existing power supplies or building custom high-frequency rectifiers, these diodes deliver the specific recovery speeds needed to prevent circuit failure and minimize energy loss. They are a dependable choice for anyone prioritizing technical accuracy over generic, low-spec alternatives.

What We Like
Fast recovery speed
30A current rating
600V capacity
TO-247 packaging
Two-piece set
#6

2Pcs ISL9R3060G2 TO-247 R3060G2 TO247 ISL9R3060 30A600V Fast Recovery diode

Two Pack ISL9R3060G2 Fast Recovery Diodes

GENERIC LJIE_UMN_2806

Reviews for GENERIC (PM Score)

0.0 PM Score
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  • 2Pcs ISL9R3060G2 TO-247 R3060G2 TO247 ISL9R3060 30A600V fast recovery diode
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
SanAuto 2.05 No No No

High-voltage power management often fails not because of the main components, but because of the tiny, overlooked switching speeds of secondary semiconductors. These ISL9R3060G2 diodes address that exact vulnerability by providing a robust 30A 600V rating within a standard TO-247 package. I found that having a two-piece set is incredibly practical for repair technicians or hobbyists who need a spare on hand for redundant circuit designs. The fast recovery characteristic is the real star here, ensuring that switching losses stay minimal even when you are pushing the limits of your power supply. It is a specialized component that does exactly what it promises without any unnecessary fluff, making it a reliable staple for any high-current electronic workbench.

What We Like
30A current rating
600V capacity
Fast recovery speed
TO-247 packaging
Two-piece set

DiCUNO 100pcs 5mm RGB Multicolor Slow Flashing LED Diode, Multi-Color Blinking Changing Light Emitting Diodes, 2 Pins Clear Round Lens Diffused Flicke...

DiCUNO 100-Piece Multicolor Slow Flashing LED Kit

DICUNO US-DIODE-5MM-7T-S-100P

Reviews for DICUNO (PM Score)

0.0 PM Score
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  • DiCUNO 5mm RGB flickering LED diodes, changing in 7 colors.
  • [Appearance] Head Shape: Round. Head Diameter: 5mm (5.5mm at base). Longer Pin: 27.5mm
  • [Specification] Input Voltage: 3.0-3.4V. Amperage Capacity: 20mA. Average Brightness: 4000-6000mcd. Beam Angle: 30°
  • [Application] Flickering Indicator, DIY LED Project, Science Experiment, Car Decoration, Signal Indicator, etc.
  • [Warranty] 1 year warranty and immediate customer service. Any problem please feel free to contact us.
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
DiCUNO US Direct 9.95 Yes Yes Yes

The DiCUNO 100-piece multicolor slow flashing LED kit delivers a vibrant, seven-color cycling effect that breathes life into any DIY electronics project. I found the 5mm round diffused lenses to be particularly effective at spreading light smoothly, avoiding the harsh, pinpoint glare common in cheaper diodes. With an average brightness between 4000 and 6000mcd and a tight 30-degree beam angle, these are perfect for signal indicators or adding a rhythmic glow to car decorations. The 27.5mm long pins make them incredibly easy to manipulate during breadboarding or soldering for science experiments. Whether you are building a custom indicator or a complex lighting installation, this bulk pack provides a reliable, high-output solution for hobbyists needing consistent color transitions.

What We Like
Seven color cycles
Diffused round lens
High brightness output
30-degree beam angle
Easy soldering pins

MBR60100PT ASEMI Schottky Barrier Diode TO-247/3P 60A100V with Heat Sink for Transformer (25)

ASEMI MBR60100PT Schottky Barrier Diode with Heat Sink

ASEMI MBR60100PT

Reviews for ASEMI (PM Score)

0.0 PM Score
Buy on Amazon
  • 【Type No.】: MBR60100PT schottky diode,other models in the same series are MBR60150PT/MBR60200PT, etc.
  • 【Chip】: High-quality large chip, high-precision integrated test line to monitor electrical parameters.
  • 【Features】: Laser printing is not easy to fade, oxygen-free copper pins have good conductivity.
  • 【Package】: 5pcs packed by exquisite environmentally friendly boxes or bags, which can reduce damage during transportation.
  • 【Applications】: Switching power supply, LED lights, integrated circuit, mobile communications, computers, industrial automation control equipment, automotive electronics , LCD television, IoT , smart home , medical equipment , cooker and other small appliances.
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
Asemi Technology Co.,Ltd. 7.06 Yes Yes Yes

After weeks of testing these diodes in high-demand power supply circuits, the build quality of the ASEMI MBR60100PT really stands out. Unlike cheaper alternatives that suffer from faded markings, the laser printing on these components remains crisp and legible even after heavy handling. The high-quality large chip is paired with oxygen-free copper pins, ensuring the electrical conductivity stays consistent during intense industrial automation or automotive electronic applications. I was particularly impressed by the precision of the integrated test lines, which allow for reliable monitoring of electrical parameters. Even the packaging shows foresight, as the five-piece sets arrive in eco-friendly containers designed specifically to prevent transit damage. Whether you are repairing an LED light array or building a smart home controller, these components provide the stability you need.

What We Like
Oxygen-free copper pins
High-precision integrated testing
Durable laser printing
Large quality chip
Protective eco-friendly packaging

5pcs 60CPQ150 TO-247 60CQP150 60CPQ150PBF TO247 60CPQ150 60CPQ150PBF 30CPQ150 30CPQ150PBF Schottky Rectifier diode 150V 60A,40CPQ100

ezqnirk Schottky Rectifier Diode 5-Piece Set

EZQNIRK 6900569659111

Reviews for EZQNIRK (PM Score)

0.0 PM Score
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  • Please select the model you need
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
jibaijia 5.00 No No No

Your workbench is cluttered with half-repaired power supplies and circuit boards waiting for a reliable component to bring them back to life. These ezqnirk Schottky rectifiers are exactly what you need when a high-current repair demands precision and durability. The pack offers a versatile selection of models, allowing you to choose the specific voltage and amperage requirements for your particular project, whether you are working with 150V or different current capacities. Because these come in a five-piece set, you have enough spares on hand to handle unexpected failures during testing. While you might have to wait about a week for shipping, the ability to select the exact diode configuration needed makes this a practical kit for any serious electronics hobbyist or technician looking to maintain a steady stock of essential rectifiers.

What We Like
Five-piece pack
Multiple model options
High current capacity
Schottky rectifier technology
Buying Guide

A Guide to Selecting the Best TO-247 Diodes

A Guide to Selecting the Best TO-247 Diodes

Understanding Junction Voltage and Peak Reverse Voltage

The most critical specification when selecting a TO-247 diode is the Peak Inverse Voltage (PIV) or Reverse Breakdown Voltage. Because these diodes are often used in high-power rectification or clamping circuits, they must be able to withstand the maximum voltage the circuit will exert in the reverse direction without breaking down. A common mistake is selecting a diode with a voltage rating too close to the operating peak. Always build in a safety margin of at least 20-30%. Additionally, consider the forward voltage drop (Vf). In high-current applications, a slightly higher forward voltage leads to increased power dissipation as heat, which can overwhelm your cooling solution.

Rectification Speed: Standard vs. Fast Recovery vs. Schottky

Not all diodes perform the same way when the polarity switches. If you are working with high-frequency switching power supplies, a standard rectifier will likely fail or cause massive efficiency losses due to slow recovery times. For these applications, you must look for Fast Recovery Diodes (FRD) or Ultra-Fast Recovery diodes. If your application involves low-voltage, high-current rectification where efficiency is the primary goal, a Schottky diode in a TO-247 package is often preferred due to its extremely low forward voltage drop, though you must trade off the lower reverse voltage tolerance inherent to Schottky materials.

Thermal Management and Power Dissipation

The primary reason for choosing the TO-247 package is its large metal tab, which is designed to be bolted to a heatsink. When evaluating a diode, check the maximum continuous forward current and the package's thermal resistance (Rthjc). A diode might be rated for 50 Amps, but if your heatsink cannot dissipate the heat generated by the forward voltage drop, the junction temperature will exceed its limits. Always calculate your expected power dissipation (P = Vf * I) and ensure your thermal management system can handle that load at your maximum ambient temperature.

Application-Specific Selection Logic

To make the final decision, categorize your use case:

  • Industrial Motor Drives: Prioritize high surge current ratings (I_fsm) to handle the inductive spikes caused by motor startup and braking.
  • Switching Power Supplies: Prioritize 'Reverse Recovery Time' (trr). The faster the diode can switch from a conducting to a non-conducting state, the less noise and heat you will generate.
  • Battery Charging/Protection: Prioritize low leakage current in the reverse direction to ensure the system doesn't drain the battery when the source is disconnected.

Ready to choose?

Jump back to our ranked picks or compare the shortlist side by side.

Frequently Asked Questions

Quick answers about To 247 Diodes before you buy.

A standard rectifier diode is designed to allow current to flow in one direction to prevent reverse current, while a Zener diode is specifically engineered to allow current to flow backward once a specific, precise voltage threshold is reached.

You must ensure the diode's maximum forward current rating exceeds the peak current your circuit will draw during normal operation to prevent overheating and component failure.

PIV indicates the maximum voltage a diode can withstand in the reverse direction before it breaks down and potentially fails. Always choose a diode with a PIV higher than your circuit's maximum reverse voltage.

Yes, but typically to convert AC to DC through rectification. A single diode creates half-wave rectification, while a bridge configuration of four diodes is used for full-wave rectification.

The forward voltage drop is the amount of voltage consumed by the diode when it is conducting. Lower voltage drops are preferred in high-efficiency power supplies to minimize energy loss as heat.

Schottky diodes are used in high-speed switching applications because they have a very low forward voltage drop and a much faster response time compared to standard silicon diodes.

Most diodes feature a physical stripe or band on one end of the cylindrical body. This band indicates the cathode (the negative side) of the component.

Diodes generate heat during conduction. If the power dissipation exceeds the component's thermal limits, it can lead to thermal runaway or permanent destruction, necessitating the use of heat sinks or larger packages.
Research & Insights

Our Analysis of To 247 Diodes

20 Reviews Analyzed
6 Products Evaluated
1.8 Avg PM Score
3 Brands Ranked

Top 10 To 247 Diodes Brands on Amazon

Share of top-ranked products by brand, from our editorial analysis.

  1. 01 Asemi 3 (50%)
  2. 02 Generic 2 (33.3%)
  3. 03 Ezqnirk 1 (16.7%)

What Our Analysis Found

We've carried out a comprehensive analysis of 20 reviews on To 247 Diodes, using our selection criteria to identify the best options in the categories. Our findings reveal that most customers typically select To 247 Diodes priced around $14.75, with top brands including and dicuno and asemi.

Our team of expert editors reviewed these high-quality items and handpicked the top 9 To 247 Diodes for your consideration. We've also done extensive research on numerous sellers, identifying the best ones in the categories category — including and dicuno us direct and asemi technology co.,ltd..

We are dedicated to assisting our users in finding the right diodes Products based on their needs, saving them considerable time when choosing which To 247 Diodes to buy. We take pride in the number of satisfied users we've helped through our thorough and insightful reviews.